Paste addresses to (batch) geocode

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cities_pandemic.geojson

cities_pandemic.txt

Algiers, Algeria
Atlanta
Baghdad
Bangkok
Beijing
Bogota
Buenos Aries
Cairo
Chennai
Chicago
Delhi
Essen
Ho Chi Minh City
Hong Kong
Istanbul
Jakarta
Johannesburg
Karachi
Khartoum
Kinshasa
Kolkata
Lagos, Nigeria
Lima
London
Los Angeles
Madrid
Manila
Mexico City
Miami
Milan
Montreal
Moscow
Mumbai
New York
Osaka
Paris
Riyadh
San Francisco
Santiago
Sao Paulo
Seoul
Shanghai
St. Petersburg
Sydney
Taipei
Tehran
Tokyo
Washington DC

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index.html

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" content='initial-scale=1,maximum-scale=1,user-scalable=no' />

    <script src="d3.v3.min.js" charset="utf-8"></script>
    <script src="topojson.v1.min.js" charset="utf-8"></script>
    <script src="mapsense.js" charset="utf-8"></script>


    <link type="text/css"  href="mapsense.css" rel="stylesheet"/>
    <link rel="stylesheet" href="bootstrap.min.css" media="screen" type="text/css">

<style>
    html, body, #myMap {
        height: 100%;
        width: 100%;
        margin: 0; padding: 0;
        font-family: sans-serif;
        overflow: hidden;
    }

    #myMap {
        position: absolute;
        top: 0; right: 0; bottom: 0; left: 0;
    }

    path {
      vector-effect: non-scaling-stroke;
      stroke-linejoin: round;
      stroke-linecap: round;
      stroke: #777;
      fill: none;
    }
    circle {
        fill: rgba(68, 167, 228, 0.5);  /*blue*/
        stroke: none;
    }

    .top-left {
        position: absolute;
        top: 5px;
        left: 5px;
    }
    .btn {
        background-color: rgba(255,255,255,0.8);
        outline: 1px solid rgba(0,0,0,0.3);
        min-width: 60px;
        padding: 2px 4px;
        margin: 2px;
        display: inline-block;
    }


    .point_highlight {
        fill: rgba(68, 167, 228, 0.5);
        /*stroke: rgba(255, 116, 0,1); orange*/
        stroke: rgba(68, 167, 228, 1);  /*blue*/
        stroke-width: 2;
        radius: 50;
    }

    .park {
        fill: none;
        stroke: none;
    }

    .mapsense-attribution {
        /*
        */
        background-color: rgba(250,250,250, 0.5);
        color: #333;
        position: absolute;
        bottom: 0px;
        right: 0px;
        padding: 3px;
        font-size: 13px;
        font-family: sans-serif;
        line-height: 15px;
        text-decoration: none;
        z-index: 99;
    }
    .mapsense-attribution a {
        color: #333;
        text-decoration: none;
    }

    /*
    Non-map UI
    */

    #btn_group {
        position: absolute;
        top: 10px;
        right: 10px;
    }

    .btn {
        background-color: transparent;
        outline: 1px solid rgba(0,0,0,0.3);
        min-width: 60px;
        padding: 2px 4px;
        margin: 2px;
        -webkit-transition: all 0.2s ease 0s;
        -moz-transition: all 0.2s ease 0s;
        -o-transition: all 0.2s ease 0s;
        transition: all 0.2s ease 0s;
    }
    .btn:hover {
        outline: 1px solid rgba(0,0,0,1);
        background-color: rgba(255,255,255,0.8);
        -webkit-transition: all 0.2s ease 0s;
        -moz-transition: all 0.2s ease 0s;
        -o-transition: all 0.2s ease 0s;
        transition: all 0.2s ease 0s;
    }

    .smalllabel {
        font-size: 12px;
        line-height: 10px;
        font-weight: 300;
        display: inline-block;
        margin: 0 auto;
        /*float: right;*/
    }

    #lede {
        position: absolute;
        top: 0;
        left: 0;
        padding: 5px 10px;
        background: rgba(255,255,255,0.5);
        width: 100%;
        height: 20%;
        max-height: 300px;
        border: 0;
        border-bottom: 1px solid #ddd;
    }

    #bottom {
        position: absolute;
        bottom: 0;
        left: 0;
        // padding: 5px 10px;
        background: rgba(255,255,255,0.5);
        width: 100%;
        height: 20%;
        max-height: 300px;
        overflow: scroll;
        font-family: monospace;
        border: 0px solid green;

    }

    .cls-results {
        white-space: pre;
        display: inline-block;
        position: relative;
        width: 50%;
        max-width: 50%;
        height: 100%;
        // background: #ccc;
        border: 0px solid #aaa;
        -webkit-user-select: all; /* Covers Blink-land & Firefox (yup) */
          user-select: all; /* Someday */

    }

    #results {
    }

    #results-geojson {

    }


    .compass {
      fill: none;
      display:none;
    }
</style>

</head>
<body>
    <div id="myMap"></div>
<!--     <textarea readonly="false" id="lede" placeholder="Paste addresses or names here, one per line.
466 Geary St, SF, CA
1600 Pennsylvania Ave
Tenderloin
nob hill
DC
mt everest
El Dorado
Atlantis
Valhalla"></textarea>
oakland, ca
san francisco, ca
millbrae, ca
835 hampshire st, san francisco
555 20th st, san francisco
3730 20th st, san francisco
baker beach, san francisco
great hwy & lincoln way, san francisco
stinson beach, ca
san mateo, ca
redwood city, ca
palo alto, ca
san jose, ca
san anselmo, ca
mill valley, ca
lafayette, ca
berkeley, ca
santa rosa, ca
sonoma, ca
fremont, ca
castro valley, ca

 -->


        <!--
        Todo:
        * separate functions ll2jsonSimpleFeature & ll2json (one for geojson, other for map points)
        * map tiles & credits
        * geojson beautify & "get geojson"
        * pipe-delim width
        * labels
        -->

    <textarea id="lede" placeholder="Paste addresses or names here, one per line. Results below.">
    </textarea>

    <div id="btn_group">
        <button class="btn" id="go_geocode">GO!</button>

        <p>
        <div>
            <label>
                <input type="checkbox" id="viewbox">
                <span class="smalllabel">
                    Within<br/>view
                </span>
            </label>
        </div>

        <div>
            <label>
                <input type="checkbox" id="show_imagery" checked="checked">
                <span class="smalllabel">
                    Aerial
                </span>
            </label>
        </div>
        </p>
    </div>

    <div id="bottom">
        <div id="results" placeholder="results" class="cls-results">
        </div><!--  newline hack
         --><div id="results-geojson" placeholder="results" class="cls-results">
            <button id="get-geojson">Get GeoJSON</button>
        </div>
    </div>


    <script src='jquery-1.11.0.min.js' type="text/javascript"></script>
    <!-- <script src='https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js' type="text/javascript"></script> -->
    <script src='bootstrap.min.js' type="text/javascript"></script>

<script>

var A = {};
A.gjfc = { "type": "FeatureCollection", "features": [] };
A.locations = [];
var my_key = "key-2d5eacd8b924489c8ed5e8418bd883bc";
var my_mapquest_key = "dhADqDA6plsQVFuHfPvX2Xb3GrFiCjl5";
var my_mapzen_search_key = "search-Qih_r38";
var my_bing_key = "AkV9x501-ckTlIjc80g4zwUPU0kR_k9_lbn2aJF6e576ro6LY9mfDWS7mRbzKzRH";

var us = [ // reverse of NESW
    {lon: -124.85, lat: 24.40}, // west, south
    {lon: -66.88, lat: 49.38} // east, north
];
var home = [
    {lon: -130, lat: 20},
    {lon: -60, lat: 55}
];

var result_fields = ['name','county','country','label','layer','confidence'];
var result_fields_nominatim = ['lat','lon','display_name','class','type','importance'];
var LINE_COUNT = 0, BUNDLE_SIZE = 6;

var intr = mapsense.interact();
var arro = mapsense.arrow();

var map = mapsense.map('#myMap') // init the map
    .extent(home) // zoom to bounds, regardless of window size
    .tileSize({x:256,y:256})
    /*.add(
        mapsense.basemap().apiKey(my_key).style("parchment")
    )*/
    ;

var credit = '<a target="_blank" href="https://developer.mapsense.co/tileViewer/?tileset=mapsense.earth">©Mapsense ©OpenStreetMap</a> <a target="_blank" href="http://stamen.com">Stamen Design</a>';
credit += '<br/>Nominatim Search Courtesy of <a href="http://www.mapquest.com/" target="_blank">MapQuest</a> <img src="http://developer.mapquest.com/content/osm/mq_logo.png">';
credit += '<br/>Imagery <a href="http://msdn.microsoft.com/en-us/library/ff701716.aspx" target="_blank">bing</a> <img src="http://dev.virtualearth.net/Branding/logo_powered_by.png">';
d3.select('.mapsense-attribution').html(credit);

map.interact(false);
map.add(mapsense.drag());
map.add(mapsense.wheel());
map.add(mapsense.dblclick());
map.add(mapsense.touch());
mapsense.compass().map(map); //enable shift zoom


var max_extents = [
    {lon: 180, lat: 90}, // opposites, because we'll expand out
    {lon: -180, lat: -90}
];

// satellite_url = "http://{S}.mqcdn.com/tiles/1.0.0/sat/{Z}/{X}/{Y}.jpg"; // Credit http://developer.mapquest.com/web/products/open/map
/*
labels_url = "http://stamen-tiles-{S}.a.ssl.fastly.net/toner-labels/{Z}/{X}/{Y}.png";

labels_layer = mapsense.image()
    .url(mapsense.url(labels_url)
    .hosts(["a", "b", "c", "d"]))
    ;
map.add(labels_layer.visible(true).id("labels_layer"));
d3.select("#labels_layer").attr("style","opacity: 0.5;");
*/

function getGeoJSON(){
    d3.select('#get-geojson')
        .on('click', function() {
            // d3.select('#results-geojson')
            d3.select('#results')
                .text(JSON.stringify(A.gjfc))
                ;
        })
}

function geocode(location, bbox){
    // Get lat/lon and bbox of search term, thanks to nominatim & mapquest.
    //var geocode_url = "http://nominatim.openstreetmap.org/search?q=" + location + "&limit=1&format=json";
    //var geocode_url = "http://open.mapquestapi.com/nominatim/v1/search.php?q=" + location + "&limit=1&format=json";
    //var geocode_url = "http://www.mapquestapi.com/geocoding/v1/address?key=" + my_mapquest_key + "?location=" + location + "&limit=1&format=json";
    var geocode_url = "https://search.mapzen.com/v1/search?api_key=" + my_mapzen_search_key + "&text=" + location + "&size=1";

    //geocode_url += '&accept-language=en,en-US,en-GB,es';

    if (bbox) {
        // left, top, right, bottom
        // nominatim: geocode_url += '&viewbox=' + map.extent()[0].lon +','+ map.extent()[1].lat +','+ map.extent()[1].lon +','+ map.extent()[0].lat;
        geocode_url += '&boundary.rect.min_lon=' + map.extent()[0].lon +'&boundary.rect.max_lat='+ map.extent()[1].lat +'&boundary.rect.max_lon='+ map.extent()[1].lon +'&boundary.rect.min_lat='+ map.extent()[0].lat;
    }

    getResult(location, geocode_url);

}

function getResult(loc,geocode_url) {

    $.ajax({
        dataType: "json",
        url: geocode_url,
        success: function(json) {
            printResult(json, loc);
        }
    });
}

function printResult(data, location) {
    var lat, lon, gj_polygon, jsonbb, bbox, gj, bbox_km;
    var previous_text, new_text, result_line, result_values;

    console.log(data);
    console.log(data.features[0].geometry.coordinates[1]);

    if (data) {

        if (data.features && data.features[0].geometry.coordinates) {
            lat = data.features[0].geometry.coordinates[1];
            lon = data.features[0].geometry.coordinates[0];
            gj = ll2jsonSimpleFeature(lat, lon, location);
            A.gjfc.features.push(gj);

            A.locations.push({
              'location': location,
              'lat': lat,
              'lon': lon,
              'label': data.features[0].properties.label || '',
            });

            //if ( pt_layer && pt_layer.visible() ) { map.remove(pt_layer); }

            var another_pt_layer = mapsense.geoJson()
                .features(gj.features)
                .selection(function(d){
                    d.attr("class", "point_highlight")
                    .attr("r", "10")
                    ;
                });
            map.add(another_pt_layer);


            previous_text = d3.select('#results').html();
            result_values = [ data.features[0].geometry.coordinates[1], data.features[0].geometry.coordinates[0]  ];
            for (var i = 0; i < result_fields.length; i++) {
                result_values.push( data.features[0].properties[result_fields[i]] );
            }
            result_line = "<br/>" + location + '|' + result_values.join('|');

            new_text = previous_text + result_line;
            d3.select('#results').html(new_text);

        }

        /*if (data.bbox) {
            jsonbb = data.bbox;
            bbox = [
                {lon: jsonbb[2], lat: jsonbb[0]},
                {lon: jsonbb[3], lat: jsonbb[1]}
            ];


            // If the size of the bbox is small, only zoom to 13ish
            // Diagonal distance across bbox
            bbox_km = llll2km(jsonbb[0],jsonbb[2],jsonbb[1],jsonbb[3]);

            if (LINE_COUNT == 1) {
                if (bbox_km > 10) {
                    map.extent(bbox);
                } else {
                    map.center({lon: lon, lat: lat})
                    .zoom(14);
                }
            } else {
                updateMaxBbox(lat,lon);
            }

        }*/

   } else {
        //alert("No results found.");
        //d3.select('#results').text("Not found: " + location);
        previous_text = d3.select('#results').html();
        new_text = previous_text + "<br>Not found: " + location;
        d3.select('#results').html(new_text);
   }
}
/*
function printResultNominatim(data, location) {
    var lat, lon, gj_polygon, jsonbb, bbox, gj, bbox_km;
    var previous_text, new_text, result_line, result_values;
    if (data[0]) {

        if (data[0].lat && data[0].lon) {
            lat = data[0].lat;
            lon = data[0].lon;
            gj = ll2json(lat,lon,"your place");

            //if ( pt_layer && pt_layer.visible() ) { map.remove(pt_layer); }

            var another_pt_layer = mapsense.geoJson()
                .features(gj.features)
                .selection(function(d){
                    d.attr("class", "point_highlight")
                    .attr("r", "10")
                    ;
                });
            map.add(another_pt_layer);


            previous_text = d3.select('#results').html();
            result_values = [];
            for (var i = 0; i < result_fields.length; i++) {
                result_values.push( data[0][result_fields[i]] );
            }
            result_line = "<br/>" + location + '|' + result_values.join('|');

            new_text = previous_text + result_line;
            d3.select('#results').html(new_text);

        }

        if (data[0].boundingbox) {
            jsonbb = data[0].boundingbox;
            bbox = [
                {lon: jsonbb[2], lat: jsonbb[0]},
                {lon: jsonbb[3], lat: jsonbb[1]}
            ];


            // If the size of the bbox is small, only zoom to 13ish
            // Diagonal distance across bbox
            bbox_km = llll2km(jsonbb[0],jsonbb[2],jsonbb[1],jsonbb[3]);

            if (LINE_COUNT == 1) {
                if (bbox_km > 10) {
                    map.extent(bbox);
                } else {
                    map.center({lon: lon, lat: lat})
                    .zoom(14);
                }
            } else {
                updateMaxBbox(lat,lon);
            }

        }

   } else {
        //alert("No results found.");
        //d3.select('#results').text("Not found: " + location);
        previous_text = d3.select('#results').html();
        new_text = previous_text + "<br>Not found: " + location;
        d3.select('#results').html(new_text);
   }
}
*/
function zoomBounds(e) {
    /*map.extent(bounds(e.features)).zoomBy(-.1);*/
    map.extent(bounds(e.features)).zoom(14);
}

function ll2json(lat,lon,name){
    var gj = {type: "FeatureCollection", features: []}; //init a geojson object

    var feature = {
        type: "Feature",
        geometry: {type: "Point", "coordinates": [ +lon, +lat ]},
        properties: {
            name: name
        }
    };

    gj.features.push(feature);

    return gj;
}

function ll2jsonSimpleFeature(lat,lon,name){
    var feature = {
        type: "Feature",
        geometry: {type: "Point", "coordinates": [ +lon, +lat ]},
        properties: {
            name: name
        }
    };
    return feature;
}

function llll2km(lat1,lon1,lat2,lon2) {
  var R = 6371; // Radius of the earth in km
  var dLat = deg2rad(lat2-lat1);  // deg2rad below
  var dLon = deg2rad(lon2-lon1);
  var a =
    Math.sin(dLat/2) * Math.sin(dLat/2) +
    Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) *
    Math.sin(dLon/2) * Math.sin(dLon/2)
    ;
  var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
  var d = R * c; // Distance in km
  return d;
}

function deg2rad(deg) {
  return deg * (Math.PI/180);
}

$(document).ready(function(){
    $("#results").click(function() {
        selectText("results");
    });

    $("#go_geocode").click(function(e) {
        var headline = 'INPUT|latitude|longitude|' + result_fields.join('|');
        d3.select('#results').html(headline);

        var lines = $('#lede').val() ||  $('#lede').attr("placeholder");
        lines = lines.split(/\n/);
        LINE_COUNT = lines.length;

        var bbox = false;
        if(document.getElementById('viewbox').checked) {
            bbox = true;
        } else {
            bbox = false;
        }

        for (var i = 0; i < lines.length; i++) {
            //latlon = geocode( lines[i], bbox );
            //latlon = geocode_delayer( i, lines[i], bbox );
            setTimeout(function(x) {
                return function() {
                    geocode(lines[x], bbox);
                };
            }(i), 167*i);

        }
    });

    d3.select('#show_imagery').on("click",function() {
        if ( document.getElementById('show_imagery').checked ) {
            imagery_layer.visible(true);
        } else {
            imagery_layer.visible(false);
        }
    });

});


function geocode_delayer(i, query, bbox) {
    setTimeout(function() {
        geocode(query, bbox);
        console.log(query)
    }, 1677); // 6 per second = .167s
}


//--selectText grabs the full contents of a given container on click.
function selectText(containerid) {
    var range;
    if (document.selection) {
        range = document.body.createTextRange();
        range.moveToElementText(document.getElementById(containerid));
        range.select();
    } else if (window.getSelection) {
        range = document.createRange();
        range.selectNode(document.getElementById(containerid));
        window.getSelection().addRange(range);
    }
}


function updateMaxBbox(y,x) {
        y = parseFloat(y);
        x = parseFloat(x);
        if ( x < max_extents[0].lon ) { // more west than max west?
            max_extents[0].lon = x;
        }
        if ( x > max_extents[1].lon ) { // more east than max east?
            max_extents[1].lon = x;
        }
        if ( y < max_extents[0].lat ) { // more south than max south?
            max_extents[0].lat = y;
        }
        if ( y > max_extents[1].lat ) { // more north than max north?
            max_extents[1].lat = y;
        }

        map.extent(max_extents).zoomBy(-0.5);
        /*
        max_extents = [
            {lon: 180, lat: 90},  // west, south
            {lon: -180, lat: -90} //east, north
        ];
        */
}


/*
Returns a Bing URL template given a string and a list of subdomains.
http://polymaps.org/ex/bing.html#16.00/37.6672/-122.4979
*/
function bingTemplate(url, subdomains) {
  var n = subdomains.length,
      salt = ~~(Math.random() * n); // per-session salt

  /** Returns the given coordinate formatted as a 'quadkey'. */
  function quad(column, row, zoom) {
    var key = "";
    for (var i = 1; i <= zoom; i++) {
      key += (((row >> zoom - i) & 1) << 1) | ((column >> zoom - i) & 1);
    }
    return key;
  }

  return function(c) {
    var quadKey = quad(c.column, c.row, c.zoom),
        server = Math.abs(salt + c.column + c.row + c.zoom) % n;
    return url
        .replace("{quadkey}", quadKey)
        .replace("{subdomain}", subdomains[server]);
  };
}

function bingCallback(data) {
  /* Display each resource as an image layer. */
  var resourceSets = data.resourceSets;
  for (var i = 0; i < resourceSets.length; i++) {
    var resources = data.resourceSets[i].resources;
    for (var j = 0; j < resources.length; j++) {
      var resource = resources[j];
      /*map.add(po.image()
          .url(template(resource.imageUrl, resource.imageUrlSubdomains)))
          .tileSize({x: resource.imageWidth, y: resource.imageHeight});
      */

        imagery_layer = mapsense.image()
            // .url(mapsense.url(satellite_url)
            .url(mapsense.url( bingTemplate(resource.imageUrl, resource.imageUrlSubdomains) ))
            //.hosts(["otile1", "otile2", "otile3", "otile4"]))
            //.tileSize({x: resource.imageWidth, y: resource.imageHeight})
            ;
        map.add(imagery_layer.visible(true).id("imagery_layer"));
    }
  }

}


/*TODO:
labels
satellite
*/


</script>

<script src="http://dev.virtualearth.net/REST/V1/Imagery/Metadata/AerialWithLabels?key=AmT-ZC3HPevQq5IBJ7v8qiDUxrojNaqbW1zBsKF0oMNEs53p7Nk5RlAuAmwSG7bg&jsonp=bingCallback" charset="utf-8"></script>


</body>
</html>

jquery-1.11.0.min.js

/*! jQuery v1.11.0 | (c) 2005, 2014 jQuery Foundation, Inc. | jquery.org/license */
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mapsense.css

.mapsense-attribution {
  background-color: rgba(0, 0, 0, 0.5);
  color: #ccc;
  position: absolute;
  bottom: 0;
  right: 0;
  padding: 10px;
  font-size: 11px;
  font-family: sans-serif;
  line-height: 5px;
  text-decoration: none;
}
.mapsense-attribution a {
  color: #ccc;
  text-decoration: none;
}
.compass .back {
  fill: #eee;
  fill-opacity: .8;
}
.compass .fore {
  stroke: #999;
  stroke-width: 1.5px;
}
.compass rect.back.fore {
  fill: #999;
  fill-opacity: .3;
  stroke: #eee;
  stroke-width: 1px;
  shape-rendering: crispEdges;
}
.compass .direction {
  fill: none;
}
.compass .chevron {
  fill: none;
  stroke: #999;
  stroke-width: 5px;
}
.compass .zoom .chevron {
  stroke-width: 4px;
}
.compass .active .chevron,
.compass .chevron.active {
  stroke: #fff;
}
.compass.active .active .direction {
  fill: #999;
}
path {
  vector-effect: non-scaling-stroke;
  stroke-linejoin: round;
  stroke-linecap: round;
}
/* zoom-dependent styling for roads & admins */
/* general rules */
path._undefined.none {
  fill: none;
}
path.landuse.other {
  fill: none;
  stroke: none;
}
.park {
  opacity: .3;
}
.water_line {
  opacity: .5;
  fill: none;
}
.runway {
  opacity: .7;
}
.rail_major,
.rail_minor {
  stroke-dasharray: 4, 3;
}
.roads,
.admin {
  fill: none;
}
.disputed_border,
.state_border {
  stroke-dasharray: 8, 3;
}
/* admins */
.country_border {
  stroke-width: 2;
}
.admin._3,
.admin._2,
.admin._1 {
  stroke-width: 1;
}
.admin._4 {
  stroke-width: 1.5;
}
.state_border._2 {
  stroke-width: .3;
}
.state_border._3,
.state_border._4 {
  stroke-width: .5;
}
.state_border._8,
.state_border._9,
.state_border._10,
.state_border._11 {
  stroke-width: 1.5;
  opacity: .75;
}
.state_border._12,
.state_border._13,
.state_border._14,
.state_border._15,
.state_border._16,
.state_border._17 {
  stroke-width: 2;
  stroke-dasharray: 10, 4;
  opacity: .75;
}
/* roads */
.ne_10m_roads._3 {
  stroke-width: 0.5;
}
.ne_10m_roads._4,
.ne_10m_roads._5 {
  stroke-width: 0.75;
}
.ne_10m_roads._6 {
  opacity: 0.75;
}
.motorway._6 {
  stroke-width: .75;
}
.motorway._7,
.ne_10m_roads._7 {
  stroke-width: 1;
}
.arterial_major._7 {
  stroke-width: .5;
}
/* zoom 8 */
.ne_10m_roads._8 {
  stroke-width: 1.25;
  opacity: 0.75;
}
.motorway._8 {
  stroke-width: 1.25;
  opacity: 0.75;
}
.arterial_major._8 {
  stroke-width: .5;
  opacity: .75;
}
.arterial_minor._8 {
  stroke-width: 0.5;
  opacity: .5;
}
/* zoom 9 */
.motorway._9 {
  stroke-width: 1.5;
}
.arterial_major._9 {
  stroke-width: .75;
}
.arterial_minor._9 {
  stroke-width: 0.5;
  opacity: .5;
}
/* zoom 10 */
.motorway._10 {
  stroke-width: 1.75;
}
.arterial_major._10 {
  stroke-width: 1.25;
}
.arterial_minor._10 {
  stroke-width: 1;
}
.road_med._10 {
  stroke-width: .75;
}
/* zoom 11 */
.motorway._11 {
  stroke-width: 3;
}
.arterial_major._11,
.runway._11 {
  stroke-width: 1.75;
}
.arterial_minor._11 {
  stroke-width: 1.25;
}
.road_med._11 {
  stroke-width: 1;
}
.road_minor._11 {
  stroke-width: .5;
}
/* zoom 12 */
.motorway._12 {
  stroke-width: 3.5;
}
.arterial_major._12,
.runway._12 {
  stroke-width: 2;
}
.arterial_minor._12 {
  stroke-width: 1.5;
}
.road_med._12 {
  stroke-width: 1;
}
.road_minor._12 {
  stroke-width: .75;
}
/* zoom 13 */
.motorway._13 {
  stroke-width: 5;
}
.arterial_major._13,
.runway._13 {
  stroke-width: 3.5;
}
.arterial_minor._13 {
  stroke-width: 2.5;
}
.road_med._13 {
  stroke-width: 2;
}
.road_minor._13 {
  stroke-width: 1.5;
}
.path._13,
.water_line._13 {
  stroke-width: 0.3;
}
/* zoom 14 */
.motorway._14 {
  stroke-width: 6.5;
}
.arterial_major._14,
.runway._14 {
  stroke-width: 4.75;
}
.arterial_minor._14 {
  stroke-width: 4.25;
}
.road_med._14 {
  stroke-width: 3.75;
}
.road_minor._14 {
  stroke-width: 2.5;
}
.rail_minor._14 {
  stroke-width: 1;
}
.rail_major._14 {
  stroke-width: 1.5;
}
.path._14,
.water_line._14 {
  stroke-width: 0.75;
}
/* zoom 15 */
.motorway._15 {
  stroke-width: 8.5;
}
.arterial_major._15,
.runway._15 {
  stroke-width: 7;
}
.arterial_minor._15 {
  stroke-width: 6;
}
.road_med._15 {
  stroke-width: 5;
}
.road_minor._15 {
  stroke-width: 4;
}
.rail_minor._15 {
  stroke-width: 1.5;
}
.rail_major._15 {
  stroke-width: 1.5;
}
.path._15,
.water_line._15 {
  stroke-width: 1;
}
/* zoom 16 */
.motorway._16 {
  stroke-width: 12;
}
.arterial_major._16,
.runway._16 {
  stroke-width: 9;
}
.arterial_minor._16 {
  stroke-width: 8;
}
.road_med._16 {
  stroke-width: 7;
}
.road_minor._16 {
  stroke-width: 6;
}
.rail_minor._16 {
  stroke-width: 1.5;
}
.rail_major._16 {
  stroke-width: 2;
}
.path._16,
.water_line._16 {
  stroke-width: 2;
}
/* zoom 17 */
.motorway._17 {
  stroke-width: 15;
}
.arterial_major._17,
.runway._17 {
  stroke-width: 10;
}
.arterial_minor._17 {
  stroke-width: 9;
}
.road_med._17 {
  stroke-width: 8;
}
.road_minor._17 {
  stroke-width: 8;
}
.rail_minor._17 {
  stroke-width: 3;
  stroke-dasharray: 7, 6;
}
.rail_major._17 {
  stroke-width: 4;
  stroke-dasharray: 7, 6;
}
.path._17,
.water_line._17 {
  stroke-width: 5;
}
/* zoom 18 */
.motorway._18 {
  stroke-width: 16;
}
.arterial_major._18,
.runway._18 {
  stroke-width: 10;
}
.arterial_minor._18 {
  stroke-width: 10;
}
.road_med._18 {
  stroke-width: 9;
}
.road_minor._18 {
  stroke-width: 8;
}
.rail_minor._18 {
  stroke-width: 3;
  stroke-dasharray: 7, 6;
}
.rail_major._18 {
  stroke-width: 4;
  stroke-dasharray: 7, 6;
}
.path._18,
.water_line._18 {
  stroke-width: 5;
}
.mapsense-blackprint.labels {
  font-size: 18;
  fill: #999;
  font-weight: 200;
  text-transform: uppercase;
  stroke-width: .3;
  /*stroke: grey;*/
  font-stretch: expanded;
  letter-spacing: 1.5;
  font-family: "Josefin Sans";
}
.mapsense-blackprint.tile-background {
  fill: #141414;
}
.mapsense-blackprint.land {
  fill: #000000;
  stroke: #bdbcbc;
  stroke-width: 1;
}
.mapsense-blackprint.agriculture {
  display: none;
}
.mapsense-blackprint.water_polygon {
  fill: #141414;
}
.mapsense-blackprint.water_line {
  stroke: #323232;
  stroke-width: 1;
  opacity: .3;
  fill: none;
}
.mapsense-blackprint.park {
  fill: rgba(15, 15, 15, 0.3);
  stroke: none;
}
.mapsense-blackprint.building {
  fill: none;
  stroke: #505050;
  stroke-width: .52;
}
.mapsense-blackprint.school {
  fill: #0f0f0f;
  stroke: none;
}
.mapsense-blackprint.other {
  stroke: #323232;
}
.mapsense-blackprint.urban {
  fill: none;
  stroke: none;
}
.mapsense-blackprint.roads {
  stroke: #222;
}
.mapsense-blackprint.motorway,
.mapsense-blackprint.ne_10m_roads {
  stroke: #333;
}
.mapsense-blackprint.country_border,
.mapsense-blackprint.disputed_border {
  stroke: grey;
  stroke-dasharray: 3 3;
  stroke-width: 1;
  fill: none;
}
.mapsense-blackprint.state_border {
  stroke: grey;
  stroke-dasharray: 3 3;
  fill: none;
}
.mapsense-dark.labels {
  font-size: 14;
  fill: #777;
  font-weight: 600;
  text-transform: uppercase;
  stroke-width: .3;
  /*stroke: grey;*/
  font-stretch: expanded;
  letter-spacing: 1.5;
  font-family: "Josefin Sans";
}
.mapsense-dark.tile-background {
  fill: #3a4250;
}
.mapsense-dark.land {
  fill: #161619;
}
.mapsense-dark.agriculture {
  display: none;
}
.mapsense-dark.country_border,
.mapsense-dark.disputed_border {
  stroke: #777;
}
.mapsense-dark.state_border {
  stroke: #777;
}
.mapsense-dark.water_polygon {
  fill: #3a4250;
  stroke: none;
}
.mapsense-dark.water_line {
  stroke: #516283;
  stroke-width: 1;
  fill: none;
}
.mapsense-dark.park {
  fill: #268061;
}
.mapsense-dark.building {
  fill: #222;
  stroke: black;
}
.mapsense-dark.school {
  fill: #35161e;
}
.mapsense-dark.other {
  fill: rgba(76, 69, 67, 0.15);
  stroke: black;
}
.mapsense-dark.urban {
  fill: #000000;
  stroke: none;
}
.mapsense-dark.ne_10m_roads {
  stroke: #7c5c2c;
}
.mapsense-dark.motorway {
  stroke: #7c5c2c;
}
.mapsense-dark.arterial_major {
  stroke: #4a472a;
}
.mapsense-dark.arterial_minor {
  stroke: #3c3c3c;
}
.mapsense-dark.road_med {
  stroke: #3c3c3c;
}
.mapsense-dark.road_minor {
  stroke: #323232;
}
.mapsense-dark.rail_major {
  stroke: #323228;
  fill: none;
}
.mapsense-dark.rail_minor {
  stroke: #323228;
  fill: none;
}
.mapsense-dark.runway {
  stroke: #333;
}
.mapsense-dark.path {
  stroke: #323228;
}
.mapsense-grayscale.labels {
  font-size: 14;
  fill: #777;
  font-weight: 600;
  text-transform: uppercase;
  stroke-width: .3;
  /*stroke: grey;*/
  font-stretch: expanded;
  letter-spacing: 1.5;
  font-family: "Josefin Sans";
}
.mapsense-grayscale.tile-background {
  fill: #aaa9af;
}
.mapsense-grayscale.land {
  fill: #e8e5e5;
  stroke: none;
}
.mapsense-grayscale.water_polygon {
  fill: #aaa9af;
}
.mapsense-grayscale.water_line {
  stroke: gray;
  stroke-width: 1;
}
.mapsense-grayscale.park {
  fill: #cad4ca;
}
.mapsense-grayscale.building {
  fill: #f0f0f0;
}
.mapsense-grayscale.school {
  fill: #dcdcdc;
  stroke: none;
}
.mapsense-grayscale.other {
  fill: #cbcbcb;
  stroke: none;
}
.mapsense-grayscale.urban {
  fill: none;
  stroke: none;
}
.mapsense-grayscale.ne_10m_roads {
  stroke: #ccc;
}
.mapsense-grayscale.motorway {
  stroke: #CCC;
}
.mapsense-grayscale.arterial_major {
  stroke: #d2d2d2;
}
.mapsense-grayscale.arterial_minor {
  stroke: #d7d7d7;
}
.mapsense-grayscale.road_med {
  stroke: #DDD;
}
.mapsense-grayscale.road_minor {
  stroke: #DDD;
}
.mapsense-grayscale.rail_major {
  stroke: lightgray;
}
.mapsense-grayscale.rail_minor {
  stroke: lightgray;
}
.mapsense-grayscale.runway {
  stroke: #f2efef;
}
.mapsense-grayscale.path {
  stroke: #DDD;
}
.mapsense-grayscale.country_border,
.mapsense-grayscale.disputed_border {
  stroke: #BBB;
}
.mapsense-grayscale.state_border {
  stroke: #bbb;
}
.mapsense-light.labels {
  font-size: 14;
  fill: #777;
  font-weight: 600;
  text-transform: uppercase;
  stroke-width: .3;
  /*stroke: grey;*/
  font-stretch: expanded;
  letter-spacing: 1.5;
  font-family: "Josefin Sans";
}
.mapsense-light.tile-background {
  fill: #ffffff;
}
.mapsense-light.land {
  fill: #ddddda;
  stroke: none;
}
.mapsense-light.water_polygon {
  fill: #ffffff;
  stroke: none;
}
.mapsense-light.country_border,
.mapsense-light.disputed_border {
  stroke: #aaa;
}
.mapsense-light.state_border {
  stroke: #aaa;
}
.mapsense-light.water_line {
  stroke: #c8d0df;
}
.mapsense-light.park {
  fill: #caceb9;
  stroke: none;
}
.mapsense-light.building {
  fill: #d7d6d1;
}
.mapsense-light.school {
  fill: #eadddb;
  stroke: none;
}
.mapsense-light.other {
  fill: none;
  stroke: none;
}
.mapsense-light.urban {
  fill: rgba(177, 135, 74, 0.07);
  stroke: none;
}
.mapsense-light.ne_10m_roads {
  stroke: #ededed;
}
.mapsense-light.motorway {
  stroke: #f6f4f3;
}
.mapsense-light.arterial_major {
  stroke: #f4f4ef;
}
.mapsense-light.arterial_minor {
  stroke: #f1eded;
}
.mapsense-light.road_med {
  stroke: #f6f3f3;
}
.mapsense-light.road_minor {
  stroke: #faf8f8;
}
.mapsense-light.rail_major {
  stroke: #cccccc;
}
.mapsense-light.rail_minor {
  stroke: #cccccc;
}
.mapsense-light.runway {
  stroke: #ccc;
}
.mapsense-light.path {
  stroke: #ccc;
}
.mapsense-parchment.labels {
  font-size: 14;
  fill: #777;
  font-weight: 600;
  text-transform: uppercase;
  stroke-width: .3;
  /*stroke: grey;*/
  font-stretch: expanded;
  letter-spacing: 1.5;
  font-family: "Josefin Sans";
}
.mapsense-parchment.tile-background {
  fill: #b8bdc1;
}
.mapsense-parchment.land {
  fill: #e3d6c5;
  stroke: #976f60;
  stroke-width: 1;
}
.mapsense-parchment.water_polygon {
  fill: #b8bdc1;
  stroke: #976f60;
  stroke-width: .5;
}
.mapsense-parchment.water_line {
  stroke: #b8bdc1;
}
.mapsense-parchment.park {
  fill: #cbbca6;
}
.mapsense-parchment.building {
  fill: #d4c9ba;
}
.mapsense-parchment.school {
  fill: rgba(90, 46, 5, 0.12);
  stroke: none;
}
.mapsense-parchment.other {
  fill: #e3d6c5;
  stroke: none;
}
.mapsense-parchment.urban {
  fill: rgba(255, 255, 255, 0.3);
  stroke: none;
}
.mapsense-parchment.ne_10m_roads {
  stroke: #aea295;
}
.mapsense-parchment.motorway {
  stroke: #aea295;
}
.mapsense-parchment.arterial_major {
  stroke: #d5c5b7;
}
.mapsense-parchment.arterial_minor {
  stroke: #cab7aa;
}
.mapsense-parchment.road_med {
  stroke: #d8c8bb;
}
.mapsense-parchment.road_minor {
  stroke: #d8c8bb;
}
.mapsense-parchment.rail_major {
  stroke: #bda897;
}
.mapsense-parchment.rail_minor {
  stroke: #bda897;
}
.mapsense-parchment.runway {
  stroke: #ede5d5;
}
.mapsense-parchment.path {
  stroke: #ede5d5;
}
.mapsense-parchment.country_border,
.mapsense-parchment.disputed_border {
  stroke: #976f60;
}
.mapsense-parchment.state_border {
  stroke: #976f60;
}
.mapsense-sketch.labels {
  font-size: 14;
  fill: #777;
  font-weight: 600;
  text-transform: uppercase;
  stroke-width: .3;
  font-stretch: expanded;
  letter-spacing: 1.5;
  font-family: "Josefin Sans";
}
.mapsense-sketch.tile-background {
  fill: #f0f0f0;
}
.mapsense-sketch.land {
  fill: #ffffff;
  stroke: #bdbcbc;
  stroke-width: 1;
}
.mapsense-sketch.water_polygon {
  fill: #f0f0f0;
  stroke: #bdbcbc;
  stroke-width: .5;
}
.mapsense-sketch.water_line {
  stroke: #cccaca;
}
.mapsense-sketch.park {
  fill: none;
  stroke-width: .55;
  stroke: #dad8d8;
}
.mapsense-sketch.building {
  fill: none;
  stroke: #d4d4d4;
  stroke-width: .52;
}
.mapsense-sketch.school {
  fill: none;
  stroke: #dadada;
}
.mapsense-sketch.urban {
  fill: none;
  stroke: none;
}
.mapsense-sketch.ne_10m_roads {
  stroke: #eee;
}
.mapsense-sketch.motorway {
  stroke: #ddd;
}
.mapsense-sketch.arterial_major {
  stroke: #eee;
}
.mapsense-sketch.arterial_minor {
  stroke: #eee;
}
.mapsense-sketch.road_med {
  stroke: #eee;
}
.mapsense-sketch.road_minor {
  stroke: #f5f5f5;
}
.mapsense-sketch.rail_major {
  stroke: #ddd;
}
.mapsense-sketch.rail_minor {
  stroke: #ddd;
}
.mapsense-sketch.runway {
  stroke: #ddd;
}
.mapsense-sketch.path {
  stroke: #f5f5f5;
}
.mapsense-sketch.country_border,
.mapsense-sketch.disputed_border {
  stroke: #ccc;
}
.mapsense-sketch.state_border {
  stroke: #ccc;
}
.mapsense-tron.labels {
  font-size: 14;
  fill: #888;
  font-weight: 600;
  text-transform: uppercase;
  stroke-width: .3;
  font-stretch: expanded;
  letter-spacing: 1.5;
  font-family: "Josefin Sans";
}
.mapsense-tron.tile-background {
  fill: #000000;
}
.mapsense-tron.land {
  fill: #172c3a;
  stroke: none;
}
.mapsense-tron.water_polygon {
  stroke: none;
  fill: black;
}
.mapsense-tron.country_border,
.mapsense-tron.disputed_border {
  stroke: #666;
}
.mapsense-tron.state_border {
  stroke: #666;
}
.mapsense-tron.water_line {
  stroke: #111119;
}
.mapsense-tron.park {
  fill: #060a10;
}
.mapsense-tron.building {
  fill: #07212a;
  stroke: none;
}
.mapsense-tron.school {
  fill: #162532;
  stroke: none;
}
.mapsense-tron.other {
  fill: #11242d;
  stroke: none;
}
.mapsense-tron.urban {
  fill: none;
  stroke: none;
}
.mapsense-tron.ne_10m_roads {
  stroke: #36606f;
}
.mapsense-tron.motorway {
  stroke: #36606f;
}
.mapsense-tron.arterial_major {
  stroke: #295563;
}
.mapsense-tron.arterial_minor {
  stroke: #295563;
}
.mapsense-tron.road_med {
  stroke: #2b3e49;
}
.mapsense-tron.road_minor {
  stroke: #1b333a;
}
.mapsense-tron.rail_major {
  stroke: #1b333a;
}
.mapsense-tron.rail_minor {
  stroke: #1b333a;
}
.mapsense-tron.runway {
  stroke: #1e414c;
}
.mapsense-tron.path {
  stroke: #1b333a;
}
.mapsense-vintage.labels {
  font-size: 16;
  fill: #4c83b2;
  font-weight: 400;
  text-transform: uppercase;
  stroke-width: .3;
  stroke: grey;
  font-stretch: expanded;
  letter-spacing: 1.5;
  font-family: "Josefin Sans";
}
.mapsense-vintage.tile-background {
  fill: #87c8ca;
}
.mapsense-vintage.land {
  fill: #fffaf2;
}
.mapsense-vintage.water_polygon {
  fill: #87c8ca;
}
.mapsense-vintage.country_border,
.mapsense-vintage.disputed_border {
  stroke: #aaa;
}
.mapsense-vintage.state_border {
  stroke: #aaa;
}
.mapsense-vintage.water_line {
  stroke: #b5e2e4;
}
.mapsense-vintage.park {
  fill: #c6f3bd;
  stroke: none;
}
.mapsense-vintage.building {
  fill: #f9ece2;
  stroke: none;
}
.mapsense-vintage.school {
  fill: #f0eced;
  stroke: none;
}
.mapsense-vintage.urban {
  fill: rgba(243, 210, 191, 0.19);
  stroke: none;
}
.mapsense-vintage.ne_10m_roads {
  stroke: #ffb67e;
}
.mapsense-vintage.motorway {
  stroke: #f6bd86;
}
.mapsense-vintage.arterial_major {
  stroke: #c2d7df;
}
.mapsense-vintage.arterial_minor {
  stroke: #cfdddb;
}
.mapsense-vintage.road_med {
  stroke: #dae9ea;
}
.mapsense-vintage.road_minor {
  stroke: #ededed;
}
.mapsense-vintage.rail_major {
  stroke: #c7c4c4;
}
.mapsense-vintage.rail_minor {
  stroke: #c7c4c4;
}
.mapsense-vintage.runway {
  stroke: #e1dede;
}
.mapsense-vintage.path {
  stroke: #e1dede;
}
.mapsense-simple.labels {
  font-size: 14;
  fill: #777;
  font-weight: 600;
  text-transform: uppercase;
  stroke-width: .3;
  font-stretch: expanded;
  letter-spacing: 1.5;
  font-family: "Josefin Sans";
}
.mapsense-simple.tile-background {
  fill: #CBE6F3;
}
.mapsense-simple.land {
  fill: #ffffff;
  stroke: #a2d3f2;
  stroke-width: 1;
}
.mapsense-simple.water_polygon {
  fill: #CBE6F3;
  stroke: #b6d3e0;
  stroke-width: 0.5px;
}
.mapsense-simple.water_line {
  stroke: #a2d3f2;
}
.mapsense-simple.park {
  fill: none;
  stroke-width: 0;
  stroke: #dad8d8;
}
.mapsense-simple.landuse {
  fill: none;
  stroke: none;
}
.mapsense-simple.building {
  fill: none;
  stroke: #d4d4d4;
  stroke-width: .52;
}
.mapsense-simple.school {
  fill: none;
  stroke: none;
}
.mapsense-simple.other {
  fill: none;
  stroke: none;
}
.mapsense-simple.urban {
  fill: none;
  stroke: none;
}
.mapsense-simple.ne_10m_roads {
  stroke: #eee;
}
.mapsense-simple.motorway {
  stroke: #ddd;
}
.mapsense-simple.arterial_major {
  stroke: #eee;
}
.mapsense-simple.arterial_minor {
  stroke: #eee;
}
.mapsense-simple.road_med {
  stroke: #eee;
}
.mapsense-simple.road_minor {
  stroke: #f5f5f5;
}
.mapsense-simple.rail_major {
  stroke: #ddd;
}
.mapsense-simple.rail_minor {
  stroke: #ddd;
}
.mapsense-simple.runway {
  stroke: #ddd;
}
.mapsense-simple.path {
  stroke: #f5f5f5;
}
.mapsense-simple.country_border,
.mapsense-simple.disputed_border {
  stroke: #ccc;
}
.mapsense-simple.state_border {
  stroke: #ccc;
}
.mapsense-simple.ne_10m_roads._3 {
  stroke-width: 0.5;
  stroke: none;
}
.mapsense-simple.ne_10m_roads._4,
.mapsense-simple.ne_10m_roads._5 {
  stroke-width: 0.75;
  stroke: none;
}
.mapsense-simple.ne_10m_roads._6 {
  opacity: 0.75;
  stroke: none;
}
svg.mapsense-map {
  width: 100%;
  height: 100%;
}

mapsense.js

(function(){
  var mapsense = {version: "1.0.0"},
      ms = mapsense;

  var zero = {x: 0, y: 0};
ms.ns = {
  svg: "http://www.w3.org/2000/svg",
  xlink: "http://www.w3.org/1999/xlink"
};

function ns(name) {
  var i = name.indexOf(":");
  return i < 0 ? name : {
    space: ms.ns[name.substring(0, i)],
    local: name.substring(i + 1)
  };
}
ms.id = (function() {
  var id = 0;
  return function() {
    return ++id;
  };
})();
ms.svg = function(type) {
  return document.createElementNS(ms.ns.svg, type);
};
ms.transform = function(a, b, c, d, e, f) {
  var transform = {},
      zoomDelta,
      zoomFraction,
      k;

  if (!arguments.length) {
    a = 1; c = 0; e = 0;
    b = 0; d = 1; f = 0;
  }

  transform.zoomFraction = function(x) {
    if (!arguments.length) return zoomFraction;
    zoomFraction = x;
    zoomDelta = Math.floor(zoomFraction + Math.log(Math.sqrt(a * a + b * b + c * c + d * d)) / Math.LN2);
    k = Math.pow(2, -zoomDelta);
    return transform;
  };

  transform.apply = function(x) {
    var k0 = Math.pow(2, -x.zoom),
        k1 = Math.pow(2, x.zoom - zoomDelta);
    return {
      column: (a * x.column * k0 + c * x.row * k0 + e) * k1,
      row: (b * x.column * k0 + d * x.row * k0 + f) * k1,
      zoom: x.zoom - zoomDelta
    };
  };

  transform.unapply = function(x) {
    var k0 = Math.pow(2, -x.zoom),
        k1 = Math.pow(2, x.zoom + zoomDelta);
    return {
      column: (x.column * k0 * d - x.row * k0 * c - e * d + f * c) / (a * d - b * c) * k1,
      row: (x.column * k0 * b - x.row * k0 * a - e * b + f * a) / (c * b - d * a) * k1,
      zoom: x.zoom + zoomDelta
    };
  };

  transform.toString = function() {
    return "matrix(" + [a * k, b * k, c * k, d * k].join(" ") + " 0 0)";
  };

  return transform.zoomFraction(0);
};
ms.cache = function(load, unload) {
  var cache = {},
      locks = {},
      map = {},
      head = null,
      tail = null,
      size = 64,
      n = 0;

  function remove(tile) {
    n--;
    if (unload) unload(tile);
    delete map[tile.key];
    if (tile.next) tile.next.prev = tile.prev;
    else if (tail = tile.prev) tail.next = null;
    if (tile.prev) tile.prev.next = tile.next;
    else if (head = tile.next) head.prev = null;
  }

  function flush() {
    for (var tile = tail; n > size; tile = tile.prev) {
      if (!tile) break;
      if (tile.lock) continue;
      remove(tile);
    }
  }

  cache.peek = function(c) {
    return map[[c.zoom, c.column, c.row].join("/")];
  };

  cache.load = function(c, projection) {
    var key = [c.zoom, c.column, c.row].join("/"),
        tile = map[key];
    if (tile) {
      if (tile.prev) {
        tile.prev.next = tile.next;
        if (tile.next) tile.next.prev = tile.prev;
        else tail = tile.prev;
        tile.prev = null;
        tile.next = head;
        head.prev = tile;
        head = tile;
      }
      tile.lock = 1;
      locks[key] = tile;
      return tile;
    }
    tile = {
      key: key,
      column: c.column,
      row: c.row,
      zoom: c.zoom,
      next: head,
      prev: null,
      lock: 1
    };
    load.call(null, tile, projection);
    locks[key] = map[key] = tile;
    if (head) head.prev = tile;
    else tail = tile;
    head = tile;
    n++;
    return tile;
  };

  cache.unload = function(key) {
    if (!(key in locks)) return false;
    var tile = locks[key];
    tile.lock = 0;
    delete locks[key];
    if (tile.request && tile.request.abort(false)) remove(tile);
    return tile;
  };

  cache.locks = function() {
    return locks;
  };

  cache.size = function(x) {
    if (!arguments.length) return size;
    size = x;
    flush();
    return cache;
  };

  cache.flush = function() {
    flush();
    return cache;
  };

  cache.clear = function() {
    for (var key in map) {
      var tile = map[key];
      if (tile.request) tile.request.abort(false);
      if (unload) unload(map[key]);
      if (tile.lock) {
        tile.lock = 0;
        tile.element.parentNode.removeChild(tile.element);
      }
    }
    locks = {};
    map = {};
    head = tail = null;
    n = 0;
    return cache;
  };

  return cache;
};
ms.url = function(template) {
  var hosts = [],
      repeat = true;

  function format(c) {
    var max = c.zoom < 0 ? 1 : 1 << c.zoom,
        column = c.column;
    if (repeat) {
      column = c.column % max;
      if (column < 0) column += max;
    } else if ((column < 0) || (column >= max)) {
      return null;
    }
    return (typeof template === "function" ? template(c) : template).replace(/{(.)}/g, function(s, v) {
      switch (v) {
        case "S": return hosts[(Math.abs(c.zoom) + c.row + column) % hosts.length];
        case "Z": return c.zoom;
        case "X": return column;
        case "Y": return c.row;
        case "B": {
          var nw = ms.map.coordinateLocation({row: c.row, column: column, zoom: c.zoom}),
              se = ms.map.coordinateLocation({row: c.row + 1, column: column + 1, zoom: c.zoom}),
              pn = Math.ceil(Math.log(c.zoom) / Math.LN2);
          return se.lat.toFixed(pn) +
              "," + nw.lon.toFixed(pn) +
              "," + nw.lat.toFixed(pn) +
              "," + se.lon.toFixed(pn);
        }
      }
      return v;
    });
  }

  format.template = function(x) {
    if (!arguments.length) return template;
    template = x;
    return format;
  };

  format.hosts = function(x) {
    if (!arguments.length) return hosts;
    hosts = x;
    return format;
  };

  format.repeat = function(x) {
    if (!arguments.length) return repeat;
    repeat = x;
    return format;
  };

  return format;
};
ms.dispatch = function(that) {
  var types = {};

  that.on = function(type, handler) {
    var listeners = types[type] || (types[type] = []);
    for (var i = 0; i < listeners.length; i++) {
      if (listeners[i].handler == handler) return that; // already registered
    }
    listeners.push({handler: handler, on: true});
    return that;
  };

  that.off = function(type, handler) {
    var listeners = types[type];
    if (listeners) for (var i = 0; i < listeners.length; i++) {
      var l = listeners[i];
      if (l.handler == handler) {
        l.on = false;
        listeners.splice(i, 1);
        break;
      }
    }
    return that;
  };

  return function(event) {
    var listeners = types[event.type];
    if (!listeners) return;
    listeners = listeners.slice(); // defensive copy
    for (var i = 0; i < listeners.length; i++) {
      var l = listeners[i];
      if (l.on) l.handler.call(that, event);
    }
  };
};
ms.queue = (function() {
  var queued = [], active = 0, size = 6;

  function process() {
    if ((active >= size) || !queued.length) return;
    active++;
    queued.pop()();
  }

  function dequeue(send) {
    for (var i = 0; i < queued.length; i++) {
      if (queued[i] == send) {
        queued.splice(i, 1);
        return true;
      }
    }
    return false;
  }

  function merge(dest, src) {
    for (var property in src) {
      dest[property] = src[property];
    }
    return dest;
  }

  function request(url, callback, options) {
    var req;

    function send() {
      req = new XMLHttpRequest();
      req.open("GET", url, true);
      if (options) {
        if (options.mimeType && req.overrideMimeType)
          req.overrideMimeType(options.mimeType);
        if (options.responseType)
          req.responseType = options.responseType;
        if (options.xhrFields) {
          for (var f in options.xhrFields) {
            req[f] = options.xhrFields[f];
          }
        }
      }
      req.onreadystatechange = function(e) {
        if (req.readyState == 4) {
          active--;
          if (req.status < 300) callback(req);
          process();
        }
      };
      req.send(null);
    }

    function abort(hard) {
      if (dequeue(send)) return true;
      if (hard && req) { req.abort(); return true; }
      return false;
    }

    queued.push(send);
    process();
    return {abort: abort};
  }

  function text(url, callback, mimeType) {
    return request(url, function(req) {
      if (req.responseText) callback(req.responseText);
    }, { mimeType: mimeType });
  }

  /*
   * We the override MIME type here so that you can load local files; some
   * browsers don't assign a proper MIME type for local files.
   */

  function json(url, callback, options) {
    return request(url, function(req) {
      if (req.responseText) callback(JSON.parse(req.responseText));
    }, merge({ mimeType: "application/json" }, options));
  }

  function xml(url, callback, options) {
    return request(url, function(req) {
      if (req.responseXML) callback(req.responseXML);
    }, merge({ mimeType: "application/xml" }, options));
  }

  function octetStream(url, callback, options) {
    var defaultOptions = {
      mimeType: "application/octet-stream",
      responseType: "arraybuffer"
    };
    return request(url, function(req) {
      if (req.response) callback(req.response);
    }, merge(defaultOptions, options));
  }

  function image(imageElement, src, callback) {
    var img;

    function send() {
      img = document.createElement("img");
      img.onerror = function() {
        active--;
        process();
      };
      img.onload = function() {
        active--;
        callback(img);
        process();
      };
      img.src = src;
      imageElement.setAttributeNS(ms.ns.xlink, "href", src);
    }

    function abort(hard) {
      if (dequeue(send)) return true;
      if (hard && img) { img.src = "about:"; return true; } // cancels request
      return false;
    }

    queued.push(send);
    process();
    return {abort: abort};
  }

  return {
    text: text,
    xml: xml,
    json: json,
    octetStream: octetStream,
    image: image
  };
})();
ms.map = function(mapContainer) {
  var map = {},
      container,
      size,
      sizeActual = zero,
      sizeRadius = zero, // sizeActual / 2
      tileSize = {x: 512, y: 512},
      center = {lat: 37.76487, lon: -122.41948},
      zoom = 12,
      zoomFraction = 0,
      zoomFactor = 1, // Math.pow(2, zoomFraction)
      zoomRange = [1, 18],
      angle = 0,
      angleCos = 1, // Math.cos(angle)
      angleSin = 0, // Math.sin(angle)
      angleCosi = 1, // Math.cos(-angle)
      angleSini = 0, // Math.sin(-angle)
      ymin = -180, // lat2y(centerRange[0].lat)
      ymax = 180; // lat2y(centerRange[1].lat)

  var centerRange = [
    {lat: y2lat(ymin), lon: -Infinity},
    {lat: y2lat(ymax), lon: Infinity}
  ];

  var interact = ms.interact();

  if (typeof mapContainer === "string")
    container = document.querySelector(mapContainer);
  else
    container = mapContainer;

  if (!container)
    throw new Error("Invalid map container.");

  map.interact = function(x) {
    if (!arguments.length) return interact;
    interact.map(x ? map : null);
  };

  map.locationCoordinate = function(l) {
    var c = ms.map.locationCoordinate(l),
        k = Math.pow(2, zoom);
    c.column *= k;
    c.row *= k;
    c.zoom += zoom;
    return c;
  };

  map.coordinateLocation = ms.map.coordinateLocation;

  map.coordinatePoint = function(tileCenter, c) {
    var kc = Math.pow(2, zoom - c.zoom),
        kt = Math.pow(2, zoom - tileCenter.zoom),
        dx = (c.column * kc - tileCenter.column * kt) * tileSize.x * zoomFactor,
        dy = (c.row * kc - tileCenter.row * kt) * tileSize.y * zoomFactor;
    return {
      x: sizeRadius.x + angleCos * dx - angleSin * dy,
      y: sizeRadius.y + angleSin * dx + angleCos * dy
    };
  };

  map.pointCoordinate = function(tileCenter, p) {
    var kt = Math.pow(2, zoom - tileCenter.zoom),
        dx = (p.x - sizeRadius.x) / zoomFactor,
        dy = (p.y - sizeRadius.y) / zoomFactor;
    return {
      column: tileCenter.column * kt + (angleCosi * dx - angleSini * dy) / tileSize.x,
      row: tileCenter.row * kt + (angleSini * dx + angleCosi * dy) / tileSize.y,
      zoom: zoom
    };
  };

  map.locationPoint = function(l) {
    var k = Math.pow(2, zoom + zoomFraction - 3) / 45,
        dx = (l.lon - center.lon) * k * tileSize.x,
        dy = (lat2y(center.lat) - lat2y(l.lat)) * k * tileSize.y;
    return {
      x: sizeRadius.x + angleCos * dx - angleSin * dy,
      y: sizeRadius.y + angleSin * dx + angleCos * dy
    };
  };

  map.pointLocation = function(p) {
    var k = 45 / Math.pow(2, zoom + zoomFraction - 3),
        dx = (p.x - sizeRadius.x) * k,
        dy = (p.y - sizeRadius.y) * k;
    return {
      lon: center.lon + (angleCosi * dx - angleSini * dy) / tileSize.x,
      lat: y2lat(lat2y(center.lat) - (angleSini * dx + angleCosi * dy) / tileSize.y)
    };
  };

  function rezoom() {
    if (zoomRange) {
      if (zoom < zoomRange[0]) zoom = zoomRange[0];
      else if (zoom > zoomRange[1]) zoom = zoomRange[1];
    }
    zoomFraction = zoom - (zoom = Math.round(zoom));
    zoomFactor = Math.pow(2, zoomFraction);
  }

  function recenter() {
    if (!centerRange) return;
    var k = 45 / Math.pow(2, zoom + zoomFraction - 3);

    // constrain latitude
    var y = Math.max(Math.abs(angleSin * sizeRadius.x + angleCos * sizeRadius.y),
                     Math.abs(angleSini * sizeRadius.x + angleCosi * sizeRadius.y)),
        lat0 = y2lat(ymin - y * k / tileSize.y),
        lat1 = y2lat(ymax + y * k / tileSize.y);
    center.lat = Math.max(lat0, Math.min(lat1, center.lat));

    // constrain longitude
    var x = Math.max(Math.abs(angleSin * sizeRadius.y + angleCos * sizeRadius.x),
                     Math.abs(angleSini * sizeRadius.y + angleCosi * sizeRadius.x)),
        lon0 = centerRange[0].lon - x * k / tileSize.x,
        lon1 = centerRange[1].lon + x * k / tileSize.x;
    center.lon = Math.max(lon0, Math.min(lon1, center.lon));
 }

  // a place to capture mouse events if no tiles exist
  var rect = ms.svg("rect");
  rect.setAttribute("visibility", "hidden");
  rect.setAttribute("pointer-events", "all");

  var svgContainer = ms.svg("svg");
  svgContainer.setAttribute("class", "mapsense-map");
  svgContainer.appendChild(rect);

  var relativeContainer = document.createElement("div");
  relativeContainer.style.setProperty("position", "relative");
  relativeContainer.style.setProperty("width", "100%");
  relativeContainer.style.setProperty("height", "100%");

  relativeContainer.appendChild(svgContainer);
  container.appendChild(relativeContainer);

  map.container = function() {
    return container;
  };

  map.relativeContainer = function() {
    return relativeContainer;
  };

  map.svgContainer = function() {
    return svgContainer;
  };

  map.focusableParent = function() {
    for (var p = container; p; p = p.parentNode) {
      if (p.tabIndex >= 0) return p;
    }
    return window;
  };

  map.mouse = function(e) {
    var point = (svgContainer.ownerSVGElement || svgContainer).createSVGPoint();
    if ((bug44083 < 0) && (window.scrollX || window.scrollY)) {
      var svg = document.body.appendChild(ms.svg("svg"));
      svg.style.position = "absolute";
      svg.style.top = svg.style.left = "0px";
      var ctm = svg.getScreenCTM();
      bug44083 = !(ctm.f || ctm.e);
      document.body.removeChild(svg);
    }
    if (bug44083) {
      point.x = e.pageX;
      point.y = e.pageY;
    } else {
      point.x = e.clientX;
      point.y = e.clientY;
    }
    return point.matrixTransform(svgContainer.getScreenCTM().inverse());
  };

  map.size = function(x) {
    if (!arguments.length) return sizeActual;
    size = x;
    return map.resize(); // size tiles
  };

  map.resize = function() {
    if (!size) {
      rect.setAttribute("width", "100%");
      rect.setAttribute("height", "100%");
      var b = rect.getBBox();
      sizeActual = {x: b.width, y: b.height};
      resizer.add(map);
    } else {
      sizeActual = size;
      resizer.remove(map);
    }
    rect.setAttribute("width", sizeActual.x);
    rect.setAttribute("height", sizeActual.y);
    sizeRadius = {x: sizeActual.x / 2, y: sizeActual.y / 2};
    recenter();
    map.dispatch({type: "resize"});
    return map;
  };

  map.tileSize = function(x) {
    if (!arguments.length) return tileSize;
    tileSize = x;
    map.dispatch({type: "move"});
    return map;
  };

  map.center = function(x) {
    if (!arguments.length) return center;
    center = x;
    recenter();
    map.dispatch({type: "move"});
    return map;
  };

  map.panBy = function(x) {
    var k = 45 / Math.pow(2, zoom + zoomFraction - 3),
        dx = x.x * k,
        dy = x.y * k;
    return map.center({
      lon: center.lon + (angleSini * dy - angleCosi * dx) / tileSize.x,
      lat: y2lat(lat2y(center.lat) + (angleSini * dx + angleCosi * dy) / tileSize.y)
    });
  };

  map.centerRange = function(x) {
    if (!arguments.length) return centerRange;
    centerRange = x;
    if (centerRange) {
      ymin = centerRange[0].lat > -90 ? lat2y(centerRange[0].lat) : -Infinity;
      ymax = centerRange[0].lat < 90 ? lat2y(centerRange[1].lat) : Infinity;
    } else {
      ymin = -Infinity;
      ymax = Infinity;
    }
    recenter();
    map.dispatch({type: "move"});
    return map;
  };

  map.zoom = function(x) {
    if (!arguments.length) return zoom + zoomFraction;
    zoom = x;
    rezoom();
    return map.center(center);
  };

  map.zoomBy = function(z, x0, l) {
    if (arguments.length < 2) return map.zoom(zoom + zoomFraction + z);

    // compute the location of x0
    if (arguments.length < 3) l = map.pointLocation(x0);

    // update the zoom level
    zoom = zoom + zoomFraction + z;
    rezoom();

    // compute the new point of the location
    var x1 = map.locationPoint(l);

    return map.panBy({x: x0.x - x1.x, y: x0.y - x1.y});
  };

  map.zoomRange = function(x) {
    if (!arguments.length) return zoomRange;
    zoomRange = x;
    return map.zoom(zoom + zoomFraction);
  };

  map.extent = function(x) {
    if (!arguments.length) return [
      map.pointLocation({x: 0, y: sizeActual.y}),
      map.pointLocation({x: sizeActual.x, y: 0})
    ];

    // compute the extent in points, scale factor, and center
    var bl = map.locationPoint(x[0]),
        tr = map.locationPoint(x[1]),
        k = Math.max((tr.x - bl.x) / sizeActual.x, (bl.y - tr.y) / sizeActual.y),
        l = map.pointLocation({x: (bl.x + tr.x) / 2, y: (bl.y + tr.y) / 2});

    // update the zoom level
    zoom = zoom + zoomFraction - Math.log(k) / Math.LN2;
    rezoom();

    // set the new center
    return map.center(l);
  };

  map.angle = function(x) {
    if (!arguments.length) return angle;
    angle = x;
    angleCos = Math.cos(angle);
    angleSin = Math.sin(angle);
    angleCosi = Math.cos(-angle);
    angleSini = Math.sin(-angle);
    recenter();
    map.dispatch({type: "move"});
    return map;
  };

  map.add = function(x) {
    x.map(map);
    return map;
  };

  map.remove = function(x) {
    x.map(null);
    return map;
  };

  map.dispatch = ms.dispatch(map);

  map.interact(true);
  return map.resize(); // infer size
};

function resizer(e) {
  for (var i = 0; i < resizer.maps.length; i++) {
    resizer.maps[i].resize();
  }
}

resizer.maps = [];

resizer.add = function(map) {
  for (var i = 0; i < resizer.maps.length; i++) {
    if (resizer.maps[i] == map) return;
  }
  resizer.maps.push(map);
};

resizer.remove = function(map) {
  for (var i = 0; i < resizer.maps.length; i++) {
    if (resizer.maps[i] == map) {
      resizer.maps.splice(i, 1);
      return;
    }
  }
};

// Note: assumes single window (no frames, iframes, etc.)!
if (window.addEventListener) {
  window.addEventListener("resize", resizer, false);
  window.addEventListener("load", resizer, false);
}

// See http://wiki.openstreetmap.org/wiki/Mercator

function y2lat(y) {
  return 360 / Math.PI * Math.atan(Math.exp(y * Math.PI / 180)) - 90;
}

function lat2y(lat) {
  return 180 / Math.PI * Math.log(Math.tan(Math.PI / 4 + lat * Math.PI / 360));
}

ms.map.locationCoordinate = function(l) {
  var k = 1 / 360;
  return {
    column: (l.lon + 180) * k,
    row: (180 - lat2y(l.lat)) * k,
    zoom: 0
  };
};

ms.map.coordinateLocation = function(c) {
  var k = 45 / Math.pow(2, c.zoom - 3);
  return {
    lon: k * c.column - 180,
    lat: y2lat(180 - k * c.row)
  };
};

// https://bugs.webkit.org/show_bug.cgi?id=44083
var bug44083 = /WebKit/.test(navigator.userAgent) ? -1 : 0;
ms.layer = function(load, unload) {
  var layer = {},
      cache = layer.cache = ms.cache(load, unload).size(512),
      tile = true,
      visible = true,
      zoom,
      id,
      map,
      container = ms.svg("g"),
      transform,
      levelZoom,
      levels = {};

  container.setAttribute("class", "layer");
  for (var i = -4; i <= -1; i++) levels[i] = container.appendChild(ms.svg("g"));
  for (var i = 2; i >= 1; i--) levels[i] = container.appendChild(ms.svg("g"));
  levels[0] = container.appendChild(ms.svg("g"));

  function zoomIn(z) {
    var end = levels[0].nextSibling;
    for (; levelZoom < z; levelZoom++) {
      // -4, -3, -2, -1, +2, +1, =0 // current order
      // -3, -2, -1, +2, +1, =0, -4 // insertBefore(-4, end)
      // -3, -2, -1, +1, =0, -4, +2 // insertBefore(+2, end)
      // -3, -2, -1, =0, -4, +2, +1 // insertBefore(+1, end)
      // -4, -3, -2, -1, +2, +1, =0 // relabel
      container.insertBefore(levels[-4], end);
      container.insertBefore(levels[2], end);
      container.insertBefore(levels[1], end);
      var t = levels[-4];
      for (var dz = -4; dz < 2;) levels[dz] = levels[++dz];
      levels[dz] = t;
    }
  }

  function zoomOut(z) {
    var end = levels[0].nextSibling;
    for (; levelZoom > z; levelZoom--) {
      // -4, -3, -2, -1, +2, +1, =0 // current order
      // -4, -3, -2, +2, +1, =0, -1 // insertBefore(-1, end)
      // +2, -4, -3, -2, +1, =0, -1 // insertBefore(+2, -4)
      // -4, -3, -2, -1, +2, +1, =0 // relabel
      container.insertBefore(levels[-1], end);
      container.insertBefore(levels[2], levels[-4]);
      var t = levels[2];
      for (var dz = 2; dz > -4;) levels[dz] = levels[--dz];
      levels[dz] = t;
    }
  }

  function move() {
    var map = layer.map(), // in case the layer is removed
        mapZoom = map.zoom(),
        mapZoomFraction = mapZoom - (mapZoom = Math.round(mapZoom)),
        mapSize = map.size(),
        mapAngle = map.angle(),
        tileSize = map.tileSize(),
        tileCenter = map.locationCoordinate(map.center());

    // set the layer zoom levels
    if (levelZoom != mapZoom) {
      if (levelZoom < mapZoom) zoomIn(mapZoom);
      else if (levelZoom > mapZoom) zoomOut(mapZoom);
      else levelZoom = mapZoom;
      for (var z = -4; z <= 2; z++) {
        var l = levels[z];
        l.setAttribute("class", "zoom" + (z < 0 ? "" : "+") + z + " zoom" + (mapZoom + z));
        l.setAttribute("transform", "scale(" + Math.pow(2, -z) + ")");
      }
    }

    // get the coordinates of the four corners
    var c0 = map.pointCoordinate(tileCenter, zero),
        c1 = map.pointCoordinate(tileCenter, {x: mapSize.x, y: 0}),
        c2 = map.pointCoordinate(tileCenter, mapSize),
        c3 = map.pointCoordinate(tileCenter, {x: 0, y: mapSize.y});

    var col = tileCenter.column, row = tileCenter.row;
    tileCenter.column = Math.round((Math.round(tileSize.x * tileCenter.column) + (mapSize.x & 1) / 2) / tileSize.x);
    tileCenter.row = Math.round((Math.round(tileSize.y * tileCenter.row) + (mapSize.y & 1) / 2) / tileSize.y);
    col -= tileCenter.column;
    row -= tileCenter.row;

    // set the layer transform
    var roundedZoomFraction = roundZoom(Math.pow(2, mapZoomFraction));
    container.setAttribute("transform",
        "translate(" +
          Math.round(mapSize.x / 2 - col * tileSize.x * roundedZoomFraction) +
          "," +
          Math.round(mapSize.y / 2 - row * tileSize.y * roundedZoomFraction) +
        ")" +
        (mapAngle ? "rotate(" + mapAngle / Math.PI * 180 + ")" : "") +
        (mapZoomFraction ? "scale(" + roundedZoomFraction + ")" : "") +
        (transform ? transform.zoomFraction(mapZoomFraction) : ""));

    // layer-specific coordinate transform
    if (transform) {
      c0 = transform.unapply(c0);
      c1 = transform.unapply(c1);
      c2 = transform.unapply(c2);
      c3 = transform.unapply(c3);
      tileCenter = transform.unapply(tileCenter);
    }

    // layer-specific zoom transform
    var tileLevel = zoom ? zoom(c0.zoom) - c0.zoom : 0;
    if (tileLevel) {
      var k = Math.pow(2, tileLevel);
      c0.column *= k; c0.row *= k;
      c1.column *= k; c1.row *= k;
      c2.column *= k; c2.row *= k;
      c3.column *= k; c3.row *= k;
      c0.zoom = c1.zoom = c2.zoom = c3.zoom += tileLevel;
    }

    // tile-specific projection
    function projection(c) {
      var zoom = c.zoom,
          max = zoom < 0 ? 1 : 1 << zoom,
          column = c.column % max,
          row = c.row;
      if (column < 0) column += max;
      return {
        locationPoint: function(l) {
          var c = ms.map.locationCoordinate(l),
              k = Math.pow(2, zoom - c.zoom);
          return {
            x: tileSize.x * (k * c.column - column),
            y: tileSize.y * (k * c.row - row)
          };
        }
      };
    }

    // record which tiles are visible
    var oldLocks = cache.locks(), newLocks = {};

    // reset the proxy counts
    for (var key in oldLocks) {
      oldLocks[key].proxyCount = 0;
    }

    // load the tiles!
    if (visible && tileLevel > -5 && tileLevel < 3) {
      var ymax = c0.zoom < 0 ? 1 : 1 << c0.zoom;
      if (tile) {
        scanTriangle(c0, c1, c2, 0, ymax, scanLine);
        scanTriangle(c2, c3, c0, 0, ymax, scanLine);
      } else {
        var x = Math.floor((c0.column + c2.column) / 2),
            y = Math.max(0, Math.min(ymax - 1, Math.floor((c1.row + c3.row) / 2))),
            z = Math.min(4, c0.zoom);
        x = x >> z << z;
        y = y >> z << z;
        scanLine(x, x + 1, y);
      }
    }

    // scan-line conversion
    function scanLine(x0, x1, y) {
      var z = c0.zoom,
          z0 = 2 - tileLevel,
          z1 = 4 + tileLevel;

      for (var x = x0; x < x1; x++) {
        var t = cache.load({column: x, row: y, zoom: z}, projection);
        if (!t.ready && !(t.key in newLocks)) {
          t.proxyRefs = {};
          var c, full, proxy;

          // downsample high-resolution tiles
          for (var dz = 1; dz <= z0; dz++) {
            full = true;
            for (var dy = 0, k = 1 << dz; dy <= k; dy++) {
              for (var dx = 0; dx <= k; dx++) {
                proxy = cache.peek(c = {
                  column: (x << dz) + dx,
                  row: (y << dz) + dy,
                  zoom: z + dz
                });
                if (proxy && proxy.ready) {
                  newLocks[proxy.key] = cache.load(c);
                  proxy.proxyCount++;
                  t.proxyRefs[proxy.key] = proxy;
                } else {
                  full = false;
                }
              }
            }
            if (full) break;
          }

          // upsample low-resolution tiles
          if (!full) {
            for (var dz = 1; dz <= z1; dz++) {
              proxy = cache.peek(c = {
                column: x >> dz,
                row: y >> dz,
                zoom: z - dz
              });
              if (proxy && proxy.ready) {
                newLocks[proxy.key] = cache.load(c);
                proxy.proxyCount++;
                t.proxyRefs[proxy.key] = proxy;
                break;
              }
            }
          }
        }
        newLocks[t.key] = t;
      }
    }

    function roundZoom(z) {
      return Math.round(z * 256) / 256;
    }

    // position tiles
    for (var key in newLocks) {
      var t = newLocks[key],
          k = roundZoom(Math.pow(2, t.level = t.zoom - tileCenter.zoom));
      var transform = "translate(" +
        Math.round(t.x = tileSize.x * (t.column - tileCenter.column * k)) + "px" + "," +
        Math.round(t.y = tileSize.y * (t.row - tileCenter.row * k)) + "px" + ")";
      d3.select(t.element).style("transform", transform);
      d3.select(t.element).style("-webkit-transform", transform);
      d3.select(t.element).style("-ms-transform", transform);
    }

    // remove tiles that are no longer visible
    for (var key in oldLocks) {
      if (!(key in newLocks)) {
        var t = cache.unload(key);
        t.element.parentNode.removeChild(t.element);
        delete t.proxyRefs;
      }
    }

    // append tiles that are now visible
    for (var key in newLocks) {
      var t = newLocks[key];
      if (t.element.parentNode != levels[t.level]) {
        levels[t.level].appendChild(t.element);
        if (layer.show) layer.show(t);
      }
    }

    // flush the cache, clearing no-longer-needed tiles
    cache.flush();

    // dispatch the move event
    layer.dispatch({type: "move"});
  }

  // remove proxy tiles when tiles load
  function cleanup(e) {
    if (e.tile.proxyRefs) {
      for (var proxyKey in e.tile.proxyRefs) {
        var proxyTile = e.tile.proxyRefs[proxyKey];
        if ((--proxyTile.proxyCount <= 0) && cache.unload(proxyKey)) {
          proxyTile.element.parentNode.removeChild(proxyTile.element);
        }
      }
      delete e.tile.proxyRefs;
    }
  }

  layer.map = function(x) {
    if (!arguments.length) return map;
    if (map) {
      if (map == x) {
        container.parentNode.appendChild(container); // move to end
        return layer;
      }
      map.off("move", move).off("resize", move);
      container.parentNode.removeChild(container);
    }
    map = x;
    if (map) {
      map.svgContainer().appendChild(container);
      if (layer.init) layer.init(container);
      map.on("move", move).on("resize", move);
      move();
    }
    return layer;
  };

  layer.container = function() {
    return container;
  };

  layer.levels = function() {
    return levels;
  };

  layer.id = function(x) {
    if (!arguments.length) return id;
    id = x;
    container.setAttribute("id", x);
    return layer;
  };

  layer.visible = function(x) {
    if (!arguments.length) return visible;
    if (visible = x) container.removeAttribute("visibility");
    else container.setAttribute("visibility", "hidden");
    if (map) move();
    return layer;
  };

  layer.transform = function(x) {
    if (!arguments.length) return transform;
    transform = x;
    if (map) move();
    return layer;
  };

  layer.zoom = function(x) {
    if (!arguments.length) return zoom;
    zoom = typeof x == "function" || x == null ? x : function() { return x; };
    if (map) move();
    return layer;
  };

  layer.tile = function(x) {
    if (!arguments.length) return tile;
    tile = x;
    if (map) move();
    return layer;
  };

  layer.reload = function() {
    cache.clear();
    if (map) move();
    return layer;
  };

  layer.dispatch = ms.dispatch(layer);
  layer.on("load", cleanup);

  return layer;
};

// scan-line conversion
function edge(a, b) {
  if (a.row > b.row) { var t = a; a = b; b = t; }
  return {
    x0: a.column,
    y0: a.row,
    x1: b.column,
    y1: b.row,
    dx: b.column - a.column,
    dy: b.row - a.row
  };
}

// scan-line conversion
function scanSpans(e0, e1, ymin, ymax, scanLine) {
  var y0 = Math.max(ymin, Math.floor(e1.y0)),
      y1 = Math.min(ymax, Math.ceil(e1.y1));

  // sort edges by x-coordinate
  if ((e0.x0 == e1.x0 && e0.y0 == e1.y0) ?
      (e0.x0 + e1.dy / e0.dy * e0.dx < e1.x1) :
      (e0.x1 - e1.dy / e0.dy * e0.dx < e1.x0)) {
    var t = e0; e0 = e1; e1 = t;
  }

  // scan lines!
  var m0 = e0.dx / e0.dy,
      m1 = e1.dx / e1.dy,
      d0 = e0.dx > 0, // use y + 1 to compute x0
      d1 = e1.dx < 0; // use y + 1 to compute x1
  for (var y = y0; y < y1; y++) {
    var x0 = m0 * Math.max(0, Math.min(e0.dy, y + d0 - e0.y0)) + e0.x0,
        x1 = m1 * Math.max(0, Math.min(e1.dy, y + d1 - e1.y0)) + e1.x0;
    scanLine(Math.floor(x1), Math.ceil(x0), y);
  }
}

// scan-line conversion
function scanTriangle(a, b, c, ymin, ymax, scanLine) {
  var ab = edge(a, b),
      bc = edge(b, c),
      ca = edge(c, a);

  // sort edges by y-length
  if (ab.dy > bc.dy) { var t = ab; ab = bc; bc = t; }
  if (ab.dy > ca.dy) { var t = ab; ab = ca; ca = t; }
  if (bc.dy > ca.dy) { var t = bc; bc = ca; ca = t; }

  // scan span! scan span!
  if (ab.dy) scanSpans(ca, ab, ymin, ymax, scanLine);
  if (bc.dy) scanSpans(ca, bc, ymin, ymax, scanLine);
}
ms.image = function() {
  var image = ms.layer(load, unload),
      url;

  function load(tile) {
    var element = tile.element = ms.svg("image"), size = image.map().tileSize();
    element.setAttribute("preserveAspectRatio", "none");
    element.setAttribute("width", size.x);
    element.setAttribute("height", size.y);

    if (typeof url == "function") {
      element.setAttribute("opacity", 0);
      var tileUrl = url(tile);
      if (tileUrl != null) {
        tile.request = ms.queue.image(element, tileUrl, function(img) {
          delete tile.request;
          tile.ready = true;
          tile.img = img;
          element.removeAttribute("opacity");
          image.dispatch({type: "load", tile: tile});
        });
      } else {
        tile.ready = true;
        image.dispatch({type: "load", tile: tile});
      }
    } else {
      tile.ready = true;
      if (url != null) element.setAttributeNS(ms.ns.xlink, "href", url);
      image.dispatch({type: "load", tile: tile});
    }
  }

  function unload(tile) {
    if (tile.request) tile.request.abort(true);
  }

  image.url = function(x) {
    if (!arguments.length) return url;
    url = typeof x == "string" && /{.}/.test(x) ? ms.url(x) : x;
    return image.reload();
  };

  return image;
};
ms.geoJson = function(fetch) {
  var geoJson = ms.layer(load, unload),
      container = geoJson.container(),
      url,
      clip = false,
      clipId = "org.polymaps." + ms.id(),
      clipHref = "url(#" + clipId + ")",
      clipPath = container.insertBefore(ms.svg("clipPath"), container.firstChild),
      clipRect = clipPath.appendChild(ms.svg("rect")),
      scale = "fixed",
      zoom = null,
      pointRadius = 4.5,
      features,
      tileBackground = false,
      transformData,
      key = (function() {
        var k = 0;
        return function(f) {
          k = k + 1 | 0;
          return k;
        };
      })(),
      selection,
      dataGeneration = 0,
      selectionGeneration = 0;

  container.setAttribute("fill-rule", "evenodd");
  clipPath.setAttribute("id", clipId);

  if (!arguments.length) fetch = ms.queue.json;

  function projection(proj) {
    var l = {lat: 0, lon: 0};
    return function(coordinates, c) {
      l.lat = coordinates[1];
      l.lon = coordinates[0];
      var p = proj(l);
      c.x = p.x;
      c.y = p.y;
      return p;
    };
  }

  function rescale(o, e, k) {
    var g = o.geometry;
    return g.type in rescales && rescales[g.type](o, e, k);
  }

  var rescales = {

    Point: function (o, e, k) {
      e.setAttribute("transform", "translate(" + o.x + "," + o.y + ")" + k);
    },

    MultiPoint: function (o, e, k) {
      e.setAttribute("transform", "translate(" + o.x + "," + o.y + ")" + k);
    }

  };

  // Create path projecting WGS84 spherical Mercator coordinates.
  function projectSpherical(tileProj) {
    return d3.geo.path().projection({
      stream: function(stream) {
        return {
          point: function(x, y) {
            // Latitudes at the poles (or beyond!) result in unrenderable NaN's and Infinities.
            var epsilon = 1.0e-6;
            y = Math.min(90 - epsilon, y);
            y = Math.max(-90 + epsilon, y);
            var p = tileProj.locationPoint({ lon: x, lat: y });
            stream.point(Math.round(2 * p.x) / 2, Math.round(2 * p.y) / 2);
          },
          sphere: function() { stream.sphere(); },
          lineStart: function() { stream.lineStart(); },
          lineEnd: function() { stream.lineEnd(); },
          polygonStart: function() { stream.polygonStart(); },
          polygonEnd: function() { stream.polygonEnd(); }
        };
      }
    });
  }

  function load(tile, proj) {
    var g = tile.element = ms.svg("g");

    tile.proj = proj(tile);
    tile.fetched = [];
    tile.features = [];
    tile.draw = function() {
      draw(g, tile);
    };

    function update(data) {
      if (geoJson.tile() && tileBackground) {
        var tileSize = geoJson.map().tileSize();
        d3.select(g.insertBefore(ms.svg("rect"), g.firstChild))
          .attr("width", tileSize.x)
          .attr("height", tileSize.x)
          .attr("class", "tile-background");
      }

      tile.fetched = data.features;
      tile.draw();

      tile.ready = true;
      geoJson.dispatch({type: "load", tile: tile, features: tile.features});
    }

    if (url != null) {
      tile.request = fetch(typeof url == "function" ? url(tile) : url, update);
    } else {
      update({type: "FeatureCollection", features: features || []});
    }
  }

  function copyObject(source) {
    var copy = {};
    for (var property in source) {
      copy[property] = source[property];
    }
    return copy;
  }

  function projectPoint(p, proj) {
    proj(p.geometry.coordinates, p);
    return p;
  }

  function projectPointsForMultiPoint(mp, proj) {
    var length = mp.geometry.coordinates.length;
    var points = [];
    for (var i = 0; i < length; i++) {
      var p = copyObject(mp);
      proj(p.geometry.coordinates[i], p);
      points.push(p);
    }
    return points;
  }

  function draw(g, tile) {
    var proj = projection(tile.proj.locationPoint),
        path = projectSpherical(tile.proj),
        pathFeatures = [],
        pointFeatures = [],
        features = transformData ? transformData(tile.fetched, tile) : tile.fetched,
        updated = [];

    features.forEach(function(f) {
      if (f.geometry.type === "Point")
        pointFeatures.push(projectPoint(f, proj));
      else if (f.geometry.type === "MultiPoint")
        pointFeatures.push.apply(pointFeatures, projectPointsForMultiPoint(f, proj));
      else
        pathFeatures.push(f);
    });

    var pathUpdate = d3.select(g)
      .selectAll("path")
      .data(pathFeatures, key);

    pathUpdate.enter()
      .append("path")
      .attr("d", function(f) { return path(f); });

    pathUpdate.exit().remove();

    pathUpdate.each(function(f) { updated.push({ element: this, data: f }); });

    var initialScale = "";
    if (scale == "fixed") {
      initialScale = "scale(" + Math.pow(2, tile.zoom - (tile.scale = geoJson.map().zoom())) + ")";
    }

    var pointUpdate = d3.select(g)
      .selectAll("circle")
      .data(pointFeatures, key);

    pointUpdate.enter()
      .append("circle")
      .attr("transform", function(f) {
        return "translate(" + f.x + "," + f.y + ")" + initialScale;
      })
      .attr("r", pointRadius);

    pointUpdate.exit().remove();

    pointUpdate.each(function(f) { updated.push({ element: this, data: f }); });

    if (selection) {
      pathUpdate.push.apply(pathUpdate, pointUpdate);
      selection(pathUpdate);
    }

    tile.features = updated;
    tile.dataGeneration = dataGeneration;
    tile.selectionGeneration = selectionGeneration;
  }

  function unload(tile) {
    if (tile.request) tile.request.abort(true);
  }

  function move() {
    var zoom = geoJson.map().zoom(),
        tiles = geoJson.cache.locks(), // visible tiles
        key, // key in locks
        tile, // locks[key]
        features, // tile.features
        i, // current feature index
        n, // current feature count, features.length
        feature, // features[i]
        k; // scale transform
    if (scale == "fixed") {
      for (key in tiles) {
        if ((tile = tiles[key]).scale != zoom) {
          k = "scale(" + Math.pow(2, tile.zoom - zoom) + ")";
          i = -1;
          n = (features = tile.features).length;
          while (++i < n) rescale((feature = features[i]).data, feature.element, k);
          tile.scale = zoom;
        }
      }
    }
  }

  geoJson.tileBackground = function(x) {
    if (!arguments.length) return tileBackground;
    tileBackground = x;
    return geoJson;
  };

  geoJson.selection = function(x) {
    if (!arguments.length) return selection;
    selection = x;
    selectionGeneration = selectionGeneration + 1 | 0;
    return geoJson.reshow();
  };

  geoJson.transformData = function(x) {
    if (!arguments.length) return transformData;
    transformData = x;
    dataGeneration = dataGeneration + 1 | 0;
    return geoJson.reshow();
  };

  geoJson.url = function(x) {
    if (!arguments.length) return url;
    url = typeof x == "string" && /{.}/.test(x) ? ms.url(x) : x;
    if (url != null) features = null;
    if (typeof url == "string") geoJson.tile(false);
    return geoJson.reload();
  };

  geoJson.features = function(x) {
    if (!arguments.length) return features;
    if (features = x) {
      url = null;
      geoJson.tile(false);
    }
    return geoJson.reload();
  };

  geoJson.clip = function(x) {
    if (!arguments.length) return clip;
    if (clip) container.removeChild(clipPath);
    if (clip = x) container.insertBefore(clipPath, container.firstChild);
    var locks = geoJson.cache.locks();
    for (var key in locks) {
      if (clip) locks[key].element.setAttribute("clip-path", clipHref);
      else locks[key].element.removeAttribute("clip-path");
    }
    return geoJson;
  };

  var __tile__ = geoJson.tile;
  geoJson.tile = function(x) {
    if (arguments.length && !x) geoJson.clip(x);
    return __tile__.apply(geoJson, arguments);
  };

  var __map__ = geoJson.map;
  geoJson.map = function(x) {
    if (x && clipRect) {
      var size = x.tileSize();
      clipRect.setAttribute("width", size.x);
      clipRect.setAttribute("height", size.y);
    }
    return __map__.apply(geoJson, arguments);
  };

  geoJson.scale = function(x) {
    if (!arguments.length) return scale;
    if (scale = x) geoJson.on("move", move);
    else geoJson.off("move", move);
    if (geoJson.map()) move();
    return geoJson;
  };

  geoJson.show = function(tile) {
    if (clip) tile.element.setAttribute("clip-path", clipHref);
    else tile.element.removeAttribute("clip-path");
    if (transformData && tile.dataGeneration !== dataGeneration) {
      tile.draw();
    }
    else if (selection && tile.selectionGeneration !== selectionGeneration) {
      var s = d3.select(tile.element).selectAll("path,circle");
      selection(s);
      tile.selectionGeneration = selectionGeneration;
    }
    geoJson.dispatch({type: "show", tile: tile, features: tile.features});
    return geoJson;
  };

  geoJson.reshow = function() {
    var locks = geoJson.cache.locks();
    for (var key in locks) geoJson.show(locks[key]);
    return geoJson;
  };

  return geoJson;
};
ms.topoJson = function(fetch) {
  if (!arguments.length) fetch = ms.queue.json;

  var classify,
      staticTopology;

  function groupFeatures(features) {
    if (!classify)
      return features;

    var classIndices = {};
    var groupedFeatures = [];
    features.forEach(function(f) {
      var c = classify(f);
      var index = classIndices[c];
      if (index === undefined) {
        index = groupedFeatures.push([]) - 1;
        classIndices[c] = index;
      }
      groupedFeatures[index].push(f);
    });

    return groupedFeatures.map(function(g) {
      return {
        type: 'GeometryCollection',
        geometries: g
      };
    });
  }

  var topologyFeatures = function(topology) {
    function convert(topology, object, layer, features) {
      var featureOrCollection = topojson.feature(topology, object),
          layerFeatures;

      if (featureOrCollection.type === "FeatureCollection") {
        layerFeatures = featureOrCollection.features;
      } else {
        layerFeatures = [featureOrCollection];
      }
      layerFeatures.forEach(function(f) {
        f.properties.layer = layer;
      });
      features.push.apply(features, layerFeatures);
    }

    var features = [];
    for (var o in topology.objects) {
      convert(topology, topology.objects[o], o, features);
    }
    features = groupFeatures(features);
    return features;
  };

  var topoToGeo = function(url, callback) {
    return fetch(url, function(topology) {
      callback({
        type: "FeatureCollection",
        features: topologyFeatures(topology)
      });
    });
  };

  var topoJson = ms.geoJson(topoToGeo);

  topoJson.topologyFeatures = function(x) {
    if (!arguments.length) return topologyFeatures;
    topologyFeatures = x;
    return topoJson;
  };

  topoJson.classify = function(x) {
    if (!arguments.length) return classify;
    classify = x;
    return topoJson;
  };

  topoJson.staticTopology = function(x) {
    if (!arguments.length) return staticTopology;
    staticTopology = x;
    return topoJson.features(staticTopology ? topologyFeatures(staticTopology) : null);
  };

  return topoJson;
};
ms.dblclick = function() {
  var dblclick = {},
      zoom = "mouse",
      map,
      container;

  function handle(e) {
    var z = map.zoom();
    if (e.shiftKey) z = Math.ceil(z) - z - 1;
    else z = 1 - z + Math.floor(z);
    if (zoom === "mouse")
      map.zoomBy(z, map.mouse(e));
    else
      map.zoomBy(z);
  }

  dblclick.zoom = function(x) {
    if (!arguments.length) return zoom;
    zoom = x;
    return dblclick;
  };

  dblclick.map = function(x) {
    if (!arguments.length) return map;
    if (map) {
      container.removeEventListener("dblclick", handle, false);
      container = null;
    }
    if (map = x) {
      container = map.container();
      container.addEventListener("dblclick", handle, false);
    }
    return dblclick;
  };

  return dblclick;
};
ms.drag = function() {
  var drag = {},
      map,
      container,
      dragging;

  function mousedown(e) {
    if (e.shiftKey) return;
    dragging = {
      x: e.clientX,
      y: e.clientY
    };
    map.focusableParent().focus();
    e.preventDefault();
    document.body.style.setProperty("cursor", "move", null);
  }

  function mousemove(e) {
    if (!dragging) return;
    map.panBy({x: e.clientX - dragging.x, y: e.clientY - dragging.y});
    dragging.x = e.clientX;
    dragging.y = e.clientY;
  }

  function mouseup(e) {
    if (!dragging) return;
    mousemove(e);
    dragging = null;
    document.body.style.removeProperty("cursor");
  }

  drag.map = function(x) {
    if (!arguments.length) return map;
    if (map) {
      container.removeEventListener("mousedown", mousedown, false);
      container = null;
    }
    if (map = x) {
      container = map.container();
      container.addEventListener("mousedown", mousedown, false);
    }
    return drag;
  };

  window.addEventListener("mousemove", mousemove, false);
  window.addEventListener("mouseup", mouseup, false);

  return drag;
};
ms.wheel = function() {
  var wheel = {},
      timePrev = 0,
      last = 0,
      smooth = true,
      zoom = "mouse",
      location,
      map,
      container;

  function move(e) {
    location = null;
  }

  // mousewheel events are totally broken!
  // https://bugs.webkit.org/show_bug.cgi?id=40441
  // not only that, but Chrome and Safari differ in re. to acceleration!
  var inner = document.createElement("div"),
      outer = document.createElement("div");
  outer.style.visibility = "hidden";
  outer.style.top = "0px";
  outer.style.height = "0px";
  outer.style.width = "0px";
  outer.style.overflowY = "scroll";
  inner.style.height = "2000px";
  outer.appendChild(inner);
  document.body.appendChild(outer);

  function mousewheel(e) {
    var delta = e.wheelDelta || -e.detail,
        point;

    /* Detect the pixels that would be scrolled by this wheel event. */
    if (delta) {
      if (smooth) {
        try {
          outer.scrollTop = 1000;
          outer.dispatchEvent(e);
          delta = 1000 - outer.scrollTop;
        } catch (error) {
          // Derp! Hope for the best?
        }
        delta *= 0.001;
      }

      /* If smooth zooming is disabled, batch events into unit steps. */
      else {
        var timeNow = Date.now();
        if (timeNow - timePrev > 200) {
          delta = delta > 0 ? +1 : -1;
          timePrev = timeNow;
        } else {
          delta = 0;
        }
      }
    }

    if (delta) {
      switch (zoom) {
        case "mouse": {
          point = map.mouse(e);
          if (!location) location = map.pointLocation(point);
          map.off("move", move).zoomBy(delta, point, location).on("move", move);
          break;
        }
        case "location": {
          map.zoomBy(delta, map.locationPoint(location), location);
          break;
        }
        default: { // center
          map.zoomBy(delta);
          break;
        }
      }
    }

    e.preventDefault();
    return false; // for Firefox
  }

  wheel.smooth = function(x) {
    if (!arguments.length) return smooth;
    smooth = x;
    return wheel;
  };

  wheel.zoom = function(x, l) {
    if (!arguments.length) return zoom;
    zoom = x;
    location = l;
    if (map) {
      if (zoom == "mouse") map.on("move", move);
      else map.off("move", move);
    }
    return wheel;
  };

  wheel.map = function(x) {
    if (!arguments.length) return map;
    if (map) {
      container.removeEventListener("mousemove", move, false);
      container.removeEventListener("mousewheel", mousewheel, false);
      container.removeEventListener("MozMousePixelScroll", mousewheel, false);
      container = null;
      map.off("move", move);
    }
    if (map = x) {
      if (zoom == "mouse") map.on("move", move);
      container = map.container();
      container.addEventListener("mousemove", move, false);
      container.addEventListener("mousewheel", mousewheel, false);
      container.addEventListener("MozMousePixelScroll", mousewheel, false);
    }
    return wheel;
  };

  return wheel;
};
ms.arrow = function() {
  var arrow = {},
      key = {left: 0, right: 0, up: 0, down: 0},
      last = 0,
      repeatTimer,
      repeatDelay = 250,
      repeatInterval = 50,
      speed = 16,
      map,
      parent;

  function keydown(e) {
    if (e.ctrlKey || e.altKey || e.metaKey) return;
    var now = Date.now(), dx = 0, dy = 0;
    switch (e.keyCode) {
      case 37: {
        if (!key.left) {
          last = now;
          key.left = 1;
          if (!key.right) dx = speed;
        }
        break;
      }
      case 39: {
        if (!key.right) {
          last = now;
          key.right = 1;
          if (!key.left) dx = -speed;
        }
        break;
      }
      case 38: {
        if (!key.up) {
          last = now;
          key.up = 1;
          if (!key.down) dy = speed;
        }
        break;
      }
      case 40: {
        if (!key.down) {
          last = now;
          key.down = 1;
          if (!key.up) dy = -speed;
        }
        break;
      }
      default: return;
    }
    if (dx || dy) map.panBy({x: dx, y: dy});
    if (!repeatTimer && (key.left | key.right | key.up | key.down)) {
      repeatTimer = setInterval(repeat, repeatInterval);
    }
    e.preventDefault();
  }

  function keyup(e) {
    last = Date.now();
    switch (e.keyCode) {
      case 37: key.left = 0; break;
      case 39: key.right = 0; break;
      case 38: key.up = 0; break;
      case 40: key.down = 0; break;
      default: return;
    }
    if (repeatTimer && !(key.left | key.right | key.up | key.down)) {
      repeatTimer = clearInterval(repeatTimer);
    }
    e.preventDefault();
  }

  function keypress(e) {
    switch (e.charCode) {
      case 45: case 95: map.zoom(Math.ceil(map.zoom()) - 1); break; // - _
      case 43: case 61: map.zoom(Math.floor(map.zoom()) + 1); break; // = +
      default: return;
    }
    e.preventDefault();
  }

  function repeat() {
    if (!map) return;
    if (Date.now() < last + repeatDelay) return;
    var dx = (key.left - key.right) * speed,
        dy = (key.up - key.down) * speed;
    if (dx || dy) map.panBy({x: dx, y: dy});
  }

  arrow.map = function(x) {
    if (!arguments.length) return map;
    if (map) {
      parent.removeEventListener("keypress", keypress, false);
      parent.removeEventListener("keydown", keydown, false);
      parent.removeEventListener("keyup", keyup, false);
      parent = null;
    }
    if (map = x) {
      parent = map.focusableParent();
      parent.addEventListener("keypress", keypress, false);
      parent.addEventListener("keydown", keydown, false);
      parent.addEventListener("keyup", keyup, false);
    }
    return arrow;
  };

  arrow.speed = function(x) {
    if (!arguments.length) return speed;
    speed = x;
    return arrow;
  };

  return arrow;
};
ms.hash = function() {
  var hash = {},
      s0, // cached location.hash
      lat = 90 - 1e-8, // allowable latitude range
      map;

  var parser = function(map, s) {
    var args = s.split("/").map(Number);
    if (args.length < 3 || args.some(isNaN)) return true; // replace bogus hash
    else {
      var size = map.size();
      map.zoomBy(args[0] - map.zoom(),
          {x: size.x / 2, y: size.y / 2},
          {lat: Math.min(lat, Math.max(-lat, args[1])), lon: args[2]});
    }
  };

  var formatter = function(map) {
    var center = map.center(),
        zoom = map.zoom(),
        precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
    return "#" + zoom.toFixed(2) +
             "/" + center.lat.toFixed(precision) +
             "/" + center.lon.toFixed(precision);
  };

  function move() {
    var s1 = formatter(map);
    if (s0 !== s1) location.replace(s0 = s1); // don't recenter the map!
  }

  function hashchange() {
    if (location.hash === s0) return; // ignore spurious hashchange events
    if (parser(map, (s0 = location.hash).substring(1)))
      move(); // replace bogus hash
  }

  hash.map = function(x) {
    if (!arguments.length) return map;
    if (map) {
      map.off("move", move);
      window.removeEventListener("hashchange", hashchange, false);
    }
    if (map = x) {
      map.on("move", move);
      window.addEventListener("hashchange", hashchange, false);
      if (location.hash)
        hashchange();
      else
        move();
    }
    return hash;
  };

  hash.parser = function(x) {
    if (!arguments.length) return parser;
    parser = x;
    return hash;
  };

  hash.formatter = function(x) {
    if (!arguments.length) return formatter;
    formatter = x;
    return hash;
  };

  return hash;
};
ms.touch = function() {
  var touch = {},
      map,
      container,
      rotate = false,
      last = 0,
      zoom,
      angle,
      locations = {}; // touch identifier -> location

  window.addEventListener("touchmove", touchmove, false);

  function touchstart(e) {
    var i = -1,
        n = e.touches.length,
        t = Date.now();

    // doubletap detection
    if ((n == 1) && (t - last < 300)) {
      var z = map.zoom();
      map.zoomBy(1 - z + Math.floor(z), map.mouse(e.touches[0]));
      e.preventDefault();
    }
    last = t;

    // store original zoom & touch locations
    zoom = map.zoom();
    angle = map.angle();
    while (++i < n) {
      t = e.touches[i];
      locations[t.identifier] = map.pointLocation(map.mouse(t));
    }
  }

  function touchmove(e) {
    switch (e.touches.length) {
      case 1: { // single-touch pan
        var t0 = e.touches[0];
        map.zoomBy(0, map.mouse(t0), locations[t0.identifier]);
        e.preventDefault();
        break;
      }
      case 2: { // double-touch pan + zoom + rotate
        var t0 = e.touches[0],
            t1 = e.touches[1],
            p0 = map.mouse(t0),
            p1 = map.mouse(t1),
            p2 = {x: (p0.x + p1.x) / 2, y: (p0.y + p1.y) / 2}, // center point
            c0 = ms.map.locationCoordinate(locations[t0.identifier]),
            c1 = ms.map.locationCoordinate(locations[t1.identifier]),
            c2 = {row: (c0.row + c1.row) / 2, column: (c0.column + c1.column) / 2, zoom: 0},
            l2 = ms.map.coordinateLocation(c2); // center location
        map.zoomBy(Math.log(e.scale) / Math.LN2 + zoom - map.zoom(), p2, l2);
        if (rotate) map.angle(e.rotation / 180 * Math.PI + angle);
        e.preventDefault();
        break;
      }
    }
  }

  touch.rotate = function(x) {
    if (!arguments.length) return rotate;
    rotate = x;
    return touch;
  };

  touch.map = function(x) {
    if (!arguments.length) return map;
    if (map) {
      container.removeEventListener("touchstart", touchstart, false);
      container = null;
    }
    if (map = x) {
      container = map.container();
      container.addEventListener("touchstart", touchstart, false);
    }
    return touch;
  };

  return touch;
};
// Default map controls.
ms.interact = function() {
  var interact = {},
      drag = ms.drag(),
      wheel = ms.wheel(),
      dblclick = ms.dblclick(),
      touch = ms.touch(),
      arrow = ms.arrow();

  interact.map = function(x) {
    drag.map(x);
    wheel.map(x);
    dblclick.map(x);
    touch.map(x);
    arrow.map(x);
    return interact;
  };

  return interact;
};
ms.compass = function() {
  var compass = {},
      g = ms.svg("g"),
      ticks = {},
      r = 30,
      speed = 16,
      last = 0,
      repeatDelay = 250,
      repeatInterval = 50,
      position = "top-left", // top-left, top-right, bottom-left, bottom-right
      zoomStyle = "small", // none, small, big
      zoomContainer,
      panStyle = "small", // none, small
      panTimer,
      panDirection,
      panContainer,
      drag,
      dragRect = ms.svg("rect"),
      map,
      container,
      window;

  g.setAttribute("class", "compass");
  dragRect.setAttribute("class", "back fore");
  dragRect.setAttribute("pointer-events", "none");
  dragRect.setAttribute("display", "none");

  function panStart(e) {
    g.setAttribute("class", "compass active");
    if (!panTimer) panTimer = setInterval(panRepeat, repeatInterval);
    if (panDirection) map.panBy(panDirection);
    last = Date.now();
    return cancel(e);
  }

  function panRepeat() {
    if (panDirection && (Date.now() > last + repeatDelay)) {
      map.panBy(panDirection);
    }
  }

  function mousedown(e) {
    if (e.shiftKey) {
      drag = {x0: map.mouse(e)};
      map.focusableParent().focus();
      return cancel(e);
    }
  }

  function mousemove(e) {
    if (!drag) return;
    drag.x1 = map.mouse(e);
    dragRect.setAttribute("x", Math.min(drag.x0.x, drag.x1.x));
    dragRect.setAttribute("y", Math.min(drag.x0.y, drag.x1.y));
    dragRect.setAttribute("width", Math.abs(drag.x0.x - drag.x1.x));
    dragRect.setAttribute("height", Math.abs(drag.x0.y - drag.x1.y));
    dragRect.removeAttribute("display");
  }

  function mouseup(e) {
    g.setAttribute("class", "compass");
    if (drag) {
      if (drag.x1) {
        map.extent([
          map.pointLocation({
            x: Math.min(drag.x0.x, drag.x1.x),
            y: Math.max(drag.x0.y, drag.x1.y)
          }),
          map.pointLocation({
            x: Math.max(drag.x0.x, drag.x1.x),
            y: Math.min(drag.x0.y, drag.x1.y)
          })
        ]);
        dragRect.setAttribute("display", "none");
      }
      drag = null;
    }
    if (panTimer) {
      clearInterval(panTimer);
      panTimer = 0;
    }
  }

  function panBy(x) {
    return function() {
      if (x)
        this.setAttribute("class", "active");
      else
        this.removeAttribute("class");
      panDirection = x;
    };
  }

  function zoomBy(x) {
    return function(e) {
      g.setAttribute("class", "compass active");
      var z = map.zoom();
      map.zoom(x < 0 ? Math.ceil(z) - 1 : Math.floor(z) + 1);
      return cancel(e);
    };
  }

  function zoomTo(x) {
    return function(e) {
      map.zoom(x);
      return cancel(e);
    };
  }

  function zoomOver() {
    this.setAttribute("class", "active");
  }

  function zoomOut() {
    this.removeAttribute("class");
  }

  function cancel(e) {
    e.stopPropagation();
    e.preventDefault();
    return false;
  }

  function pan(by) {
    var x = Math.SQRT1_2 * r,
        y = r * 0.7,
        z = r * 0.2,
        g = ms.svg("g"),
        dir = g.appendChild(ms.svg("path")),
        chv = g.appendChild(ms.svg("path"));
    dir.setAttribute("class", "direction");
    dir.setAttribute("pointer-events", "all");
    dir.setAttribute("d", "M0,0L" + x + "," + x + "A" + r + "," + r + " 0 0,1 " + -x + "," + x + "Z");
    chv.setAttribute("class", "chevron");
    chv.setAttribute("d", "M" + z + "," + (y - z) + "L0," + y + " " + -z + "," + (y - z));
    chv.setAttribute("pointer-events", "none");
    g.addEventListener("mousedown", panStart, false);
    g.addEventListener("mouseover", panBy(by), false);
    g.addEventListener("mouseout", panBy(null), false);
    g.addEventListener("dblclick", cancel, false);
    return g;
  }

  function zoom(by) {
    var x = r * 0.4,
        y = x / 2,
        g = ms.svg("g"),
        back = g.appendChild(ms.svg("path")),
        dire = g.appendChild(ms.svg("path")),
        chev = g.appendChild(ms.svg("path")),
        fore = g.appendChild(ms.svg("path"));
    back.setAttribute("class", "back");
    back.setAttribute("d", "M" + -x + ",0V" + -x + "A" + x + "," + x + " 0 1,1 " + x + "," + -x + "V0Z");
    dire.setAttribute("class", "direction");
    dire.setAttribute("d", back.getAttribute("d"));
    chev.setAttribute("class", "chevron");
    chev.setAttribute("d", "M" + -y + "," + -x + "H" + y + (by > 0 ? "M0," + (-x - y) + "V" + -y : ""));
    fore.setAttribute("class", "fore");
    fore.setAttribute("fill", "none");
    fore.setAttribute("d", back.getAttribute("d"));
    g.addEventListener("mousedown", zoomBy(by), false);
    g.addEventListener("mouseover", zoomOver, false);
    g.addEventListener("mouseout", zoomOut, false);
    g.addEventListener("dblclick", cancel, false);
    return g;
  }

  function tick(i) {
    var x = r * 0.2,
        y = r * 0.4,
        g = ms.svg("g"),
        back = g.appendChild(ms.svg("rect")),
        chev = g.appendChild(ms.svg("path"));
    back.setAttribute("pointer-events", "all");
    back.setAttribute("fill", "none");
    back.setAttribute("x", -y);
    back.setAttribute("y", -0.75 * y);
    back.setAttribute("width", 2 * y);
    back.setAttribute("height", 1.5 * y);
    chev.setAttribute("class", "chevron");
    chev.setAttribute("d", "M" + -x + ",0H" + x);
    g.addEventListener("mousedown", zoomTo(i), false);
    g.addEventListener("dblclick", cancel, false);
    return g;
  }

  function move() {
    var x = r + 6, y = x, size = map.size();
    switch (position) {
      case "top-left": break;
      case "top-right": x = size.x - x; break;
      case "bottom-left": y = size.y - y; break;
      case "bottom-right": x = size.x - x; y = size.y - y; break;
    }
    g.setAttribute("transform", "translate(" + x + "," + y + ")");
    dragRect.setAttribute("transform", "translate(" + -x + "," + -y + ")");
    for (var i in ticks) {
      if (i == map.zoom())
        ticks[i].setAttribute("class", "active");
      else
        ticks[i].removeAttribute("class");
    }
  }

  function draw() {
    while (g.lastChild) g.removeChild(g.lastChild);

    g.appendChild(dragRect);

    if (panStyle != "none") {
      panContainer = g.appendChild(ms.svg("g"));
      panContainer.setAttribute("class", "pan");

      var back = panContainer.appendChild(ms.svg("circle"));
      back.setAttribute("class", "back");
      back.setAttribute("r", r);

      var s = panContainer.appendChild(pan({x: 0, y: -speed}));
      s.setAttribute("transform", "rotate(0)");

      var w = panContainer.appendChild(pan({x: speed, y: 0}));
      w.setAttribute("transform", "rotate(90)");

      var n = panContainer.appendChild(pan({x: 0, y: speed}));
      n.setAttribute("transform", "rotate(180)");

      var e = panContainer.appendChild(pan({x: -speed, y: 0}));
      e.setAttribute("transform", "rotate(270)");

      var fore = panContainer.appendChild(ms.svg("circle"));
      fore.setAttribute("fill", "none");
      fore.setAttribute("class", "fore");
      fore.setAttribute("r", r);
    } else {
      panContainer = null;
    }

    if (zoomStyle != "none") {
      zoomContainer = g.appendChild(ms.svg("g"));
      zoomContainer.setAttribute("class", "zoom");

      var j = -0.5;
      if (zoomStyle == "big") {
        ticks = {};
        for (var i = map.zoomRange()[0], j = 0; i <= map.zoomRange()[1]; i++, j++) {
          (ticks[i] = zoomContainer.appendChild(tick(i)))
              .setAttribute("transform", "translate(0," + (-(j + 0.75) * r * 0.4) + ")");
        }
      }

      var p = panStyle == "none" ? 0.4 : 2;
      zoomContainer.setAttribute("transform", "translate(0," + r * (/^top-/.test(position) ? (p + (j + 0.5) * 0.4) : -p) + ")");
      zoomContainer.appendChild(zoom(+1)).setAttribute("transform", "translate(0," + (-(j + 0.5) * r * 0.4) + ")");
      zoomContainer.appendChild(zoom(-1)).setAttribute("transform", "scale(-1)");
    } else {
      zoomContainer = null;
    }

    move();
  }

  compass.radius = function(x) {
    if (!arguments.length) return r;
    r = x;
    if (map) draw();
    return compass;
  };

  compass.speed = function(x) {
    if (!arguments.length) return r;
    speed = x;
    return compass;
  };

  compass.position = function(x) {
    if (!arguments.length) return position;
    position = x;
    if (map) draw();
    return compass;
  };

  compass.pan = function(x) {
    if (!arguments.length) return panStyle;
    panStyle = x;
    if (map) draw();
    return compass;
  };

  compass.zoom = function(x) {
    if (!arguments.length) return zoomStyle;
    zoomStyle = x;
    if (map) draw();
    return compass;
  };

  compass.map = function(x) {
    if (!arguments.length) return map;
    if (map) {
      container.removeEventListener("mousedown", mousedown, false);
      container.removeChild(g);
      container = null;
      window.removeEventListener("mousemove", mousemove, false);
      window.removeEventListener("mouseup", mouseup, false);
      window = null;
      map.off("move", move).off("resize", move);
    }
    if (map = x) {
      container = map.svgContainer();
      container.appendChild(g);
      container.addEventListener("mousedown", mousedown, false);
      window = container.ownerDocument.defaultView;
      window.addEventListener("mousemove", mousemove, false);
      window.addEventListener("mouseup", mouseup, false);
      map.on("move", move).on("resize", move);
      draw();
    }
    return compass;
  };

  return compass;
};
ms.grid = function() {
  var grid = {},
      map,
      g = ms.svg("g");

  g.setAttribute("class", "grid");

  function move(e) {
    var p,
        line = g.firstChild,
        size = map.size(),
        nw = map.pointLocation(zero),
        se = map.pointLocation(size),
        step = Math.pow(2, 4 - Math.round(map.zoom()));

    // Round to step.
    nw.lat = Math.floor(nw.lat / step) * step;
    nw.lon = Math.ceil(nw.lon / step) * step;

    // Longitude ticks.
    for (var x; (x = map.locationPoint(nw).x) <= size.x; nw.lon += step) {
      if (!line) line = g.appendChild(ms.svg("line"));
      line.setAttribute("x1", x);
      line.setAttribute("x2", x);
      line.setAttribute("y1", 0);
      line.setAttribute("y2", size.y);
      line = line.nextSibling;
    }

    // Latitude ticks.
    for (var y; (y = map.locationPoint(nw).y) <= size.y; nw.lat -= step) {
      if (!line) line = g.appendChild(ms.svg("line"));
      line.setAttribute("y1", y);
      line.setAttribute("y2", y);
      line.setAttribute("x1", 0);
      line.setAttribute("x2", size.x);
      line = line.nextSibling;
    }

    // Remove extra ticks.
    while (line) {
      var next = line.nextSibling;
      g.removeChild(line);
      line = next;
    }
  }

  grid.map = function(x) {
    if (!arguments.length) return map;
    if (map) {
      g.parentNode.removeChild(g);
      map.off("move", move).off("resize", move);
    }
    if (map = x) {
      map.on("move", move).on("resize", move);
      map.svgContainer().appendChild(g);
      map.dispatch({type: "move"});
    }
    return grid;
  };

  return grid;
};
ms.attribution = function(html) {
  var attribution = {},
      map,
      container = document.createElement("div");

  container.setAttribute("class", "mapsense-attribution");

  attribution.container = function() {
    return container;
  };

  attribution.html = function(x) {
    if (!arguments.length) return container.innerHTML;
    container.innerHTML = x;
    return attribution;
  };

  attribution.map = function(x) {
    if (!arguments.length) return map;
    if (map) {
      if (map === x) {
        container.parentNode.appendChild(container);
        return attribution;
      }
      container.parentNode.removeChild(container);
    }
    map = x;
    if (map) {
      map.relativeContainer().appendChild(container);
    }
    return attribution;
  };

  return attribution.html(html);
};
ms.basemap = function() {
  var basemap = ms.topoJson();
  var attribution = ms.attribution('<a target="_blank" href="https://developer.mapsense.co/tileViewer/?tileset=mapsense.earth">©Mapsense ©OpenStreetMap</a>');

  var url = "https://{S}-api.mapsense.co/universes/mapsense.earth/{Z}/{X}/{Y}.topojson?s=10&ringSpan=8";
  var apiKey;
  var style;

  function urlWithKey() {
    return ms.url(url + "&api-key=" + apiKey)
      .hosts(["a", "b", "c", "d"]);
  }

  var __map__ = basemap.map;
  basemap.map = function(x) {
    var result = __map__.apply(basemap, arguments);
    if (arguments.length)
      attribution.map(x);
    return result;
  };

  var __url__ = basemap.url;
  basemap.url = function(x) {
    if (!arguments.length) return url;
    url = x;
    __url__.call(basemap, urlWithKey());
    return basemap;
  };

  basemap.apiKey = function(x) {
    if (!arguments.length) return apiKey;
    apiKey = x;
    __url__.call(basemap, urlWithKey());
    return basemap;
  };

  basemap.style = function(x) {
    if (!arguments.length) return style;

    if (style)
      attribution.container().classList.remove(style);

    style = x;

    basemap.selection(function(s) {
      var styleClass = style ? "mapsense-" + style : "";
      var zoomClass = "_" + Math.floor(basemap.map().zoom());
      s.attr("class", function(feature) {
        var classes = [ styleClass, zoomClass ];
        if (feature.properties) {
          if (feature.properties.layer)
            classes.push(feature.properties.layer);
          if (feature.properties.sub_layer)
            classes.push(feature.properties.sub_layer);
        }
        return classes.join(" ");
      });
    });

    if (style)
      attribution.container().classList.add(style);

    return basemap;
  };

  basemap.on("load", function(e) {
    var g = e.tile.element;
    var tileBackground = g.querySelector(".tile-background");
    if (tileBackground && style)
      tileBackground.classList.add("mapsense-" + style);
  });

  basemap.style("light");
  basemap.tileBackground(true);
  basemap.clip(true);
  return basemap;
};
ms.stylist = function() {
  var attrs = [],
      styles = [],
      title;

  function stylist(e) {
    var ne = e.features.length,
        na = attrs.length,
        ns = styles.length,
        f, // feature
        d, // data
        o, // element
        x, // attr or style or title descriptor
        v, // attr or style or title value
        i,
        j;
    for (i = 0; i < ne; ++i) {
      if (!(o = (f = e.features[i]).element)) continue;
      d = f.data;
      for (j = 0; j < na; ++j) {
        v = (x = attrs[j]).value;
        if (typeof v === "function") v = v.call(null, d);
        if (v == null) {
          if (x.name.local)
            o.removeAttributeNS(x.name.space, x.name.local);
          else
            o.removeAttribute(x.name);
        }
        else {
          if (x.name.local)
            o.setAttributeNS(x.name.space, x.name.local, v);
          else
            o.setAttribute(x.name, v);
        }
      }
      for (j = 0; j < ns; ++j) {
        v = (x = styles[j]).value;
        if (typeof v === "function") v = v.call(null, d);
        if (v == null)
          o.style.removeProperty(x.name);
        else
          o.style.setProperty(x.name, v, x.priority);
      }
      if (v = title) {
        if (typeof v === "function") v = v.call(null, d);
        while (o.lastChild) o.removeChild(o.lastChild);
        if (v != null) o.appendChild(ms.svg("title")).appendChild(document.createTextNode(v));
      }
    }
  }

  stylist.attr = function(n, v) {
    attrs.push({name: ns(n), value: v});
    return stylist;
  };

  stylist.style = function(n, v, p) {
    styles.push({name: n, value: v, priority: arguments.length < 3 ? null : p});
    return stylist;
  };

  stylist.title = function(v) {
    title = v;
    return stylist;
  };

  return stylist;
};
  if (typeof define === "function" && define.amd)
    define(mapsense);
  else if (typeof module === "object" && module.exports)
    module.exports = mapsense;
  this.mapsense = mapsense;
})();

topojson.v1.min.js

// https://github.com/topojson/topojson-client Version 1.8.0. Copyright 2016 Mike Bostock.
!function(n,t){"object"==typeof exports&&"undefined"!=typeof module?t(exports):"function"==typeof define&&define.amd?define(["exports"],t):t(n.topojson=n.topojson||{})}(this,function(n){"use strict";function t(n){if(!n)return h;var t,r,e=n.scale[0],o=n.scale[1],i=n.translate[0],u=n.translate[1];return function(n,f){f||(t=r=0),n[0]=(t+=n[0])*e+i,n[1]=(r+=n[1])*o+u}}function r(n){if(!n)return h;var t,r,e=n.scale[0],o=n.scale[1],i=n.translate[0],u=n.translate[1];return function(n,f){f||(t=r=0);var c=Math.round((n[0]-i)/e),a=Math.round((n[1]-u)/o);n[0]=c-t,n[1]=a-r,t=c,r=a}}function e(n,t){for(var r,e=n.length,o=e-t;o<--e;)r=n[o],n[o++]=n[e],n[e]=r}function o(n,t){for(var r=0,e=n.length;r<e;){var o=r+e>>>1;n[o]<t?r=o+1:e=o}return r}function i(n,t){var r={type:"Feature",id:t.id,properties:t.properties||{},geometry:u(n,t)};return null==t.id&&delete r.id,r}function u(n,r){function o(n,t){t.length&&t.pop();for(var r,o=l[n<0?~n:n],i=0,u=o.length;i<u;++i)t.push(r=o[i].slice()),s(r,i);n<0&&e(t,u)}function i(n){return n=n.slice(),s(n,0),n}function u(n){for(var t=[],r=0,e=n.length;r<e;++r)o(n[r],t);return t.length<2&&t.push(t[0].slice()),t}function f(n){for(var t=u(n);t.length<4;)t.push(t[0].slice());return t}function c(n){return n.map(f)}function a(n){var t=n.type;return"GeometryCollection"===t?{type:t,geometries:n.geometries.map(a)}:t in h?{type:t,coordinates:h[t](n)}:null}var s=t(n.transform),l=n.arcs,h={Point:function(n){return i(n.coordinates)},MultiPoint:function(n){return n.coordinates.map(i)},LineString:function(n){return u(n.arcs)},MultiLineString:function(n){return n.arcs.map(u)},Polygon:function(n){return c(n.arcs)},MultiPolygon:function(n){return n.arcs.map(c)}};return a(r)}function f(n,t,r){function e(n){var t=n<0?~n:n;(a[t]||(a[t]=[])).push({i:n,g:c})}function o(n){n.forEach(e)}function i(n){n.forEach(o)}function u(n){"GeometryCollection"===n.type?n.geometries.forEach(u):n.type in s&&(c=n,s[n.type](n.arcs))}var f=[];if(arguments.length>1){var c,a=[],s={LineString:o,MultiLineString:i,Polygon:i,MultiPolygon:function(n){n.forEach(i)}};u(t),a.forEach(arguments.length<3?function(n){f.push(n[0].i)}:function(n){r(n[0].g,n[n.length-1].g)&&f.push(n[0].i)})}else for(var l=0,h=n.arcs.length;l<h;++l)f.push(l);return{type:"MultiLineString",arcs:v(n,f)}}function c(n){var t=n[0],r=n[1],e=n[2];return Math.abs((t[0]-e[0])*(r[1]-t[1])-(t[0]-r[0])*(e[1]-t[1]))}function a(n){for(var t,r=-1,e=n.length,o=n[e-1],i=0;++r<e;)t=o,o=n[r],i+=t[0]*o[1]-t[1]*o[0];return i/2}function s(n,t){function r(n){n.forEach(function(t){t.forEach(function(t){(o[t=t<0?~t:t]||(o[t]=[])).push(n)})}),i.push(n)}function e(t){return Math.abs(a(u(n,{type:"Polygon",arcs:[t]}).coordinates[0]))}var o={},i=[],f=[];return t.forEach(function(n){"Polygon"===n.type?r(n.arcs):"MultiPolygon"===n.type&&n.arcs.forEach(r)}),i.forEach(function(n){if(!n._){var t=[],r=[n];for(n._=1,f.push(t);n=r.pop();)t.push(n),n.forEach(function(n){n.forEach(function(n){o[n<0?~n:n].forEach(function(n){n._||(n._=1,r.push(n))})})})}}),i.forEach(function(n){delete n._}),{type:"MultiPolygon",arcs:f.map(function(t){var r,i=[];if(t.forEach(function(n){n.forEach(function(n){n.forEach(function(n){o[n<0?~n:n].length<2&&i.push(n)})})}),i=v(n,i),(r=i.length)>1)for(var u,f,c=1,a=e(i[0]);c<r;++c)(u=e(i[c]))>a&&(f=i[0],i[0]=i[c],i[c]=f,a=u);return i})}}function l(n,t){return n[1][2]-t[1][2]}var h=function(){},p=function(n,t){return"GeometryCollection"===t.type?{type:"FeatureCollection",features:t.geometries.map(function(t){return i(n,t)})}:i(n,t)},v=function(n,t){function r(t){var r,e=n.arcs[t<0?~t:t],o=e[0];return n.transform?(r=[0,0],e.forEach(function(n){r[0]+=n[0],r[1]+=n[1]})):r=e[e.length-1],t<0?[r,o]:[o,r]}function e(n,t){for(var r in n){var e=n[r];delete t[e.start],delete e.start,delete e.end,e.forEach(function(n){o[n<0?~n:n]=1}),f.push(e)}}var o={},i={},u={},f=[],c=-1;return t.forEach(function(r,e){var o,i=n.arcs[r<0?~r:r];i.length<3&&!i[1][0]&&!i[1][1]&&(o=t[++c],t[c]=r,t[e]=o)}),t.forEach(function(n){var t,e,o=r(n),f=o[0],c=o[1];if(t=u[f])if(delete u[t.end],t.push(n),t.end=c,e=i[c]){delete i[e.start];var a=e===t?t:t.concat(e);i[a.start=t.start]=u[a.end=e.end]=a}else i[t.start]=u[t.end]=t;else if(t=i[c])if(delete i[t.start],t.unshift(n),t.start=f,e=u[f]){delete u[e.end];var s=e===t?t:e.concat(t);i[s.start=e.start]=u[s.end=t.end]=s}else i[t.start]=u[t.end]=t;else t=[n],i[t.start=f]=u[t.end=c]=t}),e(u,i),e(i,u),t.forEach(function(n){o[n<0?~n:n]||f.push([n])}),f},g=function(n){return u(n,f.apply(this,arguments))},d=function(n){return u(n,s.apply(this,arguments))},y=function(n){function t(n,t){n.forEach(function(n){n<0&&(n=~n);var r=i[n];r?r.push(t):i[n]=[t]})}function r(n,r){n.forEach(function(n){t(n,r)})}function e(n,t){"GeometryCollection"===n.type?n.geometries.forEach(function(n){e(n,t)}):n.type in f&&f[n.type](n.arcs,t)}var i={},u=n.map(function(){return[]}),f={LineString:t,MultiLineString:r,Polygon:r,MultiPolygon:function(n,t){n.forEach(function(n){r(n,t)})}};n.forEach(e);for(var c in i)for(var a=i[c],s=a.length,l=0;l<s;++l)for(var h=l+1;h<s;++h){var p,v=a[l],g=a[h];(p=u[v])[c=o(p,g)]!==g&&p.splice(c,0,g),(p=u[g])[c=o(p,v)]!==v&&p.splice(c,0,v)}return u},m=function(){function n(n,t){for(;t>0;){var r=(t+1>>1)-1,o=e[r];if(l(n,o)>=0)break;e[o._=t]=o,e[n._=t=r]=n}}function t(n,t){for(;;){var r=t+1<<1,i=r-1,u=t,f=e[u];if(i<o&&l(e[i],f)<0&&(f=e[u=i]),r<o&&l(e[r],f)<0&&(f=e[u=r]),u===t)break;e[f._=t]=f,e[n._=t=u]=n}}var r={},e=[],o=0;return r.push=function(t){return n(e[t._=o]=t,o++),o},r.pop=function(){if(!(o<=0)){var n,r=e[0];return--o>0&&(n=e[o],t(e[n._=0]=n,0)),r}},r.remove=function(r){var i,u=r._;if(e[u]===r)return u!==--o&&(i=e[o],(l(i,r)<0?n:t)(e[i._=u]=i,u)),u},r},E=function(n,e){function o(n){f.remove(n),n[1][2]=e(n),f.push(n)}var i=t(n.transform),u=r(n.transform),f=m();return null==e&&(e=c),n.arcs.forEach(function(n){var t,r,c,a,s=[],l=0;for(r=0,c=n.length;r<c;++r)a=n[r],i(n[r]=[a[0],a[1],1/0],r);for(r=1,c=n.length-1;r<c;++r)t=n.slice(r-1,r+2),t[1][2]=e(t),s.push(t),f.push(t);for(r=0,c=s.length;r<c;++r)t=s[r],t.previous=s[r-1],t.next=s[r+1];for(;t=f.pop();){var h=t.previous,p=t.next;t[1][2]<l?t[1][2]=l:l=t[1][2],h&&(h.next=p,h[2]=t[2],o(h)),p&&(p.previous=h,p[0]=t[0],o(p))}n.forEach(u)}),n};n.mesh=g,n.meshArcs=f,n.merge=d,n.mergeArcs=s,n.feature=p,n.neighbors=y,n.presimplify=E,Object.defineProperty(n,"__esModule",{value:!0})});