Print text from GeoJSON on the map
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Label Me
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content='initial-scale=1,maximum-scale=1,user-scalable=no' /> | |
| <script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script> | |
| <script src="http://d3js.org/topojson.v1.min.js" charset="utf-8"></script> | |
| <script src="https://developer.mapsense.co/mapsense.js" charset="utf-8"></script> | |
| <link type="text/css" href="https://developer.mapsense.co/mapsense.css" rel="stylesheet"/> | |
| <style> | |
| html, body, #myMap{ | |
| height: 100%; | |
| width: 100%; | |
| margin: 0; padding: 0; | |
| } | |
| .point { | |
| fill: rgba(68, 167, 228, 0.4); | |
| stroke: rgba(68, 167, 228, 1); | |
| stroke-width: 1; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div id="myMap"></div> | |
| <script> | |
| var map = mapsense.map("#myMap"); //tell it where to go | |
| map.add( | |
| mapsense.basemap() | |
| .apiKey("key-2d5eacd8b924489c8ed5e8418bd883bc") | |
| ) | |
| .center( {lon: -122.463, lat: 37.765}) //set a center | |
| .zoom(10); //set a zoom | |
| var point = [markLatLon(37.78709, -122.41094, "Hello, Map!")]; // a geojson features array | |
| pt_layer = mapsense.geoJson() | |
| .features(point) | |
| .selection(function(d){ | |
| d.attr("class", "point") | |
| .attr("r", "10"); | |
| }) | |
| .on("load", load) | |
| ; | |
| map.add(pt_layer); | |
| function markLatLon(lat,lon,name){ | |
| name = name || ""; | |
| var feature = { | |
| type: "Feature", | |
| geometry: {type: "Point", "coordinates": [ +lon, +lat ]}, | |
| properties: {name: name} | |
| }; | |
| return feature; | |
| } | |
| function load(e) { | |
| var label = e.features[0].data.properties.name; | |
| var f = e.features[0], | |
| c = f.element, | |
| t = mapsense.svg("text"); | |
| t.setAttribute("transform", c.getAttribute("transform")); | |
| t.setAttribute("text-anchor", "middle"); | |
| t.setAttribute("y", "0.5em"); | |
| t.setAttribute("dy", "1.1em"); | |
| t.setAttribute("id", "autolabel"); | |
| t.setAttribute("class", "map_label"); | |
| t.setAttribute("paint-order", "stroke"); | |
| var tnode = document.createTextNode(label); | |
| t.appendChild(tnode); | |
| c.parentNode.insertBefore(t, c.nextSibling); | |
| } | |
| 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; | |
| } | |
| </script> | |
| </body> | |
| </html> |
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