adg29

This example uses custom map data that includes counties in the state of New York. Custom map data is specified with geographyConfig.dataUrl, which will attempt to make d3.json request to that URL.

In this example, counties are referred to by their FIPs code.

The data was converted from a .SHP file to TopoJSON, instructions to do that here

More DataMaps examples here

sahat

var socket = io.connect('http://localhost');
var startTime;

setInterval(function() {
  startTime = Date.now();
  socket.emit('ping');
}, 2000);

socket.on('pong', function() {
  latency = Date.now() - startTime;