kosamari/city.json

## city.json

      
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              city.json
            
          
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## index.html
<!DOCTYPE html>
<html>
  <head>
    <script src="http://d3js.org/d3.v3.min.js"></script>
    <script src="http://d3js.org/topojson.v1.min.js"></script>
    <script src="http://d3js.org/queue.v1.min.js"></script>
    <style type="text/css">
    .states {
      fill: RGBA(10, 166, 153, 0.5);
      stroke: #E5E9EC;
      stroke-width:1px;
    }

    .symbol {
      fill: orange;
      stroke: orange;
      stroke-width:10px;
      stroke-opacity: .5;
    }
    </style>
  </head>
  <body>
    <div id="graph"></div>
    <script type="text/javascript">
       /*
      * D3 script to create map
      * This map is based on @mbostock 's Symbol Map
      * original : http://bl.ocks.org/mbostock/4342045
      * Removed some states and added random fade in animation
      */
      var us, centroid;
      var radius = d3.scale.sqrt()
          .domain([0, 1e7])
          .range([0, 10]);

      function mapRender() {

        d3.select('#graph svg').remove();

        var width = 960,
            height = 500;

        var projection = d3.geo.albersUsa()
            .translate([width / 2, height / 2]);

        var path = d3.geo.path()
        .projection(projection);

        var svg = d3.select('#graph').append('svg')
          .attr('width', width)
          .attr('height', height)
          .attr('transform', 'translate(' + (width/2) +
               ',' + (height/2) + ')');
        svg.append('path')
            .attr('class', 'states')
            .datum(topojson.feature(us, us.objects.states))
            .attr('d', path);

        var circle = svg.selectAll('.symbol')
            .data(centroid.features.sort(function(a, b) { return b.properties.population - a.properties.population; }))
          .enter().append('path')
          .attr('d', path.pointRadius(function(d) { return radius(d.properties.population); }));

         function annimateCircle() {
           circle.attr('class', 'symbol')
            .attr('opacity', 0)
              .transition().delay(function(d,i){ return i*500 ; }).duration(500)
              .attr('opacity', function(){
                var rand = Math.ceil(Math.random()*10);
                if(rand > 8 ){
                  return 1;
                }
                return 0;
              })
              .transition().duration(500)
              .attr('opacity',0)
              .each('end', annimateCircle);
          }
        annimateCircle();
      }

      function setData(error, usdata, centroiddata){
        us = usdata;
        centroid= centroiddata;
        mapRender();
      }

      queue().defer(d3.json, './us.json')
             .defer(d3.json, './city.json')
             .await(setData);
    </script>
  </body>
</html>

## us.json

      
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              us.json
            
          
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	<!DOCTYPE html>
	<html>
	<head>
	<script src="http://d3js.org/d3.v3.min.js"></script>
	<script src="http://d3js.org/topojson.v1.min.js"></script>
	<script src="http://d3js.org/queue.v1.min.js"></script>
	<style type="text/css">
	.states {
	fill: RGBA(10, 166, 153, 0.5);
	stroke: #E5E9EC;
	stroke-width:1px;
	}

	.symbol {
	fill: orange;
	stroke: orange;
	stroke-width:10px;
	stroke-opacity: .5;
	}
	</style>
	</head>
	<body>
	<div id="graph"></div>
	<script type="text/javascript">
	/*
	* D3 script to create map
	* This map is based on @mbostock 's Symbol Map
	* original : http://bl.ocks.org/mbostock/4342045
	* Removed some states and added random fade in animation
	*/
	var us, centroid;
	var radius = d3.scale.sqrt()
	.domain([0, 1e7])
	.range([0, 10]);

	function mapRender() {

	d3.select('#graph svg').remove();

	var width = 960,
	height = 500;

	var projection = d3.geo.albersUsa()
	.translate([width / 2, height / 2]);

	var path = d3.geo.path()
	.projection(projection);

	var svg = d3.select('#graph').append('svg')
	.attr('width', width)
	.attr('height', height)
	.attr('transform', 'translate(' + (width/2) +
	',' + (height/2) + ')');
	svg.append('path')
	.attr('class', 'states')
	.datum(topojson.feature(us, us.objects.states))
	.attr('d', path);

	var circle = svg.selectAll('.symbol')
	.data(centroid.features.sort(function(a, b) { return b.properties.population - a.properties.population; }))
	.enter().append('path')
	.attr('d', path.pointRadius(function(d) { return radius(d.properties.population); }));

	function annimateCircle() {
	circle.attr('class', 'symbol')
	.attr('opacity', 0)
	.transition().delay(function(d,i){ return i*500 ; }).duration(500)
	.attr('opacity', function(){
	var rand = Math.ceil(Math.random()*10);
	if(rand > 8 ){
	return 1;
	}
	return 0;
	})
	.transition().duration(500)
	.attr('opacity',0)
	.each('end', annimateCircle);
	}
	annimateCircle();
	}

	function setData(error, usdata, centroiddata){
	us = usdata;
	centroid= centroiddata;
	mapRender();
	}

	queue().defer(d3.json, './us.json')
	.defer(d3.json, './city.json')
	.await(setData);
	</script>
	</body>
	</html>