markmarkoh/README.md

## README.md

      
    Raw
  

              README.md
            
          
    If my hometown in Montgomery, New York were to overlay my current location in Austin, Texas.
Experimenting with qGIS, ogr2ogr and TopoJSON.

  
## index.html
<!DOCTYPE html>
<meta charset="utf-8">
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="http://d3js.org/topojson.v1.min.js"></script>
<script>

var width = 960,
    height = 500;

var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height);

d3.json("mystates.topo.json", function(error, map) {

  var projection = d3.geo.albers().scale(2600).translate([width/2, 0])
  var path = d3.geo.path().projection(projection);
  var colors = d3.scale.category20b();

  svg.append("g")
      .attr("transform", "translate(0,-85)")
      .attr("clip-path", "url(#texas)")
      .selectAll('path')
      .data(topojson.feature(map, map.objects.mystates).features)
      .enter()
        .append("path")
        .attr("d", path)
        .attr("id", function(d) {
          return d.id;
        })
        .attr("fill", function(d, idx) {
          if ( d.id === "TX" ) return 'none';
          return colors(idx)
        })
        .style("stroke", "#666")
        .style("stroke-width", function(d) {
          if ( d.id === "TX" ) return 1.5;
          return 0.5;
        })


 //apply mask
 svg.append("defs")
    .append("clipPath")
    .attr("id", "texas")
      .append("path")
      .attr("d", function() {
        return d3.select("#TX").attr("d");
      });


  var montgomery = {
    lat: 41.523333,
    lng: -74.236944,
    id: "MON"
  };

  var austin = {
    lat: 30.25,
    lng: -97.75,
    id: "AUS"
  };

  svg.select("g").selectAll("circle").data([montgomery,austin])
    .enter()
    .append("circle")
    .attr("id", function(d) {
      return d.id;
    })
    .attr("r", function(d) {
      if ( d.id === "MON" ) return 3;
      return 2000;
    })
    .attr("fill", "none")
    .style("stroke", "#fa0fa0")
    .attr("cx", function(d) {
      return projection([d.lng, d.lat])[0]
    })
    .attr("cy", function(d) {
      return projection([d.lng, d.lat])[1]
    }).transition()
      .delay(200)
      .duration(2000)
      .attr("r", 3)


    //move other states in
  svg.select("g").selectAll("path:not(#TX),circle:not(#AUS)")
    .transition()
    .delay(2000)
    .duration(4000)
    .attr("transform", "translate(-814,404)rotate(9)")

});
</script>
</body>
</html>

## mystates.topo.json

      
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              mystates.topo.json
            
          
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	<!DOCTYPE html>
	<meta charset="utf-8">
	<body>
	<script src="http://d3js.org/d3.v3.min.js"></script>
	<script src="http://d3js.org/topojson.v1.min.js"></script>
	<script>

	var width = 960,
	height = 500;

	var svg = d3.select("body").append("svg")
	.attr("width", width)
	.attr("height", height);

	d3.json("mystates.topo.json", function(error, map) {

	var projection = d3.geo.albers().scale(2600).translate([width/2, 0])
	var path = d3.geo.path().projection(projection);
	var colors = d3.scale.category20b();

	svg.append("g")
	.attr("transform", "translate(0,-85)")
	.attr("clip-path", "url(#texas)")
	.selectAll('path')
	.data(topojson.feature(map, map.objects.mystates).features)
	.enter()
	.append("path")
	.attr("d", path)
	.attr("id", function(d) {
	return d.id;
	})
	.attr("fill", function(d, idx) {
	if ( d.id === "TX" ) return 'none';
	return colors(idx)
	})
	.style("stroke", "#666")
	.style("stroke-width", function(d) {
	if ( d.id === "TX" ) return 1.5;
	return 0.5;
	})


	//apply mask
	svg.append("defs")
	.append("clipPath")
	.attr("id", "texas")
	.append("path")
	.attr("d", function() {
	return d3.select("#TX").attr("d");
	});


	var montgomery = {
	lat: 41.523333,
	lng: -74.236944,
	id: "MON"
	};

	var austin = {
	lat: 30.25,
	lng: -97.75,
	id: "AUS"
	};

	svg.select("g").selectAll("circle").data([montgomery,austin])
	.enter()
	.append("circle")
	.attr("id", function(d) {
	return d.id;
	})
	.attr("r", function(d) {
	if ( d.id === "MON" ) return 3;
	return 2000;
	})
	.attr("fill", "none")
	.style("stroke", "#fa0fa0")
	.attr("cx", function(d) {
	return projection([d.lng, d.lat])[0]
	})
	.attr("cy", function(d) {
	return projection([d.lng, d.lat])[1]
	}).transition()
	.delay(200)
	.duration(2000)
	.attr("r", 3)


	//move other states in
	svg.select("g").selectAll("path:not(#TX),circle:not(#AUS)")
	.transition()
	.delay(2000)
	.duration(4000)
	.attr("transform", "translate(-814,404)rotate(9)")

	});
	</script>
	</body>
	</html>