diegovalle/README.md

## README.md

      
    Raw
  

              README.md
            
          
    Projected topojson example of a choropleth of Mexican municipalities and states with tooltips and each municipality colored by the number of people who live there
First download the shapefiles of Mexico (AGEBs, Manzanas, Municipios, Estados, etc) 1.4GB from
http://www.diegovalle.net/projects.html#url=%23datasets

Then convert the files 'shps/national/national_municipal.shp' and 'shps/national/national_estatal.shp' to topojson with
topojson \
    --width 960 \
    --height 800 \
    --margin 0 \
    -s .25 \
    --projection 'd3.geo.mercator()' \
    -o national.json \
    --id-property=+CVE_ENT,+CVE_MUN \
    -p +CVE_ENT,+CVE_MUN,NOM_MUN,+POB1 \
    counties=national_municipal.shp \
    states=national_estatal.shp

Based on Mike Bostock's Projected TopoJSON example https://gist.github.com/mbostock/5557726

  
## index.html
<!DOCTYPE html>
<meta charset="utf-8">
<style>
.counties {
  fill: none;
 stroke: #eee;
}

.state-borders {
  fill: none;
  stroke: #fff;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.boundary {
  fill: none;
  stroke: #999;
}

.selected {
  fill:red
}

.q0-9 { fill:rgb(247,251,255); }
.q1-9 { fill:rgb(222,235,247); }
.q2-9 { fill:rgb(198,219,239); }
.q3-9 { fill:rgb(158,202,225); }
.q4-9 { fill:rgb(107,174,214); }
.q5-9 { fill:rgb(66,146,198); }
.q6-9 { fill:rgb(33,113,181); }
.q7-9 { fill:rgb(8,81,156); }
.q8-9 { fill:rgb(8,48,107); }
</style>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="http://d3js.org/topojson.v1.min.js"></script>
<script>
//Extra width for the tooltips
var width = 1200,
    height = 800;

 comma = d3.format("0,000");

var quantize = d3.scale.quantize()
    //Iztapalapa is the mostpopulated county with ~1816000 people
    .domain([0, 1816000])
    .range(d3.range(9).map(function(i) { return "q" + i + "-9"; }));

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

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

d3.json("national.json", function(error, ca) {
  svg.append("g")
       .attr("class", "counties")
      .selectAll("path")
      .data(topojson.feature(ca, ca.objects.counties).features)
      .enter().append("path")
      .attr("class", function(d) { return quantize(+d.properties.POB1); })
      .attr("d", path)
      .attr("title", function(d) { return +d.properties.POB1; })
      .on("mouseover", function(d) {
         var xPosition = d3.mouse(this)[0];
         var yPosition = d3.mouse(this)[1] - 30;

                    svg.append("text")
                        .attr("id", "tooltip")
                        .attr("x", xPosition)
                        .attr("y", yPosition)
                        .attr("text-anchor", "left")
                        .text(d.properties.NOM_MUN + " - " + comma(d.properties.POB1));

                    d3.select(this)
                    .attr("class", "selected");
                })
                .on("mouseout", function(d) {
                    d3.select("#tooltip").remove();

                    d3.select(this)
                    .transition()
                    .attr("class", function(d) { return quantize(+d.properties.POB1); })
                    .duration(250)
                    });


   svg.append("path")
      .datum(topojson.mesh(ca, ca.objects.states))
      .attr("class", "boundary")
      .attr("d", path);

});

d3.select(self.frameElement).style("height", height + "px");

</script>

## national.json

      
Display the source blob

    
Display the rendered blob

    
    Raw
  

              national.json
            
          
      Loading

      Sorry, something went wrong. Reload?
      Sorry, we cannot display this file.
      Sorry, this file is invalid so it cannot be displayed.
      
          Viewer requires iframe.
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>
	.counties {
	fill: none;
	stroke: #eee;
	}

	.state-borders {
	fill: none;
	stroke: #fff;
	stroke-linejoin: round;
	stroke-linecap: round;
	}

	.boundary {
	fill: none;
	stroke: #999;
	}

	.selected {
	fill:red
	}

	.q0-9 { fill:rgb(247,251,255); }
	.q1-9 { fill:rgb(222,235,247); }
	.q2-9 { fill:rgb(198,219,239); }
	.q3-9 { fill:rgb(158,202,225); }
	.q4-9 { fill:rgb(107,174,214); }
	.q5-9 { fill:rgb(66,146,198); }
	.q6-9 { fill:rgb(33,113,181); }
	.q7-9 { fill:rgb(8,81,156); }
	.q8-9 { fill:rgb(8,48,107); }
	</style>
	<body>
	<script src="http://d3js.org/d3.v3.min.js"></script>
	<script src="http://d3js.org/topojson.v1.min.js"></script>
	<script>
	//Extra width for the tooltips
	var width = 1200,
	height = 800;

	comma = d3.format("0,000");

	var quantize = d3.scale.quantize()
	//Iztapalapa is the mostpopulated county with ~1816000 people
	.domain([0, 1816000])
	.range(d3.range(9).map(function(i) { return "q" + i + "-9"; }));

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

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

	d3.json("national.json", function(error, ca) {
	svg.append("g")
	.attr("class", "counties")
	.selectAll("path")
	.data(topojson.feature(ca, ca.objects.counties).features)
	.enter().append("path")
	.attr("class", function(d) { return quantize(+d.properties.POB1); })
	.attr("d", path)
	.attr("title", function(d) { return +d.properties.POB1; })
	.on("mouseover", function(d) {
	var xPosition = d3.mouse(this)[0];
	var yPosition = d3.mouse(this)[1] - 30;

	svg.append("text")
	.attr("id", "tooltip")
	.attr("x", xPosition)
	.attr("y", yPosition)
	.attr("text-anchor", "left")
	.text(d.properties.NOM_MUN + " - " + comma(d.properties.POB1));

	d3.select(this)
	.attr("class", "selected");
	})
	.on("mouseout", function(d) {
	d3.select("#tooltip").remove();

	d3.select(this)
	.transition()
	.attr("class", function(d) { return quantize(+d.properties.POB1); })
	.duration(250)
	});


	svg.append("path")
	.datum(topojson.mesh(ca, ca.objects.states))
	.attr("class", "boundary")
	.attr("d", path);

	});

	d3.select(self.frameElement).style("height", height + "px");

	</script>