README.md

## README.md

      
          Raw
        
        
              README.md
            
          
    Proportion of empty houses in Japan, taken from this page by @yasufumisaito but adapted to use the d3-composite-projections.

The data is originally from the Statistics Bureau at Ministry of Internal Affairs and Communications.

  
## empty.json

      
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              empty.json
            
          
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## index.html
<!DOCTYPE html>
<html lang="en">
<meta charset="utf-8">
<title>Japan empty houses</title>
<head>
	<script src="http://d3js.org/d3.v3.min.js"></script>
	<script src="http://d3js.org/topojson.v1.min.js"></script>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/d3-legend/1.7.0/d3-legend.min.js"></script>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/d3-composite-projections/0.3.5/conicEquidistantJapan.min.js"></script>
	<style>
	body, html {
			color:#c2b59b;
			background-color: #191919;
			margin:0;
			padding:0;
		}

		svg {
			background-color: #2f2f2f;
			border-radius: 10px
		}

		 /* Styling for new <div> */
		#tooltip {
			position: absolute;
			top: 0;
			left: 0;
			z-index: 10;
			margin: 0;
			padding: 10px;
			width: 200px;
			height: 70px;
			color: white;
			font-family: sans-serif;
			font-size: 1.2em;
			font-weight: bold;
			text-align: center;
			background-color: rgba(0, 0, 0, 0.55);
			opacity: 0;
			pointer-events: none;
			border-radius:5px;
			transition: .2s;
		}

		.legendLinear
		 {
			font-family: "Lato";
			fill:#c2b59b;
		}

		.legendTitle {
			font-size: 1em;
		}

		span {
			color:#fac863;
			font-weight: bold;
			/*font-size:1.5em;*/
		}

		a {
			text-decoration:underline;
			color:#c2b59b;
		}

	</style>
	<link href='https://fonts.googleapis.com/css?family=Lato:900,400,300' rel='stylesheet' type='text/css'>
</head>
<body>
<div id="container">
		<div id="tooltip">
		</div>
	</div>
<script>
var w = 700,
		h = 600;

	var svg = d3.select("#container").append("svg")
								.attr("width", w)
								.attr("height", h);

	d3.json("empty.json", function (error, json) {

		var japan = topojson.feature(json, json.objects.japan).features;

    	/*var projection = d3.geo.mercator()
					        .center([137, 37])
					        .translate([w/2, h/2])
					        .scale(2500);*/

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


		var color = d3.scale.linear()
							.domain([9, 12, 16, 19, 22
								])
							.range(["#feebe2", "#fbb4b9","#f768a1","#c51b8a","#7a0177"]);

		svg.selectAll("path")
			.data(japan)
			.enter()
			.append("path")
			.attr("d", path)
			.attr("stroke", "#ccc")
			.attr("stroke-width", .3)
			.attr("fill", function(d, i){

				return color(d.properties.empty);
			})
			.on("mouseover", function(d){
				//Show the tooltip
				var x = d3.event.pageX;
				var y = d3.event.pageY - 40;

				d3.select("#tooltip")
					.style("left", x + "px")
					.style("top", y + "px")
					.style("opacity", 1)
					.text( d.properties.empty + " % of the houses in " + d.id + " are vacant.");
			})
			.on("mouseout", function(){
				//Hide the tooltip
				d3.select("#tooltip")
					.style("opacity", 0);
			});

		svg
    	.append("path")
      .style("fill","none")
      .style("stroke","#000")
      .attr("d", projection.getCompositionBorders());

	});
	//Create the Legend

		var linear = d3.scale.linear()
						.domain([9, 12, 16, 19, 22])
						.range(["#feebe2", "#fbb4b9","#f768a1","#c51b8a","#7a0177"]);
		d3.select("svg").append("g")
			.attr("class", "legendLinear")
			.attr("transform", "translate(200,500)");

		var legendLinear = d3.legend.color()
								.title("Proportion of empty home (%)")
								.shapeHeight(20)
								.shapeWidth(60)
								.shapeRadius(10)
								.cells([9, 12, 16, 19, 22])
								.orient("horizontal")
								.labelAlign("start")
								.scale(linear);

		svg.select(".legendLinear")
			.call(legendLinear);
</script>

## thumbnail.png

      
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              thumbnail.png