The number of CCTV cameras by region in Seoul, Korea

<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Scale and Axis</title>
	<script src="https://d3js.org/d3.v3.min.js" charset="utf-8"></script>
	<style type="text/css">
			
			body {
				background-color: white;
				font-family: Helvetica, Arial, sans-serif;
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h1 {
				font-size: 24px;
				margin: 0;
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p {
				font-size: 14px;
				margin: 10px 0 0 0;
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svg {
				background-color: white;
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rect:hover {
				fill: #18709C;
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			.axis path,
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				fill: none;
				stroke: #aaaaaa;
				shape-rendering: crispEdges;
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			.axis text {
				font-family: sans-serif;
				font-size: 11px;
			}

.y.axis path,
			.y.axis line {
				opacity: 0;
			}

</style>
</head>
<body>
	<h1>The number of CCTV cameras by region in Seoul, Korea</h1>
	<script type="text/javascript">
	var w = 800;
	var h = 600;
	var padding = [ 30, 30, 30, 100 ];

var widthScale = d3.scale.linear()
					.range([ 0, w - padding[1] - padding[3] ]);
			
	var heightScale = d3.scale.ordinal()
					.rangeRoundBands([ padding[0], h - padding[2] ], 0.3);

var xAxis = d3.svg.axis()
					.scale(widthScale)
					.orient("bottom");

var yAxis = d3.svg.axis()
					.scale(heightScale)
					.orient("left");

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

d3.csv("data.csv", function(error, data) { 
	
	data.sort(function(a, b) {
					return d3.descending(+a.value, +b.value);
				});

widthScale.domain([ 0, d3.max(data, function(d) {
					return +d.value;
				}) ]);

heightScale.domain(data.map(function(d) { return d.area; } ));

var rects = svg.selectAll("rect")
								.data(data)
								.enter()
								.append("rect");

rects.attr("x", padding[3])
					.attr("y", function(d) {
						return heightScale(d.area);
					})
					.attr("width", function(d) {
						return widthScale(d.value);
					})
					.attr("height", heightScale.rangeBand())
					.attr("fill","#4DAAAB");

svg.append("g")
					.attr("class", "x axis")
					.attr("transform", "translate(" + padding[3] + "," + (h - padding[2]) + ")")
					.call(xAxis);

svg.append("g")
					.attr("class", "y axis")
					.attr("transform", "translate(" + padding[3] + ",0)")
					.call(yAxis);

var texts = svg.selectAll(".datatext")
				.data(data)
				.enter()
				.append("text");

texts.attr("x", function(d) {
					return widthScale(d.value)+ padding[3]+5;
					})
					.attr("y", function(d) {
						return heightScale(d.area)+10;
					})
					.attr("fill","#777777")
					.text(function(d) { return d.value;})
					.attr("font-size","11px");
	});
	</script>
</body>
</html>

Modified http://d3js.org/d3.v3.min.js to a secure url

https://d3js.org/d3.v3.min.js