118 lines
3.1 KiB
HTML
118 lines
3.1 KiB
HTML
<html>
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<head>
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<style>
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#vis {
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margin: 0;
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padding: 0;
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text-align: center;
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font-family: sans-serif;
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font-size: 10pt;
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}
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</style>
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</head>
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<body>
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<div id="vis"></div>
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<script src="d3.min.js"></script>
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<script src="../build/d3-hexjson.js"></script>
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<script>
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// d3.json("example-boundary.hexjson", function(error, hexjson) {
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d3.json("constituencies.hexjson", function(error, hexjson) {
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// Set the size and margins of the svg
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var margin = {top: 10, right: 10, bottom: 10, left: 10},
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width = 500 - margin.left - margin.right,
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height = 420 - margin.top - margin.bottom;
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// Create the svg element
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var svg = d3
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.select("#vis")
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.append("svg")
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.attr("width", width + margin.left + margin.right)
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.attr("height", height + margin.top + margin.bottom)
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.append("g")
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.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
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// Create the grid hexes and render them
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var grid = d3.getGridForHexJSON(hexjson);
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var gridHexes = d3.renderHexJSON(grid, width, height);
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// Render the data hexes
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var hexes = d3.renderHexJSON(hexjson, width, height);
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// Generate points along the boundaries which differ according to a specified
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// field:
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// - for the example-boundary.hexjson file, "prov"
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// - for the constituencies.hexjson file, "u"
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// var boundarySegments = d3.getBoundarySegmentsForHexJSON(hexjson, width, height, "prov");
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var boundarySegments = d3.getBoundarySegmentsForHexJSON(hexjson, width, height, "u");
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// Draw the background grid BEFORE the data
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// Bind the grid hexes to g.grid elements of the svg and position them
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var hexgrid = svg
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.selectAll("g.grid")
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.data(gridHexes)
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.enter()
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.append("g")
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.attr("transform", function(hex) {
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return "translate(" + hex.x + "," + hex.y + ")";
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});
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// Draw the polygons around each grid hex's centre
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hexgrid
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.append("polygon")
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.attr("points", function(hex) {return hex.points;})
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.attr("stroke", "#b0b0b0")
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.attr("stroke-width", "1")
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.attr("fill", "#f0f0f0");
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// Bind the data hexes to g.data elements of the svg and position them
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var hexmap = svg
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.selectAll("g.data")
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.data(hexes)
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.enter()
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.append("g")
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.attr("transform", function(hex) {
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return "translate(" + hex.x + "," + hex.y + ")";
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});
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// Draw the polygons around each data hex's centre
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hexmap
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.append("polygon")
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.attr("points", function(hex) {return hex.points;})
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.attr("stroke", "white")
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.attr("stroke-width", "2")
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.attr("fill", "#b0e8f0");
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// Add the codes for the data hexes as labels
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// Disabled for the UK constiuencies map
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// hexmap
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// .append("text")
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// .append("tspan")
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// .attr("text-anchor", "middle")
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// .attr("fill", "#111111")
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// .text(function(hex) {return hex.key + " " + hex.prov;});
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// Draw boundary lines
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var boundaryLines = svg
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.selectAll("g.lines")
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.data(boundarySegments)
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.enter()
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.append("line")
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.attr("x1", function(d) { return d.x1;})
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.attr("y1", function(d) { return d.y1;})
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.attr("x2", function(d) { return d.x2;})
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.attr("y2", function(d) { return d.y2;})
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.attr("stroke", "blue")
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.attr("stroke-width", 2)
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.attr("stroke-linecap", "round")
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.attr("fill", "none");
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});
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</script>
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</body>
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</html>
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