d3-hexjson
Version:
Generate hexmaps from data that uses the Open Data Institute's HexJSON format.
92 lines (80 loc) • 2.25 kB
HTML
<html>
<head>
<style>
#vis {
margin: 0;
padding: 0;
text-align: center;
font-family: sans-serif;
font-size: 10pt;
}
</style>
</head>
<body>
<div id="vis"></div>
<script src="d3.min.js"></script>
<script src="../build/d3-hexjson.min.js"></script>
<script>
d3.json("example-grid.hexjson", function(error, hexjson) {
// Set the size and margins of the svg
var margin = {top: 10, right: 10, bottom: 10, left: 10},
width = 500 - margin.left - margin.right,
height = 420 - margin.top - margin.bottom;
// Create the svg element
var svg = d3
.select("#vis")
.append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
// Create the grid hexes and render them
var grid = d3.getGridForHexJSON(hexjson);
var gridHexes = d3.renderHexJSON(grid, width, height);
// Render the data hexes
var hexes = d3.renderHexJSON(hexjson, width, height);
// Draw the background grid BEFORE the data
// Bind the grid hexes to g.grid elements of the svg and position them
var hexgrid = svg
.selectAll("g.grid")
.data(gridHexes)
.enter()
.append("g")
.attr("class", "grid")
.attr("transform", function(hex) {
return "translate(" + hex.x + "," + hex.y + ")";
});
// Draw the polygons around each grid hex's centre
hexgrid
.append("polygon")
.attr("points", function(hex) {return hex.points;})
.attr("stroke", "#b0b0b0")
.attr("stroke-width", "1")
.attr("fill", "#f0f0f0");
// Bind the data hexes to g.data elements of the svg and position them
var hexmap = svg
.selectAll("g.data")
.data(hexes)
.enter()
.append("g")
.attr("class", "data")
.attr("transform", function(hex) {
return "translate(" + hex.x + "," + hex.y + ")";
});
// Draw the polygons around each data hex's centre
hexmap
.append("polygon")
.attr("points", function(hex) {return hex.points;})
.attr("stroke", "white")
.attr("stroke-width", "2")
.attr("fill", "#b0e8f0");
// Add the codes for the data hexes as labels
hexmap
.append("text")
.append("tspan")
.attr("text-anchor", "middle")
.text(function(hex) {return hex.key;});
});
</script>
</body>
</html>