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September 12, 2016 04:20
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NY State with Counties Clipped
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .outline { | |
| fill: none; | |
| stroke: #000; | |
| stroke-width: 1.5px; | |
| } | |
| .feature { | |
| fill: #ccc; | |
| } | |
| .mesh { | |
| fill: none; | |
| stroke: #fff; | |
| stroke-width: .5px; | |
| stroke-linejoin: round; | |
| } | |
| path { | |
| fill: #ccc; | |
| stroke: #fff; | |
| stroke-width: .5px; | |
| } | |
| .county:hover{ | |
| fill:orange; | |
| } | |
| </style> | |
| <body> | |
| <script src="//d3js.org/d3.v3.min.js"></script> | |
| <script src="//d3js.org/topojson.v1.min.js"></script> | |
| <script> | |
| var width = 960, | |
| height = 500; | |
| var projection = d3.geo.albers(); | |
| /* | |
| var projection = d3.geo.transverseMercator() | |
| .rotate([120 + 30 / 60, -38 - 50 / 60]) | |
| */ | |
| var path = d3.geo.path() | |
| .projection(projection); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| d3.json("us.json", function(error, us) { | |
| if (error) throw error; | |
| var states = topojson.feature(us, us.objects.states), | |
| state = states.features.filter(function(d) { return d.id === 06; })[0]; | |
| projection.scale(1) | |
| .translate([0, 0]); | |
| var b = path.bounds(state), | |
| s = .95 / Math.max((b[1][0] - b[0][0]) / width, (b[1][1] - b[0][1]) / height), | |
| t = [(width - s * (b[1][0] + b[0][0])) / 2, (height - s * (b[1][1] + b[0][1])) / 2]; | |
| projection.scale(s) | |
| .translate(t); | |
| svg.append("path") | |
| .datum(topojson.mesh(us, us.objects.states, function(a, b) { return a !== b; })) | |
| .attr("class", "mesh") | |
| .attr("d", path); | |
| svg.append("path") | |
| .datum(state) | |
| .attr("class", "outline") | |
| .attr("d", path) | |
| .attr('id', 'land'); | |
| svg.append("clipPath") | |
| .attr("id", "clip-land") | |
| .append("use") | |
| .attr("xlink:href", "#land"); | |
| svg.selectAll("path") | |
| .data(topojson.feature(us, us.objects.counties).features) | |
| .enter().append("path") | |
| .attr("d", path) | |
| .attr('county-id', function(d){ | |
| return d.id | |
| }).attr("clip-path", "url(#clip-land)") | |
| .attr('class', 'county'); | |
| }); | |
| </script> |
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