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USJSon
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| <!DOCTYPE html> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script src="https://d3js.org/topojson.v2.min.js"></script> | |
| <script> | |
| var w = 960, | |
| h = 600; | |
| var projection = d3.geoAlbersUsa(); | |
| var path = d3.geoPath().projection(projection) | |
| d3.json("https://bl.ocks.org/Andrew-Reid/raw/ddcda63d769f8e1d61fa5105346f983f/counties.json", function(error, us) { | |
| if (error) throw error; | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", w) | |
| .attr("height", h); | |
| svg.selectAll("path") | |
| .data(topojson.feature(us, us.objects.states).features) | |
| .enter().append("path") | |
| .attr("class", "states") | |
| .attr("d", path); | |
| svg.append("path") | |
| .attr("class", "state-borders") | |
| .attr("d", path(topojson.mesh(us, us.objects.states))) | |
| svg.append("path") | |
| .attr("class", "county-borders") | |
| .attr("d", path(topojson.mesh(us, us.objects.counties))); | |
| aa = [-122.490402, 37.786453]; | |
| bb = [-122.389809, 37.72728]; | |
| svg.selectAll("circle") | |
| .data([aa,bb]).enter() | |
| .append("circle") | |
| .attr("cx", function (d) { return projection(d)[0]; }) | |
| .attr("cy", function (d) { return projection(d)[1]; }) | |
| .attr("r", "8px") | |
| .attr("fill", "red") | |
| }); | |
| </script> |
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