Click and drag to move states around.
So, what happens when you use the Delaunay triangulation to compute links between the centroids of the lower 48 United States of America? And then you simulate the whole thing as a force-directed graph? This, it turns out! Built with D3.js.
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Force-Directed States of America</title> | |
| <script type="text/javascript" src="http://mbostock.github.com/d3/d3.js?1.26.0"></script> | |
| <script type="text/javascript" src="http://mbostock.github.com/d3/d3.geo.js?1.26.0"></script> | |
| <script type="text/javascript" src="http://mbostock.github.com/d3/d3.geom.js?1.26.0"></script> | |
| <script type="text/javascript" src="http://mbostock.github.com/d3/d3.layout.js?1.26.0"></script> | |
| <style type="text/css"> | |
| path { | |
| fill: #ddd; | |
| fill-opacity: .8; | |
| stroke: #fff; | |
| stroke-width: 1.5px; | |
| } | |
| line { | |
| stroke: #999; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script type="text/javascript"> | |
| var w = 960, | |
| h = 500; | |
| var path = d3.geo.path(), | |
| force = d3.layout.force().size([w, h]); | |
| var svg = d3.select("body").append("svg:svg") | |
| .attr("width", w) | |
| .attr("height", h); | |
| d3.json("readme.json", function(states) { | |
| var nodes = [], | |
| links = []; | |
| states.features.forEach(function(d, i) { | |
| if (d.id == "02" || d.id == "15" || d.id == "72") return; // lower 48 | |
| var centroid = path.centroid(d); | |
| centroid.x = centroid[0]; | |
| centroid.y = centroid[1]; | |
| centroid.feature = d; | |
| nodes.push(centroid); | |
| }); | |
| d3.geom.delaunay(nodes).forEach(function(d) { | |
| links.push(edge(d[0], d[1])); | |
| links.push(edge(d[1], d[2])); | |
| links.push(edge(d[2], d[0])); | |
| }); | |
| force | |
| .gravity(0) | |
| .nodes(nodes) | |
| .links(links) | |
| .linkDistance(function(d) { return d.distance; }) | |
| .start(); | |
| var link = svg.selectAll("line") | |
| .data(links) | |
| .enter().append("svg:line") | |
| .attr("x1", function(d) { return d.source.x; }) | |
| .attr("y1", function(d) { return d.source.y; }) | |
| .attr("x2", function(d) { return d.target.x; }) | |
| .attr("y2", function(d) { return d.target.y; }); | |
| var node = svg.selectAll("g") | |
| .data(nodes) | |
| .enter().append("svg:g") | |
| .attr("transform", function(d) { return "translate(" + -d.x + "," + -d.y + ")"; }) | |
| .call(force.drag) | |
| .append("svg:path") | |
| .attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; }) | |
| .attr("d", function(d) { return path(d.feature); }); | |
| force.on("tick", function(e) { | |
| link.attr("x1", function(d) { return d.source.x; }) | |
| .attr("y1", function(d) { return d.source.y; }) | |
| .attr("x2", function(d) { return d.target.x; }) | |
| .attr("y2", function(d) { return d.target.y; }); | |
| node.attr("transform", function(d) { | |
| return "translate(" + d.x + "," + d.y + ")"; | |
| }); | |
| }); | |
| }); | |
| function edge(a, b) { | |
| var dx = a[0] - b[0], dy = a[1] - b[1]; | |
| return { | |
| source: a, | |
| target: b, | |
| distance: Math.sqrt(dx * dx + dy * dy) | |
| }; | |
| } | |
| </script> | |
| </body> | |
| </html> |
I also tried to replicate it with data of Peru but is not showing, I'm having problems to assign "d" attribute with path(d.feature) to nodes data.
Hey there Mr Bostock, I tried to replicate this map with data of my own country and it's not working as it should, can you take a look at my code if it's not too much trouble?
Force Directed graph of Jamaica
Blocks preview