Based on a block by Mike Bostock. Click and drag to paint! Click on the colors or use the number keys to change colors. Copy-and-paste the address bar to share this map with others. Use a tool like SVG Crowbar to download a vector image.
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Paint by numbers: diverging Colorbrewer edition
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| license: gpl-3.0 |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| path { | |
| stroke-linejoin: round; | |
| stroke-linecap: round; | |
| } | |
| .background { | |
| fill: none; | |
| stroke: #ddd; | |
| } | |
| .foreground { | |
| fill: none; | |
| pointer-events: all; | |
| } | |
| </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 = 600; | |
| var projection = d3.geo.albersUsa() | |
| .scale(1280) | |
| .translate([width / 2, height / 2]); | |
| var path = d3.geo.path() | |
| .projection(projection); | |
| var color = d3.scale.ordinal().domain(d3.range(9)).range([ | |
| '#555555', | |
| '#d73027', | |
| '#f46d43', | |
| '#fdae61', | |
| '#fee090', | |
| '#e0f3f8', | |
| '#abd9e9', | |
| '#74add1', | |
| '#4575b4']), | |
| selectedColor = 0, | |
| dragColor; | |
| var components = color.domain().map(function() { return []; }); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| var legend = svg.append("g") | |
| .attr("class", "legend") | |
| .attr("transform", "translate(" + ((width - color.domain().length * 24) / 2) + ",10)") | |
| .style("cursor", "pointer") | |
| .selectAll("rect") | |
| .data(color.domain()) | |
| .enter().append("rect") | |
| .attr("x", function(d) { return d * 24; }) | |
| .attr("width", 24 - 3) | |
| .attr("height", 24 - 3) | |
| .style("stroke", function(d) { return d ? null : "#000"; }) | |
| .style("fill", color) | |
| .on("click", clicklegend); | |
| d3.select(self) | |
| .on("keydown", keydown) | |
| .node().focus(); | |
| d3.json("/mbostock/raw/4090846/us.json", function(error, us) { | |
| if (error) throw error; | |
| var bisectId = d3.bisector(function(d) { return d.id; }).left; | |
| var features = topojson.feature(us, us.objects.states).features; | |
| svg.append("path") | |
| .datum(topojson.mesh(us, us.objects.states)) | |
| .attr("class", "background") | |
| .attr("d", path); | |
| var merge = svg.append("g") | |
| .attr("class", "merge") | |
| .selectAll("path") | |
| .data(components) | |
| .enter().append("path") | |
| .style("fill", function(d, i) { return color(i); }) | |
| .style("stroke", function(d, i) { return d3.lab(color(i)).darker(); }); | |
| svg.append("g") | |
| .attr("class", "foreground") | |
| .style("cursor", "pointer") | |
| .style("stroke-opacity", .5) | |
| .selectAll("path") | |
| .data(features) | |
| .enter().append("path") | |
| .attr("d", function(d) { d.color = null; return path(d); }) | |
| .on("mouseover", function() { this.style.stroke = "black"; }) | |
| .on("mouseout", function() { this.style.stroke = "none"; }) | |
| .call(d3.behavior.drag() | |
| .on("dragstart", dragstart) | |
| .on("drag", drag)); | |
| top.location.hash.split("").slice(1, features.length).forEach(function(c, i) { | |
| if ((c = +c) >= 0 && c < 10) assign(features[i], c ? c - 1 : null); | |
| }); | |
| redraw(); | |
| function dragstart() { | |
| var feature = d3.event.sourceEvent.target.__data__; | |
| if (assign(feature, dragColor = feature.color === selectedColor ? null : selectedColor)) redraw(); | |
| } | |
| function drag() { | |
| var feature = d3.event.sourceEvent.target.__data__; | |
| if (feature && assign(feature, dragColor)) redraw(); | |
| } | |
| function assign(feature, color) { | |
| if (feature.color === color) return false; | |
| if (feature.color !== null) { | |
| var component = components[feature.color]; | |
| component.splice(bisectId(component, feature.id), 1); | |
| feature.color = null; | |
| } | |
| if (color !== null) { | |
| var component = components[color]; | |
| component.splice(bisectId(component, feature.id), 0, feature); | |
| feature.color = color; | |
| } | |
| return true; | |
| } | |
| function redraw() { | |
| merge.data(components).attr("d", function(d) { return path({type: "FeatureCollection", features: d}) || "M0,0"; }); | |
| top.history.replaceState(null, null, "#" + features.map(function(d) { return d.color === null ? "0" : d.color + 1; }).join("")); | |
| } | |
| }); | |
| function clicklegend(d) { | |
| legend[0][selectedColor].style.stroke = null; | |
| legend[0][selectedColor = d].style.stroke = "#000"; | |
| } | |
| function keydown() { | |
| if (d3.event.keyCode >= 48 && d3.event.keyCode < 58) { | |
| var i = d3.event.keyCode - 49; | |
| if (i < 0) i = 10; | |
| clicklegend(i); | |
| } | |
| } | |
| d3.select(self.frameElement).style("height", height + "px"); | |
| </script> |
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