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Choropleth U.S. county map
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Independent Farms by County - Choropleth</title> | |
| <script type="text/javascript" src="http://d3js.org/d3.v3.min.js"></script> | |
| <script type="text/javascript" src="http://d3js.org/queue.v1.min.js"></script> | |
| <script type="text/javascript" src="http://d3js.org/topojson.v1.min.js"></script> | |
| </head> | |
| <!-- CSS --> | |
| <style> | |
| path { | |
| stroke:white; | |
| stroke-width: 1px; | |
| } | |
| body { | |
| font-family: 'Proxima Nova', sans-serif; | |
| } | |
| .county { | |
| font: 14px sans-serif; | |
| font-weight: bold; | |
| } | |
| .legend { | |
| font-size: 14px; | |
| font-family: 'Proxima Nova', sans-serif; | |
| } | |
| .legend_title { | |
| font-size: 14px; | |
| font-family: 'Proxima Nova', sans-serif; | |
| font-weight: bold; | |
| } | |
| div.tooltip { | |
| position: absolute; | |
| left: 75px; | |
| text-align: center; | |
| height: 16px; | |
| padding: 10px; | |
| font-size: 14px; | |
| background: #FFFFFF; | |
| border: 1px solid #989898; | |
| pointer-events: none; | |
| } | |
| p { | |
| font-family: 'Proxima Nova', sans-serif; | |
| font-size:10px; | |
| margin: 20px 0 0 10px; | |
| } | |
| @media (max-width: 400px) { | |
| .d3map { | |
| display: none; | |
| } | |
| } | |
| </style> | |
| <body> | |
| <h1>Independent Farms in the USA</h1> | |
| <script type="text/javascript"> | |
| var width = 960, height = 600; | |
| var color_domain = [500, 1000, 1500, 2000, 2500, 3000, 3500, 4000, 4500, 5000, 5500, 6000] | |
| var ext_color_domain = [0, 500, 1000, 1500, 2000, 2500, 3000, 3500, 4000, 4500, 5000, 5500, 6000] | |
| var legend_labels = ["< 500", "500+", "1000+", "1500+", "2000+", "2500+", "3000+", "3500+", "4000+", "4500+", "5000+", "5500+", "6000+"] | |
| var color = d3.scale.threshold() | |
| .domain(color_domain) | |
| .range(["#dcdcdc", "#d0d6cd", "#bdc9be", "#aabdaf", "#97b0a0", "#84a491", "#719782", "#5e8b73", "#4b7e64", "#387255", "#256546", "#125937", "#004d28"]); | |
| var div = d3.select("body").append("div") | |
| .attr("class", "tooltip") | |
| .style("opacity", 0); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .style("margin", "-15px auto"); | |
| var path = d3.geo.path() | |
| queue() | |
| .defer(d3.json, "us.json") | |
| .defer(d3.csv, "https://usafactsstatic.blob.core.windows.net/public/data/covid-19/covid_confirmed_usafacts.csv") | |
| .defer(d3.csv, "https://usafactsstatic.blob.core.windows.net/public/data/covid-19/covid_county_population_usafacts.csv") | |
| .await(ready); | |
| function ready(error, us, convirmed, populations) { | |
| var pairRateWithId = {}; | |
| var pairNameWithId = {}; | |
| //Moves selction to front | |
| d3.selection.prototype.moveToFront = function() { | |
| return this.each(function(){ | |
| this.parentNode.appendChild(this); | |
| }); | |
| }; | |
| //Moves selction to back | |
| d3.selection.prototype.moveToBack = function() { | |
| return this.each(function() { | |
| var firstChild = this.parentNode.firstChild; | |
| if (firstChild) { | |
| this.parentNode.insertBefore(this, firstChild); | |
| } | |
| }); | |
| }; | |
| data.forEach(function(d) { | |
| pairRateWithId[d.id] = +d.rate; | |
| pairNameWithId[d.id] = d.name; | |
| }); | |
| svg.append("g") | |
| .attr("class", "county") | |
| .selectAll("path") | |
| .data(topojson.feature(us, us.objects.counties).features) | |
| .enter().append("path") | |
| .attr("d", path) | |
| .style ( "fill" , function (d) { | |
| return color (pairRateWithId[d.id]); | |
| }) | |
| .style("opacity", 0.8) | |
| .on("mouseover", function(d) { | |
| var sel = d3.select(this); | |
| sel.moveToFront(); | |
| d3.select(this).transition().duration(300).style({'opacity': 1, 'stroke': 'black', 'stroke-width': 1.5}); | |
| div.transition().duration(300) | |
| .style("opacity", 1) | |
| div.text(pairNameWithId[d.id] + ": " + pairRateWithId[d.id]) | |
| .style("left", (d3.event.pageX) + "px") | |
| .style("top", (d3.event.pageY -30) + "px"); | |
| }) | |
| .on("mouseout", function() { | |
| var sel = d3.select(this); | |
| sel.moveToBack(); | |
| d3.select(this) | |
| .transition().duration(300) | |
| .style({'opacity': 0.8, 'stroke': 'white', 'stroke-width': 1}); | |
| div.transition().duration(300) | |
| .style("opacity", 0); | |
| }) | |
| }; | |
| var legend = svg.selectAll("g.legend") | |
| .data(ext_color_domain) | |
| .enter().append("g") | |
| .attr("class", "legend"); | |
| var ls_w = 73, ls_h = 20; | |
| legend.append("rect") | |
| .attr("x", function(d, i){ return width - (i*ls_w) - ls_w;}) | |
| .attr("y", 550) | |
| .attr("width", ls_w) | |
| .attr("height", ls_h) | |
| .style("fill", function(d, i) { return color(d); }) | |
| .style("opacity", 0.8); | |
| legend.append("text") | |
| .attr("x", function(d, i){ return width - (i*ls_w) - ls_w;}) | |
| .attr("y", 590) | |
| .text(function(d, i){ return legend_labels[i]; }); | |
| var legend_title = "Number of independent farms"; | |
| svg.append("text") | |
| .attr("x", 10) | |
| .attr("y", 540) | |
| .attr("class", "legend_title") | |
| .text(function(){return legend_title}); | |
| </script> | |
| <p>Source: U.S. Census</p> | |
| </body> | |
| </html> |
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