An example of a zoomable choropleth made with spam.js, this time with a tooltip, a legend and a quantile scale.
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Spam.js Choropleth IV
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| license: mit | |
| height: 650 | |
| border: none |
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| <!DOCTYPE html> | |
| <meta charset="utf-8" /> | |
| <style> | |
| body { | |
| max-width: 960px; | |
| position: relative; | |
| } | |
| .tooltip { | |
| position: absolute; | |
| width: 200px; | |
| height: 60px; | |
| padding: 8px; | |
| background: rgb(255,255,255); | |
| font-family: "Helvetica Neue", "Helvetica", Arial sans-serif; | |
| font-size: 12px; | |
| border: 1px solid rgba(0,0,0,0.2); | |
| box-shadow: 0 3px 5px rgba(0,0,0,0.5),0 0 0 1px rgba(0,0,0,.08); | |
| border-radius: 2px; | |
| pointer-events: none; | |
| } | |
| .g-place { | |
| border-bottom: 1px solid rgb(130,130,130); | |
| padding-bottom: 3px; | |
| margin-bottom: 5px; | |
| } | |
| .g-headline { | |
| font-size: 16px; | |
| } | |
| .g-sub { | |
| color: rgb(130,130,130); | |
| } | |
| .g-value { | |
| float: right; | |
| } | |
| .legend { | |
| position: absolute; | |
| background: rgba(255,255,255,0.5); | |
| right: 0; | |
| top: 0; | |
| font-family: "Helvetica Neue",sans-serif; | |
| font-size: 12px; | |
| display: block; | |
| padding: 10px; | |
| height: 65px; | |
| width: 100px; | |
| } | |
| </style> | |
| <body> | |
| <script src="https://d3js.org/d3.v3.min.js" charset="utf-8"></script> | |
| <script src="https://d3js.org/topojson.v1.min.js"></script> | |
| <script src="https://unpkg.com/rbush@1.4.3/rbush.js"></script> | |
| <script src="https://unpkg.com/d3-svg-legend@1.13.0/d3-legend.min.js"></script> | |
| <script src="https://unpkg.com/spamjs@1.1.0/spam.min.js"></script> | |
| <script type='text/javascript'> | |
| var mouseX, mouseY; | |
| var hover = null; | |
| var color = d3.scale | |
| .quantile() | |
| .range(["#f0f9e8", "#bae4bc", "#7bccc4", "#43a2ca", "#0868ac"]); | |
| d3 | |
| .select("body") | |
| .append("svg") | |
| .attr("class", "legend"); | |
| var legend = d3.legend | |
| .color() | |
| .shapeHeight(10) | |
| .shapeWidth(30) | |
| .shapePadding(3) | |
| .labelOffset(5) | |
| .orient("vertical") | |
| .labelAlign("start"); | |
| var tooltip = d3 | |
| .select("body") | |
| .append("div") | |
| .attr("class", "tooltip") | |
| .style("opacity", 0); | |
| document.onmousemove = handleMouseMove; | |
| function handleMouseMove(event) { | |
| mouseX = event.pageX; | |
| mouseY = event.pageY; | |
| tooltip.style("left", mouseX - 100 + "px").style("top", mouseY + 25 + "px"); | |
| } | |
| d3.json("bcn.json", function(error, d) { | |
| d3.json("districtes.json", function(error, districtes) { | |
| topojson.presimplify(d); | |
| topojson.presimplify(districtes); | |
| color.domain( | |
| d3.extent(d.objects["seccio-censal"].geometries, function(d) { | |
| return d.properties.rate; | |
| }) | |
| ); | |
| legend.scale(color); | |
| d3.select(".legend").call(legend); | |
| var map = new ZoomableCanvasMap({ | |
| element: "body", | |
| zoomScale: 0.8, | |
| projection: d3.geo | |
| .mercator() | |
| .center([29.6, 30.47]) | |
| .scale(250000) | |
| .rotate([0, 0, -37.6]), | |
| width: 960, | |
| height: 650, | |
| data: [ | |
| { | |
| features: topojson.feature(d, d.objects["seccio-censal"]), | |
| static: { | |
| paintfeature: function(parameters, d) { | |
| parameters.context.fillStyle = color(d.properties.rate); | |
| parameters.context.fill(); | |
| } | |
| }, | |
| dynamic: { | |
| postpaint: function(parameters) { | |
| if (!hover) { | |
| tooltip.style("opacity", 0); | |
| return; | |
| } | |
| parameters.context.beginPath(); | |
| parameters.context.lineWidth = 1 / parameters.scale; | |
| parameters.path(hover); | |
| parameters.context.stroke(); | |
| tooltip | |
| .style("opacity", 1) | |
| .html( | |
| "<div class='g-place'>" + | |
| "<span class='g-headline'>" + | |
| hover.properties.districte + | |
| "</span><br />" + | |
| "<span class='g-sub'>" + | |
| hover.properties.barri + | |
| "</span>" + | |
| "</div>" + | |
| "<span>Birth rate</span>" + | |
| "<span class='g-value'>" + | |
| hover.properties.rate + | |
| "‰</span>" | |
| ); | |
| } | |
| }, | |
| events: { | |
| hover: function(parameters, d) { | |
| hover = d; | |
| parameters.map.paint(); | |
| } | |
| } | |
| }, | |
| { | |
| features: topojson.feature( | |
| districtes, | |
| districtes.objects["districtes"] | |
| ), | |
| static: { | |
| paintfeature: function(parameters, d) { | |
| parameters.context.lineWidth = 1 / parameters.scale; | |
| parameters.context.strokeStyle = "rgb(70,70,70)"; | |
| parameters.context.stroke(); | |
| } | |
| }, | |
| events: { | |
| click: function(parameters, d) { | |
| parameters.map.zoom(d); | |
| } | |
| } | |
| } | |
| ] | |
| }); | |
| map.init(); | |
| }); | |
| }); | |
| </script> |
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