The 16 federal states of Germany. Practise and see if you can remind their names.
Inspired by Mike Bostock 'click-to-zoom via transform' US map
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <style> | |
| .background { | |
| fill: none; | |
| /*fill: rgb(239, 237, 245);*/ | |
| stroke: black; | |
| stroke-width: 3.5px; | |
| pointer-events: all; | |
| } | |
| #states .inactive{ | |
| fill: rgb(188, 189, 220); | |
| stroke: #fff; | |
| stroke-width: 1.25px; | |
| opacity: 0.85; | |
| } | |
| #states .active { | |
| /*fill: lightblue;*/ | |
| fill: rgb(117, 107, 177); | |
| } | |
| .graticuleLine { | |
| fill: none; | |
| stroke: #777; | |
| stroke-width: 0.5px; | |
| } | |
| </style> | |
| </body> | |
| <script> | |
| var width = 960, | |
| height = 500, | |
| focused = null, | |
| geoPath; | |
| var svg = d3.select("body") | |
| .append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| svg.append("rect") | |
| .attr("class", "background") | |
| .attr("width", width) | |
| .attr("height", height); | |
| var g = svg.append("g") | |
| .append("g") | |
| .attr("id", "states"); | |
| d3.json("./dataBundesLander.json", function(collection) { | |
| var bounds = d3.geo.bounds(collection), | |
| bottomLeft = bounds[0], | |
| topRight = bounds[1], | |
| rotLong = -(topRight[0]+bottomLeft[0])/2; | |
| center = [(topRight[0]+bottomLeft[0])/2+rotLong, (topRight[1]+bottomLeft[1])/2], | |
| //default scale projection | |
| projection = d3.geo.albers() | |
| .parallels([bottomLeft[1],topRight[1]]) | |
| .rotate([rotLong,0,0]) | |
| .translate([width/2,height/2]) | |
| .center(center), | |
| bottomLeftPx = projection(bottomLeft), | |
| topRightPx = projection(topRight), | |
| scaleFactor = 1.00*Math.min(width/(topRightPx[0]-bottomLeftPx[0]), height/(-topRightPx[1]+bottomLeftPx[1])), | |
| projection = d3.geo.albers() | |
| .parallels([bottomLeft[1],topRight[1]]) | |
| .rotate([rotLong,0,0]) | |
| .translate([width/2,height/2]) | |
| .scale(scaleFactor*0.975*1000) | |
| //.scale(4*1000) //1000 is default for USA map | |
| .center(center); | |
| geoPath = d3.geo.path().projection(projection); | |
| var graticule = d3.geo.graticule() | |
| .step([1, 1]); | |
| g.selectAll("path") | |
| .data(collection.features) | |
| .enter() | |
| .append("path") | |
| .attr("d", geoPath) | |
| .classed("inactive", 1) | |
| .on("click", clickPath); | |
| console.log("d3.json: bounds = "+bounds); | |
| console.log("d3.json: bottomLeft = "+bottomLeft); | |
| console.log("d3.json: topRight = "+topRight); | |
| console.log("d3.json: center = "+center); | |
| console.log("d3.json: projection(center) = "+projection(center)); | |
| console.log("d3.json: projection(bottomLeft) = "+projection(bottomLeft)); | |
| console.log("d3.json: projection(topRight) = "+projection(topRight)); | |
| console.log("d3.json: topRightPx = "+topRightPx); | |
| console.log("d3.json: bottomLeftPx = "+bottomLeftPx); | |
| console.log("d3.json: scaleFactor x axis = "+width/(topRightPx[0]-bottomLeftPx[0])); | |
| console.log("d3.json: scaleFactor y axis = "+height/(-topRightPx[1]+bottomLeftPx[1])); | |
| console.log("d3.json: scaleFactor = "+scaleFactor); | |
| }); | |
| function clickPath(d) { | |
| var x = width/2, | |
| y = height/2, | |
| k = 1, | |
| name = d.properties.NAME_1; | |
| g.selectAll("text") | |
| .remove(); | |
| if ((focused === null) || !(focused === d)) { | |
| var centroid = geoPath.centroid(d), | |
| x = +centroid[0], | |
| y = +centroid[1], | |
| k = 1.75; | |
| focused = d; | |
| g.append("text") | |
| .text(name) | |
| .attr("x", x) | |
| .attr("y", y) | |
| .style("text-anchor","middle") | |
| .style("font-size","8px") | |
| .style("stroke-width","0px") | |
| .style("fill","black") | |
| .style("font-family","Times New Roman") | |
| .on("click", clickText); | |
| } else { | |
| focused = null; | |
| }; | |
| g.selectAll("path") | |
| .classed("active", focused && function(d) { return d === focused; }); | |
| g.transition() | |
| .duration(1000) | |
| .attr("transform", "translate("+ (width/2) +","+ (height/2) +")scale("+ k +")translate("+ (-x) +","+ (-y) +")") | |
| .style("stroke-width", 1.25/k +"px"); | |
| } | |
| function clickText(d) { | |
| focused = null; | |
| g.selectAll("text") | |
| .remove(); | |
| g.selectAll("path") | |
| .classed("active", 0); | |
| g.transition() | |
| .duration(1000) | |
| .attr("transform", "scale("+1+")translate("+0+","+0+")") | |
| .style("stroke-width", 1.25+"px"); | |
| } | |
| </script> | |
| </body> |
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