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
Last active
June 13, 2022 19:20
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Interactive map of the 16 federal states of Germany
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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 { | |
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.append("path") | |
.datum(graticule) | |
.attr("class", "graticuleLine") | |
.attr("d", geoPath); | |
g.selectAll("path.feature") | |
.data(collection.features) | |
.enter() | |
.append("path") | |
.attr("class", "feature") | |
.attr("d", geoPath) | |
.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", 1.75/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", 1.00+"px"); | |
} | |
</script> | |
</body> |
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Indeed. Just fixed it.
Thx for pointing it out.
Happy if this piece of code can help.