Published
Edited
Mar 17, 2020
1 star
chart = {
const svg = d3.create("svg")
.attr("viewBox", [0, 0, 975, 610])
.attr("stroke-linecap", "round")
.attr("stroke-linejoin", "round");
fnGeoProjection.fitExtent(
[[0, 0],[width, height]],
topojson.feature(europe, europe.objects.nutsrg)
)
svg.selectAll("path")
.data(topojson.feature(europe, europe.objects.nutsrg).features)
.enter()
.append("path")
.attr("fill", d =>
d.properties.id in mapping && mapping[d.properties.id].change
? fnColor(mapping[d.properties.id].change)
: '#aaa'
)
.attr("d", fnGeoPath)
.on("mouseover", fnOver)
.on("mouseout", fnOut)
function capitalizeFirstLetter(string) {
return string.charAt(0).toUpperCase() + string.slice(1);
}
const text = svg.append("text")
.attr("fill", "black")
.attr("text-anchor", "middle")
.attr("font-family", "sans-serif")
.attr("font-size", "18px")
.style("pointer-events", "none")
.attr("opacity", 0)
function fnOver(d) {
d3.select(this).attr('fill-opacity', 0.4)
const v = mapping[d.properties.id].change
text.text(`${capitalizeFirstLetter(d.properties.na.toLowerCase())}: ${v ? d3.format("+.1%")(v) : '?%'}`)
.transition()
.attr("opacity", 1)
}
function fnOut() {
d3.select(this).attr('fill-opacity', null)
text.transition().attr("opacity", 0)
}
function fnMove() {
const p = d3.mouse(this)
text.attr('x', p[0])
.attr('y', p[1] - 20)
}
svg.on("mousemove", fnMove)
svg.append("path")
.attr("fill", "none")
.attr("stroke", "#222")
.attr("stroke-width", 0.5)
.style("pointer-events", "none")
.attr("d", fnGeoPath(topojson.mesh(europe, europe.objects.nutsrg)))
return svg.node();
}
fnGeoProjection = d3.geoMercator()
fnGeoPath = d3.geoPath(fnGeoProjection)
width = 975
height = 610
mapping = Object.keys(bedsData.dimension.geo.category.index)
.reduce((acc, key, i) => {
const arr = Object.values(bedsData.dimension.time.category.index)
.map((j, _, times) => bedsData.value[ i * times.length + j])
.filter((_, j, values) => j === 0 || j === 10) // first and 11th -> 2007 and 2017
return {
...acc,
[key]: {
change: arr[0] && arr[1] ? (arr[1] - arr[0]) / arr[0] : null,
arr
}
}
}, {})
fnColor = d3.scaleDiverging(d3.interpolateRdYlGn)
.domain([
d3.min(Object.values(mapping), d => d.change),
0,
d3.max(Object.values(mapping), d => d.change)
])
fnColor(0)
bedsData = await d3.json('https://ec.europa.eu/eurostat/wdds/rest/data/v2.1/json/en/' +
'hlth_rs_bds?filterNonGeo=1&precision=1&sinceTimePeriod=2007&unit=P_HTHAB&unitLabel=code&facility=HBEDT')
europe = await d3.json('https://raw.githubusercontent.com/eurostat/Nuts2json/master/2016/4258/20M/0.json')
topojson = require('topojson@3')
d3 = require('d3@5')
import {legend} from "@d3/color-legend"
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