polylines = topojson.feature(usMap, usMap.objects.counties).features
.filter(d => !isNaN(path.centroid(d)[1]))
.sort((a,b) => path.centroid(a)[1] - path.centroid(b)[1])
index = new Map(confirmedUSLatest.map(d => [d.fips, d]))
nation = topojson.feature(usMap, "nation")
countiesMesh = topojson.mesh(usMap, usMap.objects.counties, (a, b) => a !== b)
statesMesh = topojson.mesh(usMap, usMap.objects.states, (a, b) => a !== b)
counties = topojson.feature(usMap, usMap.objects.counties).features
async function drawUSMap(svg) {
svg
.append("path")
.datum(nation)
.attr("fill", "#f3f3f3")
.attr("d", path);
svg
.append("path")
.datum(countiesMesh)
.attr("fill", "none")
.attr("stroke", '#e6e6e6')
.attr("stroke-width", .5)
.attr("stroke-linejoin", "round")
.attr("d", path);
svg
.append("path")
.datum(statesMesh)
.attr("fill", "none")
.attr("stroke", '#bdbdbd')
.attr("stroke-width", .5)
.attr("stroke-linejoin", "round")
.attr("d", path);
}
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
