Published unlisted
Edited
May 29, 2020
data = fetch(
"https://raw.githubusercontent.com/vega/vega/master/docs/data/annual-precip.json"
).then(d => d.json())
{
const svg = d3.create("svg").attr("viewBox", [0, 0, 960, 600]);
const path = d3.geoPath(projection);
yield svg.node();
svg
.append("g")
.selectAll("path")
.data(contours)
.join("path")
.attr("d", path)
.attr("fill", d => color(d.value));
svg
.append("g")
.append("path")
.datum(land)
.attr("fill", "none")
.attr("stroke", "black")
.attr("stroke-width", .5)
.attr("d", path);
}
projection = d3.geoAzimuthalEqualArea().rotate([-180, 243, 178])
contours = d3
.contours()
.thresholds(10)
.size([data.width, data.height])(data.values.map(d => Math.min(3000, d)))
.map(d => {
d.coordinates.forEach(p =>
p.forEach(ring =>
ring.reverse().forEach(point => {
point[0] *= data.scale[0];
point[1] *= data.scale[1];
point[0] += data.translate[0];
point[1] += data.translate[1];
})
)
);
return d;
})
color = d3.scaleSequential(d3.interpolateBuPu).domain([0, 3000])
d3 = require("d3@5", fix
? "d3-geo@1.12.1"
: "d3-geo@1.12.0")
land = fetch(
"https://unpkg.com/visionscarto-world-atlas@0.0.6/world/110m_land.geojson"
).then(d => d.json())
import { checkbox } from "@jashkenas/inputs"
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