Visualizing a changing planet for The Washington Post
Public
Edited
Aug 22, 2024
legend = () => {
const ticksize = 4;
const margin = {left: 0, right: 0, top: 18, bottom: ticksize + 30};
const width = 320 - margin.left - margin.right;
const height = 12;
const textpad = 12;
const x = d3.scaleBand().domain(d3.range(5)).range([0, width / 2]);
const epsilon = 1;
const wrapper = d3.create("div")
.style("width", `${width + margin.left + margin.right}px`)
.style("margin", "0 auto")
.style("margin-bottom", "-40px")
const titles = wrapper.append("div")
.style("font-family", franklinLight)
.style("margin-bottom", "12px")
.style("text-align", "center");
titles.append("div")
.style("font-size", "18px")
.style("font-weight", "bold")
.text("Change in length of mosquito season");
titles.append("div")
.text("1980-2009 vs. 2019-2023");
const svg = wrapper.append("svg")
.attr("font-family", franklinLight)
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom);
const g = svg.append("g")
.attr("transform", `translate(${[margin.left, margin.top]})`)
g.selectAll(".label")
.data(["← Shorter", "Longer →"])
.join("text")
.attr("font-size", 16)
.attr("x", (d, i) => width / 2 + (16 * (i === 0 ? -1 : 1)))
.attr("y", -6)
.attr("text-anchor", (d, i) => i === 0 ? "end" : "start")
.text(d => d);
const decrease = g.append("g");
const decreaseData = x.domain()
.map((x, i, e) => {
const weeks = e.length - x - 1;
return {
x,
color: color(1 - 7 + 7 * x - 28),
html: i === 0 ? `<tspan>${e.length - 1}</tspan><tspan x=0 dy=12>weeks</tspan>` : weeks === 0 ? "" : `${weeks}`
}});
const rect = [[0, 0], [x.bandwidth(), 0], [x.bandwidth(), height], [0, height]];
const decreaseRect = decrease.selectAll("polygon")
.data(decreaseData)
.join("polygon")
.attr("transform", d => `translate(${x(d.x)})`)
.attr("points", (d, i, e) => {
if (i === 0) {
return [
[0, height / 2],
[x.bandwidth() / 2, 0],
[x.bandwidth(), 0],
[x.bandwidth(), height],
[x.bandwidth() / 2, height],
[0, height / 2]
]
}
else {
return rect;
}
})
.attr("fill", d => d.color);
const decreaseTick = decrease.selectAll(".tick")
.data(decreaseData)
.join("g")
.attr("class", "tick")
.attr("transform", d => `translate(${x(d.x) + x.bandwidth()})`);
decreaseTick.append("line")
.attr("y2", (d, i, e) => height + ticksize * (i === e.length - 1 ? 0 : 1))
.attr("stroke", "black")
decreaseTick.append("text").filter(d => d)
.attr("font-size", 14)
.attr("text-anchor", "middle")
.attr("y", height + ticksize + textpad)
.html(d => d.html);
const increase = g.append("g")
.attr("transform", `translate(${width / 2})`);
const increaseData = x.domain()
.map((x, i, e) => {
const weeks = x;
return {
x,
color: color(epsilon + 7 * x),
html: weeks === 0 ? "" : `<tspan>${weeks}</tspan><tspan x=0 dy=12>${i === e.length - 1 ? " weeks</tspan>" : ""}`
}});
const increaseRect = increase.selectAll("polygon")
.data(increaseData)
.join("polygon")
.attr("transform", d => `translate(${x(d.x)})`)
.attr("points", (d, i, e) => {
if (i === e.length - 1) {
return [
[0, 0],
[x.bandwidth() / 2, 0],
[x.bandwidth(), height / 2],
[x.bandwidth() / 2, height],
[0, height],
[0, 0]
]
}
else {
return rect;
}
})
.attr("fill", d => d.color);
const increaseTick = increase.selectAll(".tick")
.data(increaseData)
.join("g")
.attr("class", "tick")
.attr("transform", d => `translate(${x(d.x)})`);
increaseTick.append("line")
.attr("y2", (d, i) => height + ticksize * Math.min(i, 1))
.attr("stroke", "black")
increaseTick.append("text").filter(d => d)
.attr("font-size", 14)
.attr("text-anchor", "middle")
.attr("y", height + ticksize + textpad)
.html(d => d.html);
return wrapper.node();
}
map = function*() {
const wrapper = d3.create("div")
.style("width", `${w}px`)
.style("height", `${h}px`)
.style("position", "relative");
wrapper.append("style").html(css);
const canvas = wrapper.append("canvas")
.style("position", "absolute");
canvas.node().width = w;
canvas.node().height = h;
const context = canvas.node().getContext("2d");
path.context(context);
for (let i = 0, l = V.length; i < l; i++) {
const v = V[i];
if (!v) continue;
const lon = X[i % X.length];
const lat = Y[i / X.length | 0];
const w = Math.max(-180, lon - cell_res / 2);
const e = Math.min(180, lon + cell_res / 2);
const n = Math.min(90, lat + cell_res / 2);
const s = Math.max(-90, lat - cell_res / 2);
context.beginPath();
path({
type: "Feature",
geometry: {
type: "Polygon",
// wn, en, es, ws, wn
coordinates: [
[[w, n], [e, n], [e, s], [w, s], [w, n]]
]
}
});
const c = color(v);
context.fillStyle = c;
context.fill();
context.strokeStyle = c;
context.stroke();
if (i % 1e4 === 0) yield wrapper.node();
}
context.fillStyle = "none";
context.lineWidth = 1;
context.beginPath();
path(usGeoInner);
context.strokeStyle = "#494949";
context.stroke();
context.beginPath();
path(usGeoOuter);
context.strokeStyle = "#2a2a2a";
context.stroke();
const svg = wrapper.append("svg")
.style("position", "absolute")
.attr("width", w)
.attr("height", h);
const citiesG = svg.selectAll(".city")
.data(cities)
.join("g")
.attr("class", d => `city ${d.pos} ${toSlugCase(d.name)}`)
.attr("transform", d => `translate(${projection([d.lon, d.lat])})`);
citiesG.append("circle")
.attr("class", "bg bg-0")
.attr("r", 3);
citiesG.append("circle")
.attr("class", "bg bg-1")
.attr("r", 3);
citiesG.append("circle")
.attr("class", "fg")
.attr("r", 3);
citiesG.append("text")
.attr("class", "bg bg-0")
.text(d => d.name);
citiesG.append("text")
.attr("class", "bg bg-1")
.text(d => d.name);
citiesG.append("text")
.attr("class", "fg")
.text(d => d.name);
yield wrapper.node();
}
css = `
.city circle.bg {
fill: none;
stroke: white;
}
.city circle.bg-0 {
stroke-width: 6px;
stroke-opacity: 0.2;
}
.city circle.bg-1 {
stroke-width: 3px;
stroke-opacity: 0.5;
}
.city circle.fg {
fill: none;
stroke: black;
}
.city.ne text {
transform: translate(4px, -4px);
}
.city.se text {
transform: translate(4px, 13px);
}
.city.e text {
transform: translate(6px, 4.5px);
}
.city.boston {
display: ${w <= 480 ? "none" : "block"};
}
.city.boston text {
text-anchor: ${w <= 900 ? "end" : "start"};
transform: translate(${w <= 900 ? "-4px" : "4px"}, -4px);
}
.city.chicago text {
text-anchor: ${w <= 620 ? "end" : "start"};
transform: translate(${w <= 620 ? "-4px" : "4px"}, -4px);
}
.city.minneapolis {
display: ${w <= 480 ? "none" : "block"};
}
.city.new-york text {
text-anchor: ${w <= 660 ? "end" : "start"};
transform: translate(${w <= 600 ? "-4px" : "4px"}, -4px);
}
.city.philadelphia {
display: ${w <= 480 ? "none" : "block"};
}
.city.philadelphia text {
text-anchor: ${w <= 768 ? "end" : "start"};
transform: translate(${w <= 768 ? "-6px" : "6px"}, 4.5px);
}
.city.seattle text {
transform: translate(4px, ${w <= 400 ? "13px" : "-4px"});
}
.city.st-louis {
display: ${w <= 480 ? "none" : "block"};
}
.city.washington-dc text {
text-anchor: ${w <= 400 ? "end" : w <= 768 ? "middle" : "start"};
transform: ${w <= 400 ? "translate(-4px, 13px)" : w <= 768 ? "translate(0px, 16px)" : "translate(4px, 13px)"};
}
.city text {
font-size: ${w <= 480 ? "13px" : "14px"};
font-family: ${franklinLight};
fill: black;
}
.city text.bg {
fill: white;
stroke: white;
}
.city text.bg-0 {
stroke-width: 4px;
stroke-opacity: 0.2;
}
.city text.bg-1 {
stroke-width: 2px;
stroke-opacity: 0.5;
}
`
colors = ['#7f3b08','#b35806','#e08214','#fdb863','#fee0b6','#ffffff','#d8daeb','#b2abd2','#8073ac','#542788','#2d004b']
positive = colors.slice(0, colors.length / 2).reverse()
negative = colors.slice(Math.ceil(colors.length / 2))
color = value => {
const round = Math.round(value);
if (round > 0) {
if (round < 7) return positive[0];
if (round < 14) return positive[1];
if (round < 21) return positive[2];
if (round < 28) return positive[3];
return positive[4];
}
if (round < 0) {
if (round > -7) return negative[0];
if (round > -14) return negative[1];
if (round > -21) return negative[2];
if (round > -28) return negative[3];
return negative[4];
}
}
projection = d3.geoAlbers()
.fitSize([w, h], usGeoOuter)
path = d3.geoPath(projection)
usTopo = FileAttachment("statesTopo.json").json()
usGeoInner = topojson.mesh(usTopo, usTopo.objects.ne_50m_admin_1_states_provinces_lakes, (a, b) => a !== b)
usGeoOuter = topojson.mesh(usTopo, usTopo.objects.ne_50m_admin_1_states_provinces_lakes, (a, b) => a === b)
cities = FileAttachment("cities.json").json()
file = FileAttachment("mosquito_days_anomaly_v3.nc")
nc = file
.arrayBuffer()
.then((buffer) => new netcdf(buffer))
V = nc.getDataVariable("count_anomaly")
X = nc.getDataVariable("lon")
Y = nc.getDataVariable("lat")
cell_res = 1 / 24
w = width
h = w * 0.631
function toSlugCase(x) {
return x.toString().toLowerCase()
.replace(/\s+/g, "-") // Replace spaces with -
.replace(/[^\w\-]+/g, "") // Remove all non-word chars
.replace(/\-\-+/g, "-") // Replace multiple - with single -
.replace(/^-+/, "") // Trim - from start of text
.replace(/-+$/, ""); // Trim - from end of text
}
import { franklinLight } from "@climatelab/fonts@46"
import { toc } from "@climatelab/toc@45"
netcdf = import("https://cdn.skypack.dev/netcdfjs@2.0.2?min").then(d => d.NetCDFReader)
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