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Published
Edited
Mar 5, 2021
Importers
1 star
viewof apiKey = html`<input type=text>`
apiKey
stateCombined.clientWidth
width
countyCombined = html`
<div style="width: min-content; padding: 5px;">
<div style="border: 1px solid #333; border-radius: 8px; padding: 5px;"> <div style="text-align: center; width: 620px; font-weight: 700; font-size: 2rem;">${
stateCounties.find(d => d.county === county).NAME
} - ${d3.format('.3s')(
stateCounties.find(d => d.county === county).B01001_001E
)}</div>
<div style="display: grid; grid-template-columns: 300px 300px; grid-gap: 20px;">
<div>${countyMapX.cloneNode(true)}</div>
<div>${countyMapY.cloneNode(true)}</div>`
s = states.features.find(d => d.properties.STATEFP === state)
stateYMargin = ({
top: 10,
right: 70,
bottom: 10,
left: 10
})
projectionY = d3
.geoMercator()
.fitExtent(
[
[stateYMargin.left, stateYMargin.top],
[300 - stateYMargin.right, 300 - stateYMargin.bottom]
],
s
)
pathY = d3.geoPath(projectionY)
stateXMargin = ({
top: 35,
right: 10,
bottom: 10,
left: 10
})
countyYMargin = ({
top: 10,
right: 70,
bottom: 10,
left: 10
})
countyXMargin = ({
top: 35,
right: 10,
bottom: 10,
left: 10
})
countyProjectionX = d3
.geoMercator()
.fitExtent(
[
[countyXMargin.left, countyXMargin.top],
[300 - countyXMargin.right, 300 - countyXMargin.bottom]
],
c
)
countyPathX = d3.geoPath(countyProjectionX)
countyProjection = d3
.geoMercator()
.fitExtent([[10, 10], [300 - 10, 300 - 10]], c)
countyPath = d3.geoPath(countyProjection)
d3 = require('d3@6', "d3-geo-scale-bar@1.1.1")
census = {
const census = await require(await FileAttachment('citysdk-2.0.37.js').url());
return (...params) =>
new Promise((resolve, reject) => {
census(...params, (err, data) => {
if (err) return reject(err);
return resolve(data);
});
});
}
import { Select, Radio } from "@observablehq/inputs"
states = census({
vintage: "2017",
values: ["NAME", "B01001_001E"],
sourcePath: ["acs", "acs5"],
geoHierarchy: {
state: "*"
},
geoResolution: "20m",
statsKey: apiKey
})
stateCounties = census({
vintage: "2017",
values: ["NAME", "B01001_001E"],
sourcePath: ["acs", "acs5"],
geoHierarchy: {
state: state,
county: "*"
},
statsKey: apiKey,
})
stateTracts = census({
vintage: "2017",
values: ["B01001_001E"],
sourcePath: ["acs", "acs5"],
geoHierarchy: {
state: state,
tract: "*"
},
statsKey: apiKey,
geoResolution: "500k" // required
})
topojson = require('topojson-server', 'topojson-client')
c = topojson.merge(cbg, cbg.objects.blockgroups.geometries)
cbg = topojson.topology({ blockgroups: countyBlockGroups })
countyBlockGroups = census({
vintage: "2017",
values: ["B01001_001E"],
sourcePath: ["acs", "acs5"],
geoHierarchy: {
state: state,
county: county,
"block-group": "*"
},
statsKey: apiKey,
geoResolution: "500k" // required
})
sortedX = stateTracts.features
.slice()
.sort((a, b) => d3.descending(d3.geoCentroid(a)[0], d3.geoCentroid(b)[0]))
sortedY = stateTracts.features
.slice()
.sort((a, b) => d3.descending(d3.geoCentroid(a)[1], d3.geoCentroid(b)[1]))
stateTotal = d3.sum(stateTracts.features, d => d.properties.B01001_001E)
middleXi = {
let accum = 0;
for (const [i, tract] of sortedX.entries()) {
accum += tract.properties.B01001_001E;
if (accum >= stateTotal / 2) return i;
}
}
middleX = d3.geoCentroid(sortedX[middleXi])
middleYi = {
let accum = 0;
for (const [i, tract] of sortedY.entries()) {
accum += tract.properties.B01001_001E;
if (accum >= stateTotal / 2) return i;
}
}
middleY = d3.geoCentroid(sortedY[middleYi])
countySortedX = countyBlockGroups.features
.slice()
.sort((a, b) => d3.descending(d3.geoCentroid(a)[0], d3.geoCentroid(b)[0]))
countySortedY = countyBlockGroups.features
.slice()
.sort((a, b) => d3.descending(d3.geoCentroid(a)[1], d3.geoCentroid(b)[1]))
countyTotal = d3.sum(countyBlockGroups.features, d => d.properties.B01001_001E)
countyMiddleXi = {
let accum = 0;
for (const [i, tract] of countySortedX.entries()) {
accum += tract.properties.B01001_001E;
if (accum >= countyTotal / 2) return i;
}
}
countyMiddleX = d3.geoCentroid(countySortedX[countyMiddleXi])
countyMiddleYi = {
let accum = 0;
for (const [i, tract] of countySortedY.entries()) {
accum += tract.properties.B01001_001E;
if (accum >= countyTotal / 2) return i;
}
}
countyMiddleY = d3.geoCentroid(countySortedY[countyMiddleYi])
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