Published
Edited
Jun 18, 2021
viewof myMap = deckMap({
geography: usaData.geojsonData,
data: data,
height: height,
width: width,
initialViewState: initialViewState,
geographyIdVariable:'dept',
dataIdVariable:'dept',
colorVariable:'Litercy',
breaks: breaks,
colorBins: colorBins,
// ordinalLabels: ['Lowest', 'Lower', 'Medium', 'Higher','Highest'],
controller: false,
title: "France Literacy ca. 1830",
})
a = [1,2,3]
b = [2,3,4]
[...a,...b]
height = 300
width = 500
usaData = loadGeojson(geoda, 'https://nofurtherinformation.static.observableusercontent.com/files/602dde7c42338e81f502e2dc7d76e911439faf63cc6e6b83a67a4d82e46c154a1f729feeabe2e981b92e1286af2e7036e51f22aed9d1bf7bf3c8cc17dd4e19f9?response-content-disposition=attachment%3Bfilename*%3DUTF-8%27%27guerry_wgs84.geojson&Expires=1624017600000&Key-Pair-Id=APKAJCHFJLLLU4Y2WVSQ&Signature=kHeohtthYoQwhlvD7u~uUyfKPhB9hA-yVs3rFFRT2W5G7D7Eq6imc2EfpCZDNQDEbvLzLDG84Ukw~SfkikNGe8UzBt9lFZk4odfdhDbORZvtMeQPPTyoOZ6Hf8uFaGylnMd2-f7hEWEYax-q4I2011PHFogqioCQxpiCM8aPABUph-5jJ7KzMWlqlfv-eM37sof6F8saN3sL2I~N~~6b3jilcp6tXKQXFj4aGE4ECjD8MvCz67EmQlx435V8aVmhTGhwl6SG438rZ6idl0kVDaMlhw17L5IvBVDcpiHgltffvg9HipkHv2a854e4f2Qdnz5c6nQ3e3XaHqPTGE1cjg__')
k = 5
colorBins = d3.schemeGreens[5]
breaks = geoda.naturalBreaks(k, geoda.getColumn(usaData.id, 'Litercy'));
data = usaData.geojsonData.features.map(f => f.properties)
initialViewState = getViewPort(geoda, usaData.id, height, width)
function deckMap({
initialViewState={
latitude:0,
longitude:0,
zoom:0
},
geography={},
data={},
colorBins=[],
breaks=[],
ordinalLabels=[],
controller=true,
geographyIdVariable='',
dataIdVariable='',
colorVariable='',
width=500,
height=500,
customDeckParams={},
title='',
strokeColor="#999999"
}){
const container = html `<div style="height:${height}px;width:${width}px"></div>`
const dataById = d3.map(data, d => d[dataIdVariable]);
const deckgl = new deck.DeckGL({
container: container,
map: false,
// Viewport settings
initialViewState,
controller,
glOptions: {
preserveDrawingBuffer: true // https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/getContext
},
});
const colorScale = d3.scaleThreshold(breaks, colorBins)
const layer = new deck.GeoJsonLayer({
id: `geojson`,
data: geography,
getFillColor: f => {
if (dataById.has(f.properties[geographyIdVariable])) {
const datum = dataById.get(f.properties[geographyIdVariable]);
return hexToRgb(colorScale(datum[colorVariable]));
} else {
return [240,240,240]
}
},
getLineColor: hexToRgb(strokeColor),
lineWidthScale: 1,
lineWidthMinPixels: 1,
getLineWidth: 1,
...customDeckParams
});
deckgl.setProps({layers: [layer]});
const mapLegend = ordinalLabels.length
? swatches({color: d3.scaleOrdinal(ordinalLabels, colorBins), columns: 1})
: legend({color: colorScale, width: width/3})
return html`<div style="height:${height}px;width:${width}px">
<span id="meta" style="z-index:5">
<h2>${title}</h2>
${mapLegend}
</span>
${container}
</div>`
}
// thanks! https://stackoverflow.com/questions/5623838/rgb-to-hex-and-hex-to-rgb
function hexToRgb(hex) {
var result = /^#?([a-f\d]{2})([a-f\d]{2})([a-f\d]{2})$/i.exec(hex);
return result ? [
parseInt(result[1], 16),
parseInt(result[2], 16),
parseInt(result[3], 16)
] : null;
}
async function loadGeojson(geoda, url){
if (!geoda.version) return;
const response = await fetch(url)
const clone = response.clone()
const [geojsonData, ab] = await Promise.all([response.json(), clone.arrayBuffer()])
const id = geoda.readGeoJSON(ab)
return {geojsonData, id}
}
function getViewPort(geoda, id, height, width){
const bounds = geoda.getBounds(id)
return mathgl.fitBounds({
height: height,
width: width,
bounds: [[bounds[0],bounds[2]],[bounds[1],bounds[3]]]
})
}
geoda = await jsgeoda.New()
jsgeoda = import('https://cdn.skypack.dev/jsgeoda')
deck = require.alias({
h3: {},
s2Geometry: {}
})('deck.gl@^8.0.0/dist.min.js')
d3 = require("https://d3js.org/d3.v5.min.js")
mathgl = import('https://cdn.skypack.dev/@math.gl/web-mercator')
import {legend, swatches} from "@d3/color-legend"
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