The avatar for @shastabolicious
Casey Labrack
Published
Edited
Sep 27, 2019
1 fork
Importers
2 stars
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mapAsGeoObject = {

let geo = {}
geo.type = "Feature"
geo.geometry = {}
geo.geometry.type = "Polygon"
geo.geometry.coordinates =
[
[
projection.invert([0,0]),
projection.invert([0, height]),
projection.invert([width,height]),
projection.invert([width,0])
].reverse() // winding order
]
return geo
}
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earthRadius = 6371
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area = d3.geoArea(mapAsGeoObject) * Math.pow(earthRadius,2)
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pixelsArea = width * height
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pixelsPerSqKM = pixelsArea / area
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thresholds = densityContours.map(z => z.value)
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perKM = thresholds.map(z => z * pixelsPerSqKM)
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