forked from MapComplete/MapComplete
45 lines
1.2 KiB
TypeScript
45 lines
1.2 KiB
TypeScript
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import * as fs from "fs";
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function main(args){
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if(args.length < 2){
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console.log("Given a single geojson file, generates the partitions for every found property")
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console.log("USAGE: perProperty `file.geojson` `property-key`")
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return
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}
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const path = args[0]
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const key = args[1]
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const data= JSON.parse(fs.readFileSync(path, "UTF8"))
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const perProperty = new Map<string, any[]>()
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console.log("Partitioning",data.features.length, "features")
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for (const feature of data.features) {
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const v = feature.properties[key]
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if(!perProperty.has(v)){
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console.log("Found a new category:", v)
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perProperty.set(v, [])
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}
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perProperty.get(v).push(feature)
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}
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const stripped = path.substr(0, path.length - ".geojson".length)
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perProperty.forEach((features, v) => {
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fs.writeFileSync(stripped+"."+v.replace(/[^a-zA-Z0-9_]/g, "_")+".geojson",
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JSON.stringify({
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type:"FeatureCollection",
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features
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}))
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})
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}
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let args = [...process.argv]
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args.splice(0, 2)
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try {
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main(args)
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} catch (e) {
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console.error("Error building cache:", e)
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}
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console.log("All done!")
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