571 lines
20 KiB
TypeScript
571 lines
20 KiB
TypeScript
/**
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* Generates a collection of geojson files based on an overpass query for a given theme
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*/
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import { Utils } from "../src/Utils"
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import { Overpass } from "../src/Logic/Osm/Overpass"
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import { existsSync, readFileSync, writeFileSync } from "fs"
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import { TagsFilter } from "../src/Logic/Tags/TagsFilter"
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import { Or } from "../src/Logic/Tags/Or"
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import { AllKnownLayouts } from "../src/Customizations/AllKnownLayouts"
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import * as OsmToGeoJson from "osmtogeojson"
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import MetaTagging from "../src/Logic/MetaTagging"
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import { UIEventSource } from "../src/Logic/UIEventSource"
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import { TileRange, Tiles } from "../src/Models/TileRange"
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import LayoutConfig from "../src/Models/ThemeConfig/LayoutConfig"
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import ScriptUtils from "./ScriptUtils"
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import PerLayerFeatureSourceSplitter from "../src/Logic/FeatureSource/PerLayerFeatureSourceSplitter"
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import FilteredLayer from "../src/Models/FilteredLayer"
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import StaticFeatureSource from "../src/Logic/FeatureSource/Sources/StaticFeatureSource"
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import Constants from "../src/Models/Constants"
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import { GeoOperations } from "../src/Logic/GeoOperations"
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import SimpleMetaTaggers, { ReferencingWaysMetaTagger } from "../src/Logic/SimpleMetaTagger"
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import FilteringFeatureSource from "../src/Logic/FeatureSource/Sources/FilteringFeatureSource"
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import { Feature } from "geojson"
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import { BBox } from "../src/Logic/BBox"
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import { FeatureSource } from "../src/Logic/FeatureSource/FeatureSource"
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import OsmObjectDownloader from "../src/Logic/Osm/OsmObjectDownloader"
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import FeaturePropertiesStore from "../src/Logic/FeatureSource/Actors/FeaturePropertiesStore"
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ScriptUtils.fixUtils()
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function createOverpassObject(theme: LayoutConfig, backend: string) {
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let filters: TagsFilter[] = []
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let extraScripts: string[] = []
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for (const layer of theme.layers) {
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if (typeof layer === "string") {
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throw "A layer was not expanded!"
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}
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if (layer.doNotDownload) {
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continue
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}
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if (!layer.source) {
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continue
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}
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if (layer.source.geojsonSource) {
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// This layer defines a geoJson-source
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// SHould it be cached?
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if (layer.source.isOsmCacheLayer !== true) {
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continue
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}
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}
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filters.push(layer.source.osmTags)
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}
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filters = Utils.NoNull(filters)
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extraScripts = Utils.NoNull(extraScripts)
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if (filters.length + extraScripts.length === 0) {
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throw "Nothing to download! The theme doesn't declare anything to download"
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}
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return new Overpass(new Or(filters), extraScripts, backend, new UIEventSource<number>(60))
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}
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function rawJsonName(targetDir: string, x: number, y: number, z: number): string {
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return targetDir + "_" + z + "_" + x + "_" + y + ".json"
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}
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function geoJsonName(targetDir: string, x: number, y: number, z: number): string {
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return targetDir + "_" + z + "_" + x + "_" + y + ".geojson"
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}
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/// Downloads the given tilerange from overpass and saves them to disk
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async function downloadRaw(
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targetdir: string,
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r: TileRange,
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theme: LayoutConfig
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): Promise<{ failed: number; skipped: number }> {
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let downloaded = 0
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let failed = 0
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let skipped = 0
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const startTime = new Date().getTime()
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for (let x = r.xstart; x <= r.xend; x++) {
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for (let y = r.ystart; y <= r.yend; y++) {
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downloaded++
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const filename = rawJsonName(targetdir, x, y, r.zoomlevel)
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if (existsSync(filename)) {
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console.log("Already exists (not downloading again): ", filename)
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skipped++
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continue
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}
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const runningSeconds = (new Date().getTime() - startTime) / 1000
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const resting = failed + (r.total - downloaded)
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const perTile = runningSeconds / (downloaded - skipped)
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const estimated = Math.floor(resting * perTile)
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console.log(
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"total: ",
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downloaded,
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"/",
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r.total,
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"failed: ",
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failed,
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"skipped: ",
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skipped,
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"running time: ",
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Utils.toHumanTime(runningSeconds) + "s",
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"estimated left: ",
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Utils.toHumanTime(estimated),
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"(" + Math.floor(perTile) + "s/tile)"
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)
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const boundsArr = Tiles.tile_bounds(r.zoomlevel, x, y)
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const bounds = {
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north: Math.max(boundsArr[0][0], boundsArr[1][0]),
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south: Math.min(boundsArr[0][0], boundsArr[1][0]),
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east: Math.max(boundsArr[0][1], boundsArr[1][1]),
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west: Math.min(boundsArr[0][1], boundsArr[1][1]),
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}
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const overpass = createOverpassObject(
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theme,
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Constants.defaultOverpassUrls[failed % Constants.defaultOverpassUrls.length]
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)
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const url = overpass.buildQuery(
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"[bbox:" +
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bounds.south +
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"," +
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bounds.west +
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"," +
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bounds.north +
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"," +
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bounds.east +
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"]"
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)
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try {
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const json = await Utils.downloadJson(url)
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if ((<string>json.remark ?? "").startsWith("runtime error")) {
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console.error("Got a runtime error: ", json.remark)
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failed++
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} else if (json.elements.length === 0) {
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console.log("Got an empty response! Writing anyway")
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}
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console.log(
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"Got the response - writing ",
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json.elements.length,
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" elements to ",
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filename
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)
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writeFileSync(filename, JSON.stringify(json, null, " "))
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} catch (err) {
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console.log(url)
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console.log(
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"Could not download - probably hit the rate limit; waiting a bit. (" + err + ")"
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)
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failed++
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await ScriptUtils.sleep(1)
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}
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}
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}
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return { failed: failed, skipped: skipped }
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}
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/*
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* Downloads extra geojson sources and returns the features.
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* Extra geojson layers should not be tiled
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*/
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async function downloadExtraData(theme: LayoutConfig) /* : any[] */ {
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const allFeatures: any[] = []
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for (const layer of theme.layers) {
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if (!layer.source?.geojsonSource) {
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continue
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}
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const source = layer.source.geojsonSource
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if (layer.source.isOsmCacheLayer !== undefined && layer.source.isOsmCacheLayer !== false) {
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// Cached layers are not considered here
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continue
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}
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if (source.startsWith("https://api.openstreetmap.org/api/0.6/notes.json")) {
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// We ignore map notes
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continue
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}
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console.log("Downloading extra data: ", source)
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await Utils.downloadJson(source).then((json) => allFeatures.push(...json.features))
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}
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return allFeatures
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}
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function loadAllTiles(
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targetdir: string,
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r: TileRange,
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theme: LayoutConfig,
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extraFeatures: any[]
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): FeatureSource {
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let allFeatures = [...extraFeatures]
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let processed = 0
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for (let x = r.xstart; x <= r.xend; x++) {
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for (let y = r.ystart; y <= r.yend; y++) {
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processed++
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const filename = rawJsonName(targetdir, x, y, r.zoomlevel)
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console.log(" Loading and processing", processed, "/", r.total, filename)
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if (!existsSync(filename)) {
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console.error("Not found - and not downloaded. Run this script again!: " + filename)
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continue
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}
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// We read the raw OSM-file and convert it to a geojson
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const rawOsm = JSON.parse(readFileSync(filename, { encoding: "utf8" }))
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// Create and save the geojson file - which is the main chunk of the data
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const geojson = OsmToGeoJson.default(rawOsm)
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console.log(" which as", geojson.features.length, "features")
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allFeatures.push(...geojson.features)
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}
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}
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return StaticFeatureSource.fromGeojson(allFeatures)
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}
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/**
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* Load all the tiles into memory from disk
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*/
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async function sliceToTiles(
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allFeatures: FeatureSource,
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theme: LayoutConfig,
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targetdir: string,
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pointsOnlyLayers: string[],
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clip: boolean,
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targetzoomLevel: number = 9
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) {
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const skippedLayers = new Set<string>()
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const indexedFeatures: Map<string, any> = new Map<string, any>()
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let indexisBuilt = false
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const osmObjectDownloader = new OsmObjectDownloader()
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function buildIndex() {
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for (const f of allFeatures.features.data) {
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indexedFeatures.set(f.properties.id, f)
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}
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indexisBuilt = true
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}
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function getFeatureById(id) {
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if (!indexisBuilt) {
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buildIndex()
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}
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return indexedFeatures.get(id)
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}
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const flayers: FilteredLayer[] = theme.layers.map((l) => new FilteredLayer(l))
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const perLayer = new PerLayerFeatureSourceSplitter(flayers, allFeatures)
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for (const [layerId, source] of perLayer.perLayer) {
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const layer = flayers.find((flayer) => flayer.layerDef.id === layerId).layerDef
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const targetZoomLevel = layer.source.geojsonZoomLevel ?? targetzoomLevel
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if (layer.source.geojsonSource && layer.source.isOsmCacheLayer !== true) {
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console.log("Skipping layer ", layerId, ": not a caching layer")
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skippedLayers.add(layer.id)
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continue
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}
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const flayer: FilteredLayer = new FilteredLayer(layer)
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console.log(
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"Handling layer ",
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layerId,
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"which has",
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source.features.data.length,
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"features"
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)
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if (source.features.data.length === 0) {
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continue
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}
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const featureProperties: FeaturePropertiesStore = new FeaturePropertiesStore(source)
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MetaTagging.addMetatags(
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source.features.data,
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{
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getFeaturesWithin: (_) => {
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return <any>[allFeatures.features.data]
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},
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getFeatureById: getFeatureById,
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},
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layer,
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theme,
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osmObjectDownloader,
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featureProperties,
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{
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includeDates: false,
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includeNonDates: true,
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evaluateStrict: true,
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}
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)
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while (SimpleMetaTaggers.country.runningTasks.size > 0) {
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console.log(
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"Still waiting for ",
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SimpleMetaTaggers.country.runningTasks.size,
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" features which don't have a country yet"
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)
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await ScriptUtils.sleep(250)
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}
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const createdTiles = []
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// At this point, we have all the features of the entire area.
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// However, we want to export them per tile of a fixed size, so we use a dynamicTileSOurce to split it up
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const features = source.features.data
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const perBbox = GeoOperations.spreadIntoBboxes(features, targetZoomLevel)
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for (let [tileIndex, features] of perBbox) {
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const bbox = BBox.fromTileIndex(tileIndex).asGeoJson({})
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console.log("Got tile:", tileIndex, layer.id)
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if (features.length === 0) {
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continue
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}
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const filteredTile = new FilteringFeatureSource(
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flayer,
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new StaticFeatureSource(features)
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)
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console.log(
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"Tile " +
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layer.id +
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"." +
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tileIndex +
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" contains " +
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filteredTile.features.data.length +
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" features after filtering (" +
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features.length +
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") features before"
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)
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if (filteredTile.features.data.length === 0) {
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continue
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}
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let strictlyCalculated = 0
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let featureCount = 0
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for (const feature of features) {
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// Some cleanup
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if (layer.calculatedTags !== undefined) {
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// Evaluate all the calculated tags strictly
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const calculatedTagKeys = layer.calculatedTags.map((ct) => ct[0])
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featureCount++
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const props = feature.properties
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for (const calculatedTagKey of calculatedTagKeys) {
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const strict = props[calculatedTagKey]
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if (props.hasOwnProperty(calculatedTagKey)) {
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delete props[calculatedTagKey]
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}
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props[calculatedTagKey] = strict
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strictlyCalculated++
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if (strictlyCalculated % 100 === 0) {
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console.log(
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"Strictly calculated ",
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strictlyCalculated,
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"values for tile",
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tileIndex,
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": now at ",
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featureCount,
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"/",
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filteredTile.features.data.length,
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"examle value: ",
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strict
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)
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}
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}
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}
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delete feature["bbox"]
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}
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if (clip) {
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console.log("Clipping features")
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features = [].concat(
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...features.map((f: Feature) => GeoOperations.clipWith(<any>f, bbox))
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)
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}
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// Lets save this tile!
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const [z, x, y] = Tiles.tile_from_index(tileIndex)
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// console.log("Writing tile ", z, x, y, layerId)
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const targetPath = geoJsonName(targetdir + "_" + layerId, x, y, z)
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createdTiles.push(tileIndex)
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// This is the geojson file containing all features for this tile
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writeFileSync(
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targetPath,
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JSON.stringify(
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{
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type: "FeatureCollection",
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features,
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},
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null,
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" "
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)
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)
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console.log("Written tile", targetPath, "with", filteredTile.features.data.length)
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}
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// All the tiles are written at this point
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// Only thing left to do is to create the index
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const path = targetdir + "_" + layerId + "_" + targetZoomLevel + "_overview.json"
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const perX = {}
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createdTiles
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.map((i) => Tiles.tile_from_index(i))
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.forEach(([z, x, y]) => {
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const key = "" + x
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if (perX[key] === undefined) {
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perX[key] = []
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}
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perX[key].push(y)
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})
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console.log("Written overview: ", path, "with ", createdTiles.length, "tiles")
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writeFileSync(path, JSON.stringify(perX))
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// And, if needed, to create a points-only layer
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if (pointsOnlyLayers.indexOf(layer.id) >= 0) {
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const filtered = new FilteringFeatureSource(flayer, source)
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const features = filtered.features.data
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const points = features.map((feature) => GeoOperations.centerpoint(feature))
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console.log("Writing points overview for ", layerId)
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const targetPath = targetdir + "_" + layerId + "_points.geojson"
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// This is the geojson file containing all features for this tile
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writeFileSync(
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targetPath,
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JSON.stringify(
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{
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type: "FeatureCollection",
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features: points,
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},
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null,
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" "
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)
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)
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}
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}
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const skipped = Array.from(skippedLayers)
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if (skipped.length > 0) {
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console.warn(
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"Did not save any cache files for layers " +
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skipped.join(", ") +
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" as these didn't set the flag `isOsmCache` to true"
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)
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}
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}
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export async function main(args: string[]) {
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console.log("Cache builder started with args ", args.join(" "))
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ReferencingWaysMetaTagger.enabled = false
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if (args.length < 6) {
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console.error(
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"Expected arguments are: theme zoomlevel targetdirectory lat0 lon0 lat1 lon1 [--generate-point-overview layer-name,layer-name,...] [--force-zoom-level z] [--clip]" +
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"--force-zoom-level causes non-cached-layers to be donwnloaded\n" +
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"--clip will erase parts of the feature falling outside of the bounding box"
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)
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return
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}
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const themeName = args[0]
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const zoomlevel = Number(args[1])
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console.log(
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"Target zoomlevel for the tiles is",
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zoomlevel,
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"; this can be overridden by the individual layers"
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)
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const targetdir = args[2] + "/" + themeName
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if (!existsSync(args[2])) {
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console.log("Directory not found")
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throw `The directory ${args[2]} does not exist`
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}
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const lat0 = Number(args[3])
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const lon0 = Number(args[4])
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const lat1 = Number(args[5])
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const lon1 = Number(args[6])
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const clip = args.indexOf("--clip") >= 0
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if (isNaN(lat0)) {
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throw "The first number (a latitude) is not a valid number"
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}
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if (isNaN(lon0)) {
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throw "The second number (a longitude) is not a valid number"
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}
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if (isNaN(lat1)) {
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throw "The third number (a latitude) is not a valid number"
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}
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if (isNaN(lon1)) {
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throw "The fourth number (a longitude) is not a valid number"
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}
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const tileRange = Tiles.TileRangeBetween(zoomlevel, lat0, lon0, lat1, lon1)
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if (isNaN(tileRange.total)) {
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throw "Something has gone wrong: tilerange is NAN"
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}
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if (tileRange.total === 0) {
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console.log("Tilerange has zero tiles - this is probably an error")
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return
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}
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const theme = AllKnownLayouts.allKnownLayouts.get(themeName)
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if (theme === undefined) {
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const keys = Array.from(AllKnownLayouts.allKnownLayouts.keys())
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console.error("The theme " + themeName + " was not found; try one of ", keys)
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return
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}
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theme.layers = theme.layers.filter(
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(l) =>
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Constants.priviliged_layers.indexOf(<any>l.id) < 0 && !l.id.startsWith("note_import_")
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)
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console.log("Layers to download:", theme.layers.map((l) => l.id).join(", "))
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let generatePointLayersFor = []
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if (args[7] == "--generate-point-overview") {
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if (args[8] === undefined) {
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throw "--generate-point-overview needs a list of layers to generate the overview for (or * for all)"
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} else if (args[8] === "*") {
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generatePointLayersFor = theme.layers.map((l) => l.id)
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} else {
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generatePointLayersFor = args[8].split(",")
|
|
}
|
|
console.log(
|
|
"Also generating a point overview for layers ",
|
|
generatePointLayersFor.join(",")
|
|
)
|
|
}
|
|
{
|
|
const index = args.indexOf("--force-zoom-level")
|
|
if (index >= 0) {
|
|
const forcedZoomLevel = Number(args[index + 1])
|
|
for (const layer of theme.layers) {
|
|
layer.source.geojsonSource = "https://127.0.0.1/cache_{layer}_{z}_{x}_{y}.geojson"
|
|
layer.source.isOsmCacheLayer = true
|
|
layer.source.geojsonZoomLevel = forcedZoomLevel
|
|
}
|
|
}
|
|
}
|
|
|
|
let failed = 0
|
|
do {
|
|
try {
|
|
const cachingResult = await downloadRaw(targetdir, tileRange, theme)
|
|
failed = cachingResult.failed
|
|
if (failed > 0) {
|
|
await ScriptUtils.sleep(30000)
|
|
}
|
|
} catch (e) {
|
|
console.error(e)
|
|
return
|
|
}
|
|
} while (failed > 0)
|
|
|
|
const extraFeatures = await downloadExtraData(theme)
|
|
const allFeaturesSource = loadAllTiles(targetdir, tileRange, theme, extraFeatures)
|
|
await sliceToTiles(allFeaturesSource, theme, targetdir, generatePointLayersFor, clip, zoomlevel)
|
|
}
|
|
|
|
let args = [...process.argv]
|
|
if (!args[1]?.endsWith("test/TestAll.ts")) {
|
|
args.splice(0, 2)
|
|
try {
|
|
main(args)
|
|
.then(() => console.log("All done!"))
|
|
.catch((e) => console.error("Error building cache:", e))
|
|
} catch (e) {
|
|
console.error("Error building cache:", e)
|
|
}
|
|
}
|