237 lines
No EOL
8.4 KiB
TypeScript
237 lines
No EOL
8.4 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 {TileRange, Utils} from "../Utils";
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Utils.runningFromConsole = true
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import {Overpass} from "../Logic/Osm/Overpass";
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import {existsSync, readFileSync, writeFileSync} from "fs";
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import {TagsFilter} from "../Logic/Tags/TagsFilter";
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import {Or} from "../Logic/Tags/Or";
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import LayoutConfig from "../Customizations/JSON/LayoutConfig";
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import {AllKnownLayouts} from "../Customizations/AllKnownLayouts";
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import ScriptUtils from "./ScriptUtils";
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import ExtractRelations from "../Logic/Osm/ExtractRelations";
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import * as OsmToGeoJson from "osmtogeojson";
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import MetaTagging from "../Logic/MetaTagging";
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function createOverpassObject(theme: LayoutConfig) {
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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.geojsonSource !== undefined) {
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// We download these anyway - we are building the cache after all!
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//continue;
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}
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// Check if data for this layer has already been loaded
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if (layer.source.overpassScript !== undefined) {
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extraScripts.push(layer.source.overpassScript)
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} else {
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filters.push(layer.source.osmTags);
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}
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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);
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}
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function saveResponse(chunks: string[], targetDir: string): boolean {
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const contents = chunks.join("")
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if (contents.startsWith("<?xml")) {
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// THis is an error message
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console.error("Failed to create ", targetDir, "probably over quota: ", contents)
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return false;
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}
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writeFileSync(targetDir, contents)
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return true
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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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async function downloadRaw(targetdir: string, r: TileRange, overpass: Overpass)/* : {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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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: ", filename)
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skipped++
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continue;
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}
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console.log("x:", (x - r.xstart), "/", (r.xend - r.xstart), "; y:", (y - r.ystart), "/", (r.yend - r.ystart), "; total: ", downloaded, "/", r.total, "failed: ", failed, "skipped: ", skipped)
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const boundsArr = Utils.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 url = overpass.buildQuery("[bbox:" + bounds.south + "," + bounds.west + "," + bounds.north + "," + bounds.east + "]")
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let gotResponse = false
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let success = false;
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ScriptUtils.DownloadJSON(url,
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chunks => {
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gotResponse = true;
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success = saveResponse(chunks, filename)
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})
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while (!gotResponse) {
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await ScriptUtils.sleep(10000)
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console.debug("Waking up")
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if (!gotResponse) {
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console.log("Didn't get an answer yet - waiting more")
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}
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}
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if (!success) {
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failed++;
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console.log("Hit the rate limit - waiting 90s")
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for (let i = 0; i < 90; i++) {
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console.log(90 - i)
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await ScriptUtils.sleep(1000)
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}
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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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async function postProcess(targetdir: string, r: TileRange, theme: LayoutConfig) {
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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(" Post processing", processed, "/", r.total, filename)
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if (!existsSync(filename)) {
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throw "Not found - and not downloaded. Run this script again!: " + filename
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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, "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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const osmTime = new Date(rawOsm.osm3s.timestamp_osm_base);
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for (const feature of geojson.features) {
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for (const layer of theme.layers) {
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if (layer.source.osmTags.matchesProperties(feature.properties)) {
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feature["_matching_layer_id"] = layer.id;
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break;
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}
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}
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}
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const featuresFreshness = geojson.features.map(feature => {
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feature["_timestamp"] = rawOsm.osm3s.timestamp_osm_base;
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return ({
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freshness: osmTime,
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feature: feature
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});
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});
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// Extract the relationship information
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const relations = ExtractRelations.BuildMembershipTable(ExtractRelations.GetRelationElements(rawOsm))
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MetaTagging.addMetatags(featuresFreshness, relations, theme.layers);
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writeFileSync(geoJsonName(targetdir, x, y, r.zoomlevel), JSON.stringify(geojson, null, " "))
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}
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}
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}
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async function splitPerLayer(targetdir: string, r: TileRange, theme: LayoutConfig) {
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let processed = 0;
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const z = r.zoomlevel;
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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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const file = readFileSync(geoJsonName(targetdir, x, y, z), "UTF8")
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for (const layer of theme.layers) {
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const geojson = JSON.parse(file)
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geojson.features = geojson.features.filter(f => f._matching_layer_id === layer.id)
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if(geojson.features.length == 0){
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continue;
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}
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const new_path = geoJsonName(targetdir+"_"+layer.id, x, y, z);
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writeFileSync(new_path, JSON.stringify(geojson, null, " "))
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}
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}
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}
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}
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async function main(args: string[]) {
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if (args.length == 0) {
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console.error("Expected arguments are: theme zoomlevel targetdirectory lat0 lon0 lat1 lon1")
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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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const targetdir = args[2] + "/" + themeName
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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 tileRange = Utils.TileRangeBetween(zoomlevel, lat0, lon0, lat1, lon1)
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const theme = AllKnownLayouts.allKnownLayouts.get(themeName)
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if (theme === undefined) {
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const keys = []
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AllKnownLayouts.allKnownLayouts.forEach((_, key) => {
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keys.push(key)
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})
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console.error("The theme " + theme + " was not found; try one of ", keys);
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return
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}
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const overpass = createOverpassObject(theme)
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let failed = 0;
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do {
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const cachingResult = await downloadRaw(targetdir, tileRange, overpass)
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failed = cachingResult.failed
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if (failed > 0) {
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ScriptUtils.sleep(30000)
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}
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} while (failed > 0)
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await postProcess(targetdir, tileRange, theme)
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await splitPerLayer(targetdir, tileRange, theme)
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}
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let args = [...process.argv]
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args.splice(0, 2)
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main(args); |