97 lines
2.7 KiB
JavaScript
97 lines
2.7 KiB
JavaScript
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import fs from "node:fs/promises";
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import path from "node:path";
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const ROOT = process.cwd();
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const ZONES = [
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{ zoneId: "1", file: "특정어업수역Ⅰ.json", label: "Ⅰ", name: "수역I(동해)" },
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{ zoneId: "2", file: "특정어업수역Ⅱ.json", label: "Ⅱ", name: "수역II(제주남방)" },
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{ zoneId: "3", file: "특정어업수역Ⅲ.json", label: "Ⅲ", name: "수역III(서해남부)" },
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{ zoneId: "4", file: "특정어업수역Ⅳ.json", label: "Ⅳ", name: "수역IV(서해중간)" },
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];
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// Inverse Web Mercator (EPSG:3857) -> WGS84 lon/lat
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function mercatorToLonLat(x, y) {
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const R = 6378137;
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const lon = (x / R) * (180 / Math.PI);
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const lat = (2 * Math.atan(Math.exp(y / R)) - Math.PI / 2) * (180 / Math.PI);
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return [lon, lat];
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}
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function looksLikeLonLat(x, y) {
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return Math.abs(x) <= 180 && Math.abs(y) <= 90;
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}
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function convertPoint(pt) {
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if (!Array.isArray(pt) || pt.length < 2) return pt;
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const x = pt[0];
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const y = pt[1];
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if (typeof x !== "number" || typeof y !== "number") return pt;
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if (looksLikeLonLat(x, y)) return [x, y];
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return mercatorToLonLat(x, y);
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}
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function convertCoords(coords) {
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if (!Array.isArray(coords)) return coords;
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if (coords.length === 0) return coords;
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// Point: [x, y]
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if (typeof coords[0] === "number") return convertPoint(coords);
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// Nested arrays
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return coords.map(convertCoords);
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}
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async function main() {
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const rawDir = path.join(ROOT, "data", "raw", "zones");
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const outDir = path.join(ROOT, "apps", "web", "public", "data", "zones");
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await fs.mkdir(outDir, { recursive: true });
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const features = [];
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for (const z of ZONES) {
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const rawPath = path.join(rawDir, z.file);
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const txt = await fs.readFile(rawPath, "utf-8");
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const fc = JSON.parse(txt);
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if (!fc || fc.type !== "FeatureCollection" || !Array.isArray(fc.features)) {
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throw new Error(`Unexpected GeoJSON in ${rawPath}`);
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}
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for (const f of fc.features) {
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if (!f?.geometry?.coordinates) continue;
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const geometry = {
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...f.geometry,
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coordinates: convertCoords(f.geometry.coordinates),
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};
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features.push({
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...f,
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properties: {
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...(f.properties || {}),
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zoneId: z.zoneId,
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zoneLabel: z.label,
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zoneName: z.name,
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},
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geometry,
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});
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}
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}
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const out = {
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type: "FeatureCollection",
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name: "zones.wgs84",
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features,
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};
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const outPath = path.join(outDir, "zones.wgs84.geojson");
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await fs.writeFile(outPath, JSON.stringify(out), "utf-8");
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// eslint-disable-next-line no-console
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console.log(`Wrote ${features.length} features -> ${path.relative(ROOT, outPath)}`);
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}
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main().catch((err) => {
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// eslint-disable-next-line no-console
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console.error(err);
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process.exit(1);
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});
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