AI Assistant
ba579d75c1
- Magic GPKG (terenuri_magic.gpkg) now contains ALL records: rows with geometry render as polygons, rows without have null geom but still carry all attribute/enrichment data (QGIS shows them fine) - Added HAS_GEOMETRY column to Magic GPKG fields (0 or 1) - GPKG builder now supports includeNullGeometry option: splits features into spatial-first (creates table), then appends null-geom rows - Base terenuri.gpkg / cladiri.gpkg unchanged (spatial only) - CSV still has all records as before - GeoJsonFeature type now allows null geometry - Reproject: null geometry guard added - UI text updated: no longer says 'Nu apar in GPKG'
83 lines
2.2 KiB
TypeScript
83 lines
2.2 KiB
TypeScript
/**
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* ESRI → GeoJSON conversion for eTerra features.
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*/
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import type { EsriFeature } from "./eterra-client";
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export type GeoJsonPolygon = { type: "Polygon"; coordinates: number[][][] };
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export type GeoJsonMultiPolygon = {
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type: "MultiPolygon";
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coordinates: number[][][][];
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};
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export type GeoJsonFeature = {
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type: "Feature";
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properties: Record<string, unknown>;
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geometry: GeoJsonPolygon | GeoJsonMultiPolygon | null;
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};
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export type GeoJsonFeatureCollection = {
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type: "FeatureCollection";
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features: GeoJsonFeature[];
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};
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const ringArea = (ring: number[][]) => {
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let area = 0;
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for (let i = 0; i < ring.length - 1; i++) {
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const curr = ring[i]!;
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const next = ring[i + 1]!;
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area += curr[0]! * next[1]! - next[0]! * curr[1]!;
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}
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return area / 2;
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};
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const isClockwise = (ring: number[][]) => ringArea(ring) < 0;
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const closeRing = (ring: number[][]) => {
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if (ring.length === 0) return ring;
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const first = ring[0]!;
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const last = ring[ring.length - 1]!;
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return first[0] !== last[0] || first[1] !== last[1]
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? [...ring, [first[0]!, first[1]!]]
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: ring;
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};
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const ringsToPolygons = (rings: number[][][]) => {
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const polygons: number[][][][] = [];
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let current: number[][][] | null = null;
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for (const ring of rings) {
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const closed = closeRing(ring);
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if (closed.length < 4) continue;
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if (isClockwise(closed) || !current) {
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if (current) polygons.push(current);
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current = [closed];
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} else {
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current.push(closed);
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}
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}
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if (current) polygons.push(current);
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return polygons;
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};
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export const esriToGeojson = (
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features: EsriFeature[],
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): GeoJsonFeatureCollection => {
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const geoFeatures: GeoJsonFeature[] = [];
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for (const feature of features) {
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const rings = feature.geometry?.rings;
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if (!rings?.length) continue;
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const polygons = ringsToPolygons(rings);
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if (!polygons.length) continue;
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const geometry: GeoJsonPolygon | GeoJsonMultiPolygon =
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polygons.length === 1
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? { type: "Polygon", coordinates: polygons[0]! }
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: { type: "MultiPolygon", coordinates: polygons };
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geoFeatures.push({
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type: "Feature",
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properties: feature.attributes ?? {},
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geometry,
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});
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}
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return { type: "FeatureCollection", features: geoFeatures };
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};
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