geocontext

import { fetchJSON } from '../helpers/http.js'; import logger from '../logger.js'; import _ from 'lodash'; /** * ADMINEXPRESS-COG.LATEST:{type} * * https://data.geopf.fr/wfs/ows?service=WFS&version=2.0.0&request=GetCapabilities */ export const ADMINEXPRESS_SOURCE = "Géoplateforme (WFS, ADMINEXPRESS-COG.LATEST)"; export const ADMINEXPRESS_TYPES = [ 'commune', 'canton', 'collectivite_territoriale', 'epci', 'departement', 'region', 'arrondissement' ]; /** * Get administrative units (commune, departement,...) intersecting a given location * * @param {number} lon * @param {number} lat * @returns {object[]} */ export async function getAdminUnits(lon, lat) { logger.info(`[adminexpress] getAdminUnits(${lon},${lat})...`); // note that EPSG:4326 means lat,lon order for GeoServer -> flipped coordinates... const cql_filter = `INTERSECTS(geometrie,Point(${lat} ${lon}))`; // TODO : avoid useless geometry retrieval at WFS level const url = 'https://data.geopf.fr/wfs?' + new URLSearchParams({ service: 'WFS', request: 'GetFeature', typeName: ADMINEXPRESS_TYPES.map((type) => { return `ADMINEXPRESS-COG.LATEST:${type}` }).join(','), outputFormat: 'application/json', cql_filter: cql_filter }).toString(); const featureCollection = await fetchJSON(url); return featureCollection.features.map((feature) => { // parse type from id (ex: "commune.3837") const type = feature.id.split('.')[0]; // ignore geometry and extend properties return Object.assign({ type: type, id: feature.id, bbox: feature.bbox }, feature.properties); }); }