@geogirafe/lib-geoportal/tools/geometrytools.js

GeoGirafe is a flexible application to build online geoportals.

import { fromLonLat } from 'ol/proj';
export function formatCoordinates(coords, locale) {
    const east = (Math.round(coords[0] * 100) / 100).toLocaleString(locale, { minimumFractionDigits: 2 });
    const nord = (Math.round(coords[1] * 100) / 100).toLocaleString(locale, { minimumFractionDigits: 2 });
    return [east, nord];
}
/**
 * @param coords 2 numbers
 * @param extent 4 numbers min max
 * @returns true if coords is intersects extent
 */
function isWithinExtent(coords, extent) {
    return coords[0] >= extent[0] && coords[0] <= extent[2] && coords[1] >= extent[1] && coords[1] <= extent[3];
}
/**
 * Will check if given coords can be mapped to a max extent
 * if not, an empty array is returned
 * @param coords [lat, lon], [lon, lat], [east, north] accepted
 * @param extent bbox of 4 numbers, typically maxExtent defined in config
 * @returns coords in provided srid if extent is given, otherwise, returns coords
 */
export function parseCoordinates(coords, extent, srid) {
    if (!extent) {
        return coords;
    }
    // when coordinates are in current srid, we check they are in extent
    if (isWithinExtent(coords, extent)) {
        return coords;
    }
    // if given [lon, lat]
    let [east, north] = fromLonLat(coords, srid);
    if (isWithinExtent([east, north], extent)) {
        return [east, north];
    }
    // if given [lat, long]
    coords.reverse();
    [east, north] = fromLonLat(coords, srid);
    if (isWithinExtent([east, north], extent)) {
        return [east, north];
    }
    return [];
}