cesiumDemo/Source/Core/CartographicGeocoderService.js

import when from '../ThirdParty/when.js';
import Cartesian3 from './Cartesian3.js';
import Check from './Check.js';

    /**
     * Geocodes queries containing longitude and latitude coordinates and an optional height.
     * Query format: `longitude latitude (height)` with longitude/latitude in degrees and height in meters.
     *
     * @alias CartographicGeocoderService
     * @constructor
     */
    function CartographicGeocoderService() {
    }

    /**
     * @function
     *
     * @param {String} query The query to be sent to the geocoder service
     * @returns {Promise<GeocoderService~Result[]>}
     */
    CartographicGeocoderService.prototype.geocode = function(query) {
        //>>includeStart('debug', pragmas.debug);
        Check.typeOf.string('query', query);
        //>>includeEnd('debug');

        var splitQuery = query.match(/[^\s,\n]+/g);
        if ((splitQuery.length === 2) || (splitQuery.length === 3)) {
            var longitude = +splitQuery[0];
            var latitude = +splitQuery[1];
            var height = (splitQuery.length === 3) ? +splitQuery[2] : 300.0;

            if (isNaN(longitude) && isNaN(latitude)) {
                var coordTest = /^(\d+.?\d*)([nsew])/i;
                for (var i = 0; i < splitQuery.length; ++i) {
                    var splitCoord = splitQuery[i].match(coordTest);
                    if (coordTest.test(splitQuery[i]) && splitCoord.length === 3) {
                        if (/^[ns]/i.test(splitCoord[2])) {
                            latitude = (/^[n]/i.test(splitCoord[2])) ? +splitCoord[1] : -splitCoord[1];
                        } else if (/^[ew]/i.test(splitCoord[2])) {
                            longitude = (/^[e]/i.test(splitCoord[2])) ? +splitCoord[1] : -splitCoord[1];
                        }
                    }
                }
            }

            if (!isNaN(longitude) && !isNaN(latitude) && !isNaN(height)) {
                var result = {
                    displayName: query,
                    destination: Cartesian3.fromDegrees(longitude, latitude, height)
                };
                return when.resolve([result]);
            }
        }
        return when.resolve([]);
    };
export default CartographicGeocoderService;