js/src/geo/BboxVectorSource.js

   1
   2 import VectorSource from 'ol/source/Vector.js';
   3 import { bbox } from 'ol/loadingstrategy';
   4 import { transformToEpsg4326LatLonExtent } from './OpenLayersUtils.js';
   5
   6 export default class BboxVectorSource extends VectorSource {
   7         constructor(options) {
   8                 super(BboxVectorSource.processOptions(options));
   9         }
  10
  11         static processOptions(options) {
  12                 options.strategy = bbox;
  13                 options.url = function(extent, resolution, projection) {
  14                         var bbox = transformToEpsg4326LatLonExtent(extent, projection);
  15
  16                         const baseUrl = options.baseUrl;
  17                         // invert bbox order in order to have minLat,minLon,maxLat,maxLon as required by WFS 2.0.0
  18                         const url = baseUrl + '&bbox=' + bbox.join(',') + ',EPSG:4326';
  19                         return url;
  20                 }
  21                 return options;
  22         }
  23
  24
  25 }