js/src/geo/OpenLayersUtils.js

   1 import { transformExtent } from 'ol/proj.js';
   2
   3
   4 export function transformToEpsg4326LatLonExtent(extent, projection) {
   5         const proj = projection.getCode();
   6         if (proj === 'EPSG:4326')
   7                 return toLatLonExtent(extent);
   8         var transformed = transformExtent(extent, proj, 'EPSG:4326');
   9         return toLatLonExtent(transformed);
  10 }
  11
  12 /** From EPSG:4326 lat/lon to a proj lon/lat */
  13 export function transformToOlLonLatExtent(extent, projection) {
  14         const proj = projection.getCode();
  15         if (proj === 'EPSG:4326')
  16                 return toLonLatExtent(extent);
  17         const reordered = toLonLatExtent(extent);
  18         var transformed = transformExtent(reordered, 'EPSG:4326', proj);
  19         return transformed;
  20 }
  21
  22 /** Converts from an extent in OpenLayers order (lon/lat) to WFS 2.0 order (lat/lon). */
  23 export function toLatLonExtent(extent) {
  24         return [extent[1], extent[0], extent[3], extent[2]];
  25 }
  26
  27 /** Converts from an extent in WFS 2.0 order (lat/lon) to OpenLayers order (lon/lat) . */
  28 export function toLonLatExtent(extent) {
  29         return [extent[1], extent[0], extent[3], extent[2]];
  30 }
  31