org.argeo.app.geo.js/OpenLayerTileSources.js

   1
   2 import WMTS from 'ol/source/WMTS.js';
   3 import WMTSTileGrid from 'ol/tilegrid/WMTS';
   4 import { getTopLeft } from 'ol/extent';
   5 import { getWidth } from 'ol/extent';
   6 import { get as getProjection } from 'ol/proj';
   7
   8 export class SentinelCloudless extends WMTS {
   9         static source_s2CL2019;
  10         static EPSG4326 = getProjection('EPSG:4326');
  11
  12         static resolutions;
  13         static matrixIds;
  14
  15         static {
  16                 let min_zoom = 6;
  17                 let max_zoom = 17;
  18                 let zoomOffset = 1;
  19
  20                 // from https://s2maps.eu/
  21                 let size = getWidth(this.EPSG4326.getExtent()) / 512;
  22                 this.resolutions = new Array(max_zoom + zoomOffset);
  23                 this.matrixIds = new Array(max_zoom + zoomOffset);
  24                 for (let z = min_zoom; z <= max_zoom; ++z) {
  25                         // generate resolutions and matrixIds arrays for this WMTS
  26                         this.resolutions[z] = size / Math.pow(2, z);
  27                         this.matrixIds[z] = z;
  28                 }
  29         }
  30
  31         constructor() {
  32                 super({
  33                         urls: [
  34                                 "//a.s2maps-tiles.eu/wmts/",
  35                                 "//b.s2maps-tiles.eu/wmts/",
  36                                 "//c.s2maps-tiles.eu/wmts/",
  37                                 "//d.s2maps-tiles.eu/wmts/",
  38                                 "//e.s2maps-tiles.eu/wmts/"
  39                         ],
  40                         layer: 's2cloudless-2021',
  41                         matrixSet: 'WGS84',
  42                         format: 'image/jpeg',
  43                         projection: SentinelCloudless.EPSG4326,
  44                         tileGrid: new WMTSTileGrid({
  45                                 origin: getTopLeft(SentinelCloudless.EPSG4326.getExtent()),
  46                                 resolutions: SentinelCloudless.resolutions,
  47                                 matrixIds: SentinelCloudless.matrixIds,
  48                         }),
  49                         style: 'default',
  50                         transition: 0,
  51                         wrapX: true
  52                 });
  53         }
  54 }