add GIBS relief layer

html/layers.js

@@ -156,6 +156,18 @@ function createBaseLayers() {
         world.push(vtlayer);
     }
 
+    world.push(new ol.layer.Tile({
+        source: new ol.source.OSM({
+            url: 'https://gibs-{a-c}.earthdata.nasa.gov/wmts/epsg3857/best/BlueMarble_ShadedRelief_Bathymetry/default/EPSG3857_500m/{z}/{y}/{x}.jpeg',
+            attributions: '<a href="https://terra.nasa.gov/about/terra-instruments/modis">MODIS Terra</a> ' +
+            + 'Provided by NASA\'s Global Imagery Browse Services (GIBS), part of NASA\'s Earth Observing System Data and Information System (EOSDIS)',
+            maxZoom: 8,
+        }),
+        name: 'gibs_reliev',
+        title: 'GIBS Relief',
+        type: 'base',
+    }));
+
     const date = new Date(Date.now() - 86400 * 1000);
     const yesterday = date.getUTCFullYear() + '-' + (date.getUTCMonth() + 1).toString().padStart(2, '0') + '-' + date.getUTCDate().toString().padStart(2, '0');
     world.push(new ol.layer.Tile({
@@ -169,7 +181,7 @@ function createBaseLayers() {
             maxZoom: 9,
         }),
         name: 'gibs',
-        title: 'NASA GIBS ' + yesterday,
+        title: 'GIBS Clouds ' + yesterday,
         type: 'base',
     }));
     // carto.com basemaps, see the following URLs for details on them: