Add openstreetmap as a default basemap.

Author: na9da

wwwroot/init/simple.json

@@ -762,7 +762,21 @@
   ],
   "viewerMode": "3dSmooth",
   "baseMaps": {
-    "defaultBaseMapId": "basemap-positron",
-    "previewBaseMapId": "basemap-positron"
+    "defaultBaseMapId": "basemap-openstreetmap",
+    "previewBaseMapId": "basemap-natural-earth-II",
+    "items": [
+      {
+        "item": {
+          "id": "basemap-openstreetmap",
+          "name": "Openstreetmap",
+          "type": "open-street-map",
+          "url": "https://tile.openstreetmap.org/",
+          "attribution": "© <a href='https://www.openstreetmap.org/copyright'>OpenStreetMap contributors</a>",
+          "opacity": 1.0
+        },
+        "image": "images/openstreetmap.png",
+        "contrastColor": "#000000"
+      }
+    ]
   }
 }