Switch to tiles with added wrapper-object for future additional data

src/map/TileLoader.js

@@ -60,7 +60,8 @@ export class TileLoader {
 
         return new Promise((resolve, reject) => {
             this.fileLoader.load(tileUrl + '?' + this.tileCacheHash,
-                geometryJson => {
+                json => {
+                    let geometryJson = json.tileGeometry;
                     if (!geometryJson.type || geometryJson.type !== 'BufferGeometry'){
                         reject({status: "empty"});
                         return;