Option to remove default base layers (#27)

config.js

@@ -66,6 +66,9 @@
     // External URL for key retrieval, does not work locally on desktop
     BR.conf.bingKeyUrl = 'http://norbertrenner.de/key/bing.php';
 
+    // Removes default base layers when 'true'. Useful for only having custom layers (see below).
+    BR.conf.clearBaseLayers = false;
+
     // Add custom tile layers
     // URL template see http://leafletjs.com/reference.html#tilelayer
     // Multiple entries separated by comma (,)

js/index.js

@@ -74,7 +74,6 @@
         });
 
         map = new L.Map('map', {
-            layers: [osm], 
             center: new L.LatLng(50.99, 9.86), 
             zoom: 6,
             worldCopyJump: true
@@ -97,11 +96,19 @@
              'Hiking (Waymarked Trails)': hiking
         };
 
+        if (BR.conf.clearBaseLayers) {
+            baseLayers = {};
+        }
         for (i in BR.conf.baseLayers) {
             if (BR.conf.baseLayers.hasOwnProperty(i)) {
                 baseLayers[i] = L.tileLayer(BR.conf.baseLayers[i]);
             }
         }
+        // after applying custom base layer configurations, add first base layer to map
+        var firstLayer = baseLayers[Object.keys(baseLayers)[0]];
+        if (firstLayer) {
+            map.addLayer(firstLayer);
+        }
 
         layersControl = L.control.layers(baseLayers, overlays).addTo(map);