set new tileserver

app/static/assets/leaflet/utils.js

@@ -126,8 +126,9 @@ function getMap(){
     });
     L.control.scale().addTo(map);
     
-    L.tileLayer( 'https://geodata.nationaalgeoregister.nl/tiles/service/wmts/brtachtergrondkaartpastel/EPSG:3857/{z}/{x}/{y}.png', {
-        attribution: 'Kaartgegevens &copy; <a href="https://kadaster.nl">Kadaster</a>'
+    //pioneer,atlas,neighbourhood,transport
+    L.tileLayer( 'https://tile.thunderforest.com/pioneer/{z}/{x}/{y}.png?apikey=df457ee6c2dd4b6e99b24c853421a1db', {
+        attribution: 'Kaartgegevens &copy; <a href="https://www.thunderforest.com">Thunderforest</a>'
     }).addTo( map );
     return map
 }