isable();

  // add zoom control on lab map
  map.addControl(L.control.zoom({ position: 'topright' }));

  // basemap
  var osmTilesUrl = 'https://tile.openstreetmap.org/{z}/{x}/{y}.png';
  var osmAttrib = 'Map data Â© <a href="https://openstreetmap.org">OpenStreetMap</a> contributors';
  var osmLayer = new L.TileLayer(osmTilesUrl, { minZoom: 5, attribution: osmAttrib });
  // load basemaps
  osmLayer.addTo(map);

   const label = (lab) => {
       const baseOptions = {
           iconUrl: "/img/lab_marke