saftey commit

package.nw/lib/gt.js

@@ -5537,6 +5537,7 @@ function initMap()
   createGlobalMapLayer("long-grids", 3000);
   createGlobalMapLayer("short-grids", 8000, 3001);
   createGlobalMapLayer("big-grids", 50000, 3001);
+  createGlobalMapLayer("pota");
   createGlobalMapLayer("psk-flights");
   createGlobalMapLayer("psk-spots");
   createGlobalMapLayer("psk-hop");
@@ -5570,6 +5571,7 @@ function initMap()
       g_layerVectors["long-grids"],
       g_layerVectors["short-grids"],
       g_layerVectors["big-grids"],
+      g_layerVectors.pota,
       g_layerVectors["psk-flights"],
       g_layerVectors["psk-spots"],
       g_layerVectors["psk-hop"],

package.nw/lib/pota.js

@@ -11,6 +11,14 @@ var g_pota = {
   spotsTimeout: null
 };
 
+var g_parks = {};
+
+var g_defaultPark = {
+  scheduled: false,
+  spotted: false,
+  feature: false
+}
+
 function initPota()
 {
   potaImg.style.filter = g_potaEnabled == 1 ? "" : "grayscale(1)";
@@ -38,6 +46,10 @@ function togglePota()
     getPotaSchedule();
     getPotaSpots();
   }
+  else
+  {
+     g_layerSources.pota.clear();
+  }
 }
 
 function processPotaPlaces(buffer)