Index: Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Forms/Views/HeightStructuresFailureMechanismView.cs
===================================================================
diff -u -r31012b85637f7fcf6b28f498fc996edcda2eb505 -rb519fc798c63691f04bb8008b562a94ed9232d51
--- Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Forms/Views/HeightStructuresFailureMechanismView.cs	(.../HeightStructuresFailureMechanismView.cs)	(revision 31012b85637f7fcf6b28f498fc996edcda2eb505)
+++ Ringtoets/HeightStructures/src/Ringtoets.HeightStructures.Forms/Views/HeightStructuresFailureMechanismView.cs	(.../HeightStructuresFailureMechanismView.cs)	(revision b519fc798c63691f04bb8008b562a94ed9232d51)
@@ -48,6 +48,7 @@
         private readonly Observer hydraulicBoundaryDatabaseObserver;
         private readonly Observer foreshoreProfilesObserver;
         private readonly Observer structuresObserver;
+        private readonly Observer backgroundMapDataObserver;
 
         private readonly RecursiveObserver<CalculationGroup, HeightStructuresInput> calculationInputObserver;
         private readonly RecursiveObserver<CalculationGroup, CalculationGroup> calculationGroupObserver;
@@ -63,6 +64,8 @@
         private readonly MapPointData structuresMapData;
         private readonly MapLineData calculationsMapData;
 
+        private WmtsMapData backgroundMapData;
+
         private HeightStructuresFailureMechanismContext data;
 
         /// <summary>
@@ -85,6 +88,7 @@
             hydraulicBoundaryDatabaseObserver = new Observer(UpdateMapData);
             foreshoreProfilesObserver = new Observer(UpdateMapData);
             structuresObserver = new Observer(UpdateMapData);
+            backgroundMapDataObserver = new Observer(UpdateBackgroundMapData);
 
             calculationInputObserver = new RecursiveObserver<CalculationGroup, HeightStructuresInput>(
                 UpdateMapData, pcg => pcg.Children.Concat<object>(pcg.Children.OfType<StructuresCalculation<HeightStructuresInput>>().Select(pc => pc.InputParameters)));
@@ -132,6 +136,8 @@
                     calculationGroupObserver.Observable = null;
                     calculationObserver.Observable = null;
 
+                    backgroundMapDataObserver.Observable = null;
+
                     Map.Data = null;
                     Map.BackgroundMapData = null;
                 }
@@ -147,10 +153,14 @@
                     calculationGroupObserver.Observable = data.WrappedData.CalculationsGroup;
                     calculationObserver.Observable = data.WrappedData.CalculationsGroup;
 
+                    backgroundMapDataObserver.Observable = data.Parent.BackgroundMapData2;
+
                     SetMapDataFeatures();
 
+                    backgroundMapData = RingtoetsBackgroundMapDataFactory.CreateBackgroundMapData(data.Parent.BackgroundMapData2);
+
                     Map.Data = mapDataCollection;
-                    Map.BackgroundMapData = data.Parent.BackgroundMapData;
+                    Map.BackgroundMapData = backgroundMapData;
                 }
             }
         }
@@ -181,6 +191,12 @@
             base.Dispose(disposing);
         }
 
+        private void UpdateBackgroundMapData()
+        {
+            RingtoetsBackgroundMapDataFactory.UpdateBackgroundMapData(backgroundMapData, data.Parent.BackgroundMapData2);
+            backgroundMapData.NotifyObservers();
+        }
+
         private void UpdateMapData()
         {
             SetMapDataFeatures();