Index: Ringtoets/Common/src/Ringtoets.Common.Forms/Views/FailureMechanismView.cs
===================================================================
diff -u -r31012b85637f7fcf6b28f498fc996edcda2eb505 -rb519fc798c63691f04bb8008b562a94ed9232d51
--- Ringtoets/Common/src/Ringtoets.Common.Forms/Views/FailureMechanismView.cs	(.../FailureMechanismView.cs)	(revision 31012b85637f7fcf6b28f498fc996edcda2eb505)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/Views/FailureMechanismView.cs	(.../FailureMechanismView.cs)	(revision b519fc798c63691f04bb8008b562a94ed9232d51)
@@ -41,6 +41,7 @@
         private readonly Observer failureMechanismObserver;
         private readonly Observer assessmentSectionObserver;
         private readonly Observer hydraulicBoundaryDatabaseObserver;
+        private readonly Observer backgroundMapDataObserver;
 
         private readonly MapDataCollection mapDataCollection;
         private readonly MapLineData referenceLineMapData;
@@ -49,6 +50,8 @@
         private readonly MapPointData sectionsEndPointMapData;
         private readonly MapPointData hydraulicBoundaryLocationsMapData;
 
+        private WmtsMapData backgroundMapData;
+
         private FailureMechanismContext<T> data;
 
         /// <summary>
@@ -69,6 +72,7 @@
                 UpdateMapData();
             });
             hydraulicBoundaryDatabaseObserver = new Observer(UpdateMapData);
+            backgroundMapDataObserver = new Observer(UpdateBackgroundMapData);
 
             mapDataCollection = new MapDataCollection(defaultMapDataCollectionName);
             referenceLineMapData = RingtoetsMapDataFactory.CreateReferenceLineMapData();
@@ -100,6 +104,8 @@
                     assessmentSectionObserver.Observable = null;
                     hydraulicBoundaryDatabaseObserver.Observable = null;
 
+                    backgroundMapDataObserver.Observable = null;
+
                     mapDataCollection.Name = defaultMapDataCollectionName;
 
                     Map.Data = null;
@@ -113,10 +119,14 @@
                     mapDataCollection.Name = data.WrappedData.Name;
                     hydraulicBoundaryDatabaseObserver.Observable = data.Parent.HydraulicBoundaryDatabase;
 
+                    backgroundMapDataObserver.Observable = data.Parent.BackgroundMapData2;
+
                     SetMapDataFeatures();
 
+                    backgroundMapData = RingtoetsBackgroundMapDataFactory.CreateBackgroundMapData(data.Parent.BackgroundMapData2);
+
                     Map.Data = mapDataCollection;
-                    Map.BackgroundMapData = data.Parent.BackgroundMapData;
+                    Map.BackgroundMapData = backgroundMapData;
                 }
             }
         }
@@ -142,6 +152,12 @@
             base.Dispose(disposing);
         }
 
+        private void UpdateBackgroundMapData()
+        {
+            RingtoetsBackgroundMapDataFactory.UpdateBackgroundMapData(backgroundMapData, data.Parent.BackgroundMapData2);
+            backgroundMapData.NotifyObservers();
+        }
+
         private void UpdateMapData()
         {
             SetMapDataFeatures();