Index: Application/Ringtoets/src/Application.Ringtoets.Storage/Create/BackgroundDataCreateExtensions.cs
===================================================================
diff -u -r5a5fe803bd7b9feef47a3ff1b0dac3fa42309aca -r2865b0fc522e96a2f12c47f29805b13259ecde4f
--- Application/Ringtoets/src/Application.Ringtoets.Storage/Create/BackgroundDataCreateExtensions.cs	(.../BackgroundDataCreateExtensions.cs)	(revision 5a5fe803bd7b9feef47a3ff1b0dac3fa42309aca)
+++ Application/Ringtoets/src/Application.Ringtoets.Storage/Create/BackgroundDataCreateExtensions.cs	(.../BackgroundDataCreateExtensions.cs)	(revision 2865b0fc522e96a2f12c47f29805b13259ecde4f)
@@ -38,23 +38,14 @@
         /// <see cref="BackgroundData"/>.
         /// </summary>
         /// <param name="backgroundData">The container to create a <see cref="BackgroundDataEntity"/> for.</param>
-        /// <returns>The entity, or <c>null</c> if <see cref="BackgroundData.BackgroundMapDataType"/> is not supported.</returns>
+        /// <returns>The created <see cref="BackgroundDataEntity"/>.</returns>
         internal static BackgroundDataEntity Create(this BackgroundData backgroundData)
         {
             if (backgroundData == null)
             {
                 throw new ArgumentNullException(nameof(backgroundData));
             }
-            
-            if (backgroundData.BackgroundMapDataType == BackgroundMapDataType.Wmts)
-            {
-                return CreateWithWmtsData(backgroundData);
-            }
-            return null; // TODO: WTI-1141
-        }
 
-        private static BackgroundDataEntity CreateWithWmtsData(BackgroundData backgroundData)
-        {
             var entity = new BackgroundDataEntity
             {
                 Name = backgroundData.Name.DeepClone(),
@@ -67,7 +58,6 @@
             {
                 AddEntitiesForBackgroundDataMeta(backgroundData, entity);
             }
-
             return entity;
         }
 
Index: Application/Ringtoets/src/Application.Ringtoets.Storage/Read/BackgroundDataEntityReadExtensions.cs
===================================================================
diff -u -r5a5fe803bd7b9feef47a3ff1b0dac3fa42309aca -r2865b0fc522e96a2f12c47f29805b13259ecde4f
--- Application/Ringtoets/src/Application.Ringtoets.Storage/Read/BackgroundDataEntityReadExtensions.cs	(.../BackgroundDataEntityReadExtensions.cs)	(revision 5a5fe803bd7b9feef47a3ff1b0dac3fa42309aca)
+++ Application/Ringtoets/src/Application.Ringtoets.Storage/Read/BackgroundDataEntityReadExtensions.cs	(.../BackgroundDataEntityReadExtensions.cs)	(revision 2865b0fc522e96a2f12c47f29805b13259ecde4f)
@@ -64,7 +64,7 @@
                 {
                     KeyValuePair<string, string> parameter = backgroundDataMetaEntity.Read();
 
-                    if (ValidKey(parameter.Key))
+                    if (ValidKey(parameter.Key, backgroundData.BackgroundMapDataType))
                     {
                         backgroundData.Parameters[parameter.Key] = parameter.Value;
                     }
@@ -74,11 +74,13 @@
             return backgroundData;
         }
 
-        private static bool ValidKey(string keyToValidate)
+        private static bool ValidKey(string keyToValidate, BackgroundMapDataType backgroundMapDataType)
         {
-            return keyToValidate == BackgroundDataIdentifiers.SourceCapabilitiesUrl
-                   || keyToValidate == BackgroundDataIdentifiers.SelectedCapabilityIdentifier
-                   || keyToValidate == BackgroundDataIdentifiers.PreferredFormat;
+            return backgroundMapDataType == BackgroundMapDataType.Wmts
+                       ? keyToValidate == BackgroundDataIdentifiers.SourceCapabilitiesUrl
+                         || keyToValidate == BackgroundDataIdentifiers.SelectedCapabilityIdentifier
+                         || keyToValidate == BackgroundDataIdentifiers.PreferredFormat
+                       : keyToValidate == BackgroundDataIdentifiers.WellKnownTileSource;
         }
     }
 }
\ No newline at end of file
Index: Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/BackgroundDataCreateExtensionsTest.cs
===================================================================
diff -u -r5a5fe803bd7b9feef47a3ff1b0dac3fa42309aca -r2865b0fc522e96a2f12c47f29805b13259ecde4f
--- Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/BackgroundDataCreateExtensionsTest.cs	(.../BackgroundDataCreateExtensionsTest.cs)	(revision 5a5fe803bd7b9feef47a3ff1b0dac3fa42309aca)
+++ Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Create/BackgroundDataCreateExtensionsTest.cs	(.../BackgroundDataCreateExtensionsTest.cs)	(revision 2865b0fc522e96a2f12c47f29805b13259ecde4f)
@@ -25,7 +25,6 @@
 using Core.Common.Base.Data;
 using NUnit.Framework;
 using Ringtoets.Common.Data.AssessmentSection;
-using Ringtoets.Common.Data.TestUtil;
 
 namespace Application.Ringtoets.Storage.Test.Create
 {
@@ -49,7 +48,7 @@
         [Test]
         [TestCase(true)]
         [TestCase(false)]
-        public void Create_BackgroundDataWithTypeWmts_ReturnsBackgroundMapDataEntity(bool isConfigured)
+        public void Create_Always_ReturnsBackgroundMapDataEntity(bool isConfigured)
         {
             // Setup
             const string name = "background";
@@ -109,18 +108,5 @@
                 CollectionAssert.IsEmpty(entity.BackgroundDataMetaEntities);
             }
         }
-
-        [Test]
-        public void Create_BackgroundDataTypeWellKnown_ReturnsNull()
-        {
-            // Setup
-            var backgroundData = BackgroundDataTestDataGenerator.GetWellKnownBackgroundMapData();
-
-            // Call
-            BackgroundDataEntity entity = backgroundData.Create();
-
-            // Assert
-            Assert.IsNull(entity); // TODO: WTI-1141
-        }
     }
 }
\ No newline at end of file
Index: Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Read/BackgroundDataEntityReadExtensionsTest.cs
===================================================================
diff -u -r5a5fe803bd7b9feef47a3ff1b0dac3fa42309aca -r2865b0fc522e96a2f12c47f29805b13259ecde4f
--- Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Read/BackgroundDataEntityReadExtensionsTest.cs	(.../BackgroundDataEntityReadExtensionsTest.cs)	(revision 5a5fe803bd7b9feef47a3ff1b0dac3fa42309aca)
+++ Application/Ringtoets/test/Application.Ringtoets.Storage.Test/Read/BackgroundDataEntityReadExtensionsTest.cs	(.../BackgroundDataEntityReadExtensionsTest.cs)	(revision 2865b0fc522e96a2f12c47f29805b13259ecde4f)
@@ -46,7 +46,7 @@
         }
 
         [Test]
-        public void Read_WithEntity_ReturnBackgroundData()
+        public void Read_EntityWithWmtsData_ReturnBackgroundData()
         {
             // Setup
             const string name = "map data";
@@ -56,8 +56,9 @@
             const bool isVisible = false;
             const double transparancy = 0.4;
             const bool isConfigured = true;
-            const BackgroundMapDataType backgroundMapDataType = BackgroundMapDataType.Wmts;
 
+            BackgroundMapDataType backgroundMapDataType = BackgroundMapDataType.Wmts;
+
             var entity = new BackgroundDataEntity
             {
                 Name = name,
@@ -101,6 +102,48 @@
         }
 
         [Test]
+        public void Read_EntityWithWellKnownData_ReturnBackgroundData()
+        {
+            // Setup
+            const string name = "map data";
+            const bool isVisible = false;
+            const double transparancy = 0.4;
+            const bool isConfigured = true;
+
+            BackgroundMapDataType backgroundMapDataType = BackgroundMapDataType.WellKnown;
+            var enumNumber = (int) backgroundMapDataType;
+
+            var entity = new BackgroundDataEntity
+            {
+                Name = name,
+                BackgroundDataMetaEntities = new List<BackgroundDataMetaEntity>
+                {
+                    new BackgroundDataMetaEntity
+                    {
+                        Key = BackgroundDataIdentifiers.WellKnownTileSource,
+                        Value = enumNumber.ToString()
+                    }
+                },
+                IsVisible = Convert.ToByte(isVisible),
+                Transparency = transparancy,
+                IsConfigured = Convert.ToByte(isConfigured),
+                BackgroundDataType = Convert.ToByte(backgroundMapDataType)
+            };
+
+            // Call
+             BackgroundData backgroundData = entity.Read();
+
+            // Assert
+            Assert.AreEqual(isVisible, backgroundData.IsVisible);
+            Assert.AreEqual(transparancy, backgroundData.Transparency.Value);
+
+            Assert.AreEqual(name, backgroundData.Name);
+            Assert.AreEqual(enumNumber, Convert.ToInt32(backgroundData.Parameters[BackgroundDataIdentifiers.WellKnownTileSource]));
+            Assert.AreEqual(isConfigured, backgroundData.IsConfigured);
+            Assert.AreEqual(backgroundMapDataType, backgroundData.BackgroundMapDataType);
+        }
+
+        [Test]
         public void Read_IsConfiguredFalse_NoParametersAdded()
         {
             // Setup
@@ -138,33 +181,72 @@
         }
 
         [Test]
-        public void Read_BackgroundDataMetaEntityKeyNotValid_MetaDataNotAddedToBackgroundData()
+        [TestCase(BackgroundMapDataType.Wmts)]
+        [TestCase(BackgroundMapDataType.WellKnown)]
+        public void Read_BackgroundDataMetaEntityKeyNotValid_MetaDataNotAddedToBackgroundData(BackgroundMapDataType backgroundMapDataType)
         {
             // Setup
+            const string invalidKey = "some key";
+
             var entity = new BackgroundDataEntity
             {
                 BackgroundDataMetaEntities = new List<BackgroundDataMetaEntity>
                 {
                     new BackgroundDataMetaEntity
                     {
-                        Key = "some key",
+                        Key = invalidKey,
                         Value = "//url"
                     },
                     new BackgroundDataMetaEntity
                     {
                         Key = BackgroundDataIdentifiers.SelectedCapabilityIdentifier,
-                        Value = "capability name"
+                        Value = "SelectedCapabilityIdentifier"
+                    },
+                    new BackgroundDataMetaEntity
+                    {
+                        Key = BackgroundDataIdentifiers.SourceCapabilitiesUrl,
+                        Value = "SourceCapabilitiesUrl"
+                    },
+                    new BackgroundDataMetaEntity
+                    {
+                        Key = BackgroundDataIdentifiers.PreferredFormat,
+                        Value = "PreferredFormat"
+                    },
+                    new BackgroundDataMetaEntity
+                    {
+                        Key = BackgroundDataIdentifiers.WellKnownTileSource,
+                        Value = "WellKnownTileSource"
                     }
                 },
-                IsConfigured = Convert.ToByte(true)
+                IsConfigured = Convert.ToByte(true),
+                BackgroundDataType = Convert.ToByte(backgroundMapDataType)
             };
 
             // Call
             BackgroundData backgroundData = entity.Read();
 
             // Assert
-            Assert.AreEqual(1, backgroundData.Parameters.Count);
-            CollectionAssert.DoesNotContain(backgroundData.Parameters, "some key");
+            var addedKeys = new List<string>();
+            foreach (KeyValuePair<string, string> backgroundDataParameter in backgroundData.Parameters)
+            {
+                addedKeys.Add(backgroundDataParameter.Key);
+            }
+
+            if (backgroundMapDataType == BackgroundMapDataType.Wmts)
+            {
+                Assert.AreEqual(3, backgroundData.Parameters.Count);
+
+                CollectionAssert.Contains(addedKeys, BackgroundDataIdentifiers.SourceCapabilitiesUrl);
+                CollectionAssert.Contains(addedKeys, BackgroundDataIdentifiers.SelectedCapabilityIdentifier);
+                CollectionAssert.Contains(addedKeys, BackgroundDataIdentifiers.PreferredFormat);
+            }
+            else if (backgroundMapDataType == BackgroundMapDataType.WellKnown)
+            {
+                Assert.AreEqual(1, backgroundData.Parameters.Count);
+                CollectionAssert.Contains(addedKeys, BackgroundDataIdentifiers.WellKnownTileSource);
+            }
+
+            CollectionAssert.DoesNotContain(addedKeys, invalidKey);
         }
     }
 }
\ No newline at end of file
Index: Ringtoets/Common/src/Ringtoets.Common.Data/AssessmentSection/BackgroundDataIdentifiers.cs
===================================================================
diff -u -rb50726abfd7d4bbda64385e9c7b2c781d2c594ed -r2865b0fc522e96a2f12c47f29805b13259ecde4f
--- Ringtoets/Common/src/Ringtoets.Common.Data/AssessmentSection/BackgroundDataIdentifiers.cs	(.../BackgroundDataIdentifiers.cs)	(revision b50726abfd7d4bbda64385e9c7b2c781d2c594ed)
+++ Ringtoets/Common/src/Ringtoets.Common.Data/AssessmentSection/BackgroundDataIdentifiers.cs	(.../BackgroundDataIdentifiers.cs)	(revision 2865b0fc522e96a2f12c47f29805b13259ecde4f)
@@ -40,5 +40,10 @@
         /// The identifier for the preferred format.
         /// </summary>
         public const string PreferredFormat = "PreferredFormat";
+
+        /// <summary>
+        /// The identifier for the well known tile source.
+        /// </summary>
+        public const string WellKnownTileSource = "WellKnownTileSource";
     }
 }
\ No newline at end of file
Index: Ringtoets/Common/test/Ringtoets.Common.Data.Test/AssessmentSection/BackgroundDataIdentifiersTest.cs
===================================================================
diff -u -rb50726abfd7d4bbda64385e9c7b2c781d2c594ed -r2865b0fc522e96a2f12c47f29805b13259ecde4f
--- Ringtoets/Common/test/Ringtoets.Common.Data.Test/AssessmentSection/BackgroundDataIdentifiersTest.cs	(.../BackgroundDataIdentifiersTest.cs)	(revision b50726abfd7d4bbda64385e9c7b2c781d2c594ed)
+++ Ringtoets/Common/test/Ringtoets.Common.Data.Test/AssessmentSection/BackgroundDataIdentifiersTest.cs	(.../BackgroundDataIdentifiersTest.cs)	(revision 2865b0fc522e96a2f12c47f29805b13259ecde4f)
@@ -33,6 +33,7 @@
             Assert.AreEqual("SourceCapabilitiesUrl", BackgroundDataIdentifiers.SourceCapabilitiesUrl);
             Assert.AreEqual("SelectedCapabilityIdentifier", BackgroundDataIdentifiers.SelectedCapabilityIdentifier);
             Assert.AreEqual("PreferredFormat", BackgroundDataIdentifiers.PreferredFormat);
+            Assert.AreEqual("WellKnownTileSource", BackgroundDataIdentifiers.WellKnownTileSource);
         }
     }
 }
\ No newline at end of file