Index: Ringtoets/Common/src/Ringtoets.Common.Data/AssessmentSection/ReferenceLine.cs
===================================================================
diff -u -r8c7c25ee0b61c182e38073f56cb6376c511ccbf2 -rbb7246a859710e284b10c855848be97b8bc0b463
--- Ringtoets/Common/src/Ringtoets.Common.Data/AssessmentSection/ReferenceLine.cs	(.../ReferenceLine.cs)	(revision 8c7c25ee0b61c182e38073f56cb6376c511ccbf2)
+++ Ringtoets/Common/src/Ringtoets.Common.Data/AssessmentSection/ReferenceLine.cs	(.../ReferenceLine.cs)	(revision bb7246a859710e284b10c855848be97b8bc0b463)
@@ -47,6 +47,7 @@
 
         /// <summary>
         /// Gets the total length of the reference line.
+        /// [m]
         /// </summary>
         public double Length { get; private set; }
 
Index: Ringtoets/Common/src/Ringtoets.Common.Forms/Factories/RingtoetsMapDataFeaturesFactory.cs
===================================================================
diff -u -r39e266b1a41bc2ffda5578b019634afd559b92a4 -rbb7246a859710e284b10c855848be97b8bc0b463
--- Ringtoets/Common/src/Ringtoets.Common.Forms/Factories/RingtoetsMapDataFeaturesFactory.cs	(.../RingtoetsMapDataFeaturesFactory.cs)	(revision 39e266b1a41bc2ffda5578b019634afd559b92a4)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/Factories/RingtoetsMapDataFeaturesFactory.cs	(.../RingtoetsMapDataFeaturesFactory.cs)	(revision bb7246a859710e284b10c855848be97b8bc0b463)
@@ -84,7 +84,7 @@
                 MapFeature feature = CreateSingleLineMapFeature(referenceLine.Points);
                 feature.MetaData[Resources.MetaData_ID] = id;
                 feature.MetaData[Resources.MetaData_Name] = name;
-                feature.MetaData[Resources.MetaData_Length] = new RoundedDouble(2, Math2D.Length(referenceLine.Points));
+                feature.MetaData[Resources.MetaData_Length] = new RoundedDouble(2, referenceLine.Length);
 
                 return new[]
                 {
@@ -131,10 +131,12 @@
             {
                 throw new ArgumentNullException(nameof(hydraulicBoundaryLocations));
             }
+
             if (designWaterLevelAttributeName == null)
             {
                 throw new ArgumentNullException(nameof(designWaterLevelAttributeName));
             }
+
             if (waveHeightAttributeName == null)
             {
                 throw new ArgumentNullException(nameof(waveHeightAttributeName));
@@ -227,8 +229,10 @@
                     mapFeatures[i] = feature;
                     i++;
                 }
+
                 return mapFeatures;
             }
+
             return new MapFeature[0];
         }
 
@@ -255,8 +259,10 @@
 
                     mapFeatures[i] = feature;
                 }
+
                 return mapFeatures;
             }
+
             return new MapFeature[0];
         }
 
@@ -282,8 +288,10 @@
                     mapFeatures[i] = feature;
                     i++;
                 }
+
                 return mapFeatures;
             }
+
             return new MapFeature[0];
         }
 
@@ -341,6 +349,7 @@
 
                     features[i] = feature;
                 }
+
                 return features;
             }
 
Index: Ringtoets/Common/src/Ringtoets.Common.Forms/Properties/Resources.Designer.cs
===================================================================
diff -u -r09a2360e1ee2624ea986c6338ef1c3ca65e8c215 -rbb7246a859710e284b10c855848be97b8bc0b463
--- Ringtoets/Common/src/Ringtoets.Common.Forms/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision 09a2360e1ee2624ea986c6338ef1c3ca65e8c215)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision bb7246a859710e284b10c855848be97b8bc0b463)
@@ -2111,7 +2111,7 @@
         }
         
         /// <summary>
-        ///   Looks up a localized string similar to Lengte.
+        ///   Looks up a localized string similar to Lengte*.
         /// </summary>
         public static string MetaData_Length {
             get {
Index: Ringtoets/Common/src/Ringtoets.Common.Forms/Properties/Resources.resx
===================================================================
diff -u -r09a2360e1ee2624ea986c6338ef1c3ca65e8c215 -rbb7246a859710e284b10c855848be97b8bc0b463
--- Ringtoets/Common/src/Ringtoets.Common.Forms/Properties/Resources.resx	(.../Resources.resx)	(revision 09a2360e1ee2624ea986c6338ef1c3ca65e8c215)
+++ Ringtoets/Common/src/Ringtoets.Common.Forms/Properties/Resources.resx	(.../Resources.resx)	(revision bb7246a859710e284b10c855848be97b8bc0b463)
@@ -839,7 +839,7 @@
     <value>Koppelingsafstand</value>
   </data>
   <data name="MetaData_Length" xml:space="preserve">
-    <value>Lengte</value>
+    <value>Lengte*</value>
   </data>
   <data name="DistributionType_TruncatedNormal" xml:space="preserve">
     <value>Normaal (afgekapt)</value>
Index: Ringtoets/Common/test/Ringtoets.Common.Forms.Test/Factories/RingtoetsMapDataFeaturesFactoryTest.cs
===================================================================
diff -u -r90a24386ddda4f2807a22df1b7da6db5c794d790 -rbb7246a859710e284b10c855848be97b8bc0b463
--- Ringtoets/Common/test/Ringtoets.Common.Forms.Test/Factories/RingtoetsMapDataFeaturesFactoryTest.cs	(.../RingtoetsMapDataFeaturesFactoryTest.cs)	(revision 90a24386ddda4f2807a22df1b7da6db5c794d790)
+++ Ringtoets/Common/test/Ringtoets.Common.Forms.Test/Factories/RingtoetsMapDataFeaturesFactoryTest.cs	(.../RingtoetsMapDataFeaturesFactoryTest.cs)	(revision bb7246a859710e284b10c855848be97b8bc0b463)
@@ -109,7 +109,7 @@
             Assert.AreEqual(name, mapFeature.MetaData["Naam"]);
 
             var expectedLength = new RoundedDouble(2, Math2D.Length(points));
-            Assert.AreEqual(expectedLength, (RoundedDouble) mapFeature.MetaData["Lengte"], expectedLength.GetAccuracy());
+            Assert.AreEqual(expectedLength, (RoundedDouble) mapFeature.MetaData["Lengte*"], expectedLength.GetAccuracy());
             AssertEqualPointCollections(points, mapFeature.MapGeometries.ElementAt(0));
         }
 
@@ -295,7 +295,7 @@
 
                 Assert.AreEqual(sections[i].Name, features.ElementAt(i).MetaData["Naam"]);
                 var expectedLength = new RoundedDouble(2, Math2D.Length(sections[i].Points));
-                Assert.AreEqual(expectedLength, (RoundedDouble) features.ElementAt(i).MetaData["Lengte"], expectedLength.GetAccuracy());
+                Assert.AreEqual(expectedLength, (RoundedDouble) features.ElementAt(i).MetaData["Lengte*"], expectedLength.GetAccuracy());
 
                 AssertEqualPointCollections(sections[i].Points, features.ElementAt(i).MapGeometries.First());
             }
Index: Ringtoets/Integration/src/Ringtoets.Integration.Data/AssessmentSection.cs
===================================================================
diff -u -r44cf5bc0f292171637b0c91b74005effe4d2798c -rbb7246a859710e284b10c855848be97b8bc0b463
--- Ringtoets/Integration/src/Ringtoets.Integration.Data/AssessmentSection.cs	(.../AssessmentSection.cs)	(revision 44cf5bc0f292171637b0c91b74005effe4d2798c)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Data/AssessmentSection.cs	(.../AssessmentSection.cs)	(revision bb7246a859710e284b10c855848be97b8bc0b463)
@@ -23,7 +23,6 @@
 using System.Collections.Generic;
 using System.ComponentModel;
 using Core.Common.Base;
-using Core.Common.Base.Geometry;
 using Ringtoets.ClosingStructures.Data;
 using Ringtoets.Common.Data;
 using Ringtoets.Common.Data.AssessmentSection;
@@ -219,8 +218,8 @@
             set
             {
                 referenceLine = value;
-                Piping.PipingProbabilityAssessmentInput.SectionLength = value == null ? double.NaN : Math2D.Length(value.Points);
-                MacroStabilityInwards.MacroStabilityInwardsProbabilityAssessmentInput.SectionLength = value == null ? double.NaN : Math2D.Length(value.Points);
+                Piping.PipingProbabilityAssessmentInput.SectionLength = value?.Length ?? double.NaN;
+                MacroStabilityInwards.MacroStabilityInwardsProbabilityAssessmentInput.SectionLength = value?.Length ?? double.NaN;
             }
         }
 
@@ -313,6 +312,7 @@
                 default:
                     throw new NotSupportedException($"The enum value {nameof(AssessmentSectionComposition)}.{newComposition} is not supported.");
             }
+
             Composition = newComposition;
             SetFailureMechanismRelevancy();
         }
Index: Ringtoets/Integration/src/Ringtoets.Integration.Forms/Properties/Resources.Designer.cs
===================================================================
diff -u -r16a0e2a1a7df8a5fe4548b9c8839a44f4b871c0b -rbb7246a859710e284b10c855848be97b8bc0b463
--- Ringtoets/Integration/src/Ringtoets.Integration.Forms/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision 16a0e2a1a7df8a5fe4548b9c8839a44f4b871c0b)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Forms/Properties/Resources.Designer.cs	(.../Resources.Designer.cs)	(revision bb7246a859710e284b10c855848be97b8bc0b463)
@@ -670,7 +670,7 @@
         }
         
         /// <summary>
-        ///   Looks up a localized string similar to Totale lengte van het traject in meters..
+        ///   Looks up a localized string similar to Totale lengte van het traject in meters (afgerond)..
         /// </summary>
         public static string ReferenceLineProperties_Length_Description {
             get {
@@ -679,7 +679,7 @@
         }
         
         /// <summary>
-        ///   Looks up a localized string similar to Lengte [m].
+        ///   Looks up a localized string similar to Lengte* [m].
         /// </summary>
         public static string ReferenceLineProperties_Length_DisplayName {
             get {
Index: Ringtoets/Integration/src/Ringtoets.Integration.Forms/Properties/Resources.resx
===================================================================
diff -u -r16a0e2a1a7df8a5fe4548b9c8839a44f4b871c0b -rbb7246a859710e284b10c855848be97b8bc0b463
--- Ringtoets/Integration/src/Ringtoets.Integration.Forms/Properties/Resources.resx	(.../Resources.resx)	(revision 16a0e2a1a7df8a5fe4548b9c8839a44f4b871c0b)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Forms/Properties/Resources.resx	(.../Resources.resx)	(revision bb7246a859710e284b10c855848be97b8bc0b463)
@@ -349,9 +349,9 @@
     <value>Lijst van alle coördinaten (X-coördinaat, Y-coördinaat) die samen de referentielijn vormen.</value>
   </data>
   <data name="ReferenceLineProperties_Length_DisplayName" xml:space="preserve">
-    <value>Lengte [m]</value>
+    <value>Lengte* [m]</value>
   </data>
   <data name="ReferenceLineProperties_Length_Description" xml:space="preserve">
-    <value>Totale lengte van het traject in meters.</value>
+    <value>Totale lengte van het traject in meters (afgerond).</value>
   </data>
 </root>
\ No newline at end of file
Index: Ringtoets/Integration/src/Ringtoets.Integration.Forms/PropertyClasses/ReferenceLineProperties.cs
===================================================================
diff -u -r01aeb66af89298c610809907bff83d9b9764c897 -rbb7246a859710e284b10c855848be97b8bc0b463
--- Ringtoets/Integration/src/Ringtoets.Integration.Forms/PropertyClasses/ReferenceLineProperties.cs	(.../ReferenceLineProperties.cs)	(revision 01aeb66af89298c610809907bff83d9b9764c897)
+++ Ringtoets/Integration/src/Ringtoets.Integration.Forms/PropertyClasses/ReferenceLineProperties.cs	(.../ReferenceLineProperties.cs)	(revision bb7246a859710e284b10c855848be97b8bc0b463)
@@ -22,6 +22,7 @@
 using System;
 using System.ComponentModel;
 using System.Linq;
+using Core.Common.Base.Data;
 using Core.Common.Base.Geometry;
 using Core.Common.Gui.Attributes;
 using Core.Common.Gui.Converters;
@@ -60,11 +61,11 @@
         [ResourcesCategory(typeof(RingtoetsCommonFormsResources), nameof(RingtoetsCommonFormsResources.Categories_General))]
         [ResourcesDisplayName(typeof(Resources), nameof(Resources.ReferenceLineProperties_Length_DisplayName))]
         [ResourcesDescription(typeof(Resources), nameof(Resources.ReferenceLineProperties_Length_Description))]
-        public double Length
+        public RoundedDouble Length
         {
             get
             {
-                return data.Length;
+                return new RoundedDouble(2, data.Length);
             }
         }
 
Index: Ringtoets/Integration/test/Ringtoets.Integration.Forms.Test/PropertyClasses/ReferenceLinePropertiesTest.cs
===================================================================
diff -u -r16a0e2a1a7df8a5fe4548b9c8839a44f4b871c0b -rbb7246a859710e284b10c855848be97b8bc0b463
--- Ringtoets/Integration/test/Ringtoets.Integration.Forms.Test/PropertyClasses/ReferenceLinePropertiesTest.cs	(.../ReferenceLinePropertiesTest.cs)	(revision 16a0e2a1a7df8a5fe4548b9c8839a44f4b871c0b)
+++ Ringtoets/Integration/test/Ringtoets.Integration.Forms.Test/PropertyClasses/ReferenceLinePropertiesTest.cs	(.../ReferenceLinePropertiesTest.cs)	(revision bb7246a859710e284b10c855848be97b8bc0b463)
@@ -28,6 +28,7 @@
 using Core.Common.TestUtil;
 using NUnit.Framework;
 using Ringtoets.Common.Data.AssessmentSection;
+using Ringtoets.Common.Data.TestUtil;
 using Ringtoets.Integration.Forms.PropertyClasses;
 
 namespace Ringtoets.Integration.Forms.Test.PropertyClasses
@@ -79,7 +80,8 @@
             var properties = new ReferenceLineProperties(referenceLine);
 
             // Call & Assert
-            Assert.AreEqual(referenceLine.Length, properties.Length);
+            Assert.AreEqual(2, properties.Length.NumberOfDecimalPlaces);
+            Assert.AreEqual(referenceLine.Length, properties.Length, properties.Length.GetAccuracy());
             CollectionAssert.AreEqual(geometry, properties.Geometry);
         }
 
@@ -99,8 +101,8 @@
             PropertyDescriptor lengthProperty = dynamicProperties[0];
             PropertiesTestHelper.AssertRequiredPropertyDescriptorProperties(lengthProperty,
                                                                             generalCategoryName,
-                                                                            "Lengte [m]",
-                                                                            "Totale lengte van het traject in meters.",
+                                                                            "Lengte* [m]",
+                                                                            "Totale lengte van het traject in meters (afgerond).",
                                                                             true);
 
             PropertyDescriptor geometryProperty = dynamicProperties[1];