Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/PlLinesCreator/SensorPlLineCreatorBaseTest.cs
===================================================================
diff -u
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/PlLinesCreator/SensorPlLineCreatorBaseTest.cs	(revision 0)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/PlLinesCreator/SensorPlLineCreatorBaseTest.cs	(revision 3339)
@@ -0,0 +1,142 @@
+// Copyright (C) Stichting Deltares 2019. All rights reserved.
+//
+// This file is part of the Dam Engine.
+//
+// The Dam Engine is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System;
+using System.Collections.Generic;
+using Deltares.DamEngine.Calculators.PlLinesCreator;
+using Deltares.DamEngine.Data.General;
+using Deltares.DamEngine.Data.General.PlLines;
+using Deltares.DamEngine.Data.General.Sensors;
+using Deltares.DamEngine.Data.Geometry;
+using Deltares.DamEngine.Data.Geotechnics;
+using Deltares.DamEngine.Data.Standard;
+using NUnit.Framework;
+
+namespace Deltares.DamEngine.Calculators.Tests.PlLinesCreator
+{
+    [TestFixture]
+    public class SensorPlLineCreatorBaseTest
+    {
+        [Test]
+        public void Constructor_WithArguments_ExpectedValues()
+        {
+            // Setup
+            var sensorLocation = new SensorLocation();
+            var sensorDictionary = new Dictionary<Sensor, double>();
+
+            // Call
+            var creator = new TestSensorPlLineCreatorBase(sensorLocation, PlLineType.Pl1, sensorDictionary);
+
+            // Assert
+            Assert.That(creator, Is.InstanceOf<IPlLineCreator>());
+        }
+
+        [Test]
+        public void GetSensorXValue_WithSensorXCoordinateGreaterThanZero_DoesNotOffsetCoordinate()
+        {
+            // Setup
+            var random = new Random(21);
+            var sensorLocation = new SensorLocation
+            {
+                Location = new Location
+                {
+                    SurfaceLine = CreateSurfaceLine(new[]
+                    {
+                        new GeometryPoint(random.NextDouble(), random.NextDouble()),
+                        new GeometryPoint(random.NextDouble(), random.NextDouble())
+                    })
+                }
+            };
+            var creator = new TestSensorPlLineCreatorBase(sensorLocation, PlLineType.Pl1, new Dictionary<Sensor, double>());
+
+            double relativeLocation = random.NextDouble();
+            var sensor = new Sensor
+            {
+                RelativeLocation = relativeLocation
+            };
+
+            // Call
+            double xCoordinate = creator.PublicGetSensorXValue(sensor);
+
+            // Assert
+            Assert.That(xCoordinate, Is.EqualTo(relativeLocation));
+        }
+
+        [Test]
+        public void GetSensorXValue_WithSensorXCoordinateLessThanZero_OffsetXCoordinateWithSurfaceLineWidth()
+        {
+            // Setup
+            var random = new Random(21);
+            SurfaceLine2 surfaceLine = CreateSurfaceLine(new[]
+            {
+                new GeometryPoint(random.NextDouble(), random.NextDouble()),
+                new GeometryPoint(random.NextDouble(), random.NextDouble())
+            });
+            var sensorLocation = new SensorLocation
+            {
+                Location = new Location
+                {
+                    SurfaceLine = surfaceLine
+                }
+            };
+            var creator = new TestSensorPlLineCreatorBase(sensorLocation, PlLineType.Pl1, new Dictionary<Sensor, double>());
+
+            double relativeLocation = -random.NextDouble();
+            var sensor = new Sensor
+            {
+                RelativeLocation = relativeLocation
+            };
+
+            // Call
+            double xCoordinate = creator.PublicGetSensorXValue(sensor);
+
+            // Assert
+            GeometryPointString surfaceLineGeometry = surfaceLine.Geometry;
+            double expectedXCoordinate = relativeLocation + (surfaceLineGeometry.GetMaxX() - surfaceLineGeometry.GetMinX());
+            Assert.That(xCoordinate, Is.EqualTo(expectedXCoordinate));
+        }
+
+
+        private static SurfaceLine2 CreateSurfaceLine(IEnumerable<GeometryPoint> coordinates)
+        {
+            var surfaceLine = new SurfaceLine2();
+            surfaceLine.Geometry.Points.AddRange(coordinates);
+            surfaceLine.Geometry.SyncCalcPoints();
+
+            return surfaceLine;
+        }
+
+        private class TestSensorPlLineCreatorBase : SensorPlLineCreatorBase
+        {
+            public TestSensorPlLineCreatorBase(SensorLocation sensorLocation, PlLineType type, IDictionary<Sensor, double> sensorValues) : base(sensorLocation, type, sensorValues) { }
+
+            public double PublicGetSensorXValue(Sensor sensor)
+            {
+                return GetSensorXValue(sensor);
+            }
+
+            public override PlLine CreatePlLine()
+            {
+                throw new NotImplementedException();
+            }
+        }
+    }
+}
\ No newline at end of file
Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators/PlLinesCreator/SensorPlLineCreatorBase.cs
===================================================================
diff -u -r1965 -r3339
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators/PlLinesCreator/SensorPlLineCreatorBase.cs	(.../SensorPlLineCreatorBase.cs)	(revision 1965)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators/PlLinesCreator/SensorPlLineCreatorBase.cs	(.../SensorPlLineCreatorBase.cs)	(revision 3339)
@@ -187,7 +187,9 @@
         /// <returns></returns>
         protected double GetSensorXValue(Sensor sensor)
         {
-            return sensor.RelativeLocation;
+            GeometryPointString surfaceLineGeometry = SensorLocation.SurfaceLine.Geometry;
+            double shift = surfaceLineGeometry.GetMaxX() - surfaceLineGeometry.GetMinX();
+            return GetSensorXLocation(sensor, shift);
         }
 
         /// <summary>
@@ -232,5 +234,22 @@
         /// </summary>
         /// <returns></returns>
         public abstract PlLine CreatePlLine();
+
+        /// <summary>
+        /// Gets the X coordinate of the sensor location.
+        /// </summary>
+        /// <param name="sensor">The <see cref="Sensor"/> to retrieve the X coordinate for.</param>
+        /// <param name="offset">The offset for the X Coordinate</param>
+        /// <returns>The X location of the sensor.</returns>
+        private static double GetSensorXLocation(Sensor sensor, double offset)
+        {
+            double sensorXCoordinate = sensor.RelativeLocation;
+            if (sensorXCoordinate < 0)
+            {
+                return sensorXCoordinate + offset;
+            }
+
+            return sensorXCoordinate;
+        }
     }
 }
\ No newline at end of file
Index: DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/Deltares.DamEngine.Calculators.Tests.csproj
===================================================================
diff -u -r3078 -r3339
--- DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/Deltares.DamEngine.Calculators.Tests.csproj	(.../Deltares.DamEngine.Calculators.Tests.csproj)	(revision 3078)
+++ DamEngine/trunk/src/Deltares.DamEngine.Calculators.Tests/Deltares.DamEngine.Calculators.Tests.csproj	(.../Deltares.DamEngine.Calculators.Tests.csproj)	(revision 3339)
@@ -87,6 +87,7 @@
     <Compile Include="KernelWrappers\DamPipingSellmeijer4Forces\DamPipingSellmeijer4ForcesKernelWrapperTests.cs" />
     <Compile Include="KernelWrappers\DamPipingSellmeijerVnk\DamPipingSellmeijerVnkKernelWrapperTests.cs" />
     <Compile Include="PlLinesCreator\PlLinesCreatorTest.cs" />
+    <Compile Include="PlLinesCreator\SensorPlLineCreatorBaseTest.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Sensors\SensorLocationTests.cs" />
     <Compile Include="Sensors\SensorPLLineCreatorTest.cs" />