Index: src/Deltares.DSoilModel.Data.Tests/DSoilModelProjectTest.cs
===================================================================
diff -u -r499 -r536
--- src/Deltares.DSoilModel.Data.Tests/DSoilModelProjectTest.cs	(.../DSoilModelProjectTest.cs)	(revision 499)
+++ src/Deltares.DSoilModel.Data.Tests/DSoilModelProjectTest.cs	(.../DSoilModelProjectTest.cs)	(revision 536)
@@ -43,10 +43,11 @@
             GeographicHelper.Instance = geographicHelper as GeographicHelper;
         }
 
-        [TestCase("Boring_RDNAP.gef", true)]
-        [TestCase("Boring_UserXYID.gef", false)]
-        [TestCase("Boring_UserZID.gef", false)]
-        public void TestBoringImportRequiresRdNap(string fileName, bool result)
+        [TestCase("Boring_RDNAP.gef", true, false)]
+        [TestCase("Boring_RDNAPParis.gef", true, true)]
+        [TestCase("Boring_UserXYID.gef", false, false)]
+        [TestCase("Boring_UserZID.gef", false, false)]
+        public void TestBoringImportRequiresRdNap(string fileName, bool result, bool invalid)
         {
             var filePath = Path.Combine(GetTestFilesPath(), "GEF", fileName);
             Assert.IsTrue(File.Exists(filePath));
@@ -58,12 +59,22 @@
 
             Assert.AreEqual(result, project.Borings.Count > 0);
             Assert.AreNotEqual(result, LogManager.Messages.Any(m => m.MessageType == LogMessageType.Error));
+
+            // invalid X,Y coordinates, gives warning and X,Y of imported boring set to 0,0
+            if (invalid)
+            {
+                Assert.AreEqual(result, LogManager.Messages.Any(m => m.MessageType == LogMessageType.Warning));
+                Assert.AreEqual(1, project.Borings.Count);
+                Assert.AreEqual(0, project.Borings[0].X);
+                Assert.AreEqual(0, project.Borings[0].X);
+            }
         }
 
-        [TestCase("CPT_RDNAP.gef", true)]
-        [TestCase("CPT_UserXYID.gef", false), Category("Work_In_Progress")]   // TODO: fix issue DSB-625 
-        [TestCase("CPT_UserZID.gef", false)]
-        public void TestCptImportRequiresRdNap(string fileName, bool result)
+        [TestCase("CPT_RDNAP.gef", true, false)]
+        [TestCase("CPT_RDNAPParis.gef", true, true)]
+        [TestCase("CPT_UserXYID.gef", false, false), Category("Work_In_Progress")]   // TODO: fix issue DSB-625 
+        [TestCase("CPT_UserZID.gef", false, false)]
+        public void TestCptImportRequiresRdNap(string fileName, bool result, bool invalid)
         {
             var filePath = Path.Combine(GetTestFilesPath(), "GEF", fileName);
             Assert.IsTrue(File.Exists(filePath));
@@ -75,6 +86,15 @@
 
             Assert.AreEqual(result, project.CPTs.Count > 0);
             Assert.AreNotEqual(result, LogManager.Messages.Any(m => m.MessageType == LogMessageType.Error));
+
+            // invalid X,Y coordinates, gives warning and X,Y of imported CPT set to 0,0
+            if (invalid)
+            {
+                Assert.AreEqual(result, LogManager.Messages.Any(m => m.MessageType == LogMessageType.Warning));
+                Assert.AreEqual(1, project.CPTs.Count);
+                Assert.AreEqual(0, project.CPTs[0].X);
+                Assert.AreEqual(0, project.CPTs[0].X);
+            }
         }
 
         [Test]
@@ -847,3 +867,4 @@
         }
     }
 }
+
Index: src/Deltares.DSoilModel.Data/DSoilModelProject.cs
===================================================================
diff -u -r499 -r536
--- src/Deltares.DSoilModel.Data/DSoilModelProject.cs	(.../DSoilModelProject.cs)	(revision 499)
+++ src/Deltares.DSoilModel.Data/DSoilModelProject.cs	(.../DSoilModelProject.cs)	(revision 536)
@@ -513,6 +513,15 @@
                     LogManager.Add(new LogMessage(LogMessageType.Error, null, msg));
                     return false;
                 }
+
+                if (!IsValidRdCoordinate(conePenetrationTestData.X, conePenetrationTestData.Y))
+                {
+                    var msg = String.Format(LocalizationManager.GetTranslatedText(this, "gefInvalidRdCoordinates"), fileName, conePenetrationTestData.X, conePenetrationTestData.Y);
+                    LogManager.Add(new LogMessage(LogMessageType.Warning, null, msg));
+                    conePenetrationTestData.X = 0;
+                    conePenetrationTestData.Y = 0;
+                }
+
                 UniqueNameProvider.ProvideUniqueName(cpts, conePenetrationTestData);
                 cpts.Add(conePenetrationTestData);
                 return true;
@@ -530,7 +539,6 @@
             if (fileName.EndsWith(".gef"))
             {
                 var gefBoringImporter = new GefBoringFileImporter();
-                //gefBoringImporter.Soils = soils;
                 gefBoringImporter.FillFromGefFile(fileName, soils);
                 boring = gefBoringImporter.Boring;
             }
@@ -543,6 +551,14 @@
                     return false;
                 }
 
+                if (!IsValidRdCoordinate(boring.X, boring.Y))
+                {
+                    var msg = String.Format(LocalizationManager.GetTranslatedText(this, "gefInvalidRdCoordinates"), fileName, boring.X, boring.Y);
+                    LogManager.Add(new LogMessage(LogMessageType.Warning, null, msg));
+                    boring.X = 0;
+                    boring.Y = 0;
+                }
+
                 // Ensure unique name
                 UniqueNameProvider.ProvideUniqueName(borings, boring);
                 borings.Add(boring);
@@ -1303,5 +1319,27 @@
                 soil.UsePop = false;
             }
         }
+
+        /// <summary>
+        /// Determines whether provided x,y coordinates are valid RD coordinates (Rijks Driehoekstelsel).
+        /// </summary>
+        /// <param name="x">The x coordinate.</param>
+        /// <param name="y">The y coordinate.</param>
+        /// <returns>
+        ///   <c>true</c> if [is valid rd coordinate] [the specified x]; otherwise, <c>false</c>.
+        /// </returns>
+        private bool IsValidRdCoordinate(double x, double y)
+        {
+            // valid coordinate range taken from wikipedia: https://nl.wikipedia.org/wiki/Rijksdriehoeksco%C3%B6rdinaten#Geldigheidsgebied
+            const double xRdMin = -7000;
+            const double xRdMax = +300;
+            const double yRdMin = 289000;
+            const double yRdMax = 629000;
+
+            return (x >= xRdMin && x <= xRdMax && y >= yRdMin && y <= yRdMax);
+        }
+
+
+
     }
 }
\ No newline at end of file
Index: src/Deltares.DSoilModel.Data/Translations.xml
===================================================================
diff -u -r499 -r536
--- src/Deltares.DSoilModel.Data/Translations.xml	(.../Translations.xml)	(revision 499)
+++ src/Deltares.DSoilModel.Data/Translations.xml	(.../Translations.xml)	(revision 536)
@@ -28,6 +28,7 @@
   <Translation ID="csvHeaderInvalidColumns" en-US="One or more column names unknown" nl-NL="Een of meer kolomnamen onbekend" />
   <Translation ID="csvHeaderMissingColumns" en-US="One or more required column names missing" nl-NL="Een of meer verplichte kolomnamen ontbreken" />
   <Translation ID="gefCoordinateSystemError" en-US="The GEF file {0} could not be imported, invalid coordinate system (only RD-NAP is supported" nl-NL="Het GEF bestand {0} kan niet worden geimporteerd, ongeldig coordinaten systeem (alleen RD-NAP wordt ondersteund)" />
+  <Translation ID="gefInvalidRdCoordinates" en-US="The GEF file {0} contains X, Y coordinates ({1}, {2}) that lie outside the valid range for Dutch RD (Rijks Driehoekstelsel) coordinates !" nl-NL="Het GEF bestand {0} bevat X, Y coordinaten ({1}, {2}) die buiten het geldige bereik liggen van RD (Rijks Driehoekstelsel) coordinaten !" />
   <Translation ID="SoilNameNotUnique" en-US="The name of this soil material is not unique - not imported" nl-NL="De naam van het ondergrondmateriaal is niet uniek - niet geimporteerd" />
   <Translation ID="SoilSegmentRefused" en-US="Segment {0} is refused as one or more profiles are missing." nl-NL="Segment {0} is geweigerd omdat deze een of meer profielen mist." />
   <Translation ID="MaximumTopLevel" en-US="Maximum value toplevel" nl-NL="Maximale waarde bovenkant" />