diff --git a/src/osgPlugins/ive/CMakeLists.txt b/src/osgPlugins/ive/CMakeLists.txt
index d49320c19..04ab4dfff 100644
--- a/src/osgPlugins/ive/CMakeLists.txt
+++ b/src/osgPlugins/ive/CMakeLists.txt
@@ -2,198 +2,210 @@
 
 
 SET(TARGET_SRC
-AlphaFunc.cpp
-AnimationPath.cpp
-AnimationPathCallback.cpp
-AutoTransform.cpp
-AzimElevationSector.cpp
-AzimSector.cpp
-Billboard.cpp
-BlendColor.cpp
-BlendFunc.cpp
-BlinkSequence.cpp
-Camera.cpp
-CameraView.cpp
-ClipNode.cpp
-ClipPlane.cpp
-ClusterCullingCallback.cpp
-ColorMask.cpp
-ConeSector.cpp
-ConvexPlanarOccluder.cpp
-ConvexPlanarPolygon.cpp
-CoordinateSystemNode.cpp
-CullFace.cpp
-DOFTransform.cpp
-DataInputStream.cpp
-DataOutputStream.cpp
-Depth.cpp
-DirectionalSector.cpp
-DrawArrayLengths.cpp
-DrawArrays.cpp
-DrawElementsUByte.cpp
-DrawElementsUInt.cpp
-DrawElementsUShort.cpp
-Drawable.cpp
-ElevationSector.cpp
-EllipsoidModel.cpp
-Exception.cpp
-FragmentProgram.cpp
-FrontFace.cpp
-Geode.cpp
-Geometry.cpp
-Group.cpp
-Image.cpp
-Impostor.cpp
-LOD.cpp
-Light.cpp
-LightModel.cpp
-LightPoint.cpp
-LightPointNode.cpp
-LightSource.cpp
-LineWidth.cpp
-Material.cpp
-MatrixTransform.cpp
-MultiSwitch.cpp
-MultiTextureControl.cpp
-Multisample.cpp
-Node.cpp
-Object.cpp
-OccluderNode.cpp
-OcclusionQueryNode.cpp
-PagedLOD.cpp
-Point.cpp
-PointSprite.cpp
-PolygonMode.cpp
-PolygonOffset.cpp
-PositionAttitudeTransform.cpp
-PrimitiveSet.cpp
-Program.cpp
-ProxyNode.cpp
-ReaderWriterIVE.cpp
-Scissor.cpp
-Sequence.cpp
-ShadeModel.cpp
-Shader.cpp
-Shape.cpp
-ShapeDrawable.cpp
-StateSet.cpp
-Stencil.cpp
-Switch.cpp
-TexEnv.cpp
-TexEnvCombine.cpp
-TexGen.cpp
-TexGenNode.cpp
-TexMat.cpp
-Text.cpp
-Texture.cpp
-Texture1D.cpp
-Texture2D.cpp
-Texture3D.cpp
-TextureCubeMap.cpp
-TextureRectangle.cpp
-Transform.cpp
-Uniform.cpp
-VertexProgram.cpp
-Viewport.cpp
-VisibilityGroup.cpp
+    AlphaFunc.cpp
+    AnimationPath.cpp
+    AnimationPathCallback.cpp
+    AutoTransform.cpp
+    AzimElevationSector.cpp
+    AzimSector.cpp
+    Billboard.cpp
+    BlendColor.cpp
+    BlendFunc.cpp
+    BlinkSequence.cpp
+    Camera.cpp
+    CameraView.cpp
+    ClipNode.cpp
+    ClipPlane.cpp
+    ClusterCullingCallback.cpp
+    ColorMask.cpp
+    ConeSector.cpp
+    ConvexPlanarOccluder.cpp
+    ConvexPlanarPolygon.cpp
+    CoordinateSystemNode.cpp
+    CullFace.cpp
+    DOFTransform.cpp
+    DataInputStream.cpp
+    DataOutputStream.cpp
+    Depth.cpp
+    DirectionalSector.cpp
+    DrawArrayLengths.cpp
+    DrawArrays.cpp
+    DrawElementsUByte.cpp
+    DrawElementsUInt.cpp
+    DrawElementsUShort.cpp
+    Drawable.cpp
+    ElevationSector.cpp
+    EllipsoidModel.cpp
+    Exception.cpp
+    FragmentProgram.cpp
+    FrontFace.cpp
+    Geode.cpp
+    Geometry.cpp
+    Group.cpp
+    Image.cpp
+    Impostor.cpp
+    LOD.cpp
+    Light.cpp
+    LightModel.cpp
+    LightPoint.cpp
+    LightPointNode.cpp
+    LightSource.cpp
+    LineWidth.cpp
+    Material.cpp
+    MatrixTransform.cpp
+    MultiSwitch.cpp
+    MultiTextureControl.cpp
+    Multisample.cpp
+    Node.cpp
+    Object.cpp
+    OccluderNode.cpp
+    OcclusionQueryNode.cpp
+    PagedLOD.cpp
+    Point.cpp
+    PointSprite.cpp
+    PolygonMode.cpp
+    PolygonOffset.cpp
+    PositionAttitudeTransform.cpp
+    PrimitiveSet.cpp
+    Program.cpp
+    ProxyNode.cpp
+    ReaderWriterIVE.cpp
+    Scissor.cpp
+    Sequence.cpp
+    ShadeModel.cpp
+    Shader.cpp
+    Shape.cpp
+    ShapeDrawable.cpp
+    StateSet.cpp
+    Stencil.cpp
+    Switch.cpp
+    TexEnv.cpp
+    TexEnvCombine.cpp
+    TexGen.cpp
+    TexGenNode.cpp
+    TexMat.cpp
+    Text.cpp
+    Texture.cpp
+    Texture1D.cpp
+    Texture2D.cpp
+    Texture3D.cpp
+    TextureCubeMap.cpp
+    TextureRectangle.cpp
+    Terrain.cpp
+    Locator.cpp
+    Layer.cpp
+    HeightFieldLayer.cpp
+    ImageLayer.cpp
+    CompositeLayer.cpp
+    Transform.cpp
+    Uniform.cpp
+    VertexProgram.cpp
+    Viewport.cpp
+    VisibilityGroup.cpp
 )
 SET(TARGET_H
-AlphaFunc.h
-AnimationPath.h
-AnimationPathCallback.h
-AutoTransform.h
-AzimElevationSector.h
-AzimSector.h
-Billboard.h
-BlendColor.h
-BlendFunc.h
-BlinkSequence.h
-Camera.h
-CameraView.h
-ClipNode.h
-ClipPlane.h
-ClusterCullingCallback.h
-ColorMask.h
-ConeSector.h
-ConvexPlanarOccluder.h
-ConvexPlanarPolygon.h
-CoordinateSystemNode.h
-CullFace.h
-DOFTransform.h
-DataInputStream.h
-DataOutputStream.h
-DataTypeSize.h
-Depth.h
-DirectionalSector.h
-DrawArrayLengths.h
-DrawArrays.h
-DrawElementsUByte.h
-DrawElementsUInt.h
-DrawElementsUShort.h
-Drawable.h
-ElevationSector.h
-EllipsoidModel.h
-Exception.h
-FragmentProgram.h
-FrontFace.h
-Geode.h
-Geometry.h
-Group.h
-Image.h
-Impostor.h
-IveVersion.h
-LOD.h
-Light.h
-LightModel.h
-LightPoint.h
-LightPointNode.h
-LightSource.h
-LineWidth.h
-Material.h
-MatrixTransform.h
-MultiSwitch.h
-MultiTextureControl.h
-Node.h
-Object.h
-OccluderNode.h
-OcclusionQueryNode.h
-PagedLOD.h
-Point.h
-PointSprite.h
-PolygonMode.h
-PolygonOffset.h
-PositionAttitudeTransform.h
-PrimitiveSet.h
-Program.h
-ProxyNode.h
-ReadWrite.h
-Scissor.h
-Sequence.h
-ShadeModel.h
-Shader.h
-Shape.h
-ShapeDrawable.h
-StateSet.h
-Stencil.h
-Switch.h
-TexEnv.h
-TexEnvCombine.h
-TexGen.h
-TexGenNode.h
-TexMat.h
-Text.h
-Texture.h
-Texture1D.h
-Texture2D.h
-Texture3D.h
-TextureCubeMap.h
-TextureRectangle.h
-Transform.h
-Uniform.h
-VertexProgram.h
-Viewport.h
-VisibilityGroup.h
+    AlphaFunc.h
+    AnimationPath.h
+    AnimationPathCallback.h
+    AutoTransform.h
+    AzimElevationSector.h
+    AzimSector.h
+    Billboard.h
+    BlendColor.h
+    BlendFunc.h
+    BlinkSequence.h
+    Camera.h
+    CameraView.h
+    ClipNode.h
+    ClipPlane.h
+    ClusterCullingCallback.h
+    ColorMask.h
+    ConeSector.h
+    ConvexPlanarOccluder.h
+    ConvexPlanarPolygon.h
+    CoordinateSystemNode.h
+    CullFace.h
+    DOFTransform.h
+    DataInputStream.h
+    DataOutputStream.h
+    DataTypeSize.h
+    Depth.h
+    DirectionalSector.h
+    DrawArrayLengths.h
+    DrawArrays.h
+    DrawElementsUByte.h
+    DrawElementsUInt.h
+    DrawElementsUShort.h
+    Drawable.h
+    ElevationSector.h
+    EllipsoidModel.h
+    Exception.h
+    FragmentProgram.h
+    FrontFace.h
+    Geode.h
+    Geometry.h
+    Group.h
+    Image.h
+    Impostor.h
+    IveVersion.h
+    LOD.h
+    Light.h
+    LightModel.h
+    LightPoint.h
+    LightPointNode.h
+    LightSource.h
+    LineWidth.h
+    Material.h
+    MatrixTransform.h
+    MultiSwitch.h
+    MultiTextureControl.h
+    Node.h
+    Object.h
+    OccluderNode.h
+    OcclusionQueryNode.h
+    PagedLOD.h
+    Point.h
+    PointSprite.h
+    PolygonMode.h
+    PolygonOffset.h
+    PositionAttitudeTransform.h
+    PrimitiveSet.h
+    Program.h
+    ProxyNode.h
+    ReadWrite.h
+    Scissor.h
+    Sequence.h
+    ShadeModel.h
+    Shader.h
+    Shape.h
+    ShapeDrawable.h
+    StateSet.h
+    Stencil.h
+    Switch.h
+    TexEnv.h
+    TexEnvCombine.h
+    TexGen.h
+    TexGenNode.h
+    TexMat.h
+    Text.h
+    Texture.h
+    Texture1D.h
+    Texture2D.h
+    Texture3D.h
+    TextureCubeMap.h
+    TextureRectangle.h
+    Terrain.h
+    Transform.h
+    Locator.h
+    Layer.h
+    HeightFieldLayer.h
+    ImageLayer.h
+    CompositeLayer.h
+    Uniform.h
+    VertexProgram.h
+    Viewport.h
+    VisibilityGroup.h
 )
-SET(TARGET_ADDED_LIBRARIES osgSim osgFX osgText )
+SET(TARGET_ADDED_LIBRARIES osgSim osgFX osgText osgTerrain)
 #### end var setup  ###
 SETUP_PLUGIN(ive)
diff --git a/src/osgPlugins/ive/CompositeLayer.cpp b/src/osgPlugins/ive/CompositeLayer.cpp
new file mode 100644
index 000000000..d0fa0b3c1
--- /dev/null
+++ b/src/osgPlugins/ive/CompositeLayer.cpp
@@ -0,0 +1,82 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2008 Robert Osfield 
+ *
+ * This library is open source and may be redistributed and/or modified under  
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ * 
+ * This library 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 
+ * OpenSceneGraph Public License for more details.
+*/
+
+#include "Exception.h"
+#include "CompositeLayer.h"
+#include "Layer.h"
+
+using namespace ive;
+
+void CompositeLayer::write(DataOutputStream* out)
+{
+    // Write Layer's identification.
+    out->writeInt(IVECOMPOSITELAYER);
+
+    // If the osg class is inherited by any other class we should also write this to file.
+    osgTerrain::Layer*  layer = dynamic_cast<osgTerrain::Layer*>(this);
+    if  (layer)
+        ((ive::Layer*)(layer))->write(out);
+    else
+        throw Exception("CompositeLayer::write(): Could not cast this osgLayer::CompositeLayer to an osgTerrain::Layer.");
+
+    LayerHelper helper;
+
+    out->writeUInt(getNumLayers());
+    for(unsigned int i=0; i<getNumLayers(); ++i)
+    {
+        if(getLayer(i))
+        {
+            out->writeBool(true);
+            helper.writeLayer(out, getLayer(i));
+        }
+        else
+        {
+            out->writeBool(false);
+            out->writeString(getFileName(i));
+        }
+    }
+}
+
+void CompositeLayer::read(DataInputStream* in)
+{
+    // Peek on Layer's identification.
+    int id = in->peekInt();
+    if (id != IVECOMPOSITELAYER)
+        throw Exception("CompositeLayer::read(): Expected CompositeLayer identification.");
+    
+    // Read Layer's identification.
+    id = in->readInt();
+
+    // If the osg class is inherited by any other class we should also read this from file.
+    osgTerrain::Layer*  layer = dynamic_cast<osgTerrain::Layer*>(this);
+    if (layer)
+        ((ive::Layer*)(layer))->read(in);
+    else
+        throw Exception("CompositeLayer::read(): Could not cast this osgLayer::Layer to an osg::Group.");
+
+    LayerHelper helper;
+
+    unsigned int numLayers = in->readUInt();
+    for(unsigned int i=0; i<numLayers; ++i)
+    {
+        bool readInlineLayer = in->readBool();
+        if (readInlineLayer)
+        {
+            addLayer(helper.readLayer(in));
+        }
+        else
+        {
+            addLayer(in->readString());
+        }
+    }
+}
diff --git a/src/osgPlugins/ive/CompositeLayer.h b/src/osgPlugins/ive/CompositeLayer.h
new file mode 100644
index 000000000..de82457e7
--- /dev/null
+++ b/src/osgPlugins/ive/CompositeLayer.h
@@ -0,0 +1,19 @@
+#ifndef IVE_COMPOSITELAYER
+#define IVE_COMPOSITELAYER 1
+
+#include <osgTerrain/Terrain>
+#include "ReadWrite.h"
+
+namespace ive
+{
+
+class CompositeLayer : public osgTerrain::CompositeLayer, public ReadWrite
+{
+public:
+	void write(DataOutputStream* out);
+	void read(DataInputStream* in);
+};
+
+}
+
+#endif
diff --git a/src/osgPlugins/ive/CoordinateSystemNode.cpp b/src/osgPlugins/ive/CoordinateSystemNode.cpp
index aee16adb4..514e4ad58 100644
--- a/src/osgPlugins/ive/CoordinateSystemNode.cpp
+++ b/src/osgPlugins/ive/CoordinateSystemNode.cpp
@@ -65,8 +65,8 @@ void CoordinateSystemNode::read(DataInputStream* in){
         // Read coord string
         setCoordinateSystem( in->readString());
 
-        bool readEllopsoidModel = in->readBool();
-        if (readEllopsoidModel)
+        bool readEllipsoidModel = in->readBool();
+        if (readEllipsoidModel)
         {
             osg::EllipsoidModel* em = new osg::EllipsoidModel();
             ((ive::EllipsoidModel*)(em))->read(in);
diff --git a/src/osgPlugins/ive/DataInputStream.cpp b/src/osgPlugins/ive/DataInputStream.cpp
index e9d4f64d1..fd2a5ebc2 100644
--- a/src/osgPlugins/ive/DataInputStream.cpp
+++ b/src/osgPlugins/ive/DataInputStream.cpp
@@ -89,6 +89,8 @@
 
 #include "Text.h"
 
+#include "Terrain.h"
+
 #include <osg/Endian>
 #include <osg/Notify>
 #include <osg/io_utils>
@@ -1451,6 +1453,10 @@ osg::Node* DataInputStream::readNode()
         node = new osgFX::MultiTextureControl();
         ((ive::MultiTextureControl*)(node))->read(this);
     }
+    else if(nodeTypeID== IVETERRAIN){
+        node = new osgTerrain::Terrain();
+        ((ive::Terrain*)(node))->read(this);
+    }
     else{
         throw Exception("Unknown node identification in DataInputStream::readNode()");
     }
diff --git a/src/osgPlugins/ive/DataOutputStream.cpp b/src/osgPlugins/ive/DataOutputStream.cpp
index 95c1a6000..32ab98d1d 100644
--- a/src/osgPlugins/ive/DataOutputStream.cpp
+++ b/src/osgPlugins/ive/DataOutputStream.cpp
@@ -90,6 +90,8 @@
 
 #include "Text.h"
 
+#include "Terrain.h"
+
 #include <osg/Notify>
 #include <osg/io_utils>
 #include <osgDB/FileUtils>
@@ -978,7 +980,7 @@ void DataOutputStream::writeNode(const osg::Node* node)
     else
     {
         // id doesn't exist so create a new ID and
-        // register the stateset.
+        // register the node.
 
         int id = _nodeMap.size();
         _nodeMap[node] = id;
@@ -1054,6 +1056,9 @@ void DataOutputStream::writeNode(const osg::Node* node)
         else if(dynamic_cast<const osgFX::MultiTextureControl*>(node)){
             ((ive::MultiTextureControl*)(node))->write(this);
         }
+        else if(dynamic_cast<const osgTerrain::Terrain*>(node)){
+            ((ive::Terrain*)(node))->write(this);
+        }
         else if(dynamic_cast<const osg::Group*>(node)){
             ((ive::Group*)(node))->write(this);
         }
diff --git a/src/osgPlugins/ive/ImageLayer.cpp b/src/osgPlugins/ive/ImageLayer.cpp
new file mode 100644
index 000000000..306c7e962
--- /dev/null
+++ b/src/osgPlugins/ive/ImageLayer.cpp
@@ -0,0 +1,86 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2008 Robert Osfield 
+ *
+ * This library is open source and may be redistributed and/or modified under  
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ * 
+ * This library 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 
+ * OpenSceneGraph Public License for more details.
+*/
+
+#include "Exception.h"
+#include "ImageLayer.h"
+#include "Layer.h"
+
+#include <osgDB/ReadFile>
+
+using namespace ive;
+
+void ImageLayer::write(DataOutputStream* out)
+{
+    // Write Layer's identification.
+    out->writeInt(IVEIMAGELAYER);
+
+    // If the osg class is inherited by any other class we should also write this to file.
+    osgTerrain::Layer*  layer = dynamic_cast<osgTerrain::Layer*>(this);
+    if  (layer)
+        ((ive::Layer*)(layer))->write(out);
+    else
+        throw Exception("ImageLayer::write(): Could not cast this osgLayer::ImageLayer to an osgTerrain::Layer.");
+
+
+    if (getFileName().empty() && getImage())
+    {
+        // using inline image
+        out->writeBool(true);  
+        out->writeChar(out->getIncludeImageMode());
+        out->writeImage(out->getIncludeImageMode(),getImage());
+    }
+    else
+    {
+        // using external image file
+        out->writeBool(false);        
+        out->writeString(getFileName());
+    }
+
+}
+
+void ImageLayer::read(DataInputStream* in)
+{
+    // Peek on Layer's identification.
+    int id = in->peekInt();
+    if (id != IVEIMAGELAYER)
+        throw Exception("ImageLayer::read(): Expected ImageLayer identification.");
+    
+    // Read Layer's identification.
+    id = in->readInt();
+
+    // If the osg class is inherited by any other class we should also read this from file.
+    osgTerrain::Layer*  layer = dynamic_cast<osgTerrain::Layer*>(this);
+    if (layer)
+        ((ive::Layer*)(layer))->read(in);
+    else
+        throw Exception("ImageLayer::read(): Could not cast this osgLayer::Layer to an osg::Group.");
+
+
+    bool useInlineImage = in->readBool();
+    
+    if (useInlineImage)
+    {
+        // Should we read image data from stream
+        IncludeImageMode includeImg = (IncludeImageMode)in->readChar();
+
+        setImage(in->readImage(includeImg));
+    }
+    else
+    {
+        std::string filename = in->readString();
+        setFileName(filename);
+        
+        setImage(osgDB::readImageFile(filename,in->getOptions()));
+    }
+
+}
diff --git a/src/osgPlugins/ive/ImageLayer.h b/src/osgPlugins/ive/ImageLayer.h
new file mode 100644
index 000000000..f8f11b88e
--- /dev/null
+++ b/src/osgPlugins/ive/ImageLayer.h
@@ -0,0 +1,32 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2008 Robert Osfield 
+ *
+ * This library is open source and may be redistributed and/or modified under  
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ * 
+ * This library 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 
+ * OpenSceneGraph Public License for more details.
+*/
+
+#ifndef IVE_IMAGELAYER
+#define IVE_IMAGELAYER 1
+
+#include <osgTerrain/Terrain>
+#include "ReadWrite.h"
+
+namespace ive
+{
+
+class ImageLayer : public osgTerrain::ImageLayer, public ReadWrite
+{
+public:
+	void write(DataOutputStream* out);
+	void read(DataInputStream* in);
+};
+
+}
+
+#endif
diff --git a/src/osgPlugins/ive/Layer.cpp b/src/osgPlugins/ive/Layer.cpp
new file mode 100644
index 000000000..0d6bda3d2
--- /dev/null
+++ b/src/osgPlugins/ive/Layer.cpp
@@ -0,0 +1,181 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2008 Robert Osfield 
+ *
+ * This library is open source and may be redistributed and/or modified under  
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ * 
+ * This library 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 
+ * OpenSceneGraph Public License for more details.
+*/
+
+#include "Exception.h"
+#include "Layer.h"
+#include "Locator.h"
+#include "Object.h"
+#include "Locator.h"
+#include "ImageLayer.h"
+#include "HeightFieldLayer.h"
+#include "CompositeLayer.h"
+
+#include <osgDB/ReadFile>
+
+using namespace ive;
+
+void Layer::write(DataOutputStream* out)
+{
+    // Write Layer's identification.
+    out->writeInt(IVELAYER);
+
+    // If the osg class is inherited by any other class we should also write this to file.
+    osg::Object*  object = dynamic_cast<osg::Object*>(this);
+    if (object)
+        ((ive::Object*)(object))->write(out);
+    else
+        throw Exception("Layer::write(): Could not cast this osgLayer::Layer to an osg::Object.");
+
+    LayerHelper helper;
+    helper.writeLocator(out, getLocator());
+
+    out->writeUInt(getMinLevel());
+    out->writeUInt(getMaxLevel());
+}
+
+void Layer::read(DataInputStream* in)
+{
+    // Peek on Layer's identification.
+    int id = in->peekInt();
+    if (id != IVELAYER)
+        throw Exception("Layer::read(): Expected Layer identification.");
+    
+    // Read Layer's identification.
+    id = in->readInt();
+
+    // If the osg class is inherited by any other class we should also read this from file.
+    osg::Object*  object = dynamic_cast<osg::Object*>(this);
+    if(object)
+        ((ive::Object*)(object))->read(in);
+    else
+        throw Exception("Layer::read(): Could not cast this osgLayer::Layer to an osg::Group.");
+
+    LayerHelper helper;
+    setLocator(helper.readLocator(in));
+
+    setMinLevel(in->readUInt());
+    setMaxLevel(in->readUInt());
+
+}
+
+void LayerHelper::writeLayer(DataOutputStream* out, osgTerrain::Layer* layer)
+{
+    if (layer) 
+    {
+        out->writeBool(true);
+
+        if (dynamic_cast<osgTerrain::HeightFieldLayer*>(layer))
+        {
+            ((ive::HeightFieldLayer*)(layer))->write(out);
+        }
+        else if (dynamic_cast<osgTerrain::ImageLayer*>(layer))
+        {
+            ((ive::ImageLayer*)(layer))->write(out);
+        }
+        else if (dynamic_cast<osgTerrain::CompositeLayer*>(layer))
+        {
+            ((ive::CompositeLayer*)(layer))->write(out);
+        }
+        else if (dynamic_cast<osgTerrain::ProxyLayer*>(layer))
+        {
+            out->writeInt(IVEPROXYLAYER);
+            out->writeString(layer->getFileName());
+
+            osgTerrain::Locator* locator = layer->getLocator();
+            bool writeOutLocator = locator && !locator->getDefinedInFile();
+            writeLocator(out, writeOutLocator ? locator : 0 );
+
+            out->writeUInt(layer->getMinLevel());
+            out->writeUInt(layer->getMaxLevel());
+        }
+
+    }
+    else
+    {
+        out->writeBool(false);
+    }
+}
+
+osgTerrain::Layer* LayerHelper::readLayer(DataInputStream* in)
+{
+    bool layerExist = in->readBool();
+    if (!layerExist) return 0;
+
+    int id = in->peekInt();
+    if (id==IVEHEIGHTFIELDLAYER)
+    {
+        osgTerrain::HeightFieldLayer* layer = new osgTerrain::HeightFieldLayer;
+        ((ive::HeightFieldLayer*)(layer))->read(in);
+        return layer;
+    }
+    else if (id==IVEIMAGELAYER)
+    {
+        osgTerrain::ImageLayer* layer = new osgTerrain::ImageLayer;
+        ((ive::ImageLayer*)(layer))->read(in);
+        return layer;
+    }
+    else if (id==IVECOMPOSITELAYER)
+    {
+        osgTerrain::CompositeLayer* layer = new osgTerrain::CompositeLayer;
+        ((ive::CompositeLayer*)(layer))->read(in);
+        return layer;
+    }
+    else if (id==IVEPROXYLAYER)
+    {
+        std::string filename = in->readString();
+        osg::ref_ptr<osg::Object> object = osgDB::readObjectFile(filename+".gdal");
+        osgTerrain::ProxyLayer* proxyLayer = dynamic_cast<osgTerrain::ProxyLayer*>(object.get());
+        
+        osg::ref_ptr<osgTerrain::Locator> locator = readLocator(in);
+        unsigned int minLevel = in->readUInt();
+        unsigned int maxLevel = in->readUInt();
+        
+        if (proxyLayer)
+        {
+            if (locator.valid()) proxyLayer->setLocator(locator.get());
+            
+            proxyLayer->setMinLevel(minLevel);
+            proxyLayer->setMaxLevel(maxLevel);
+        }
+        
+        return proxyLayer;
+    }
+    
+    return new osgTerrain::ImageLayer;
+}
+
+void LayerHelper::writeLocator(DataOutputStream* out, osgTerrain::Locator* locator)
+{
+    if (locator) 
+    {
+        out->writeBool(true);
+        
+        ((ive::Locator*)(locator))->write(out);
+    }
+    else
+    {
+        out->writeBool(false);
+    }
+}
+
+osgTerrain::Locator* LayerHelper::readLocator(DataInputStream* in)
+{
+    bool locatorExist = in->readBool();
+    if (!locatorExist) return 0;
+    
+    osgTerrain::Locator* locator = new osgTerrain::Locator;
+    
+    ((ive::Locator*)(locator))->read(in);
+    
+    return locator;
+}
diff --git a/src/osgPlugins/ive/Layer.h b/src/osgPlugins/ive/Layer.h
new file mode 100644
index 000000000..b1e8cadab
--- /dev/null
+++ b/src/osgPlugins/ive/Layer.h
@@ -0,0 +1,45 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2008 Robert Osfield 
+ *
+ * This library is open source and may be redistributed and/or modified under  
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ * 
+ * This library 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 
+ * OpenSceneGraph Public License for more details.
+*/
+
+#ifndef IVE_LAYER
+#define IVE_LAYER 1
+
+#include <osgTerrain/Terrain>
+#include "ReadWrite.h"
+
+namespace ive
+{
+
+class LayerHelper
+{
+    public:
+
+        LayerHelper() {}
+    
+        void writeLayer(DataOutputStream* out, osgTerrain::Layer* layer);
+        osgTerrain::Layer* readLayer(DataInputStream* in);
+
+        void writeLocator(DataOutputStream* out, osgTerrain::Locator* locator);
+        osgTerrain::Locator* readLocator(DataInputStream* in);
+};
+
+class Layer : public osgTerrain::Layer, public ReadWrite 
+{
+    public:
+	void write(DataOutputStream* out);
+	void read(DataInputStream* in);
+};
+
+}
+
+#endif
diff --git a/src/osgPlugins/ive/Locator.cpp b/src/osgPlugins/ive/Locator.cpp
new file mode 100644
index 000000000..2dbe0d629
--- /dev/null
+++ b/src/osgPlugins/ive/Locator.cpp
@@ -0,0 +1,84 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2008 Robert Osfield 
+ *
+ * This library is open source and may be redistributed and/or modified under  
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ * 
+ * This library 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 
+ * OpenSceneGraph Public License for more details.
+*/
+
+
+#include "Exception.h"
+#include "Locator.h"
+#include "Object.h"
+#include "EllipsoidModel.h"
+
+using namespace ive;
+
+void Locator::write(DataOutputStream* out)
+{
+    // Write Locator's identification.
+    out->writeInt(IVELOCATOR);
+
+    // If the osg class is inherited by any other class we should also write this to file.
+    osg::Object*  object = dynamic_cast<osg::Object*>(this);
+    if (object)
+        ((ive::Object*)(object))->write(out);
+    else
+        throw Exception("Layer::write(): Could not cast this osgLayer::Layer to an osg::Object.");
+        
+    out->writeInt(getCoordinateSystemType());
+    out->writeString(getFormat());
+    out->writeString(getCoordinateSystem());
+    
+    out->writeBool(getEllipsoidModel()!=0);
+    if(getEllipsoidModel())
+    {
+        ((ive::EllipsoidModel*)(getEllipsoidModel()))->write(out);
+    }
+    
+    out->writeBool(getDefinedInFile());
+    out->writeBool(getTransformScaledByResolution());
+    out->writeMatrixd(getTransform());
+}
+
+void Locator::read(DataInputStream* in)
+{
+    // Peek on Locator's identification.
+    int id = in->peekInt();
+    if(id != IVELOCATOR)
+    {
+        throw Exception("Locator::read(): Expected Locator identification.");
+    }
+    
+    // Read Locator's identification.
+    id = in->readInt();
+
+    // If the osg class is inherited by any other class we should also read this from file.
+    osg::Object*  object = dynamic_cast<osg::Object*>(this);
+    if(object)
+        ((ive::Object*)(object))->read(in);
+    else
+        throw Exception("Locator::read(): Could not cast this osgLocator::Locator to an osg::Group.");
+
+    setCoordinateSystemType(static_cast<osgTerrain::Locator::CoordinateSystemType>(in->readInt()));
+    setFormat(in->readString());
+    setCoordinateSystem(in->readString());
+    
+    bool readEllipsoidModel = in->readBool();
+    if (readEllipsoidModel)
+    {
+        osg::EllipsoidModel* em = new osg::EllipsoidModel();
+        ((ive::EllipsoidModel*)(em))->read(in);
+        setEllipsoidModel(em);
+    }
+    
+    setDefinedInFile(in->readBool());
+    setTransformScaledByResolution(in->readBool());
+    setTransform(in->readMatrixd());
+
+}
diff --git a/src/osgPlugins/ive/Locator.h b/src/osgPlugins/ive/Locator.h
new file mode 100644
index 000000000..d46be90e8
--- /dev/null
+++ b/src/osgPlugins/ive/Locator.h
@@ -0,0 +1,28 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2008 Robert Osfield 
+ *
+ * This library is open source and may be redistributed and/or modified under  
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ * 
+ * This library 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 
+ * OpenSceneGraph Public License for more details.
+*/
+
+#ifndef IVE_LOCATOR
+#define IVE_LOCATOR 1
+
+#include <osgTerrain/Locator>
+#include "ReadWrite.h"
+
+namespace ive{
+class Locator : public osgTerrain::Locator, public ReadWrite {
+public:
+	void write(DataOutputStream* out);
+	void read(DataInputStream* in);
+};
+}
+
+#endif
diff --git a/src/osgPlugins/ive/ReadWrite.h b/src/osgPlugins/ive/ReadWrite.h
index bab338b66..13c3976a3 100644
--- a/src/osgPlugins/ive/ReadWrite.h
+++ b/src/osgPlugins/ive/ReadWrite.h
@@ -120,6 +120,17 @@ namespace ive {
 #define IVEVISIBILITYGROUP              0x00100009
 #define IVEDIRECTIONALSECTOR            0x0010000A
 
+// osgTerrain classes
+#define IVETERRAIN                      0x00200001
+#define IVELOCATOR                      0x00200002
+#define IVELAYER                        0x00200003
+#define IVEIMAGELAYER                   0x00200004
+#define IVEHEIGHTFIELDLAYER             0x00200005
+#define IVECOMPOSITELAYER               0x00200006
+#define IVEPROXYLAYER                   0x00200007
+#define IVETERRAINTECHNIQUE             0x00200008
+#define IVEGEOMETRYTECHNIQUE            0x00200009
+
 // osgFX classes
 #define IVEMULTITEXTURECONTROL          0x01000001
 
diff --git a/src/osgPlugins/ive/Terrain.cpp b/src/osgPlugins/ive/Terrain.cpp
new file mode 100644
index 000000000..cb88f97bf
--- /dev/null
+++ b/src/osgPlugins/ive/Terrain.cpp
@@ -0,0 +1,109 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2008 Robert Osfield 
+ *
+ * This library is open source and may be redistributed and/or modified under  
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ * 
+ * This library 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 
+ * OpenSceneGraph Public License for more details.
+*/
+
+#include "Exception.h"
+#include "Terrain.h"
+#include "Group.h"
+#include "Layer.h"
+
+#include <osgTerrain/GeometryTechnique>
+
+using namespace ive;
+
+void Terrain::write(DataOutputStream* out)
+{
+    // Write Terrain's identification.
+    out->writeInt(IVETERRAIN);
+    // If the osg class is inherited by any other class we should also write this to file.
+    osg::Group*  group = dynamic_cast<osg::Group*>(this);
+    if(group)
+        ((ive::Group*)(group))->write(out);
+    else
+        throw Exception("Terrain::write(): Could not cast this osgTerrain::Terrain to an osg::Group.");
+
+    LayerHelper helper;
+
+    helper.writeLocator(out, getLocator());
+
+    helper.writeLayer(out, getElevationLayer());
+    
+    out->writeUInt(getNumColorLayers());
+    
+    for(unsigned int i=0; i<getNumColorLayers(); ++i)
+    {
+        helper.writeLayer(out, getColorLayer(i));
+    }
+    
+    writeTerrainTechnique(out, getTerrainTechnique());
+
+}
+
+void Terrain::read(DataInputStream* in)
+{
+    // Peek on Terrain's identification.
+    int id = in->peekInt();
+    if (id != IVETERRAIN) throw Exception("Terrain::read(): Expected Terrain identification.");
+
+    // Read Terrain's identification.
+    id = in->readInt();
+    // If the osg class is inherited by any other class we should also read this from file.
+    osg::Group*  group = dynamic_cast<osg::Group*>(this);
+    if(group)
+        ((ive::Group*)(group))->read(in);
+    else
+        throw Exception("Terrain::read(): Could not cast this osgTerrain::Terrain to an osg::Group.");
+
+    LayerHelper helper;
+
+    setLocator(helper.readLocator(in));
+
+    setElevationLayer(helper.readLayer(in));
+
+    unsigned int numColorLayers = in->readUInt();
+    for(unsigned int i=0; i<numColorLayers; ++i)
+    {
+        setColorLayer(i, helper.readLayer(in));
+    }
+    
+    setTerrainTechnique(readTerrainTechnique(in));
+
+}
+
+void Terrain::writeTerrainTechnique(DataOutputStream* out, osgTerrain::TerrainTechnique* technique)
+{
+    if (dynamic_cast<osgTerrain::GeometryTechnique*>(technique))
+    {
+        out->writeBool(true);
+        out->writeInt(IVEGEOMETRYTECHNIQUE);
+    }
+    else
+    {
+        out->writeBool(false);
+    }
+}
+
+osgTerrain::TerrainTechnique* Terrain::readTerrainTechnique(DataInputStream* in)
+{
+    bool hasTechnique = in->readBool();
+    if (!hasTechnique) return 0;
+    
+    int id = in->readInt();
+    if (id==IVEGEOMETRYTECHNIQUE)
+    {
+        return new osgTerrain::GeometryTechnique;
+    }
+    else
+    {
+        return 0;
+    }
+}
diff --git a/src/osgPlugins/ive/Terrain.h b/src/osgPlugins/ive/Terrain.h
new file mode 100644
index 000000000..fe5883793
--- /dev/null
+++ b/src/osgPlugins/ive/Terrain.h
@@ -0,0 +1,37 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2008 Robert Osfield 
+ *
+ * This library is open source and may be redistributed and/or modified under  
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ * 
+ * This library 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 
+ * OpenSceneGraph Public License for more details.
+*/
+
+#ifndef IVE_TERRAIN
+#define IVE_TERRAIN 1
+
+#include <osgTerrain/Terrain>
+
+#include "ReadWrite.h"
+
+namespace ive
+{
+
+class Terrain : public osgTerrain::Terrain, public ReadWrite
+{
+public:
+	void write(DataOutputStream* out);
+	void read(DataInputStream* in);
+
+        void writeTerrainTechnique(DataOutputStream* out, osgTerrain::TerrainTechnique* technique);
+        osgTerrain::TerrainTechnique* readTerrainTechnique(DataInputStream* out);
+        
+};
+
+}
+
+#endif