diff --git a/include/osgUtil/SceneView b/include/osgUtil/SceneView
index 333c49198..7e19cd3e9 100644
--- a/include/osgUtil/SceneView
+++ b/include/osgUtil/SceneView
@@ -197,13 +197,13 @@ class OSGUTIL_EXPORT SceneView : public osg::Referenced, public osg::CullSetting
           * Returns false if matrix is not an orthographic matrix, where parameter values are undefined.*/
         bool getProjectionMatrixAsOrtho(double& left, double& right,
                                         double& bottom, double& top,
-                                        double& zNear, double& zFar);
+                                        double& zNear, double& zFar) const;
 
         /** Get the frustum setting of a perspective projection matrix.
           * Returns false if matrix is not a perspective matrix, where parameter values are undefined.*/
         bool getProjectionMatrixAsFrustum(double& left, double& right,
                                           double& bottom, double& top,
-                                          double& zNear, double& zFar);
+                                          double& zNear, double& zFar) const;
 
         /** Get the frustum setting of a symmetric perspective projection matrix.
           * Returns false if matrix is not a perspective matrix, where parameter values are undefined. 
@@ -211,7 +211,7 @@ class OSGUTIL_EXPORT SceneView : public osg::Referenced, public osg::CullSetting
           * Asymmetric matrices occur when stereo, power walls, caves and reality center display are used.
           * In these configurations one should use the 'getProjectionMatrixAsFrustum' method instead.*/
         bool getProjectionMatrixAsPerspective(double& fovy,double& aspectRatio,
-                                              double& zNear, double& zFar);
+                                              double& zNear, double& zFar) const;
 
 
         /** Set the view matrix. Can be thought of as setting the position of the world relative to the camera in camera coordinates. */
@@ -230,7 +230,7 @@ class OSGUTIL_EXPORT SceneView : public osg::Referenced, public osg::CullSetting
         const osg::Matrixd& getViewMatrix() const { return _viewMatrix; }
 
         /** Get to the position and orientation of a modelview matrix, using the same convention as gluLookAt. */
-        void getViewMatrixAsLookAt(osg::Vec3& eye,osg::Vec3& center,osg::Vec3& up,float lookDistance=1.0f);
+        void getViewMatrixAsLookAt(osg::Vec3& eye,osg::Vec3& center,osg::Vec3& up,float lookDistance=1.0f) const;
 
 
 
diff --git a/src/osgUtil/SceneView.cpp b/src/osgUtil/SceneView.cpp
index b7faa9cf3..08667f9bd 100644
--- a/src/osgUtil/SceneView.cpp
+++ b/src/osgUtil/SceneView.cpp
@@ -1108,7 +1108,7 @@ void SceneView::setProjectionMatrixAsPerspective(double fovy,double aspectRatio,
 
 bool SceneView::getProjectionMatrixAsOrtho(double& left, double& right,
                                            double& bottom, double& top,
-                                           double& zNear, double& zFar)
+                                           double& zNear, double& zFar) const
 {
     return _projectionMatrix.getOrtho(left, right,
                                        bottom, top,
@@ -1117,7 +1117,7 @@ bool SceneView::getProjectionMatrixAsOrtho(double& left, double& right,
 
 bool SceneView::getProjectionMatrixAsFrustum(double& left, double& right,
                                              double& bottom, double& top,
-                                             double& zNear, double& zFar)
+                                             double& zNear, double& zFar) const
 {
     return _projectionMatrix.getFrustum(left, right,
                                          bottom, top,
@@ -1125,7 +1125,7 @@ bool SceneView::getProjectionMatrixAsFrustum(double& left, double& right,
 }                                  
 
 bool SceneView::getProjectionMatrixAsPerspective(double& fovy,double& aspectRatio,
-                                                 double& zNear, double& zFar)
+                                                 double& zNear, double& zFar) const
 {
     return _projectionMatrix.getPerspective(fovy, aspectRatio, zNear, zFar);
 }                                                 
@@ -1135,7 +1135,7 @@ void SceneView::setViewMatrixAsLookAt(const Vec3& eye,const Vec3& center,const V
     setViewMatrix(osg::Matrixd::lookAt(eye,center,up));
 }
 
-void SceneView::getViewMatrixAsLookAt(Vec3& eye,Vec3& center,Vec3& up,float lookDistance)
+void SceneView::getViewMatrixAsLookAt(Vec3& eye,Vec3& center,Vec3& up,float lookDistance) const
 {
     _viewMatrix.getLookAt(eye,center,up,lookDistance);
 }