Hi
I would be grateful for some tips on the steps to export a DEM with, raster and vector layers to the vtk format for visualization in 3D Paraview. My ultimate objective once in paraview is to export the model into a file format that can be converted into a dae file format so it can be loaded as a 3D model in google earth. Specifically I wish to drape different images on a dem and visualise them in google earth above the surface of the area concerned. There may be a better method to achieving this from Grass however output to VTK seems to be the best option as a starting point. My datasets include a clipped area taken from an Aster DEM, matching aerial image rasters and vectors (ie clipped to the same shapefile) that are using the Geographic Projection EPSG code 4326. I have been able to import these into Grass and visualise them using NVIZ no problems. I have searched extensively for help on the steps to export rasters to vtk and attempted exporting rasters using both r.out.vtk and r3.out.vtk but in Paraview I either get a blank window or a single line I Paraview that can be rotated in 3d. If someone could advise the steps or point me to some online resources setting out the steps, I would be most grateful. I wonder if my Aster DEM is in the correct format as it is. Or does it need converting to a different format first - ie 1 3D voxel format. Any help would be very much appreciated. Regards David
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