[vtkusers] How to drape land surface image over 3D terrain surface recreated from DTED or DEM data

Elvis Dowson elvis.dowson at mac.com
Sun Nov 2 10:13:55 EST 2008

Hi Karthik,
                    Thanks for the reply. Yes, this is what I am  
trying to do. Which vtk classes should I use, and could you point me  
to some relevant vtk tck/cxx examples. My only concern is in assigning  
the texture co-ordinates.

The land surface photographs are taken at a distance of 500m. The  
reconstructed DEM data is taken at 3 arc seconds resolution, which is  
90m. I'm not sure how to co-related the surface photograph with the  
DEM data. What should I consider, so that the representation is as  
accurate as possible?

Best regards,

Elvis Dowson

On Nov 2, 2008, at 6:07 PM, Karthik Krishnan wrote:

> I assyme you are trying to texture map a photograph
> onto the surface. You need to assign texture coords
> and apply the photo as a texture onto the surface. Assigning
> texture coords to the polydata should be pretty easy, since
> for DEM data, you can map the photo onto the XY plane.

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