[vtkusers] data for 3D surface

[Doug Henry]

I am looking to make a surface plot similar to matlab's surf function. I 
have location (az,el) and magnitude data, which can easily be turned in to 
x,y,z data if needed, and I would like to create a simple surface (mesh) 
from this data. What options are available for doing this? Do I need data at 
regular intervals, I saw reference to structured and unstructured grids.

-thanks
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