[GRASSLIST:3378] seeking advice on improving results with s.surf.rst

[Neil Ripley]

Hello all,

I am attempting to interpolate a continuous surface using s.surf.rst. My 
source data is a rasterized contour map which I have converted into a GRASS 
site file using the r.to.sites command.

The problem I have is that the segment edges are very apparent in the 
results I am getting from s.surf.rst. I am not getting a smoothly continuous 
surface as I expect I should. Instead I have clear and distinct breaks that 
coincide with the segmentation boundaries.

I have tried running the operation with different segmax values, different 
tension values, and different smoothness settings in an effort to reduce or 
eliminate the discontinuities but with little success.

Has anyone got any advice they would be willing to share on how to go about 
producing surfaces from contours using s.surf.rst?

Thanks,

Neil Ripley
Dept. of Geography
University of Western Ontario

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