[GRASS-user] High resolution dem

[Pablo Carreira]

Frank wrote:

> My contour map is a combinatin of a national contour line map (5m vert. 
> resolution) and contours from SRTM  with 20m vert. resolution. I created a 
> "hole" in the srtm contours for the national contour map and patched both 
> together to avoid large gaps with no height values (mostly for 
> r.surf.contour)
> My region is 17.000 x 13.000 cells wide (5m horiz. resolution).

I had good results interpolating 5m contours with v.surf.rst, but I spent some time adjusting the parameters to get a smooth surface.
IMHO You have a too big region to make this kind of computation and to use that resolution, later you will get more problens with the size of the data. Maybe you can use a lower resolution for large maps and a better resolution for specif areas of interest.

> If necessary I can illustrate my efforts by creating a web page or similar 

If you tell the final purpose of this work maybe we can find a better solution.

Regards.
Pablo.
 		 	   		  
_________________________________________________________________
Quer deixar seus vídeos mais divertidos? Com o Movie Maker isso fica fácil.
http://www.windowslive.com.br/public/tip.aspx/view/87?product=4&ocid=Windows Live:Dicas - Movie Maker:Hotmail:Tagline:1x1:Titulo Legendas Creditos
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/grass-user/attachments/20100225/c4c8462f/attachment.html