Hello, Andreas
I digitized a topographic map (scale 1:25000) to get a vector
data set with contours, representing the elevation.How to interpolate the vector data set to generate a raster
data set representing the elevation information?
s.surf.tps offers the most control over such interpolations. Use v.to.rast to
convert your contour lines to raster at an appropriate resolution (20m ?), then
use r.stats -1zg input=raster_file_name | s.in.ascii sites=new_sitesfile_name .
We found it helpful to thin out the raster data a little with r.random; we ended
up using 30% of the original raster cells to get good results. The unused cells
can be used to check the interpolated output.
You could also get your hands on a pre-alpha (?) version of v.surf.tps from
irena@zorro.cecer.army.mil (hope that's the correct address!). No documentation
on this one yet!
Regards,
--
Malcolm D. Williamson - Research Assistant E-mail: malcolm@cast.uark.edu
Center for Advanced Spatial Technologies Telephone: (501) 575-6159
Ozark Rm. 12 Fax: (501) 575-3846
University of Arkansas
Fayetteville, AR 72701