[GRASS-user] DEM resolution from r.surf.contour

[Markus Neteler]

On Wed, May 4, 2011 at 10:48 AM, Hanlie Pretorius
<hanlie.pretorius at gmail.com> wrote:
> Hi,
>
> I'd like to ask a question related to another question I was asking
> recently about converting contour vectors to rasters and creating a
> DEM from the raster contours using r.surf.contour.
>
> My supplied vector contour layer has 20m intervals between contour
> lines. When I convert this to raster, the smallest region resolution I
> can use is 5m, otherwise v.to.rast runs out of memory.

Please post
- GRASS version/OS
- g.region -p output
to better understand the problem.

Markus

> When I use r.surf.contour to create the DEM from the raster, which
> region resolution makes sense then? I set it to 20m because of the
> contour interval, but I'm starting to think that's not the best option
> because the interpolation between two contour lines should be as fine
> as possible.
>
> Any thoughts?
>
> Thanks
> Hanlie