[GRASS-user] import ascii error + how to build a tin

Michael Barton Michael.Barton at asu.edu
Wed May 23 12:13:04 EDT 2007

You may want to build a TIN for other reasons, but (unlike ArcGIS) you don¹t
need it in GRASS for displaying shaded relief maps and 2.5 (or even 3D)

There is a shaded relief module (r.shaded.relief) that runs directly from a
raster map. You can get 2.5-4D displays in NVIZ directly from rasters and
volumes (and 3D vectors too) without making a TIN.


On 5/22/07 10:19 AM, "Ricardo Oliveira" <autopilot at oniduo.pt> wrote:

> I am getting an error when importing a .xyz file with the coordinates
> of a scene. The only reason i am looking at is the fact that the z value
> is negative, and after the field separator (,).
> Also, after importing how should i build a surface (TIN) and create a
> shaded surface?
> Here is the error:
> Error reading ascii file:
> 1499.4708,4314.6574,-1.5260
> Thanks,
> Ricardo 

Michael Barton, Professor of Anthropology
School of Human Evolution & Social Change
Center for Social Dynamics & Complexity
Arizona State University

phone: 480-965-6213
fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton

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