[GRASS-user] Using v.surf.rst

[Eric]

I'm very new to GRASS and an experienced programmer.

 

My goal is to import isolines (elevation lines) as well as elevation points
from another mapping program into GRASS and then interpolate a raster based
on the vector data and then export as a DEM file.

 

To that end I have reviewed

 

http://grass.osgeo.org/grass64/manuals/html64_user/v.in.ascii.html

http://grass.osgeo.org/grass64/manuals/html64_user/v.surf.rst.html

 

I think I understand the principals but am getting stuck on several details.

 

As a simple test I attempted to create an ASCII file with X Y Z coordinates:

 

myFile.txt

593493|4914730|123

591950|4923000|222

589860|4922000|232

590400|4922820|143

593549|4925500|442

600375|4925235|342

 

 import with 

 

v.in.ascii -z input=myFile.txt output=secondTry z=3

 

I get v.in.ascii complete (no error messages)

 

and then 

 

run v.surf.rst input=secondTry at PERMANENT elev=secondTryRaster

 

This yields the error

 

some points outside of region -- will ignore...

there are points outside specified 2D/3D region--ignored 6 points

ERROR2: zero points in the given region!

ERROR: Input failed

 

Keeping in mind I'm completely new to GRASS (and don't understand a lot of
the jargon), can you explain what I'm doing wrong?

 

Also, can you recommend a tutorial that covers this type of conversion
oriented toward beginners?

 

Thanks!

 

Eric 

 

 

After importing the data points, I do not see anything at all visually in
GRASS GIS Map Display.

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