[GRASS-user] Vector Overlay Map Disappears in 3D View

Hamish hamish_b at yahoo.com
Tue Jan 17 18:30:59 EST 2012


Hamish:
> > check your computational region with 'g.region -p'.
> > The resolution should be set so that rows and columns do not
> > exceed ~ 40000 x 40000 or so. (unless you have lots of RAM)


Rich wrote:
>   Could it be the resolution, not the number of rows x columns:
> 
> nsres:      2.95172027
> ewres:      2.03037658
> rows:       7372
> cols:       14816
> cells:      109223552

the two are just a function of one another. there will be some natural
minimum ground resolution size for your elevation data though beyond
which you are just recording noise.

use "g.region -a res=" to get a nice round numbered resolution.


while large, that rows x columns does not seem unreasonably huge for a
system with 4GB of RAM. (depends on what else you are running at the same
time I guess)


Hamish


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