[GRASS-user] Cut Subscene

[Paulo van Breugel]

Hi Christian

Mask is only masking out areas, it doesn't change your extent. You need to
change your region bounds. You can set those is menu-Config-region-set
region (or g.region on the command line). Region is a very important concept
in GRASS GIS.If you are not familiar with regions, make sure to read a bit
more in the help files.

A quick way to change your region extend visually is in the map display
window, where you can set your region from the current display.

Cheers

Paulo



On Wed, Jul 20, 2011 at 5:32 PM, Christian Röttger <
chris.roettger at uni-muenster.de> wrote:

> Hello,
>
> i'm working with grass 6.4.1 and have a huge quickbird scene which i want
> to cut, so that i only work with a small sample area.
> i created a mask and performed all operations, working very well. but when
> i export the test area as geotiff it has the same extent as the huge base
> image.
> also tried to copy the masked area with mapcalc, same problem.
>
> what is the best way to cut huge images into pieces without loosing data
> information?
>
> thanks
> christian
>
>
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