[GRASSLIST:10198] Re: Problems with r.proj - grass 6.01

[morten at untamo.net]

Quoting Helmut Kudrnovsky <hellik at web.de>:

> Then i started location (2) and wanted to re-project the orthofoto 
> from location (1) with r.proj into the current location. I set the 
> resolution to 1 in the location and in the input of r.proj and the 
> option „Do not perform region cropping optimization“.

Unless you are working with global maps you should let r.proj do region 
cropping for you. Otherwise, if input and output are not overlapping, 
you will end up with an empty map. r.proj will normally warn you that 
the input map is outside the currrent region, but not so if you disable 
region cropping.

There is no need to set a current region of the input location - r.proj 
will only look at the map's extent, NOT at the WIND file that contains 
the last active region settings for the input location. On the output 
side r.proj will honor current region settings and create a map that 
is, at most, the size of the current region.

What result do you get do not disable region cropping?

rgds
Morten


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