[GRASS-user] how to g.region

[Raffaello Brondi]

Wolf Bergenheim wrote:
> On 12.09.2007 20:01, Raffaello Brondi wrote:
>   
>>   4. region = the intersection of raster1 and raster2 --> ?
>>
>>
>> As far as i see, using the g.region command, there is no way to specify
>> the last point except to manually set the nord,sud,ovest and east
>> values, but unfortunately i can not use this way.
>> Is there any other command in GRASS that i can use instead of g.region
>> to set the current region as the intersection of two rasters?
>>     
>
> Hello,
>
> I assume you have some kind of programing language which executes grass
> commands. Can you parse the output? If so then you could do it like this:
>
> g.region rast=raster1
> g.region -p (parse the output, into rast1north, rast1east, rast1west,
> rast1south, etc)
> g.region rast=raster2
> g.region -p (parse the output, into rast2north, rast2east, rast2west,
> rast2south, etc)
> g.region north=(min of rast1north, rast2northe) etc for other parameters.
>
>
> Hope this helps,
> --Wolf
>
>   
Hello Wolf

Yes, the service i'm developing is written in Java.
Your solution is a good one but the problem is the overhead it introduces.
Since i can't (or maybe i'm not able to :( ) interact directly with 
GRASS using Java, i would need to make 4 files reading/writing.

thanx

Raffaello Brondi