[GRASS-user] UTM concepts

[Dylan Beaudette]

On Sunday 08 October 2006 17:05, Seb wrote:
> Hi,
>
> I'm trying to learn GRASS a second time and find myself struggling again
> with the basic issue of defining a region.
>
> I have a series of data sources with varying projections and extents
> covering the region I'm interested in.  I would like to work on a UTM
> projection with WGS84 datum for all analyses of this region, so would have
> to reproject and clip the original data sources to this standard.
>
> Since the region of interest covers several UTM zones, I don't understand
> how I should define the region for this project.  For instance, If I
> choose the UTM zone corresponding to the center of the region I'm
> interested in, how does one specify the limits of the region, considering
> that the data will span several (4) UTM zones?
>
> I may not be strictly on-topic with this question, but hopefully someone
> can point me to some source of info for learning this from a GRASS user
> perspective.  Thanks in advance.
>
>
> Cheers,

Hi,

I would recommend working with a different projection which can handle the 
large region. Some common ones which come to mind: albers conic equal area or 
lamber conformal conic.

cheers,

-- 
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341