Map Projections

[grass at genie.saff.utah.edu]

No-- A location has to contain the same projections, as I understand it.
However, I had good success using r.resample on a ll projection in a ll
location, that covered three UTM zones.  I g.copy the file to a temp
mapset. Then with unix commands I moved 'mv' the temp mapset to the UTM
location. Then restarted grass in the UTM location and modified the
cellhd/file into utm coordinates using m.ll2u. 

Jason Carey
Snow Hydrology
University of Utah

On Fri, 13 Jun 1997, R.A.Sanderson wrote:

> Dear Grass Users,
> 
> Is there a simple way of using two map projections simultaneously in GRASS?
>  I have a GRASS location in UTM, but need to add new maps by digitising
> from base maps stored as latitude-longitude.  The v.digit command only
> seems able to cope with digitising using the same projection as the
> original location (in this case UTM). I could resort to using Arc/Info for
> digitising, then PROJECT/TRANSFORM into UTM before exporting to GRASS, but
> I'd prefer to carry out the whole operation in GRASS if possible.
> 
> Cheers
> Roy
> 
> ----------------------------------------------------------------------------
> Roy Sanderson
> Centre for Land Use and Water Resources Research
> Porter Building
> University of Newcastle
> Newcastle upon Tyne
> NE1 7RU
> United Kingdom
> 
> Tel: +44 191 222 7789
> Fax: +44 191 222 6563
> URL: http://www.cluwrr.ncl.ac.uk
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