How far into the second UTM Zone does your region go? If not far and the distortion is acceptable you can reproject 1 into the other.
Otherwise you need to find or create a Projection that does a better job of covering your region. A UTM projection is unlikely to be a good candidate in this case. Do you care more about preserving Area or Distance measures (that will help you pick an appropriate projection). So, no, you can not use 2 EPSG codes at the same time, you have to convert the data into a common projection. Thanks, Alex On 03/16/2016 08:10 AM, Mourad Boutouchent wrote: > I'm working on watershed hydrology, then I went to obtain drainage direction, > accumulation zones, streams system and elementary watersheds of a study area. > However I work on an area which belong to 2 EPSG (EPSG 3313 and EPSG 2972). > > I download all the SRTM tiles of the study area and have filled the voids. I > merged these tiles and projected the result in the EPSG 2972 (initially > WGS84). Of course, a part of the DTM has negative EAST coordinates which > cause errors when assinging region and running r.watershed and r.water.outlet. > I tryed to work in WGS84 but still r.water.outlet does not work. > > Is it possible to define a region with two EPSG? How achieve r.water.outlet > with success > I'm quite locked...Any help ? > > ------------------------------------------------------------------------------------ > B.Mourad > Laboratoire de Mathématiques Informatique et Applications > Université de Guyane > Tél : 06 63 81 50 29 > _______________________________________________ > grass-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/grass-user > _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
