Thanks Doug, this is great feedback. It is folks like you, and the others who responded, that making working w/ open sources tools a pretty awesome alternative.
Cheers, Derek On Fri, Mar 23, 2012 at 7:50 AM, <doug_newc...@fws.gov> wrote: > > Derek, > You can do this in GRASS ( using gdal in the background) by doing > the following: > 1) create a workspace in the same projection as your existing raster ( > when you first start GRASS it will ask you to set up a workspace with > projection information) > 2) import the existing raster layer into GRASS, ( r.in.gdal, > http://grass.fbk.eu/grass64/manuals/html64_user/r.in.gdal.html<http://grass.fbk.eu/grass64/manuals/html64_user/r.in.gdal.html> > ) > 3)set the region to match the imported raster layer in extent and > resolution (g.region, > http://grass.fbk.eu/grass64/manuals/html64_user/g.region.html) > <http://grass.fbk.eu/grass64/manuals/html64_user/g.region.html> > 4) import the county vector layer (v.in.ogr, > http://grass.fbk.eu/grass64/manuals/html64_user/v.in.ogr.html > ) <http://grass.fbk.eu/grass64/manuals/html64_user/v.in.ogr.html> > 5) convert the vector layer to a raster layer(v.to.rast, > http://grass.fbk.eu/grass64/manuals/html64_user/v.to.rast.html) > <http://grass.fbk.eu/grass64/manuals/html64_user/v.to.rast.html> > > When you create the new raster it will use the existing alignment and > resolution of the region ( based off of the existing raster) in the > placement of the cells. Even though I reference the tabular commands in > the above process, it can be easily done through both GRASS gui's > > Doug > > > > Doug Newcomb > USFWS > Raleigh, NC > 919-856-4520 ext. 14 doug_newc...@fws.gov > > --------------------------------------------------------------------------------------------------------- > The opinions I express are my own and are not representative of the > official policy of the U.S.Fish and Wildlife Service or Dept. of the > Interior. Life is too short for undocumented, proprietary data formats. > > > *Derek Morgan <jdmor...@unca.edu>* > Sent by: gdal-dev-bounces@lists.osgeo.org<gdal-dev-boun...@lists.osgeo.org> > > 03/22/2012 10:12 PM > To > gdal-dev@lists.osgeo.org > cc > Subject > [gdal-dev] shifting (or snapping) one raster to another > > > > > Hello, > > I am in a jam with ArcGIS, and am hoping there is a easier way to do > this with GDAL. Here is the situation: I am converting a vector > dataset of county polygons to raster at a pixel resolution of 231 m. > However, I want this to line up with a different raster dataset I have > at a much larger extent, but also the same resolution 231 m. As you > probably guessed the two datasets are slightly askew as they have > different extents. I would like to align the newly created county > raster with the larger raster data set by shifting (or snapping) it to > the closest pixels. Hopefully, this makes enough sense for someone to > let me know if this can be done in GDAL. > > Thanks ahead of time, > Derek > _______________________________________________ > gdal-dev mailing list > gdal-dev@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/gdal-dev > <http://lists.osgeo.org/mailman/listinfo/gdal-dev> >
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