On Monday 01 March 2010, Jonathan Greenberg wrote: > As far as sample code goes, simply getting > grass_to_raster=raster("somegrassfile") is my goal -- my understanding > is anything rgdal can read, raster can read. Running your command I > do get: > > GRASS (ro): GRASS Database Rasters (5.7+) > > But with rgdal: > > require(rgdal) > gdaldrivers=getGDALDriverNames() > gdaldrivers$create[gdaldrivers$name=="GRASS"] > [1] FALSE > gdaldrivers$copy[gdaldrivers$name=="GRASS"] > [1] FALSE > gdaldrivers$create[gdaldrivers$name=="GTiff"] > [1] TRUE > gdaldrivers$copy[gdaldrivers$name=="GTiff"] > [1] TRUE > > Am I perhaps missing an rgdal installation flag that is required to > enable GRASS rasters? > > --j
Could be. How did you install GRASS/GDAL/rgdal? Dylan > > > On Mon, Mar 1, 2010 at 6:04 PM, Dylan Beaudette > > <dylan.beaude...@gmail.com> wrote: > > Roger can likely point out the problem after some example code is > > posted. In the mean time I would suggest checking to make sure your > > GDAL is compiled _without_ GRASS support, and that the GDAL GRASS > > plugin is correctly installed. > > > > This is how I check on my machine: > > > > gdal_translate --formats | grep -i grass > > GRASS (ro): GRASS Database Rasters (5.7+) > > > > Cheers, > > Dylan > > > > On Mon, Mar 1, 2010 at 5:44 PM, Alex Mandel <tech_...@wildintellect.com> wrote: > >> spgrass6 is a an R package and has read/write access to GRASS datasets. > >> It's usage would be instead of rgdal(well sorta, rgdal is required by > >> spgrass6). Both write objects to sp types. > >> You can use it from within R to start a GRASS session or within GRASS to > >> start a linked R session. > >> http://cran.r-project.org/web/packages/spgrass6/index.html > >> > >> I got GDALinfo to work on my machine, I wonder if your just missing the > >> gdal-grass library, or libgrass. > >> > >> On ubuntu it's something like libgdal1-1.6.0-grass > >> I know qgis needs this to work with GRASS not sure about gdal itself but > >> based on http://gdal.org/frmt_grass.html probably. Also note that page > >> talks about the path to a dataset that should be used. > >> > >> > >> Thanks, > >> Alex > >> > >>> Hmm, I'm trying to use the raster package via rgdal to access these > >>> files -- I'm trying to avoid having to export then to another format > >>> (I'm dealing with gigabytes of rasters), although I suppose I could do > >>> this. Does spgrass6 "enable" rgdal to access GRASS rasters, or is it > >>> its own standalone program? How does the base gdal package work with > >>> grass rasters? > >>> > >>> --j > >>> > >>> On Mon, Mar 1, 2010 at 2:35 PM, Sarah Goslee <sarah.gos...@gmail.com> wrote: > >>>> I think you need to export it from grass first, with r.out.gdal > >>>> > >>>> Or you can use spgrass6 to work with R and GRASS directly. > >>>> > >>>> Sarah > >>>> > >>>> On Mon, Mar 1, 2010 at 5:17 PM, Jonathan Greenberg > >>>> > >>>> <greenb...@ucdavis.edu> wrote: > >>>>> Folks: when trying to import or GDALinfo a grass raster, where, > >>>>> exactly, should I be pointing to in the grass directory? I tried > >>>>> pointing to the file with the same name as the raster I want to work > >>>>> with in the fcell, cellhd, and cell directories > >>>>> (grass/location/mapset), but none of these are working... thanks! > >>>> > >>>> -- > >>>> Sarah Goslee > >>>> http://www.functionaldiversity.org > >>> > >>> _______________________________________________ > >>> R-sig-Geo mailing list > >>> R-sig-Geo@stat.math.ethz.ch > >>> https://stat.ethz.ch/mailman/listinfo/r-sig-geo > >> > >> _______________________________________________ > >> R-sig-Geo mailing list > >> R-sig-Geo@stat.math.ethz.ch > >> https://stat.ethz.ch/mailman/listinfo/r-sig-geo -- Dylan Beaudette Soil Resource Laboratory http://casoilresource.lawr.ucdavis.edu/ University of California at Davis 530.754.7341 _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo