[R-sig-Geo] rgdal and grass rasters

[Alex Mandel]

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.goslee at 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
>> <greenberg at 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
>>
> 
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