[R-sig-Geo] file format error with R and GRASS61

[Roger Bivand]

On Thu, 19 Jan 2006, Kirk R. Wythers wrote:

> I am trying to figure out an GDAL error message about grass file not  
> being a supported format. The message is:
> 
>  > gmeta6 <- gmeta6()
>  > fname <- paste(gmeta6$GISDBASE, gmeta6$LOCATION_NAME,
> + "PERMANENT", "cellhd", "soils.ph",
> + sep="/")
>  > soilsph_GDAL <- read.GDAL(fname)
> Error in .local(.Object, ...) :
>          GDAL Error 4: `~/grassdata/spearfish60/PERMANENT/cellhd/ 
> soils.ph' not recognised as a supported file format.

If r.out.gdal works for you on that file, then we have a problem. However, 
I think that your GRASS GDAL plugin is not present, so GDAL doesn't know 
how to read GRASS rasters natively. What does 

> getGDALDriverNames()

say within R after loading the rgdal package, or equivalently

$ gdalinfo --formats

from the shell prompt? If you see "GRASS" there, we have a problem, if 
not, please make sure the GDAL GRASS plugin is installed and working (one 
does this *after* installing GRASS.

Roger

> 
> This is on grass61 and R 2.2.1 using the spearfish60 location
> 
> Thanks in advance for any ideas
> 
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-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no