[R-sig-Geo] libproj errors

[Roger Bivand]

On Thu, 10 Jun 2010, Dave Roberts wrote:

> Friends,
>
>   I recently became a GRASS convert. I have been an R user for a long time, 
> so naturally I have tried spgrass6.  Unfortunately I have yet to get it to 
> work.  The beginning goes well

>From the versions, it looks at though everything is rather aged. Upgrading 
may help - did you install binary packages, I guess you must have, because 
current source releases are GRASS 6.4.0 RC6, GDAL 1.7.2, and PROJ 4.7.0. 
Workaround below.

>
>> library(spgrass6)
> Loading required package: sp
> Loading required package: rgdal
> Geospatial Data Abstraction Library extensions to R successfully loaded
> Loaded GDAL runtime: GDAL 1.5.3, released 2008/09/09
> Path to GDAL shared files: /usr/share/gdal
> Loaded PROJ.4 runtime: Rel. 4.6.1, 21 August 2008
> Path to PROJ.4 shared files: (autodetected)
> Loading required package: XML
> GRASS GIS interface loaded with GRASS version: 6.3.0
> and location: grte
>
> but then (despite the reference to PROJ.4 above) when I try and get a raster 
> into R I get an error
>
>> test <- readRAST6('elev_30')
> Error in .local(.Object, ...) :
>
> 	GDAL Error 1: libproj.so: cannot open shared object file: No such 
> file or directory

Look at the arguments to readRAST6. If you set useGDAL=FALSE, the data 
will be copied to a simple binary file, and the GRASS r.out.gdal command 
will not be used.

Do the examples in readGDAL in rgdal work correctly? Do those in 
spTransform work correctly? If so, the GDAL/PROJ problem is most likely 
affecting the GDAL and/or PROJ versions used to build the r.out.gdal 
binary.

Hope this helps,

Roger

>
> but it appears to be there (twice actually)
>
>> system('find /usr -name libproj.so')
> /usr/local/lib/libproj.so
> /usr/lib/libproj.so
>
> I copied it from usr/local/lib to usr/lib thinking maybe it wasn't looking at 
> the right path, but it doesn't seem to find it in either location.  This 
> appears to be a GDAL error, rather than an R or spgrass6 error, but GRASS 
> runs fine.
>
> FWIW I'm running Fedora 10 x86_64, GRASS 6.3, GDAL 1.5.3, PROJ.4 4.6.1
>
> Thanks in advance for any help, Dave
>

-- 
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