readRAST6: too many open files

On Tue, 5 May 2009, Agustin Lobo wrote:

Roger,

After upgrading, the test works with plugin=F,
while plugin=T produces the same result.

I find this too on Fedora 10, plugin=TRUE fails after a hundred or so calls, 
and then crashes R on a further command. With plugin=FALSE, there is no 
problem at all. The problem then lies in the plugin driver, which isn't 
anything that spgrass6 can do anything about. It looks as though the plugin 
is opening file handles to GRASS files but not closing them. I'll try to ask 
on the GDAL and grass-dev lists. For the time being, it seems best to use 
plugin=FALSE in readRAST6().

Also, ignore.stderr=T yields:

ERROR 6: SetColorTable() only supported for Byte or UInt16 bands in TIFF 
format.

This is a GRASS version issue, more recent GRASS support a flag to avoid 
r.out.gdal trying to write non-existent colour tables. Could you repeat your 
GRASS version:

execGRASS("g.version")

should do it.

WARNING: Input raster map constains cells with NULL-value (no-data). The
        value 999 was used to represent no-data values in the input
        map.You can specify nodata value by nodata parameter.

Maybe set a NODATA= value in the readRAST6() call to avoid heuristics trying 
to find a possible value?

Roger

/media/Transcend/Montseny/GrassData//carlos/A_TOTAL/.tmp/caminoccg/nomdum 
has GDAL driver GTiff
and has 94 rows and 116 columns

which is not including any more the first lines that we had with the 
previous version:

raster map/current region mismatch detected in components:
          cols            rows origin.northing  origin.easting
          TRUE            TRUE           FALSE            TRUE
set plugin=TRUE to override; continuing with plugin=FALSE

Now we have:

sessionInfo()

R version 2.9.0 (2009-04-17)
i486-pc-linux-gnu

locale:
LC_CTYPE=es_ES.UTF-8;LC_NUMERIC=C;LC_TIME=es_ES.UTF-8;LC_COLLATE=es_ES.UTF-8;LC_MONETARY=C;LC_MESSAGES=es_ES.UTF-8;LC_PAPER=es_ES.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=es_ES.UTF-8;LC_IDENTIFICATION=C

attached base packages:
[1] stats     graphics  grDevices utils     datasets  methods   base

other attached packages:
[1] spgrass6_0.6-4 XML_1.95-3     rgdal_0.6-7    sp_0.9-36

loaded via a namespace (and not attached):
[1] grid_2.9.0      lattice_0.17-22

We are trying now with our process, that takes much longer than the test, 
we'll let you know.

Thanks!

Agus