Suggestion: option overwrite=T for writeOGR()

Roger,

is this all you need? I thought sessionInfo was providing everything
needed.

The driver is "ESRI Shapefile" as stated in the command, have not tested 
any other (it does work for raster though, as you mention):

require(rgdal)

Loading required package: rgdal
Geospatial Data Abstraction Library extensions to R successfully loaded
Loaded GDAL runtime: GDAL 1.8dev, released 2010/01/19
Path to GDAL shared files: /usr/local/share/gdal
Loaded PROJ.4 runtime: Rel. 4.7.1, 23 September 2009
Path to PROJ.4 shared files: (autodetected)

Thanks

Agus

2010/12/10 Roger Bivand <Roger.Bivand at nhh.no>:

On Fri, 10 Dec 2010, Agustin Lobo wrote:

Roger,

It does not for me. The error is solved by deleting files xygcatLO.* ,
while directory xygcatLO may continue to exist.

Agus,

With which drivers, OGR version (in header when rgdal loads)? If I cannot
reproduce this, I cannot readily help.

Roger

Also, I've found that with this version the below command does not
save the files within
the folder indicated by dsn, but outside. This was not the case in the
past, but do not know if this is
because of a change in rgdal, gdal or ubuntu 10.04 (I've changed all 3
since the last time I used writeOGR()).

writeOGR(xygcatLO,dsn="xygcatLO",layer="xygcatLO", driver="ESRI
Shapefile")

Error in writeOGR(xygcatLO, dsn = "xygcatLO", layer = "xygcatLO",
driver = "ESRI Shapefile") :

? ? ? ?GDAL Error 1: Layer 'xygcatLO' already exists
Calls: writeOGR -> .Call

sessionInfo()

R version 2.12.0 (2010-10-15)
Platform: x86_64-pc-linux-gnu (64-bit)

locale:
[1] LC_CTYPE=en_US.utf8 ? ? ? ? ?LC_NUMERIC=C
[3] LC_TIME=en_US.utf8 ? ? ? ? ? LC_COLLATE=en_US.utf8
[5] LC_MONETARY=en_US.utf8 ? ? ? LC_MESSAGES=en_US.utf8
[7] LC_PAPER=en_US.utf8 ? ? ? ? ?LC_NAME=en_US.utf8
[9] LC_ADDRESS=en_US.utf8 ? ? ? ?LC_TELEPHONE=en_US.utf8
[11] LC_MEASUREMENT=en_US.utf8 ? ?LC_IDENTIFICATION=en_US.utf8

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

other attached packages:
[1] RANN_2.1.2 ? ? ?outliers_0.13-3 rgdal_0.6-30 ? ?raster_1.7-2
[5] sp_0.9-73 ? ? ? rkward_0.5.4

loaded via a namespace (and not attached):
[1] grid_2.12.0 ? ? lattice_0.19-13 tools_2.12.0
2010/12/10 Roger Bivand <Roger.Bivand at nhh.no>:

On Thu, 9 Dec 2010, Barry Rowlingson wrote:

On Thu, Dec 9, 2010 at 8:56 AM, Agustin Lobo <alobolistas at gmail.com>
wrote:

Hi!

Could an option overwrite=T (default overwrite=F) be included in
writeOGR()?
Thanks!

Submit a Feature Request here:

http://sourceforge.net/tracker/?group_id=84716&atid=573625

No, rgdal is on R-Forge, and a list called rgdal-devel will be available
from tomorrow.

It looks like it just needs to be a wrapper around OGR's delete layer
function.

Contributions welcome. Note that the facility is present for rasters,
which
I fould out by accidentally deleting GRASS database objects (for which of
course I did not have backups). Is this really needed - which drivers do
not
already overwrite without complaint? These do not complain for me:
driver="ESRI Shapefile"; driver="KML"; driver="MapInfo File";
driver="MapInfo File", dataset_options="FORMAT=MIF".

Hope this helps,

Roger

Barry

--
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

--
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