Suggestion: option overwrite=T for writeOGR()

---------- Forwarded message ----------
From: Agustin Lobo <alobolistas at gmail.com>
Date: 2010/12/13
Subject: Re: [R-sig-Geo] Suggestion: option overwrite=T for writeOGR()
To: Roger.Bivand at nhh.no


Roger,

According to Synaptic, my gdal is 1.7.3,
I do not understand where the reported
GDAL runtime: GDAL 1.8dev
comes from. Could it have been installed by rgdal?

I've searched my disk and find gdal16 and gdal17 but not gdal18
Do you know if it is possible to tell rgdal which gdal should be used?

Thanks

Agus



2010/12/11 Roger Bivand <Roger.Bivand at nhh.no>:

On Fri, 10 Dec 2010, Agustin Lobo wrote:

Roger,

I was not aware that 1.8dev is actually older than 1.7.2 I'll check why I
have that gdal on the other machine and will try to fix that on my side on
Monday. But perhaps this problem will come up again for future stable
versions of 1.8.* ? Anyway, 1.8dev is clearly not a good choice and I have
to change it.

As of GDAL 1.8.0 SVN revision 21234, the problem exists. I'll fix this in
rgdal for the drivers I am familiar with before 1.8.0 is released.

Roger

Thanks

Agus

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

On Fri, 10 Dec 2010, Agustin Lobo wrote:

Roger,

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

You had given sessionInfo() but that does not report which GDAL you are
using. The report unfortunately does not give an svn revision, maybe
gdal-config --version does? I develop using 1.7.* GDAL. Your 1.8dev is
pretty old, certainly older that released 1.7.3. I can try to build a
current GDAL trunk from source next week, if I get time, but this looks
like
something in your setup (development GDAL that is now stale?).

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

I mentioned four variants of vector drivers, not raster.

Roger

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

--
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