[R-sig-Geo] Suggestion: option overwrite=T for writeOGR()

Sat Dec 11 18:49:54 CET 2010

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
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> R-sig-Geo mailing list
>>>>>>> R-sig-Geo at r-project.org
>>>>>>> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>>>>>>>
>>>>>>
>>>>>> --
>>>>>> 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
>>>>>>
>>>>>> _______________________________________________
>>>>>> R-sig-Geo mailing list
>>>>>> R-sig-Geo at r-project.org
>>>>>> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>>>>>>
>>>>>
>>>>
>>>> --
>>>> 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
>>>>
>>>> _______________________________________________
>>>> R-sig-Geo mailing list
>>>> R-sig-Geo at r-project.org
>>>> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>>>>
>>>
>>
>> --
>> 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
>>
>> _______________________________________________
>> R-sig-Geo mailing list
>> R-sig-Geo at r-project.org
>> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>>
>>
>

-- 
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