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

[Roger Bivand]

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
>>>
>>> _______________________________________________
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>>> R-sig-Geo at r-project.org
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>>>
>>
>> --
>> 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
>>
>> _______________________________________________
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>>
>

-- 
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