[R-sig-Geo] writeOGR error: problem with GDAL (libgdal1- 1.7.0)

[Henk Sierdsema]

Hi Roger,
 
You're right of course: replacing the library with an older version works, but it's definitely not chique. So I looked into the problem a little bit deeper, following up on the remarks of Agus. It turns out, that the latest version of rgdal works fine with variable-names up to 10 characters, but crashes on longer variable-names. The problem appears apparently both on a Linux- (Ubuntu 9) and Windows-platforms (XP, Win7).
 
Henk
 

________________________________

Van: Roger Bivand [mailto:Roger.Bivand at nhh.no]
Verzonden: wo 21-7-2010 23:17
Aan: Henk Sierdsema; Agustin Lobo; r-sig-geo at stat.math.ethz.ch
Onderwerp: SV: [R-sig-Geo] writeOGR error: problem with GDAL (libgdal1- 1.7.0)


Success is of course in the eye of the beholder. You are free to change your own installation in arguably bad ways, but please do not advise others to do so on the list. Lots of peoiple may be misled by your suggestion. It would be possible to rebuild (guessing that you are using Windows) to rebuild an older source rgdal for newer R in order to retain previous behaviour, but messing with an installed library of R packages is always a questionable idea.

Roger

PS. Since the original posting was made (two months ago), rgdal has been revised, including IIRC changed messages in this case.

--- Roger Bivand, NHH, Helleveien 30, N-5045 Bergen, Roger.Bivand at nhh.no

________________________________

Fra: r-sig-geo-bounces at stat.math.ethz.ch på vegne av Henk Sierdsema
Sendt: on 2010-07-21 13:17
Til: Agustin Lobo; r-sig-geo at stat.math.ethz.ch
Emne: Re: [R-sig-Geo] writeOGR error: problem with GDAL (libgdal1- 1.7.0)



Hi Augustin,

I've encountered the same problem after an update of the rgdal-package. I have resolved the problem by removing the rgal-folder in the library and replacing it by an older version of November 2009. You can download that version of www.sovon.nl/temp/rgdal_nov_2009.zip

Success!

Henk



-----Oorspronkelijk bericht-----
Van: r-sig-geo-bounces at stat.math.ethz.ch
[mailto:r-sig-geo-bounces at stat.math.ethz.ch]Namens Agustin Lobo
Verzonden: vrijdag 21 mei 2010 7:39
Aan: r-sig-geo at stat.math.ethz.ch
Onderwerp: [R-sig-Geo] writeOGR error: problem with GDAL (libgdal1-
1.7.0)



I'm getting this error using a command and an object that
used to work few months ago

> writeOGR(Montseny20090409shtotspols, dsn="Montseny20090409tots2",
> layer="Montseny20090409shtots2",driver="ESRI Shapefile")
Error in writeOGR(Montseny20090409shtotspols, dsn = "Montseny20090409tots2",
:

        GDAL Error 1: Invalid index : -1
Calls: writeOGR -> .Call
In addition: Warning messages:
1: In writeOGR(Montseny20090409shtotspols, dsn = "Montseny20090409tots2",  :

        Non-fatal GDAL Error 6: Normalized/laundered field name: 'coords.x1.1' to
'coords.x1.'
2: In writeOGR(Montseny20090409shtotspols, dsn = "Montseny20090409tots2",  :

        Non-fatal GDAL Error 6: Normalized/laundered field name: 'coords.x2.1' to
'coords.x2.'

Both the Error and Warnings are new, and are actually related: if I do:
> names(Montseny20090409shtotspols at data)[31]<-"UTMX"
> names(Montseny20090409shtotspols at data)[32]<-"UTMY"

writeOGR() works fine.

Could a more explicit error message, linking the error to the problem with
the names, be issued by writeOGR() ? Initially I even thought I could have a
disk problem!

I recently upgraded from ubuntu 9.04 to 9.10 and to libgdal1-1.7.0.
R version 2.11.0 (2010-04-22)
 Package: rgdal
Version: 0.6-27
Date: 2010-05-11

Thanks

Agus
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