[R-sig-Geo] readOGR and PostGIS: "Error getting field 0"

[Roger Bivand]

On Fri, 30 Nov 2012, Mathieu Basille wrote:

> Roger,
>
> It works beautifully! Checkout and compilation went successfully without any 
> problem, and now readOGR can read layers with no field. As a matter of fact, 
> it doesn't even need a primary key, just the geometry field. If there is a 
> primary key, it is used as 'FID', if there is no primary key, a 'FID' field 
> is created starting at 0.
>
> This is perfect, thanks a lot!

Thanks for checking, I'll put a release submission together.

Roger

>
> Mathieu.
>
>
> Le 30/11/2012 11:56, Roger Bivand a écrit :
>> On Fri, 30 Nov 2012, Mathieu Basille wrote:
>> 
>>> Le 30/11/2012 11:27, Roger Bivand a écrit :
>>>> [...]
>>>> 
>>>> Thanks very much, this is the information needed, that there are no 
>>>> fields.
>>>> It appears that at least in this driver, readOGR() needs to be able to
>>>> return a geometry-only object, or to create a GID column in the 
>>>> data.frame.
>>>> I'll let you know when I've committed to R-forge, and will be very 
>>>> grateful
>>>> if you can check out the source package, install, and test whether the
>>>> changes have helped. It may take a little time to get there, but I'll 
>>>> give
>>>> it priority.
>>> 
>>> I'd be happy to test when it's ready! However, no need to hurry: in the
>>> meantime, it is still possible (and easy) to add a dummy field to make
>>> readOGR work.
>> 
>> OK, thanks. SVN revision 389 committed to R-forge project rgdal, checkout
>> from:
>> 
>> svn checkout svn://scm.r-forge.r-project.org/svnroot/rgdal/pkg
>> 
>> and rename pkg -> rgdal (to avoid getting multiple branches), then try
>> R CMD check rgdal, if OK INSTALL, and try your problem.
>> 
>> Roger
>> 
>>> 
>>> Thank you very much for you work!
>>> Mathieu.
>>> 
>>> 
>>>> Roger
>>> 
>>> 
>>> 
>> 
>
>

-- 
Roger Bivand
Department of Economics, NHH Norwegian School of Economics,
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