readOGR and PostGIS: "Error getting field 0"

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!

Mathieu.


Le 30/11/2012 11:56, Roger Bivand a ?crit :

On Fri, 30 Nov 2012, Mathieu Basille wrote:

Le 30/11/2012 11:27, Roger Bivand a ?crit :

[...]

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