[gdal-dev] Reading ArcInfo binary grids with the R rgdalpackage fails with "GDAL Error 3: Attempt to read past EOF in..../arc.dir"

[Jason Roberts]

It sounds like you have figured out the problem. Is now the moment that I
should contact the rgdal developers and ask them to build rgdal against the
1.6 branch?

Currently it looks like rgdal is built against the 1.6.1 release. I'm not
sure if they'll want to build against the current 1.6 branch or want to wait
until 1.6.2. Do you know when 1.6.2 might be issued?

Jason

-----Original Message-----
From: gdal-dev-bounces at lists.osgeo.org
[mailto:gdal-dev-bounces at lists.osgeo.org] On Behalf Of Even Rouault
Sent: Wednesday, July 22, 2009 2:25 PM
To: Gregory, Matthew
Cc: gdal-dev at lists.osgeo.org
Subject: Re: [gdal-dev] Reading ArcInfo binary grids with the R rgdalpackage
fails with "GDAL Error 3: Attempt to read past EOF in..../arc.dir"

Le Wednesday 22 July 2009 20:17:43 Gregory, Matthew, vous avez écrit :
>
> > For people affected by the issue, not being able to build
> > GDAL from source and not interested in the raster attribute
> > table, they can just rename the 'info'
> > directory, so it won't be read at all and won't trigger the error.
> >
> > See http://trac.osgeo.org/gdal/ticket/3031
>
> Um, this makes me really nervous to advocate renaming the INFO
> directory, but maybe I'm overreacting. 

This is just a workaround for people stuck with a version affected by the 
issue.

> I think your recent fix of not 
> calling ReadRAT() in AIGDataset::Open() eliminates this workaround,
> correct?

The workaround is still there, but yeah, the latest change in trunk makes it

more or less useless. 

> Just as long as the user doesn't call GetDefaultRAT()? 

There's no point trying to read the RAT until it is really needed. And the 
entry point for it is GetDefaultRAT(), hence the late opening of the RAT 
through the AVC driver in this method.

>
> matt


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