[GRASS-user] “Random read is not supported by OGR for this layer, cannot build support.”

[Frank Warmerdam]

Spencer Fogg wrote:
> Hi, GRASS users! I am a novice, and have only been using this program 
> for a couple of months now. I'm having a problem using GRASS with 
> postgres for a project at work, and I was wondering if you guys could help.
> 
>  
> 
> I'm working with shapefiles, and want to display them in GRASS. Some of 
> these files are large enough to crash GRASS while cleaning, and even 
> more take longer to draw and redraw than I'd like. To avoid this, I'm 
> attempting to use v.external to connect to the files in a postGIS table, 
> created using shp2pgsql. When I run v.external, however, I get a strange 
> warning: "Random read is not supported by OGR for this layer, cannot 
> build support." Then when I try to display the created vector layer, 
> GRASS crashes.

Spencer,

On review of the OGR PostGIS driver I think this is a bug in the driver's
"TestCapabilities" method.  Are you in a position to rebuild your GDAL with
a patch?  I'd appreciate your filing a bug against GDAL/OGR for this issue,
and we can pursue the discussion there.

   http://trac.osgeo.org/gdal/

Best regards,
-- 
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I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
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