Ray Drapek writes:
> 
>      I'm having problems with vector files (again). I've been running GRASS
> 4.0 and was doing a lot of editing on vector files created in v.digit. I am
> trying to patch two such vector maps together using v.patch. Both files have 
> attributes associated with areas (area labels) and I want those attributes 
> to be in the new combined map. However, the attributes for one of the maps
> is never to be found in the combined map. I suspect that there is a 
> corruption of one of the files associated with this vector map. Earlier

I reported this bug to the grass-bug list some months ago, and I believe 
Olga tried to fix it (is this in the latest update?).

> I did a v.clean on this file. After running v.clean all of the attributes 
> disappeared from the file. I'm not totally sure that v.clean is what 
> removed all of the attributes, but it is the only process I can recall 
> performining on that vector file at the time that all of the attributes 
> disappeared. I had the system administrator go into the archives and retrieve 
> the old file (pre-v.clean) with its attributes. We copied two archived files 
> back, the dig file and the dig_plus file. I examined the new-old map both 
> with d.vect and with v.digit and it looked to be in good shape. All of the 
> boundaries and all of the attributes were still there, but it is this new-old 
> vector file that never passes its attributes on to the "daughter" file when 
> patched with another vector file.

A quick & dirty solution to the problem is this: copy the dig_att files 
of the original maps to some harmless location, run v.patch, then cat the 
original dig_att files to the name of the new map and run v.support

Philip Verhagen

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