[GRASS-user] Uploading bounding box of vectors to database?

[Christian Schwartze]

Just a quick idea, when an underlying postgres/postgis database is 
available:

    - use v.out.ogr to import vector data to your postgis database, to 
testtable
    - now db.connect and db.login
    - when connected, something like "echo 'UPDATE testtable SET 
wkb_geometry=envelope(wkb_geometry)' | db.execute" should work
    - but not yet in the attribute table... (?)

...maybe too difficult.

Christian.






--------------------------------------------------
From: "Christian Kaiser" <Christian.Kaiser at unil.ch>
Sent: Tuesday, January 05, 2010 6:28 PM
To: <grass-users at lists.osgeo.org>
Subject: [GRASS-user] Uploading bounding box of vectors to database?

> Hi everybody,
>
> I would like to do a very simple thing:
> upload the bounding box for each geometry (areas, boundaries, lines) to 
> the attribute table.
>
> v.to.db does not seem to provide this functionality. Is there an elegant 
> way for doing this?
>
> Of course, I could write out the map using v.out.ascii in standard format, 
> parse this file using Python and extract the bounding box for each 
> geometry this way. Is probably not very elegant, but could lead to a 
> working Python module.
>
> Or would it be more useful to implement this functionality in v.to.db? (I 
> did never program in C with GRASS, but maybe, I could try with some 
> help...)
>
> Thank you for any suggestion.
>
> Christian Kaiser
> _______________________________________________
> grass-user mailing list
> grass-user at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-user