[GRASS5] [bug #1566] (grass) vector data select by attribute

GRASS GRASS developer
,
1

this bug's URL: http://intevation.de/rt/webrt?serial_num=1566
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Subject: vector data select by attribute

grass binary for platform: Compiled from Sources
GRASS Version: 5.0.0 (Aug 2002)

Improved support for selecting vector data by attribute (eg: 200m contours from a vector map of contour data) and to select from multiple maps to create a new map (or ideally to create a virtual map with pointers to the data, which may optionally be saved as a new map).

I'm not sure if the 5.1 data management in PostGreSQL/PostGIS will permit this through the use of db views, if GRASS 5.1 can access such views as maps. If so, then the wish is coming true :slight_smile:

Thanks,

   Brent Wood

-------------------------------------------- Managed by Request Tracker

2

On Monday 03 February 2003 05:37 am, Request Tracker wrote:

this bug's URL: http://intevation.de/rt/webrt?serial_num=1566
-------------------------------------------------------------------------

Subject: vector data select by attribute

grass binary for platform: Compiled from Sources
GRASS Version: 5.0.0 (Aug 2002)

Improved support for selecting vector data by attribute (eg: 200m contours
from a vector map of contour data) and to select from multiple maps to
create a new map (or ideally to create a virtual map with pointers to the
data, which may optionally be saved as a new map).

I'm not sure if the 5.1 data management in PostGreSQL/PostGIS will permit
this through the use of db views, if GRASS 5.1 can access such views as
maps. If so, then the wish is coming true :slight_smile:

Thanks,

   Brent Wood

Standard way to do this in 5.1 (format and db driver independent) is:
v.extract where=
v.patch

It is true that you can use views, but it is not intended for
normal usage.

Radim