[GRASSLIST:9650] adding tables or creating new maps

GRASS GRASS user
1

Happy holidays everyone!

Quick question. I want to add a new table to a vector layer. The table already exists in postgres (already populated), and I want to add it as a new layer to vector A. Is this a job for v.db.addtable?

on the other hand, since I created the table in postgres by joining two other tables. I could actually replace the existing table 1 that the vector map is linked to. In this case, should I really looking at creating a new map with v.in.db (two of the columns/attributes in the new table are x and y coordinates)?

Thanks,

Kirk

2

Kirk,

GRASS layers were opaque to me until recently. Once I finally figured them
out, I actually wrote it up for the GRASS WIKI. You can find it on the
vector database page at
<http://grass.gdf-hannover.de/twiki/bin/view/GRASS/VectorDatabase&gt;

Michael
__________________________________________
Michael Barton, Professor of Anthropology
School of Human Evolution and Social Change
Arizona State University
Tempe, AZ 85287-2402

phone: 480-965-6213
fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton

From: Kirk Wythers <kwythers@umn.edu>
Date: Tue, 27 Dec 2005 12:03:41 -0600
To: List Users GRASS <GRASSLIST@baylor.edu>
Subject: [GRASSLIST:9650] adding tables or creating new maps

Happy holidays everyone!

Quick question. I want to add a new table to a vector layer. The
table already exists in postgres (already populated), and I want to
add it as a new layer to vector A. Is this a job for v.db.addtable?

on the other hand, since I created the table in postgres by joining
two other tables. I could actually replace the existing table 1 that
the vector map is linked to. In this case, should I really looking at
creating a new map with v.in.db (two of the columns/attributes in the
new table are x and y coordinates)?

Thanks,

Kirk

3

Michael, all,

thanks for extending the wiki page.
Please consider to also update
  vector/vectorintro.html
in the GRASS 6.1-CVS to also get the built-in documentation
useful. For native speakers it's often easier to describe
things in a clear way. Additional effect is that we bundle
documentation, to not have it scattered around in many places.

Also images are supported in the GRASS manual, see
for example
http://grass.itc.it/grass61/manuals/html61_user/r.terraflow.html

Thanks

Markus

On Tue, Dec 27, 2005 at 11:23:12PM -0700, Michael Barton wrote:

Kirk,

GRASS layers were opaque to me until recently. Once I finally figured them
out, I actually wrote it up for the GRASS WIKI. You can find it on the
vector database page at
<http://grass.gdf-hannover.de/twiki/bin/view/GRASS/VectorDatabase&gt;

Michael
__________________________________________
Michael Barton, Professor of Anthropology
School of Human Evolution and Social Change
Arizona State University
Tempe, AZ 85287-2402

phone: 480-965-6213
fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton

> From: Kirk Wythers <kwythers@umn.edu>
> Date: Tue, 27 Dec 2005 12:03:41 -0600
> To: List Users GRASS <GRASSLIST@baylor.edu>
> Subject: [GRASSLIST:9650] adding tables or creating new maps
>
> Happy holidays everyone!
>
> Quick question. I want to add a new table to a vector layer. The
> table already exists in postgres (already populated), and I want to
> add it as a new layer to vector A. Is this a job for v.db.addtable?
>
> on the other hand, since I created the table in postgres by joining
> two other tables. I could actually replace the existing table 1 that
> the vector map is linked to. In this case, should I really looking at
> creating a new map with v.in.db (two of the columns/attributes in the
> new table are x and y coordinates)?
>
> Thanks,
>
> Kirk

--
Markus Neteler <neteler itc it> http://mpa.itc.it
ITC-irst - Centro per la Ricerca Scientifica e Tecnologica
MPBA - Predictive Models for Biol. & Environ. Data Analysis
Via Sommarive, 18 - 38050 Povo (Trento), Italy