v.info.html

<h2>DESCRIPTION</h2>

<em>v.info</em> reports some basic information (metadata) about a
user-specified vector map and its topology status.

<p>If topology info is not available (i.e., vector map cannot be open on
level 2), vector map extends and number of features need to be counted
on the fly which may take some time.

<h2>EXAMPLE</h2>

<h3>Basic metadata information</h3>

<div class="code"><pre>
v.info map=geology

 +----------------------------------------------------------------------------+
 | Name:            geology                                                   |
 | Mapset:          PERMANENT                                                 |
 | Location:        nc_spm_08                                                 |
 | Database:        /home/martin/grassdata                                    |
 | Title:           North Carolina geology map (polygon map)                  |
 | Map scale:       1:1                                                       |
 | Map format:      native                                                    |
 | Name of creator: helena                                                    |
 | Organization:    NC OneMap                                                 |
 | Source date:     Mon Nov  6 15:48:53 2006                                  |
 |----------------------------------------------------------------------------|
 |   Type of map: vector (level: 2)                                           |
 |                                                                            |
 |   Number of points:       0               Number of centroids:  1832       |
 |   Number of lines:        0               Number of boundaries: 3649       |
 |   Number of areas:        1832            Number of islands:    907        |
 |                                                                            |
 |   Map is 3D:              No                                               |
 |   Number of dblinks:      1                                                |
 |                                                                            |
 |   Projection: Lambert Conformal Conic                                      |
 |                                                                            |
 |               N:   318117.43741634    S:    10875.82723209                 |
 |               E:   930172.31282271    W:   123971.19498978                 |
 |                                                                            |
 |   Digitization threshold: 0                                                |
 |   Comment:                                                                 |
 |                                                                            |
 +----------------------------------------------------------------------------+
</pre></div>

<h3>Map history</h3>

<div class="code"><pre>
v.info -h map=geology

COMMAND: v.in.ogr input="geol.shp" output="geology" min_area=0.0001 snap=-1
GISDBASE: /bigdata/grassdata05
LOCATION: ncfromfile MAPSET: PERMANENT USER: helena DATE: Mon Nov  6 15:48:53 2006
---------------------------------------------------------------------------------
1832 input polygons
total area: 1.276093e+11 (1832 areas)
overlapping area: 0.000000e+00 (0 areas)
area without category: 0.000000e+00 (0 areas)
---------------------------------------------------------------------------------
</pre></div>

<h3>Attribute columns for given layer</h3>

<div class="code"><pre>
v.info -c map=geology

Displaying column types/names for database connection of layer <1>:
INTEGER|cat
DOUBLE PRECISION|onemap_pro
DOUBLE PRECISION|PERIMETER
INTEGER|GEOL250_
INTEGER|GEOL250_ID
CHARACTER|GEO_NAME
DOUBLE PRECISION|SHAPE_area
DOUBLE PRECISION|SHAPE_len
</pre></div>

<h3>Basic metadata information in shell script style</h3>

<div class="code"><pre>
v.info -get map=geology 

name=geology
mapset=PERMANENT
location=nc_spm_08
database=/home/martin/grassdata
title=North Carolina geology map (polygon map)
scale=1:1
format=native
creator=helena
organization=NC OneMap
source_date=Mon Nov  6 15:48:53 2006
level=2
map3d=0
num_dblinks=1
projection=Lambert Conformal Conic
digitization_threshold=0.000000
comment=
north=318117.43741634
south=10875.82723209
east=930172.31282271
west=123971.19498978
top=0.000000
bottom=0.000000
nodes=4556
points=0
lines=0
boundaries=3649
centroids=1832
areas=1832
islands=907
primitives=5481
</pre></div>

<div class="code"><pre>
v.info -g map=geology

north=318117.43741634
south=10875.82723209
east=930172.31282271
west=123971.19498978
top=0.000000
bottom=0.000000
</pre></div>

<h2>PYTHON</h2>

See <em><a href="http://grass.osgeo.org/grass74/manuals/libpython/">Python
Scripting Library</a></em> for more info.
<p>
Note: The Python tab in the <em>wxGUI</em> can be used for entering the
following code:
<p>
<div class="code"><pre>
import grass.script as gcore
    
gcore.vector_columns('geology')   # for `v.info -c`
gcore.vector_info_topo('geology') # for `v.info shell=topo`
</pre></div>

<h2>SEE ALSO</h2>

<em>
<a href="r.info.html">r.info</a>,
<a href="r3.info.html">r3.info</a>,
<a href="t.info.html">t.info</a>
</em>

<h2>AUTHOR</h2>

Original author CERL<br>
Updated to GRASS 6 by Radim Blazek, ITC-Irst, Trento, Italy<br>
Level 1 support by Markus Metz<br>
Updated to GRASS 7 by Martin Landa, CTU in Prague, Czech Republic

<p><i>Last changed: $Date$</i>