GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages
v.db.addcolumn(1) Grass User's Manual v.db.addcolumn(1)

v.db.addcolumn - Adds one or more columns to the attribute table connected to a given vector map.

vector, attribute table, database

v.db.addcolumn
 
v.db.addcolumn --help
 
v.db.addcolumn map=name [layer=string] columns= name type[,name type,...] [--help] [--verbose] [-- quiet] [--ui]

--help
 
Print usage summary
--verbose
 
Verbose module output
--quiet
 
Quiet module output
--ui
 
Force launching GUI dialog

map=name [required]
 
Name of vector map
 
Or data source for direct OGR access
layer=string
 
Layer number where to add column(s)
 
Vector features can have category values in different layers. This number determines which layer to use. When used with direct OGR access this is the layer name.
 
Default: 1
columns=name type[,name type,...] [required]
 
Name and type of the new column(s) (’name type [,name type, ...]’)
 
Types depend on database backend, but all support VARCHAR(), INT, DOUBLE PRECISION and DATE. Example: ’label varchar(250), value integer’

v.db.addcolumn adds one or more column(s) to the attribute table connected to a given vector map. It automatically checks the connection for the specified layer.

v.db.addcolumn is a front-end to db.execute to allow easier usage. The supported types of columns depend on the database backend. However, all backends should support VARCHAR, INT, DOUBLE PRECISION and DATE.
The existing database connection(s) can be verified with v.db.connect.

Adding a single column:
 
 
g.copy vect=roadsmajor,myroads
v.db.addcolumn myroads columns="slope double precision"
v.info -c myroads
Adding two columns:
 
 
g.copy vect=roadsmajor,myroads
v.db.addcolumn myroads columns="slope double precision,myname varchar(15)"
v.info -c myroads

db.connect, db.execute, v.db.addtable, v.db.connect, v.db.dropcolumn, v.db.droptable, v.db.select, v.db.update
 
GRASS SQL interface

Moritz Lennert (mlennert@club.worldonline.be)
Last changed: $Date: 2011-11-08 22:24:20 +0100 (Tue, 08 Nov 2011) $

Available at: v.db.addcolumn source code (history)
Main index | Vector index | Topics index | Keywords index | Graphical index | Full index
© 2003-2018 GRASS Development Team, GRASS GIS 7.4.3 Reference Manual
GRASS 7.4.3

Search for    or go to Top of page |  Section 1 |  Main Index

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with ManDoc.