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v.select

NAME

v.select - Select features from ainput by features from binput

KEYWORDS

vector

SYNOPSIS

v.select
v.select help
v.select [-t] ainput=name [atype=string[,string,...]] [alayer=integer] binput=name [btype=string[,string,...]] [blayer=integer] output=name [operator=string] [--overwrite] [--verbose] [--quiet]

Flags:

-t

Do not create attribute table

--overwrite

Allow output files to overwrite existing files

--verbose

Verbose module output

--quiet

Quiet module output

Parameters:

ainput=name

Name of input vector map

atype=string[,string,...]

Type
Feature type(s)
Options: point,line,boundary,centroid,area
Default: point,line,boundary,centroid,area

alayer=integer

Layer number
A single vector map can be connected to multiple database tables. This number determines which table to use.
Default: 1

binput=name

Name of input vector map

btype=string[,string,...]

Type
Feature type(s)
Options: point,line,boundary,centroid,area
Default: point,line,boundary,centroid,area

blayer=integer

Layer number
A single vector map can be connected to multiple database tables. This number determines which table to use.
Default: 1

output=name

Name for output vector map

operator=string

Operator defines required relation between features. A feature is written to output if the result of operation 'ainput operator binput' is true. An input feature is considered to be true, if category of given layer is defined.
        overlap: features partially or completely overlap

Options: overlap
Default: overlap

DESCRIPTION

v.select allows the user to select features from a vector by features from another one.

NOTES

EXAMPLES

Extract forest fire points from larger fire map:
v.select ainput=fire binput=forest output=forest_fire

Extract Italian rivers from VMAP0 watercourses map:
v.select ain=watrcrsl_eurnasia_wgs84 bin=italy_area rs

         out=watrcrsl_italy op=overlap

SEE ALSO

v.overlay, GRASS SQL interface

AUTHORS

Radim Blazek

Last changed: $Date: 2007-03-22 09:00:33 +0100 (Thu, 22 Mar 2007) $

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© 2003-2008 GRASS Development Team