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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 \
         out=watrcrsl_italy op=overlap

SEE ALSO

v.overlay, GRASS SQL interface

AUTHORS

Radim Blazek

Last changed: $Date: 2007-03-22 01:00:33 -0700 (Thu, 22 Mar 2007) $


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