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) $
Main index - vector index - Full index
© 2003-2008 GRASS Development Team