NAME

v.overlay - Overlay 2 vector maps.

SYNOPSIS

v.overlay
v.overlay help
v.overlay [-t] ainput=string [atype=string[,string,...]] [afield=integer] binput=string [btype=string[,string,...]] [bfield=integer] output=string [operator=string]

Flags:

-t
Do not create attribute table.

Parameters:

ainput=string
Name of input vector
atype=string
Select type: point, line, boundary, centroid or area
Options: line,area
Default: area
afield=integer
Field value
Default: 1
binput=string
Name of input vector
btype=string
Select type: point, line, boundary, centroid or area
Options: area
Default: area
bfield=integer
Field value
Default: 1
output=string
Name of output vector
operator=string
Operator defines features written to output vector. Feature is written to output if the result of operation 'ainput operator binput' is true. Input feature is considered to be true, if category of given field is defined.
and : also known as 'intersection' in GIS
or : also known as 'union' in GIS (only for atype=area)
not : features from ainput not overlayed by features from binput
xor : features from either ainput or binput but not those from ainput overlayed by binput (only for atype=area)
Options: and,or,not,xor
Default: or

DESCRIPTION

v.overlay allows the user to overlay to vector area maps. There are 3 links attached to features in output map,

NOTES

Currently only areas are supported!

EXAMPLE

v.overlay ainput=lake binput=province output=lakeXprovince

SEE ALSO

AUTHORS

Radim Blazek, ITC-Irst, Trento, Italy

Last changed: $Date: 2003/08/13 09:23:31 $


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