NAME

v.parallel - Creates parallel line to input vector lines.

KEYWORDS

vector, geometry, buffer, line

SYNOPSIS

v.parallel
v.parallel --help
v.parallel [-rb] input=name [layer=string] output=name distance=float [minordistance=float] [angle=float] side=string [tolerance=float] [--overwrite] [--help] [--verbose] [--quiet] [--ui]

Flags:

-r: Make outside corners round
-b: Create buffer-like parallel lines
--overwrite: Allow output files to overwrite existing files
--help: Print usage summary
--verbose: Verbose module output
--quiet: Quiet module output
--ui: Force launching GUI dialog

Parameters:

input=name [required]: Name of input vector map
Or data source for direct OGR access
layer=string: Layer number or name (’-1’ for all layers)
A single vector map can be connected to multiple database tables. This number determines which table to use. When used with direct OGR access this is the layer name.
Default: -1
output=name [required]: Name for output vector map
distance=float [required]: Offset along major axis in map units
Options: 0-100000000
minordistance=float: Offset along minor axis in map units
Options: 0-100000000
angle=float: Angle of major axis in degrees
Default: 0
side=string [required]: Side
Options: left, right, both
Default: right
left: Parallel line is on the left
right: Parallel line is on the right
both: Parallel lines on both sides
tolerance=float: Tolerance of arc polylines in map units
Options: 0-100000000

DESCRIPTION

v.parallel creates parallel lines to the input vector lines which can be used as half-buffers.

NOTES

Usage of -b flag will overrule the side parameter.

KNOWN ISSUES

There is a problem with side-offset parallel line generation for inside corners. To avoid this problem, the -b flag might be used.

AUTHORS

Radim Blazek
Rewritten by Rosen Matev (with support through the Google Summer of Code program 2008)

SOURCE CODE

Available at: v.parallel source code (history)