v.parallel.1grass man page

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.

See Also

v.buffer

Authors

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

Last changed: $Date: 2015-05-11 02:16:13 +0200 (Mon, 11 May 2015) $

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