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 02:11:34 +0200 (Mon, 11 May 2015) $

Source Code

Available at: v.parallel source code (history)

Main index | Vector index | Topics index | Keywords index | Graphical index | Full index

© 2003-2017 GRASS Development Team, GRASS GIS 7.2.1 Reference Manual

Info

GRASS 7.2.1 Grass User's Manual