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v.parallel(1) Grass User's Manual v.parallel(1)

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

vector, geometry, buffer, line

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]

-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

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

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

Usage of -b flag will overrule the side parameter.

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

v.buffer

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) $

Available at: v.parallel source code (history)
Main index | Vector index | Topics index | Keywords index | Graphical index | Full index
© 2003-2018 GRASS Development Team, GRASS GIS 7.4.3 Reference Manual
GRASS 7.4.3

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