v.parallel
Creates parallel line to input vector lines.
v.parallel [-rb] input=name [layer=string] output=name distance=float [minordistance=float] [angle=float] side=string [tolerance=float] [--overwrite] [--verbose] [--quiet] [--qq] [--ui]
Example:
v.parallel input=name output=name distance=float side=right
grass.script.run_command("v.parallel", input, layer="-1", output, distance, minordistance=None, angle=0, side="right", tolerance=None, flags=None, overwrite=False, verbose=False, quiet=False, superquiet=False)
Example:
gs.run_command("v.parallel", input="name", output="name", distance=float, side="right")
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
Allowed values: 0-100000000
minordistance=float
Offset along minor axis in map units
Allowed values: 0-100000000
angle=float
Angle of major axis in degrees
Default: 0
side=string [required]
Side
Allowed values: 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
Allowed values: 0-100000000
-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
--qq
Very quiet module output
--ui
Force launching GUI dialog
input : str, required
Name of input vector map
Or data source for direct OGR access
Used as: input, vector, name
layer : str, optional
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.
Used as: input, layer
Default: -1
output : str, required
Name for output vector map
Used as: output, vector, name
distance : float, required
Offset along major axis in map units
Allowed values: 0-100000000
minordistance : float, optional
Offset along minor axis in map units
Allowed values: 0-100000000
angle : float, optional
Angle of major axis in degrees
Default: 0
side : str, required
Side
Allowed values: left, right, both
left: Parallel line is on the left
right: Parallel line is on the right
both: Parallel lines on both sides
Default: right
tolerance : float, optional
Tolerance of arc polylines in map units
Allowed values: 0-100000000
flags : str, optional
Allowed values: r, b
r
Make outside corners round
b
Create buffer-like parallel lines
overwrite: bool, optional
Allow output files to overwrite existing files
Default: False
verbose: bool, optional
Verbose module output
Default: False
quiet: bool, optional
Quiet module output
Default: False
superquiet: bool, optional
Very quiet module output
Default: False
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
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)
Latest change: Friday Feb 07 19:16:09 2025 in commit a82a39f