v.perturbgrass - Online in the Cloud

PROGRAM:

NAME

v.perturb - Random location perturbations of vector points.

KEYWORDS

vector, geometry, statistics, random, point pattern

SYNOPSIS

v.perturb
v.perturb --help
v.perturb [-b] input=name [layer=string] output=name [distribution=string]
parameters=float[,float,...] [minimum=float] [seed=integer] [--overwrite] [--help]
[--verbose] [--quiet] [--ui]

Flags:
-b
Do not build topology

--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

distribution=string
Distribution of perturbation
Options: uniform, normal
Default: uniform

parameters=float[,float,...] [required]
Parameter(s) of distribution
If the distribution is uniform, only one parameter, the maximum, is needed. For a
normal distribution, two parameters, the mean and standard deviation, are required.

minimum=float
Minimum deviation in map units
Default: 0.0

seed=integer
Seed for random number generation
Default: 0

DESCRIPTION

v.perturb reads a vector map of points and writes the same points but perturbs the
eastings and northings by adding either a uniform or normal delta value. Perturbation
means that a variating spatial deviation is added to the coordinates.

NOTES

The uniform distribution is always centered about zero. The associated parameter is
constrained to be positive and specifies the maximum of the distribution; the minimum is
the negation of that parameter. Do perturb into a ring around the center, the minimum
parameter can be used.

Usually, the mean (first parameter) of the normal distribution is zero (i.e., the
distribution is centered at zero). The standard deviation (second parameter) is naturally
constrained to be positive.

Output vector points are not guaranteed to be contained within the current geographic
region.

Use v.perturbgrass online using onworks.net services