Note: This document is for an older version of GRASS GIS that has been discontinued. You should upgrade, and read the current manual page.

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NAME

r.pi.graph.red - Graph Theory - decreasing distance threshold option.

KEYWORDS

raster, landscape structure analysis, connectivity analysis

SYNOPSIS

r.pi.graph.red
r.pi.graph.red --help
r.pi.graph.red [-a] input=name output=string keyval=integer distance=float step=float neighborhood=string index=string[,string,...] stats=string [--help] [--verbose] [--quiet] [--ui]

Flags:

-a
Set for 8 cell-neighbors. 4 cell-neighbors are default
--help
Print usage summary
--verbose
Verbose module output
--quiet
Quiet module output
--ui
Force launching GUI dialog

Parameters:

input=name [required]
Name of input raster map
output=string [required]
Name of the output ASCII file
keyval=integer [required]
Key value
distance=float [required]
Distance at which to begin decreasing
step=float [required]
Step to decrease the distance
neighborhood=string [required]
Neighborhood definition
Options: nearest_neighbor, relative_neighbor, gabriel, spanning_tree
index=string[,string,...] [required]
Cluster index
Options: connectance_index, gyration_radius, cohesion_index, percent_patches, percent_area, number_patches, number_links, mean_patch_size, largest_patch_size, largest_patch_diameter, graph_diameter
stats=string [required]
Statistical method to perform on the values
Options: average, median, variance, std_deviat, min, max

Table of contents

DESCRIPTION

Graph Theory - decreasing distance threshold option.

NOTES

...

EXAMPLE

An example for the North Carolina sample dataset: 
g.region -d
...

SEE ALSO

r.pi.corearea, r.pi.corr.mw, r.pi.csr.mw, r.pi.export, r.pi.graph, r.pi.graph.dec, r.pi.graph.pr, r.pi.grow, r.pi.import, r.pi.index, r.pi.lm, r.pi.odc, r.pi.prob.mw, r.pi.rectangle, r.pi

AUTHORS

Programming: Elshad Shirinov
Scientific concept: Dr. Martin Wegmann
Department of Remote Sensing
Remote Sensing and Biodiversity Unit
University of Wuerzburg, Germany

Port to GRASS GIS 7: Markus Metz

SOURCE CODE

Available at: r.pi.graph.red source code (history)

Latest change: Tuesday Sep 19 09:59:22 2023 in commit: e76c325998c8cd9053ce012a5adbb79f33ab0779

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© 2003-2024 GRASS Development Team, GRASS GIS 8.3.3dev Reference Manual