r.pi.enn.pr

Patch relevance for Euclidean Nearest Neighbor patches.

r.pi.enn.pr [-a] input=name output=name keyval=integer method=string statmethod=string [title="phrase"] [--overwrite] [--verbose] [--quiet] [--qq] [--ui]

Example:

r.pi.enn.pr input=name output=name keyval=integer method=string statmethod=string

grass.script.run_command("r.pi.enn.pr", input, output, keyval, method, statmethod, title=None, flags=None, overwrite=False, verbose=False, quiet=False, superquiet=False)

Example:

gs.run_command("r.pi.enn.pr", input="name", output="name", keyval=integer, method="string", statmethod="string")

Parameters

Command linePython (grass.script)

input=name [required]
    Name of input raster map
output=name [required]
    Name for output raster map
keyval=integer [required]
    Key value of patches in the input file
method=string [required]
    Aspect of the nearest patch to use.
    Allowed values: distance, area
statmethod=string [required]
    Statistical method to perform on differences.
    Allowed values: sum, average
title="phrase"
    Title for resultant raster map
-a
    Set for 8 cell-neighbors. 4 cell-neighbors are default
--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 raster map
    Used as: input, raster, name
output : str, required
    Name for output raster map
    Used as: output, raster, name
keyval : int, required
    Key value of patches in the input file
method : str, required
    Aspect of the nearest patch to use.
    Allowed values: distance, area
statmethod : str, required
    Statistical method to perform on differences.
    Allowed values: sum, average
title : str, optional
    Title for resultant raster map
    Used as: "phrase"
flags : str, optional
    Allowed values: a
    a
        Set for 8 cell-neighbors. 4 cell-neighbors are default
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

Patch relevance for Euclidean Nearest Neighbor patches.

r.pi.enn.pr computes distance and area differences for the first NN after removal of patch i.

NOTES

The keyval operator determines which category value is taken for the Patch Index analysis.

The method operators determine what measure is applied on the nth NN (area or distance).

Differences of distance/area after removal of patch i are provided as output as well as the amount of patches to be affected by its removal (percent) (PP) and the amount of area in these patches (PA - Percent Area)

EXAMPLE

An example for the North Carolina sample dataset:

Analysing the differences (average) in distance when patch i of class 5 is removed:

r.pi.enn.pr input=landclass96 output=dist_iter keyval=5 method=distance statmethod=average

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.enn.pr source code (history)
Latest change: Thursday Feb 20 13:02:26 2025 in commit 53de819