Note: This document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade, and read the current manual page.
NAME
r.pi.enn.pr - Patch relevance for Euclidean Nearest Neighbor patches.
KEYWORDS
raster,
landscape structure analysis,
patch index
SYNOPSIS
r.pi.enn.pr
r.pi.enn.pr --help
r.pi.enn.pr [-a] input=name output=name keyval=integer method=string statmethod=string [title="phrase"] [--overwrite] [--help] [--verbose] [--quiet] [--ui]
Flags:
- -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
- --ui
- Force launching GUI dialog
Parameters:
- 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.
- Options: distance, area
- statmethod=string [required]
- Statistical method to perform on differences.
- Options: sum, average
- title="phrase"
- Title for resultant raster map
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.
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)
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
r.pi.index,
r.pi.enn,
r.pi.fnn,
r.pi.searchtime.pr,
r.pi
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: Tuesday Sep 19 09:59:22 2023 in commit: e76c325998c8cd9053ce012a5adbb79f33ab0779
Note: This document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade, and read the current manual page.
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© 2003-2023
GRASS Development Team,
GRASS GIS 8.2.2dev Reference Manual