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Note: This addon document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade your GRASS GIS installation, and read the current addon manual page.

NAME

r.pi.corr.mw - Moving window correlation analysis.

KEYWORDS

raster

SYNOPSIS

r.pi.corr.mw
r.pi.corr.mw --help
r.pi.corr.mw input1=name input2=name output=name size=integer max=integer [title="phrase"] [--overwrite] [--help] [--verbose] [--quiet] [--ui]

Flags:

--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:

input1=name [required]
Name of input raster map
input2=name [required]
Name of input raster map
output=name [required]
Name for output raster map
size=integer [required]
Neighborhood size
Options: 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25
max=integer [required]
In order to receive more information of the decimal places, set it to e.g. 1000
title="phrase"
Title for resultant raster map

Table of contents

DESCRIPTION

r.pi.corr.mw provides information concerning the correlation of pixels inside a moving window between two raster files.

It calculates correlation of two raster maps by calculating correlation function of two corresponding rectangular areas for each raster point and writing the result into a new raster map.

NOTES

This module computes the correlation between two raster files but unlike r.pi.lm for moving windows of a specific size. This module is partly based on r.neighbors and r.covar.

EXAMPLE

An example for the North Carolina sample dataset: Correlation of all pixels within a 7x7 sized window of two rasters (elevation and slope). The output is multiplied by 10000 for higher precision
g.region rast=elevation -p
r.pi.corr.mw input1=slope input2=elevation output=corrwin1 size=7 max=10000
r.colors corrwin1 col=bgyr

SEE ALSO

r.pi.index, r.pi.lm, 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.corr.mw source code (history)

Latest change: Mon Jun 28 07:54:09 2021 in commit: 1cfc0af029a35a5d6c7dae5ca7204d0eb85dbc55


Note: This addon document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade your GRASS GIS installation, and read the current addon manual page.

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© 2003-2022 GRASS Development Team, GRASS GIS 7.8.8dev Reference Manual