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.
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.neighbours and r.covar.
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
g.region rast=elevation -p
r.pi.corr.mw input1=slope input2=elevation output=corrwin1 size=7 max=10000
r.colors corrwin1 col=bgyr
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
Last changed: $Date$