GRASS GIS manual: r.colors.stddev

NAME

r.colors.stddev - Set color rules based on stddev from a raster map's mean value.

KEYWORDS

raster, color table

SYNOPSIS

r.colors.stddev
r.colors.stddev help
r.colors.stddev [-bz] map=name [--verbose] [--quiet]

Flags:

-b: Color using standard deviation bands
-z: Force center at zero
--verbose: Verbose module output
--quiet: Quiet module output

Parameters:

map=name: Name of raster map

DESCRIPTION

r.colors.stddev set raster map color rules based on standard deviations from a map's mean value, either as a continuous color gradient or in color bands per standard deviation from the mean.

With the color band option values less that 1 S.D. from the mean are colored green, within 1-2 S.D. are colored yellow, within 2-3 S.D. are colored red, and beyond 3 S.D. are colored black.

For a differences map there is an option to lock the center of the color table at zero. Values more than two S.D. below the mean will be colored blue; values below the mean but less than 2 S.D. away will transition to white, and above the mean the colors will simularly transition to full red at +2 S.D.

AUTHOR

Hamish Bowman
Dunedin, New Zealand

Last changed: $Date: 2008-12-04 02:00:41 -0800 (Thu, 04 Dec 2008) $

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