GRASS logo

NAME

r.colors.stddev - Sets 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 [--help] [--verbose] [--quiet] [--ui]

Flags:

-b
Color using standard deviation bands
-z
Force center at zero
--help
Print usage summary
--verbose
Verbose module output
--quiet
Quiet module output
--ui
Force launching GUI dialog

Parameters:

map=name [required]
Name of raster map

Table of contents

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 (S.D.) 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.

EXAMPLE

North Carolina sample dataset location:
g.region raster=elevation -p
r.colors.stddev elevation

SEE ALSO

r.colors, r.univar, v.colors

AUTHOR

Hamish Bowman, Dunedin, New Zealand

Last changed: $Date: 2016-05-16 03:06:50 -0700 (Mon, 16 May 2016) $

SOURCE CODE

Available at: r.colors.stddev source code (history)


Main index | Raster index | Topics index | Keywords index | Graphical index | Full index

© 2003-2017 GRASS Development Team, GRASS GIS 7.5.svn Reference Manual