r.colors.stddev.1grass man page

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

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: 2014-12-19 22:55:37 +0100 (Fri, 19 Dec 2014) $

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GRASS 7.0.4 Grass User's Manual