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: 2016-05-16 12:06:50 +0200 (Mon, 16 May 2016) $

Source Code

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

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