NAME¶
r.colors.stddev - Set color rules based on stddev from a map's
mean value.
KEYWORDS¶
raster, color table
SYNOPSIS¶
r.colors.stddev
r.colors.stddev help
r.colors.stddev [-
bz]
input=
name [--
verbose]
[--
quiet]
Flags:¶
- -b
-
Color using standard deviation bands
- -z
-
Force center at zero
- --verbose
-
Verbose module output
- --quiet
-
Quiet module output
Parameters:¶
- input=name
-
Name of input 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 rast=elevation -p
r.colors.stddev elevation
SEE ALSO¶
r.colors, r.univar, v.colors
AUTHOR¶
Hamish Bowman,
Dunedin, New Zealand
Last changed: $Date: 2011-09-04 15:23:30 +0200 (Sun, 04 Sep 2011) $
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