r.colors.stddev.1grass - Man Page
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
Figure: Standard deviations from mean elevation
See Also
r.colors, r.univar, v.colors
Author
Hamish Bowman, Dunedin, New Zealand
Source Code
Available at: r.colors.stddev source code (history)
Accessed: Tuesday Mar 19 11:02:38 2024
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