1r.what.color(1) Grass User's Manual r.what.color(1)
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6 r.what.color - Queries colors for a raster map layer.
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9 raster, querying, color table
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12 r.what.color
13 r.what.color --help
14 r.what.color [-i] input=string [value=float[,float,...]] [for‐
15 mat=string] [--help] [--verbose] [--quiet] [--ui]
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17 Flags:
18 -i
19 Read values from stdin
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21 --help
22 Print usage summary
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24 --verbose
25 Verbose module output
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27 --quiet
28 Quiet module output
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30 --ui
31 Force launching GUI dialog
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33 Parameters:
34 input=string [required]
35 Name of existing raster map to query colors
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37 value=float[,float,...]
38 Values to query colors for
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40 format=string
41 Output format (printf-style)
42 Default: %d:%d:%d
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45 r.what.color outputs the color associated with user-specified category
46 values in a raster input map.
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48 Values may be specified either using the values= option, or by specify‐
49 ing the -i flag and passing the values on stdin, one per line.
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51 For each value which is specified, a line of output will be generated
52 consisting of the category value followed by the color, e.g.:
53 r.what.color input=elevation.dem value=1500
54 1500: 223:127:31
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56 If the input map is an integer (CELL) map, the category will be written
57 as an integer (no decimal point), otherwise it will be written in
58 floating point format (printf("%.15g") format).
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60 If the lookup fails for a value, the color will be output as an aster‐
61 isk, e.g.:
62 r.what.color input=elevation.dem value=9999
63 9999: *
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65 If a value cannot be parsed, both the value and the color will be out‐
66 put as an asterisk, e.g.:
67 r.what.color input=elevation.dem value=bogus
68 *: *
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70 The format can be changed using the format= option. The value should be
71 a printf()-style format string containing three conversion specifiers
72 for the red, green and blue values respectively, e.g.:
73 r.what.color input=elevation.dem value=1500 format=’%02x:%02x:%02x’
74 1500: df:7f:1f
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76 If your system supports the %m$ syntax, you can change the ordering of
77 the components, e.g.:
78 r.what.color input=elevation.dem value=1500 format=’%3$02x:%2$02x:%1$02x’
79 1500: 1f:7f:df
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81 Common formats:
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83 · Tcl/Tk: format="#%02x%02x%02x"
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85 · WxPython: format=’"#%02x%02x%02x"’ or format=’"(%d,%d,%d)"’
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88 r.what
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91 Glynn Clements
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94 Available at: r.what.color source code (history)
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96 Main index | Raster index | Topics index | Keywords index | Graphical
97 index | Full index
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99 © 2003-2019 GRASS Development Team, GRASS GIS 7.8.2 Reference Manual
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103GRASS 7.8.2 r.what.color(1)