Map and Table Calculation

CLRGREY( ) function

Returns the Grey component of an (R,G,B) color.

Syntax

CLRGREY(Color)

Input

Color is a map or a column with the Color domain or a picture domain, or an expression which results in a color
Domain type: system domain Color or a Picture domain

Output

CLRGREY returns: a value
Domain: system domain Image

Notes:

Tips:

Usable in

MapCalc, TabCalc, Simple calculators

Examples

Pocket line calculator example:

? CLRGREY(RPRCOLOR(Landuse,"Airport")

returns the grey component of class "Airport" from representation Landuse, e.g. 77

TabCalc example:

Grey = CLRGREY(Color)

 

Landunit

Colorname

Color

Grey

Agriculture

Yellow

(255, 255, 0)

227

Airport

Red

(255, 0, 0)

77

Bare soils

Brown

(164, 40, 40)

77

Forest

Forest Green

(48, 128, 76)

98

Grass

Yellow Green

(98, 98, 98)

98

Lake

Blue

(0, 0, 255)

28

Riverbed

Cyan

(0, 255, 255)

179

Rocks

Gray

(128, 128, 128)

128

Shrubs

Magenta

(255, 0, 255)

105

MapCalc example:

LandColor = MAPCOLOR(Landuse)

Grey = CLRGREY(LandColor)

 

Landuse

LandColor

Grey

Forest Forest Rocks
Shrubs Lake Grass
? Grass Airport
(48,128,76) (48,128,76) (128,128,128)
(255,0,255) (0,0,255) (98,98,98)
(0,0,0) (98,98,98) (255,0,0)
98 98 128
105 28 98
0 98 77

See also:

COLOR CLRGREEN CLRYELLOW CLRHUE
MAPCOLOR CLRBLUE CLRMAGENTA CLRSAT
RPRCOLOR CLRCYAN CLRINTENS
    CLRGREY COLORHSI