Map and Table Calculation

MAPMAX( ) function

Returns the maximum value of a value map.

Syntax

MAPMAX(ValueMap)

Input

Output

Note:

By default, this function works on raster maps with extension .mpr; you can omit the extension .mpr. To use this function on polygon maps, segment maps or point maps, you need to specify the object's extension (.mpa, .mps or .mpp).

Tips:

• This function may be handy to use in DDE applications.
• When the definition symbol = is used, a dependent output map or dependent output column is created; when the assignment symbol := is used, the dependency link is immediately broken after the output map/column has been calculated.

Usable in

Simple calculators, MapCalc, TabCalc

Examples

Pocket line calculator examples:

MapCalc example:

OutMap = MAPMAX(InMap)

OutMap1 = InMap1 >= 0.75 * MAPMAX(InMap1)

OutMap1 uses the Bool domain and displays True only for the values between 75 and 100% of the maximum value of InMap1. The rest of the pixels are assigned False. In this example the maximum of InMap1 is 40 and only for values larger than or equal to 30 the statement is true.

TabCalc example:

OutCol = InCol + MAPMAX(InMap)

See also: