Map and Table Calculation

MAPVALUE( ) function

Returns the value, class, or ID of a map Map at a certain (X,Y) Coordinate.

Syntax

MAPVALUE(Map, Coordinate)

Input

Output

Notes:

• By default this function works on raster maps with extension .mpr; you can omit the extension .mpr. To use this function on a polygon map, a segment map or a point map, you need to specify the object's extension (.mpa, .mps or .mpp).
• The coordinate system of Coordinate is automatically transformed to the coordinate system of Map if Coordinate and Map do not have the same coordinate system.

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 example:

TabCalc examples:

LanduseVal=MAPVALUE(Landuse,Coordinate)

Tmb1Val=MAPVALUE(Tmb1,Coordinate)

Notes:

• Column Coordinate uses coordinate system Cochabamba as domain.
• See How to calculate a cross-section through the terrain for more useful examples.

See also: