GM_GenerateAreasFromEqualValues

Marius Lazar

September 02, 2026 13:43 Updated

Global Mapper SDK

Create a new layer with areas for regions of the same (or similar) color, elevation, or slope values from a loaded raster or elevation layer. The operation is mirrored in Script function GENERATE_EQUAL_VAL_AREAS.

Syntax

C++

Copy

GM_DLL_EXPORTED GM_Error_t32 __stdcall GM_GenerateAreasFromEqualValues
    ( 
    GM_LayerHandle_t32          aLayer,         // IN: Layer to get elevations / colors from
    GM_EqualValueAreaSetup_t*   aSetup,          // IN: Function parameters
    GM_LayerHandle_t32*         aCreatedLayer   // OUT: Created layer
    );