GM_CombineAreas

Marius Lazar

September 02, 2026 13:40 Updated

Global Mapper SDK

Combines the given list of areas into one or more new area features and adds the new area to the given layer. Any areas that touch or overlap should be combined.

Syntax

C++

Copy

GM_Error_t32 __stdcall GM_CombineAreas
(
const GM_AreaFeature_t**    aAreaList,      // IN: List of areas to combine
uint32                      aNumAreas,      // IN: Number of areas in aAreaList
const GM_Projection_t*      aAreaProj,      // IN: Projection system the area coordinates are in (use NULL for current projection)
GM_LayerHandle_t32          aNewAreaLayer   // IN: Layer to add new combined areas to
)