GM_CalcAreaElevStats

Marius Lazar

September 02, 2026 13:43 Updated

Global Mapper SDK

Extracts some or all of a loaded raster/grid layer to a new layer by applying a resampler or convolution filter.

Syntax

C++

GM_DLL_EXPORTED GM_Error_t32 __stdcall GM_ApplyConvolutionFilter
(
GM_LayerHandle_t32                  aLayer,     // IN: Layer to extract and filter from
const GM_ConvolutionLayerSetup_t*   aSetup,     // IN: Options for operation
GM_LayerHandle_t32*                 aOutLayer,  // OUT: Filled with handle of newly created layer
void*                               aReserved   // IN: Reserved for future use, must be NULL
);