GM_GetProjectionValues – Global Mapper

Global Mapper SDK

Retrieves all the defining parameters from a GM_Projection_t structure by feeding its JSON definition into GeoCalc.

Syntax

C++

GM_Error_t32 GM_GetProjectionValues(
    const GM_Projection_t* aProj,           // IN: Projection to get values from
    char* aHorizontalCRSCode,               // OUT: GC code of Horizontal Coordinate System
    char* aVerticalCRSCode,                 // OUT: GC code of Vertical Coordinate System
    char* aHorizontalUnitCode,              // OUT: GC code of Horizontal Unit
    char* aVerticalUnitCode,                // OUT: GC code of Vertical Unit
    char* aTargetHorizontalCRSCode,         // OUT: GC code of Target Horizontal Coordinate System
    char* aTargetVerticalCRSCode,           // OUT: GC code of Target Vertical Coordinate System
    double* aSourceEpoch,                   // OUT: Epoch for CRS
    double* aTargetEpoch,                   // OUT: Epoch for target CRS
    double* aCentralLongitude,              // OUT: Central meridian for CRS (0 = Greenwich)
    GM_CoordTransform_t* aCoordTransform    // OUT: The coord transform that is used between the source and target CRS (Use GM_FreeCoordTransform to free this)
 );

Remarks

All the code strings can be left empty besides the horizontal.