GM_CalcDistance

Calculates the great-circle distance in meters between two points. The points can either be specified as lat/lon values or in the current projection.

Syntax

C++
Copy 
GM_Error_t32 GM_CalcDistance
(
double  aFromX,     // IN: start X/longitude coordinate
double  aFromY,     // IN: start Y/latitude coordinate
double  aToX,       // IN: stop X/longitude coordinate
double  aToY,       // IN: stop Y/latitude coordinate
boolean aLatLon,    // IN: TRUE - coordinates are lat/lon, FALSE - coordaintes are in the current projection?
double* aDist       // OUT: distance in meters between the points
);