Declarationproperty EXIF_GPSTrackRef: AnsiString;
Returns the reference for the direction of GPS receiver movement
. "T" denotes true direction and "M" is magnetic direction.
Default value is empty string, which means "unknown". An unknown value is not written when saving EXIF values.
Note: To save GPS data, you must set EXIF_GPSVersionID
to '184.108.40.206' (or use the const, GPS_Version_ID