WRAPPER_API bool GetDeclination(AngularValue& declination, const GeodeticPoint& location, double& date)
declination
The passed back magnetic declination
location
The location at which to compute the declination
date
The time at which to compute the declination, in decimal years.
Computes the magnetic declination at the specified location and time. Returns true if successfull. Note: the date is in decimal years.