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2014/10/15 ¤U¤È 10:07:11
iphone Programming Glossary: dlathttp://stackoverflow.com/questions/5988590/how-to-calculate-the-current-speed-and-average-speed-of-user-travelling-from-cur 180 lat2 oldLocation.coordinate.latitude M_PI 180 lon2 oldLocation.coordinate.longitude M_PI 180 float R 6371 km float dLat lat2 lat1 float dLon lon2 lon1 float a sin dLat 2 sin dLat 2 cos lat1 cos lat2 sin dLon 2 sin dLon 2 float c 2 atan2 sqrt.. lon2 oldLocation.coordinate.longitude M_PI 180 float R 6371 km float dLat lat2 lat1 float dLon lon2 lon1 float a sin dLat 2 sin dLat 2 cos lat1 cos lat2 sin dLon 2 sin dLon 2 float c 2 atan2 sqrt a sqrt 1 a float d R c NSLog @ Kms f d return.. M_PI 180 float R 6371 km float dLat lat2 lat1 float dLon lon2 lon1 float a sin dLat 2 sin dLat 2 cos lat1 cos lat2 sin dLon 2 sin dLon 2 float c 2 atan2 sqrt a sqrt 1 a float d R c NSLog @ Kms f d return d float getDistanceInMiles..
How to get angle between two POI? http://stackoverflow.com/questions/6140045/how-to-get-angle-between-two-poi float greatCircleFrom CLLocation first to CLLocation second int radius 6371 6371km is the radius of the earth float dLat second.coordinate.latitude first.coordinate.latitude float dLon second.coordinate.longitude first.coordinate.longitude float.. first.coordinate.latitude float dLon second.coordinate.longitude first.coordinate.longitude float a pow sin dLat 2 2 cos first.coordinate.latitude cos second.coordinate.latitude pow sin dLon 2 2 float c 2 atan2 sqrt a sqrt 1 a float..
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