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Revision: 33850
at October 14, 2010 07:25 by rnickel
Initial Code 
public double calculateDistance(double lat1, double lon1, double lat2, double lon2)
    {       
        try{
            double R = 6371; // km
            
            double dlat = Math.toRadians(lat2 - lat1);
            double dlong = Math.toRadians(lon2 - lon1);
                        
            double a = Math.sin(dlat / 2.0) * Math.sin(dlat / 2.0) +
                        Math.cos(Math.toRadians(lat1)) * Math.cos(Math.toRadians(lat2))  *
                        Math.sin(dlong / 2.0) * Math.sin(dlong / 2.0);
            double num2 = Math.sqrt(a);
            double num1 = Math.sqrt(1-a);
            double c = 2 * MathUtilities.atan2(Math.sqrt(a), Math.sqrt(1-a));
            double d = R * c;
    
            return d;
    
        } catch(Exception e){
            e.printStackTrace();
        }
        return 0;
    }
Initial URL 
http://www.ryannickel.com/2010/10/how-to-calculate-the-distance-between-two-latlon-points-on-the-blackberry/
Initial Description 
Yes, I realize that this won't work with j2me, but RIM has implemented some good helper classes to make this calculation much easier.

This calculation uses the Haversine formula.
Initial Title 
How to calculate the distance between two lat/lon points on the blackberry
Initial Tags 

                                

                                                            

                                    

                                        

                                        Initial Language
                                        

                                    

                                    
Java