Python distance calculation example based on latitude and longitude

This article describes how to calculate the distance between two points based on the latitude and longitude of python. For more information, see The code is as follows:

/**
* Calculate the distance between two points
* @ Param _ lat1-start latitude
* @ Param _ lon1-start longitude
* @ Param _ lat2-end latitude
* @ Param _ lon2-end longitude
* @ Return km (rounding)
*/
Public static double getDistance (double _ lat1, double _ lon1, double _ lat2, double _ lon2 ){
Double lat1 = (Math. PI/180) * _ lat1;
Double lat2 = (Math. PI/180) * _ lat2;

Double lon1 = (Math. PI/180) * _ lon1;
Double lon2 = (Math. PI/180) * _ lon2;

// Earth radius
Double R = 6378.1;

Double d = Math. acos (Math. sin (lat1) * Math. sin (lat2) + Math. cos (lat1) * Math. cos (lat2) * Math. cos (lon2-lon1) * R;

Return new BigDecimal (d). setScale (4, BigDecimal. ROUND_HALF_UP). doubleValue ();
}

Public static void main (String [] args ){
System. out. println (getDistance (45.73990, 126.55893, 45.73876, 126.55037 ));
}