Created
June 21, 2018 13:46
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Find the distances between 2 location
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class Utils { | |
private double distance(double lat1, double lon1, double lat2, double lon2) { | |
// haversine great circle distance approximation, returns meters | |
double theta = lon1 - lon2; | |
double dist = Math.sin(deg2rad(lat1)) * Math.sin(deg2rad(lat2)) | |
+ Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) | |
* Math.cos(deg2rad(theta)); | |
dist = Math.acos(dist); | |
dist = rad2deg(dist); | |
// 60 nautical miles per degree of seperation | |
dist = dist * 60; | |
// 1852 meters per nautical mile | |
dist = dist * 1852; | |
return (dist); | |
} | |
private double deg2rad(double deg) { | |
return (deg * Math.PI / 180.0); | |
} | |
private double rad2deg(double rad) { | |
return (rad * 180.0 / Math.PI); | |
} | |
} |
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