kurosen
codding
Posts : 198
Join date : 2012-04-17
 | | Subject: java convert coordinates to meters Mon Mar 23, 2020 10:16 am | |
| function : - Code:
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public static Double measure(double lat1, double lon1, double lat2, double lon2) { // generally used geo measurement
// function
double R = 6378.137; // Radius of earth in KM
double dLat = lat2 * Math.PI / 180 - lat1 * Math.PI / 180;
double dLon = lon2 * Math.PI / 180 - lon1 * Math.PI / 180;
double a = Math.sin(dLat / 2) * Math.sin(dLat / 2) + Math.cos(lat1 * Math.PI / 180)
* Math.cos(lat2 * Math.PI / 180) * Math.sin(dLon / 2) * Math.sin(dLon / 2);
double c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
double d = R * c;
return d * 1000; // meters
} function in kotlin vertion : - Code:
-
fun measure(lat1:Double, lon1:Double, lat2:Double, lon2:Double):Double { // generally used geo measurement
// function
val R = 6378.137 // Radius of earth in KM
val dLat = lat2 * Math.PI / 180 - lat1 * Math.PI / 180
val dLon = lon2 * Math.PI / 180 - lon1 * Math.PI / 180
val a = (Math.sin(dLat / 2) * Math.sin(dLat / 2) + (Math.cos(lat1 * Math.PI / 180)
* Math.cos(lat2 * Math.PI / 180) * Math.sin(dLon / 2) * Math.sin(dLon / 2)))
val c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a))
val d = R * c
return d * 1000 // meters
} use example : get the distance from Pripyat city to Chernobyl power plant respectively: System.out.println(measure(51.4045, 30.0542, 51.2763, 30.2219)); output : 18430.034150242464 about 18km // not great not terrible  | |
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