public static LatLonPoint sircumCenter(LatLonPoint a, LatLonPoint b, LatLonPoint c) {
LatLonPoint result = new LatLonPoint();
double a1 = b.Latitude - a.Latitude;
double b1 = b.longitude - a.longitude;
double c1 = (Math.pow(a1, 2) + Math.pow(b1, 2)) / 2;
double a2 = c.Latitude - a.Latitude;
double b2 = c.longitude - a.longitude;
double c2 = (Math.pow(a2, 2) + Math.pow(b2, 2)) / 2;
double d = a1 * b2 - a2 * b1;
result.Latitude = a.Latitude + (c1 * b2 - c2 * b1) / d;
result.longitude = a.longitude + (a1 * c2 - a2 * c1) / d;
return result;
}
public static LatLonPoint gravityCenter(LatLonPoint a, LatLonPoint b, LatLonPoint c) {
LatLonPoint center = new LatLonPoint();
center.Latitude = (a.Latitude + b.Latitude + c.Latitude) / 3;
center.longitude = (a.longitude + b.longitude + c.longitude) / 3;
return center;
};