Find center geopoint between start geo point and end geo point on android

Question

I have start latitude, longitude and end latitude,longitude.

I find Geo Point using latitude and longitude.

After that i draw line between the two Geo points

Answer 1

You can use Haversine formula snippet and checked with this page

public static void midPoint(double lat1,double lon1,double lat2,double lon2){

double dLon = Math.toRadians(lon2 - lon1);

//convert to radians
lat1 = Math.toRadians(lat1);
lat2 = Math.toRadians(lat2);
lon1 = Math.toRadians(lon1);

double Bx = Math.cos(lat2) * Math.cos(dLon);
double By = Math.cos(lat2) * Math.sin(dLon);
double lat3 = Math.atan2(Math.sin(lat1) + Math.sin(lat2), Math.sqrt((Math.cos(lat1) + Bx) * (Math.cos(lat1) + Bx) + By * By));
double lon3 = lon1 + Math.atan2(By, Math.cos(lat1) + Bx);

//print out in degrees
System.out.println(Math.toDegrees(lat3) + " " + Math.toDegrees(lon3));
}

Answer 2

The checked solution does not work for me.

Anyway, i have found an easiest solution :

   private GeoPoint midPoint(double lat1,double lon1,double lat2,double lon2){
        //create origin geopoint from parameters
        GeoPoint origin = new GeoPoint(lat1,lon1);
        //create destination geopoints from parameters
        GeoPoint destination = new GeoPoint(lat2,lon2);
        //calculate and return center
        return GeoPoint.fromCenterBetween(origin, destination);
    }

If you have origin and destination as GeoPoint, you can use directly "GeoPoint.fromCenterBetween" method.

Answer 3

You can approximate the midpoint by taking the average of the latitudes of the two points and the average of the longitudes.

If you need it a bit more precisely, you can use the Haversine formula and some algebra to derive the midpoint.