For the spatial applications there is always need to calculate the distance between two geographic points. In Java it is possible to make this calculation very easly with LatLong java library.
The calculation is based on the Haversine distance that you can find best explained here https://en.wikipedia.org/wiki/Haversine_formula
The code in the snippet bellow explains this in just a few lines where each step is well commented
public class Main2DistanceCalculator
public static void main (String [] args) throws Exception{
// define the lat long for the first geograaphic point
double lat1 = 45.068893;
double lat2 = 45.03078400;
// define the second point
double lon1 = 7.694667;
double lon2 = 7.65651400;
// create two locations with the object LatLonPoint
LatLonPoint gp1 = new LatLonPoint(lat1, lon1);
LatLonPoint gp2 = new LatLonPoint(lat2, lon2);
// calculate the distance between the points with the method getHarversineDistance();
double d = LatLonUtils.getHaversineDistance(gp1, gp2);
System.out.println( d);
}
}
The will give as result or the distance in meters between the two geographic points
In the future datatreemap will publish a guide on how to visualize geographic points in Google Earth and visualize the distance between them. Just like in the following graphics.
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