What Distance Does Distanceto Returns?

Does it take into account altitude changes? I mean, if I start in left vertex of this triangle and end in the right upper vertex, does it return distance a or b? double distanceInM

Solution 1:

The altitude is not taken into account when computing Location.distanceTo.

You can test it like this:

Locationlocation1=newLocation("");
location1.setLatitude(40);
location1.setLongitude(-4);
location1.setAltitude(0);

Locationlocation2=newLocation("");
location2.setLatitude(30);
location2.setLongitude(-3);
location2.setAltitude(0);

Locationlocation3=newLocation("");
location3.setLatitude(30);
location3.setLongitude(-3);
location3.setAltitude(100);

Log.e("Without altitude", ""+location1.distanceTo(location2));
Log.e("With altitude", ""+location1.distanceTo(location3));
Log.e("Different altitude", ""+location2.distanceTo(location3));

This is the output:

E/Without altitude﹕ 1113141.5

E/With altitude﹕ 1113141.5

E/Different altitude﹕ 0.0