The shortest path between two points on a plane is a straight line. On the surface of a sphere, however, there are no straight lines. The shortest path between two points on the surface of a sphere is given by the arc of the great circle passing through the two points. A great circle is defined to be the intersection with a sphere of a plane containing the center of the sphere.



This tool uses Google Map API Tool to draw great circle between any two points on earth surface. Simply click on any points and then click the next point, this program will automatically craw the great circle. Also on bottom of the page you can list of all the distances between two points you selected and longitude and latitude of the mouse position.

Map center: Mouse: Clear Normal Satellite Hybrid