greatercircle
The shortest way between two places, around the countries you choose.
Shortest paths around the chosen countries are exact for the drawn borders: a route of
great-circle arcs that bends only at their convex corners, found by A* over the tangent
visibility graph. Distances are on a sphere of radius 6,371.0088 km; the direct
distance is also given on the WGS84 ellipsoid.
Borders: Natural Earth, 1:50m (public
domain). Places: GeoNames
(CC BY 4.0),
OurAirports (public domain), and
world-countries
(ODbL); the place list here
is derived from them under the same terms. What they lack is looked up as you type at
Photon by komoot, whose answers are
© OpenStreetMap contributors
(ODbL).