Polar routes, routes that cross hemisphere boundaries (equator and 0/180 longitude), and very large or very small routes could conceivably be problematic. Issues at extreme scales are not a huge concern since the target activities (running, cycling, hiking, etc) occur at intermediate scales, but it would nonetheless be nice to work correctly in all cases.
Polar routes, routes that cross hemisphere boundaries (equator and 0/180 longitude), and very large or very small routes could conceivably be problematic. Issues at extreme scales are not a huge concern since the target activities (running, cycling, hiking, etc) occur at intermediate scales, but it would nonetheless be nice to work correctly in all cases.