Relatively accurate projection detection should be feasible for some, particularly vector, maps. Perhaps a library for this could be made. A simple approach wou

Relatively accurate projection detection should be feasible for some, particularly vector, maps. Perhaps a library for this could be made. A simple approach would be convolution of nearby topographic features by assumed potential projection and then a least-difference comparison with observed positions. I am sure the CIA foreign map processing people have had this stuff for decades already.