Return the marginal tiles at the end of the tiles array
Return the marginal tiles at the end of the tiles array

morray/iD,openstreetmap/iD,AndreasHae/iD,ngageoint/hootenanny-ui,ngageoint/hootenanny-ui,openstreetmap/iD,digidem/iD,morray/iD,AndreasHae/iD,AndreasHae/iD,kartta-labs/iD,ngageoint/hootenanny-ui,kartta-labs/iD,openstreetmap/iD,kartta-labs/iD,digidem/iD