Class surface as `lowzoom` around z17-z18.5 (based on latitude) (closes #5101)
Class surface as `lowzoom` around z17-z18.5 (based on latitude)
(closes #5101)

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