Cultural Features
Roads, Railways, Airfields
NOS
National Ocean Service (US)
NIMA
National Imagery and Mapping Agency (US)
IHO
International Hydrographic Organization
NOS/NIMA
IHO
Foreign NIMA Charts
Motorway
Road (hard surfaced)
Track, Path (loose or unsurfaced)
Railway, with station
Cutting
Embankment
Tunnel
Airport, Airfield