CN	Countries
DN	Dependencies
AN	Administrative areas
IL	Towns & cities
AP	Airports
OC	Oceans
SE	Seas
GF	Gulfs
ST	Straits
IS	Islands
AR	Archipelagos
AT	Atolls and Reefs
MR	Mountain ranges
MO	Mountains
VO	Volcanoes
HR	Highlands
PT	Plateaus
PL	Plains
VA	Valleys
RE	Geographical regions
PF	Geographical features
PR	Peninsulas
ES	Escarpments
CP	Capes & headlands
DS	Deserts
CY	Canyons
OA	Oases
RV	Rivers
LK	Lakes
EQ	Earthquakes
AV	Active volcanoes
VO	Dormant volcanoes
IC	Impact craters
UF	Undersea features
DP	Deeps and troughs
SM	Seamounts
TC	Tectonic plates