LAT:LONG:FC:PC:FULL_NAME

FC - Feature Classification:
A = Administrative region;
P = Populated place;
V = Vegetation;
L = Locality or area;
U = Undersea;
R = Streets, highways, roads, or railroad;
T = Hypsographic;
H = Hydrographic;
S = Spot feature.

PC - Populated Place Classification:
A graduated numerical scale denoting the relative importance of a populated
place. The scale ranges from 1, relatively high, to 5, relatively low.
The scale could also include NULL (no value) as a value for populated places
with unknown or undetermined classification.