We have used the following table to map gnis (USGS=United States Geological Survey) features to the nga feature code :
Code:
airport S.AIRP
arch S.ARCH
area L.AREA
arroyo U.GLYU
bar T.BAR
basin T.DPR/T.VAL/U.BSNU
bay H.BAY
beach T.BCH
bench T.BNCH
bridge S.BDG
building S.BLDG
canal H.CNL
cape T.CAPE
cave S.CAVE
cemetery S.CMTY
channel H.CHN
Church S.CH
civil A.ADMD
cliff T.CLF
crater T.CRTR
dam S.DAM
falls H.OVF
flat T.PLN/U.FLTU
forest V.FRST
gap T.GAP
geyser H.GYSR
glacier H.GLCR
harbor H.HBR
hospital S.HSP
gut H.INLT
island T.ISL
isthmus T.ISTH
lake H.LK
lava T.LAVA
levee T.LEV
mine S.MN
oilfield L.OILF
park L.PRK
plain T.PLN
po S.PO
ppl P.PPL
range T.MTS/U.RNGU
rapids H.RPDS
reservoir H.RSV
ridge T.RDGE
school S.SCH
sea H.SEA
slope T.SLP
spring H.SPNG
stream H.STM
summit T.MT
swamp H.SWMP
tower S.TOWR
trail R.TRL
tunnel R.TNL
valley T.VAL
well H.WLL
woods V.FRST
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The following features were not mapped :
bend - curve in the course of a stream and (or) the land within the curve; a curve in a linear body of water (bottom, loop, meander).
crossing - a place where two or more routes of transportation form a junction or intersection (overpass, underpass).
locale - place at which there is or was human activity; it does not include populated places, mines, and dams
(battlefield, crossroad, camp, farm, ghost town, landing, railroad siding, ranch, ruins, site, station, windmill).
military (historical) - place or facility formerly used for various aspects of or relating to military activity.
other - category for miscellaneous named entities that cannot readily be placed in the other feature classes listed here.
pillar - vertical, standing, often spire-shaped, natural rock formation (chimney, monument, pinnacle, pohaku, rock tower).
reserve - a tract of land set aside for a specific use (does not include forests, civil divisions, parks).
unknown - unknown.