1 - NGA

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d-y C’$Ndialdata.
Gsogmphk Nsrw*s Procosslng Syskm
(GNPS)-Ths DMA system which includes the
hardware, cmffwsre srsj eras to nminfain
the geographic nsmee data requirsd for digital
maps ad gsztmeam.
MIL-HDBK-850
gsogm hlc (~oogrephbel)-Signify ing
bade MRfbnehpto the Eartfrcxmddamd asa
gbbe-ahapad body. The term geographic is
applied dike to dsta bad on ths geeid and on
othw spheroids.
geographic coordlnat@a-(JCS) The
qusnfitbe c4 fatituda and Iengituda wlriih ds&ne
the~indapnfonffnswf~ efm.s
Edh with respect to thtr rsferenca spheroid.
Also called astronomic coordlnetes:
gravimetrlc coordlnatea; tormotrial
coordinates. See also coordlnatas;
geodetic coordinates.
geographic lstltude-A general term,
aPPbinjl afike to asfrancsnic 181iidBs ~~
geodetc latitudes.
geographic llmlta-The lines heving Istirude
and Iongkde values bounding the area of a
mm or chart: that eras exclusive of overlao
areas. See siseneatlh-rsis.
geographic location-see geographic
pooltlon.
geographic longltude-A general term,
a@Yin9 afike to astronomk and to geodetic
longitudes
geographic merldlan—A general temf
;~~~~,atike to an as!ronomio or gsodetrc
geogmphlc nama-Aleo called place
name and toponym. sea also Board of
Geographic Names.
geographic nonllnoarlty—The error
introduced by digitization and subsequent
processing 10 Ihe total error of both abdute
ard reletfie positioning of any Ieature on the
gmphk.
geographic perallef-A general term,
applying atike to an eafronomic parallel or e
geodetic parallel .
gaographlc posltlo~Tha position of a point
Ontheaurfea c4the Earfhuupmeed krmrrtw
of latiiuda end bngitude, either geodetic or
astronomic.
gaographlc ●urv*y-A general term. mt
~pfibk & defined Iirritsfion, covering a wide
mWe & Wweye fying between and merging
into axpbmfory wrvaye on the one hand and
bsdc topogmphii eurvays on the cdher.
Gaographk etevays WJ.4y cover kwga areas,
are based on coordinated control, end am uaad
to record ptryskal and statistical ctssmcferfsrks
of the area surveyed.
geographic vertical-See vertical.
googrephlcaf ●ma claaWtcatlon
eyatern-A fogicsl snd orderfy gaographksl
division of the world using nufirs, Iattem! and
ccmbinaticms of the same for the deeignakxr of
areas and subsraas.
goographlcef ●xploretlon trmrome-A
route followed scross some parts of the Earth,
approximate positions ebng whmh are
determined by surveying or nevigslional
methods.
gaographlcel mile-The length of 1 minute
of erc at the Equator, or 6,067.08 feel (on the
Clarke cpheroid of 1666).
gaographbrd pofe-Eiiher of the two points
cd intersection of the sudece of the Earth tih its
axis, where all meridtans meet.
geoidaf contour-A line on the suriace of the
geoid of mnstant elwation with reference to the
surface of the spheroid of reference. Geoidd
contours depend on the surta of reference as
wellaeon lheahapedthegeoid. Theeama
gecid referred to different surfeoes of refemnos
will give different sets of gaoirhl contours.
geoldel holght profile-See
●strogoodetlc Ieveflng.
gooidal height—The distence of the gaoid
above fpodive) er bebw (nagative) the
methemalicsl reference spheroid. Also celled
geold separstlon; undulation of the
geold. See alw sstrogeodetic
undulations.
geoldd horlzors-llat circle of the celestial
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