1 - NGA

vcrlical ●xaggoratlon-1. The change in a
rrrcdel aurfeca Crelted by pqerthafly raising
lhe~rarrr heighrof alfpoitissbeve the b9sa
~.
level tie mkdning
Urcmea90ftha
the same base scale.
vartksl scafernferthe
2.
herizontd
retiaf map.
scale ef ● Iermrn model or plssfii
vortlcal ●xtenslo~ ●xtenslon,
defsitii 2.
vortlcal geodotlc drrtu~ee vwtkd
control datum.
VWUCSI lntonslty-The magnatk intens”~ of
the vertical ~rrent of the Earth’s msgnetic
field. rtrckened positive if dewnwsrd, negative it
upward,
vertical parallax—see y-parallax.
vertical pass point-ses supplemental
olevatlon.
vertical photogmph—An eerisl photograph
takerr with the axis of the earners being
tintsined as okxdy as possible 10 a truly
vertical posbion with the rssuftsnt photograph
laying a~roxirrralefy in a horizerrtal plane.
vertical ptana-1. Any plane psssing
Ihmugh a point on the Earth end containing the
zerdth and mdir of thst pdnt; else a plsne
containing a plumb line. 2 (surveying) A plsne
at right angles to a horizontal pfsne and within
whkh angtes and dMmcee are observed.
vertical sketchmeatar-A type of
sketchrnaater in tilch verfiosl phoregmphs are
Ufifiied.
vortlcal etoreotriangulatlO*That perlien
I OfStWSOtriSr@Morl &ncemed with lb
eatabfiimanf of vedikot data. Varkal
stersotriangulation is etten Iirnfted er prscluded
aa an cparatkrn due to the more rigid scarmcy
starxtards established for vertical pesitiens thsn
for fwfzorrtal pcMorrs.
vertical-anglo bench mark (VABM)—A
bench mark with ef.evalion estsbliihed by
vertksl angle me!hak. See alse bench mark.
varllcel-anglfr station—See
aupplamantal etation.
MIL-HDBK-850
Z77
vOrtlc~f-The fine perparxliidsr to the gsoid at
~Y~*.tktid~rn~ UWfCSCeaf
grawry sch. sea UJsobed Vartkal; mass
●ttmctfon vortkal: normal, rlefinltion 3.
vfbmtiOrr-4 eingfa rnovemanf of a pendulum
irrahher dbctbn,toorfro.sea Stso
osclllstlon.
Wdeo Point Posltionlng Data Baa.
(VPPDB)-A DMA analofj VkfeO dac prodrrd
rhii pmvkiaa ● mmmrxpk precise positiiing
ca@@yniriihi amoreversattia rrdeaeLarfe
uaa fhn the Anstyiiil Photogramotrk
Peaitiing System (APPS). VPPOB was a
WmOMl COIWJfw to Mow reel time aordinate
rasdouK designed for ease of use arxl m“nirnsl
Imining time.
video disc [MCGTJ-A 30.5 cm (12”)
Cmstont Angrisr VaJcdy (CAV) ansbg video
discca#rle ofstorir# video imeges ones~
aide (equkwlerd 10 spproxirdely 200 everag-
Si2ed map chests at m dflemrrr kids of view).
See also CD-ROM.
vldao rrrop-hy one of a - of
cartogrsphk preduds thst are *umd, stored,
m-d d~yed using anslog video signals.
vlewfltrder-(aerial camera) An atmiliiry devica
which show the fiikt d view of a camera. tt is
used in the takingd VOrticsl.9arkIpfrotqephy
to con-act cmb angle and rrmintnin fonvmd Isp
(end Iep).
vlgnatthrg-t. (photogmphy) A gradual
reductiorr hdenaity ofpafla ofephetegmphii
image due to the stopping of some of the mys
errtering the lens. Thus, a kms nmurrting rrmy
Inlerfam with the sxtrems oblii mys. An
ant”~netting fitter is one thst gmdrmlty
decmsses in density frerrr the cs’ttw teward the
adge$ it la used with msny wide-angle lenses to
procfuce a photograph of uniform den.shy by
cuiting down the overexposure d the center of
the photograph. 2. (fiihography) A photographic
IXOCeSS wfriih portrays a soiii cmlor in a soreen
vdkh shsdes oft gredudiy inlo Ihe unprinted
paper. @xr water is often ahown by this
methed.
vlrtuel gravity-The forca of gravity on an
etmmspheric parcel, reduced by cerrtrrfugat hrce
due to rhe rrmtk.n of the parcel ralalive to the
Earth.