1 - NGA

gaographc positiina detfvad from aelwtad
obeervalions for use in forming istflude ard
bngitudrt oortdiiion squat”b.s.
prollmhwtry surtmy-llre collection of survey
data on #tiih to bees studies for a propeaed
projesf. Sea clso mconrtalssetrco survey.
preliminary trhttgfo-in the adjustment of
lriengukstion, the term pmflmlna~ is epphed
to trianglas derived from eabcfad observations
for u= in forming latitude and longitude
cenditiorr equations.
praflmlnary-Not of the desired ascuracy and
praoisiin, end ed@ed fer te~ery use with
the provieo d later bektg eupemadad.
MIL-HDBK-850
prOproaoscing-Prelirninery transformation cd
raw data required to facilitate furlher
cerfegraphic prcsmeeing.
pmpunch ragfttter ayetem—A melhed in
whiih a system of precisefy located holes are
punshed m the margins of msp or chsrl
meterisde (swh ss films, vinyls, etc.) p+er to lhsiI
sctusl use. Exact register of msterials cen be
=~khad by piecing regisrer studs (smell
plsstiz or metal pins) through the holes, thereby
sssuring exact regisler of detail. See also
reglstar merke.
prescribed grid-The grid that is Iccally
prescribed by the,counlry of cvigin of mifitsry
commander.
Presentation Manager-A graphical user
inletiace devebpad by IBM for U% with the
0S/2 operating system.
press plat.-See plate.
prose prrxrf-A fiihogrsphed impression Ieken
from arrmmt the first cooies run en the Dress
ard used f;r checking tirpeiws. Also ~bd
press pull.
press pull-See prsies proof.
preesum ●ltlmotar-See barometric
eltlmotor.
preewsre dtitud~JCS) An atrnespherii
prasure, expressed in terms of ellitude which
corresponds lo that pressure In the standard
atmosphere. See alw ●ltftuda.
m.
do
presmtm gage-A tkfe gege that is operated
8[ the bottom of the body of water being gaged
ard * rasorde tidal height cknges by the
dtierance in pressure due to the rise and tell of
the tide.
primety bench msrk-A bench meh does to
a tide station to wlii the tide staff and tidal
dstum origimlty - referanoed.
prfmary body-The ceiestisl body or centrel
fwse field aboul wh~h a eateltiie or other body
orbits, or fmm whii if is esoaping, or fewards
whiih it b falting. Also oetled prlmery.
pdmery circle-See prfmary great circle.
primary OomplletlOn-A speciaily prepared
mstte pfsstii materisl usad to depicl sounding
data corrected 10 true depths in bathymetric
compilations.
prlmery great clrola-A great circle used as
the origin of measurement of a ceordinste:
perliculsrfy such e circle 90° from the poles cd a
system of spherical coordinates, as the Equstor.
Also celled furrriemental circle: prlrna~: , -.
circle.
prlmery grid-The major, or principal grid on
msp or cherf.
prlmery key-A key that uniquefy identifies e
row 04 data in a dsta base.
primary row-A single row of attribute deta
eeseciated with e simple feature.
primary ●tatlon-See main scheme
atatlon.
primary tide atatlo*A place at which
mntinuous tide obsewaticme are made over a
number of yeers to cbtein beAc tiial data for
the Iecalify.
prlmery—See primary body.
prime flctltlous merldlan—The reference
meridmn (real or fditious) uesd an the erigin for
maesuremant of ftctitieus Iortgiiude.
prime grid meridian—The reference
meridian of e grid. In polar regions if is usually
the 1S0”4” gaogrephic meriden, used aa the
origin for measuring grid bngifude.