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plan. polar coordinator-A system of poier
ooordiiaa in whiih the pdrrts sfl Ii in one
plsne. In the Iarnirrobgy of anatytii gaemstry,
the d~lanoa from the origin to the poinf is ffre
rnegmtude of the rartkrs veclor and the polar
dislmrca is the vectorial arrgfa.
plan. rutangulsir coordinatea-A system
Ofcoodnat en in a horizontal pfene, used to
describe the positions of points with respect to
an origin. Also salted plans coordirmtos.
plane survay-A survey in whiih the surface
c4 the Emth is conaidsmrf e pfsne. 1% arnsll
simas, precise msulte may ba oMalnsd with
plsn-aurveylng methods, but the ascuracy and
precision of such rasufrs till dacraasa as the
sras surveyad irrcrassaa in size.
plamstable MAP-A msp co~ilad by
plantable mathcds. Tfra term includes map
made trj complete field mapping m a base
projection ard field corrtwring on a pfenimetric
base map.
planatablc tmvars~ graphical traverse
accompfiihed by @antstable. methods: .
MIL-HDBK-850
plsnotsbla-A fiild device fer ptotthg the fines
of e survey diracrty from obesrvationa. It ccmsistn
essenfkdly” of a d~awing board rrwunted on a
tripod. with a Ievefing device dsaignad as psrf of
the bosrd and tripod. See else elidade;
Phlleddphla Ievellng rod; stadia.
planetary ab.arratlon-The angular
dispfscement of the gaomatric direction
betwasn the ob@f end the obsarvar et ths
instant d light emission, from the gaawrmiric
direction at the instent of observation.
planetsry conffgurstlone-Apparenl
positions d ths pfanats relative to asch other
and to other bodies of the solar svstem. –.
fmm the Earth.
ss saen
planetary geometry-l. Mathematical
traatnwrd of the shspe and figure of e plenet.
2. Methemsfical treatment of relationships
between M or morn plsnets ardor their orbits.
planetary praoesslon-That component of
general Pr=aesion auaed by the effect of ofher
plenats on the aqustorial profubarenca of the
Earth, producing an aaatward motion of the
equinoxes efong the ecliptic.
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plarrstold-Sea ssterold.
plmmt-A celestial body of tha solar system
ravdviig around the Sun M a naarfy ckcular
orMaarn* bdymvoMmgamunda fir.
See afao ●stwold; Infortor plmmts; Inner
plarmta; melor plarmts, nmrlgatlonal
planets; outor planets; prlnclpel
plarmts; 9uperlor planete; torrastrl.sl
planet.
plana-saa aatronomlc rrrerldlart plan.;
bssal piano; colllmstlon plane; ●pipolsr
plmra: focal plane; gsrodetlc martdlan
plnna; ground plan.; hlfl plan.;
horlzontd plmra; marldlonel plan.;
nodal plane; orbital plane; pampectlva
plane; photoWaph plane: plcturo plane;
prlndpal plane; tangent plane; v-rtlcal
plan-.
planlmetar—A machanicd integrator for
msssuring the area of a plane surfece. Saa also
poler planlmeter.
planimetrlc map+JCS) A map representing
only the horizontal positiin of festums. Also
called Ilne map. See also topographic
map.
planlmetrlc-baao map-A map prepared
from aerisl phofogrsphs by phologrsmmatric
rrwlbds, as a guide or basa fer contouring.
planlmetry-1. The science of maasuring
plane surfaces; horiiontsl measurements. 2.
Parts of a map which mprsaent everything
excapt retisf; that is, works of man, and natural
featurss such as weeds and wstar.
planlspher*A representation, on a plsrre, of
the celestial sphere, esgecialky csre en a polar
projection, with mesns provided for making
certain rnsaeuramanfe. such as affiiuda and
azimuth. Also, a msp rapreasntafion, on a
pkma, C4 the Earth’s sphara.
planlapherlc astrolabe-An astrolabe
consisting c4 a full graduatad circle tih a
centrally mounted aliiads end accasamy
adjustable pletes on which ara engraved
s4eraogmphic projactiins of tha heevens and c4
the sphere for focel latitudes,
Planning Tarrein Anafysla Dets Baso
(PTADB)-Ar 1:250:000 ~le hsfdcOfly, -
gwgmpmc mrormataxi cystam corwatmg 0; a