1 - NGA

set of aalected tingle thamaf!! Iemein
itiormetbrr everfeye.
plennlng chart-A chsrt tiIgnd ap&fiilly
Ior p4srtning flight Operetiins.
ptennlng nrs~rnall-scele rrditary map used
for gemersl planning puqrosee.
MIL-HDBK-850
plestk bfook-Tha bkck of bonded Ct3/hlfOSS
Sc9ta?te sheets, mdr Sheet equal M rftiiese to
Ihaoontcxc irdervet ettheadeoftha relief
rnedel, from which the Ierrein bees is art. Alse
mllsd Iamlrralo.
plastlc rdlof map-A topographic msp
printed on pisatic and molded into a threedirrwnsbnsl
form. The plesfis medum is
gerrerdyfo mmdtryha elarldvslwurn worm
tarrein model to atileve the Ihresdiiensional
representetic.n.
plato coordinates-l%e x- end y+oordirmtes
of control points sppeming on e phc.togrsphc
plate.
plate lavtd-A spirit level ettached to the plste
-, of a surveying instrument for leveling the
grsdwlled affile or, indirectly, mekhlg me Verlical
axis truty verticsl.
plsto reductlo~ling of mntmi peint
imsgea on a delisr plste.
plate-l. (Iiitrogrephy) A lhin metal, pla~ic, or
fMp@ til, thst cawrise the printing im9ge and
* eurbce is treeted to make onfy the
irmge erase ink rscsptwe. Alm cellad press
plate. See aim color plate: combination
plate. 2. (photography) A tranqwant medium,
UMI& 9=, mtrrd wtih a phof~raphkc
emulsion. SW elsrr diaposltivo: stellar
plate.
platforrrt-The vehicle that holds a sensor. If is
uauslty a aateliiie, but may be a plane or a
halimp4er. Senaers can be meunbsd on tripods
for oartain uses, such es examining
etrrctrornsgnet’k radiation frem various types C4
vegelelion,
Pletonlc year-sea great year.
plat-A dmgrsm drswn to ecsla ahowing lend
boundaries end euMiviaiirre, together with all
data essential to !fre description and
idarrtifkation of the several urtita shown thereon,
193
ard including one or more sertificatas indiifing
dueepprovaL A@atdfiers fremarnapift thatil
doaarrnr nsmamrily show ecMtioM 1cultural,
dtinsge, and refief bturoe. sea aim
eedeetrel map.
plot map-see photo Index.
piofflng chart-l. (JCS) A chsrf designed for
the graphical processes of rravigafien. 2. A
sherf designed prirrwity for pbttii end deed
rackonirrg or fines of position fmm caledial
ofxwvalbrre or radio eida. Reiit#, cdtwe, and
drainage are ehovm M nacesmry.
pbttfng sssl+The refstirxrshii of the size of
the ~iislien to the size d the ground ares it
represents.
plot-(JCS) 1. A map, chsrt, or grsph
reprewnting dsta of any sat. 2. To represanl
en a disgram or chsfi the pmitiin or course of s
target “n tarms of angles snd d~s from
known pmitiins bsste a pxitiin on e map or
chsrt. 3. Ths visusl dkpby of a tingle
gaogrsph=l Iocaticm of an airborne objad at a
patiiculer instant of time. 4. A portbn of a msp
or overlay on whiih are drawn the cutfirm’a d the
mess covered by one or nmrs phetogrsphs.
Sss else master piot.
plumb bob-A con”-1 device, ususlly of brass
and suspendsd by a mrd, by masns of whiih s
pint csn bs projacled vertically into ape= over
reist”wely short dktanses.
plumb line-l. The line ef fotce in the
geo@enliel field. The continuous curve to
whiih Ihe directien of grsvity is everywhere
tangential. 2. A mrd with a piumb bob at one
end for determining the dksct@n d grsvify.
plumb point-See photograph nadir.
plurtge-See transft, definition 3.
plus rmgle-see ●nglo of .Ievatlon.
plus de.sllnatlon-See decllnatlon,
definition 3.
plus dlstnnea-Frscfionsl pert of 100 fest
used in designating the location of a point on a
survey Iina as .4 + 47.2,” meening 47.2 feet
beyond SIalion No. 4 or U7.2 feel fmm the
inkiil point, measured along e specified line.
See also plus ●tetlon.