1 - NGA

enferging w reducing the Lmage C4 a negalfve or
~~:$~:~ by Wasting if onto a
projection print-(JCS) An enfargad or
reduced photographic print made by projactiin
of the image d a nagafive or a transparency
onto e aansiliiad SIeiece.
projection tablaa-oela made evaifeble in
tabutar fomr far determining a definfle
rebst”bnsIip wttii exists befwwn any grid
intersection and arry edjaoant infarawtien d
falituda and kngifude fbrw on the map
projection.
projactlon tkka and eroaaee-licks
fMIPCI~KIJCU tO and inside the nastlino of a
-P @c~ tO indi=te points threugh whkh
parallels end maridans wou!d pass if they had
bean extended. Small cross MS* indiitrr
where the lines inlerswf within the map.
MI L-HDBK-850
projection transforrnatlon-The process of
changing fmm one map prajacfiin to another
MSP pmj~iOn. Tranaforrmticms may involve
chang= in aquatkma, eltiiaeids, scale factors,
cone cerrstanls,. elendard iin~,. aaandard ,, ~.
parallels, origkrs, central meridians, etc.
pl’o]actlon-l. (geometry) The axtension of
lines or planes to Interaecl a given surface the
transfer of a point from one surface to a
corresponding poaitiin on another surface by
greph~l or aneF@al metfrads. SW afee map
prolwtlon. 2. (photography) Tha process of
placing a negative or posffive photograph in a
projecting camara and r~roducing ha image
on a acraan ar on e sensitized photographic
medium. 3. (surveying) The astansion of a fine
beyond the paints wtrish determine its charscfer
and pesitiin. The transfer cd a series of survey
Iinas to a single thaeretkal fine by a series of
fines Pwpandiiuler to the thaorafkal fine. In
surveying a travarsa, a earirrs et rnawumd shod
lines may be projected onto a singla kng fine,
connecting two main eurvey stations, and the
m lirrs is than treetad ae a measured tine of
the treveree. See also prolongation.
projector station—The pesifion of a projesfor
unit of a steraopfoffar tien absolute orientation
hea been aooompliehad. This poeifiin recreates
the concliiiorts existing et the corresponding
camera efaliorr et the instant of exposura.
pro)actor-An optical instrument tilch throws
the image ot e negetive or print upon a ecraen
204
or ofher viewing surface, ueuaffy at a larger
asala. Sea alwr rotfwtlng projador.
prolata Wpsold ot rotatlo~ae prolato
spharold.
prolate spheroid-An ellipsoid of rdation
efongtha rnajorexie, wtrldrieafongtha arrieot
sarfh rotation. Al@ celled prolate ●lilpaold of
rotation.
prolongation-in eurveyfng, .9 fine is
prafanged when the faa wgment d the
au~ay@d fine is mtanded fn the sap-m dimdorr
as the segment lteeM. A pmkngatbn of a curva
under such a datirWorr of exlersskn would be a
lime tangent to the cwve et the pdnf of
exfansian, although the term frequently is usad
to mean a continuation along the curvature of
the curve.
prOOflng-Tha oparaticrn et pulfing proefs of
pfetas for proofreading, revising, approval, and
other purpce.w prior to pnxtustiorr printing.
proOf-A trial print, produced by any mathsd,
for examination or aditing, 10 be marked for
naceseay carmctbns or a~rwal. Sw elso
color composite; color proof; color proof
process; composite; tlnal compoalta;
gaflay proof;” hand proofi OK shaat;
press proof: progreaahro proo?a:
proofing.
proper motion-That oompenant of the
space mation of a celestial bedy parpendicul.sr
to the line of sight. rasuffing in the change of a
star’s apparent pcraitien relative to a soordinata
system such as right aewrrakr. and declination.
This change is axprasaed as a vefoolfy, suoh as
seconds of arc par century.
propo~y map—See cadastral map.
proparty ●urvay—See land survey.
proportlonato maasuramant—A
maasurament that appfias an aven d=tributiin
of a dstarmined excess or defiiierq of
measurement, ascertained by retracement of an
established fine, to provide concordant reletiwrs
between all parts. See alae doublo
proportionate moaaurament; shrglo
proportionate measurement.
prototypa—See ●xperlmentel map; pilot
sheet.