1 - NGA

MIL-HDBK-850
elllpoold; Fischer elllpsold 01 1960;
trlaxlal ●lllpaold. and lap-See overlap, dafinffion 1,
●lllpllclty of ●n alllpse-The ratio befwaen end node-l. The 6econd node of an edge
the dffferenco in length of the semi-axes of an (an edge is traversed from the ste!l mds to the
alfiise end ifs eamimapr axb. end node) .2. The last mde of a teatura wilh
●ltlptlclty of the apherold—See Ilattonlng
several
feature
adgas. 3. The fast nods of an areal
which Ie coincident with the first node.
(of the Earth).
Englnaer Topographic LabOMtOrlea
elongation—1. (surveying) The posffion of a (ETL)—See Topograpfslc Englneerlrsg
celasfiil body rrdalive to the observets meridian, Center (TEC).
Is such that the apparent azimuthal movement
Is at a minimum. 2. The angular distance of a ang Ineer’a chain-similar to a Guntere chain
My of the solar eystem from the Sun: tha except that ii is 100 feet in length and contains
angle at tha Earffr between fines to the Sun and 100 finks, each 1 toot long.
another Weetlal body of the .eolar eyafem. See
also greateat alongatlon. englnaa~a leval—Any of a group of precision
emargancy run—See tlda ovar run.
Iavefing instrumanls tor aslabtiihing a horfzonfal
fine of sighl, used 10 determine differences of
elevation.
emargam nodal point—See nodal point,
daflnffion 1. anginearlng map—A map 6h0wlng
infomsation that is essential for plrmntrrg an
amlaalvlty—The amount of enargy given oft engineering project or development and for
by an objacf ralalive to the amount given off by estimating its rest.
a %Iackbody - al the same temperature.
Normally expressed es a posilive number
between zero end one.
enghreerlng survey-A survey executed for . . .
lhe purpose of obtaining inlormatkrn that k
assential for planning an engineering pnsjeci or
●mplrlcal orlantation (rectiflcatlon)— The devalopmenl and estimating ifs msl. The
compsited rectified adjustments ot information obtained may, in pan, be recorded
magniflcafion, swing, easel titt, y-displacement, in the term cd an engineering map.
and Ak-placemenl used to corractfy racreate
the exact condfiions in the projected image that angraver aubdJvlder—A specially dasignad
existed in the negative at the instant of
exposure.
scribing instrument whkh permits the selection
of unitorm tick spacing in aubdvicfing or tfcklng
map projatilons.
emulalon-to-baae—A mntacf exposure in
which the besa of the mpyirrg film is in mmacf angravar—Sae acrlber.
with the amuls”on side ot the shaet being
copied. See also amulalon-to-amu lslon. anlargemant factor—Sac acata of
raprorfuctlon.
emulalon-to-amulelo n—A mntact exposura
in which Ihe ernuls”km of the copying film is in enlergemant/reduction diagram-Chart
mntacf with the emuleion of the sheel being
mpied. See also emulsion-to-baae.
amulalon—A auapension of either lightaenaffive
silver satfs, Dlazos, or photopolymers,
In e mlbidal medium which is used for coaling
tilms, platea, and pepars.
showing tha necessary fens extension and mpy
board axtansion raquired for various
enlargamanfs and recfucfkma.
an fargemaftl-A nagative, diaposffiva, or
paper print made at a larger scale than the
original. Aiso csllad blow up.
encode—To mnvarf data by the use of a coda anroute chari-A chart of air mufaS in epacifc
or a coded set in such a manner that areas that shows the exact bcelion of elacfronfc
reconversion to the original form is passible. aids to navigatbn, such as radio dlrecfbn finder
stations, radio and radar marker beacons, and
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