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constant scale.
MIL-HDBK-850
Ilne of iorca-A fine indicating the diraclion
in whti a force acts, as in a magnetic fietd.
focal magrretlc disturbance-See focal
magnetic anomaly.
IabellnQ+digftal) The process of aasignlng
atfrihstes to potygons.
Laborde map projection—Similar to the
transverse Mercator projection, except that
lhe Laborde projacts a spheroid rather than
a sphere omo a plane. This contormal
pmjectbn is best sufted for regions which
are elongated In a direction which M at a
considerable angle to the msridian. [USAF
special Fl!@f Charts are based on lhis
projection.]
LaCoete. Romberg grsvlmeter—A longperiod
spring suspended cantilevered
weight system adapted to the
measurement of gravity differences,
ladder grid numbers—Those grid numbers
which identify fhe grid lines wilhin the
neafline.
Lambert nzlmuthal equal-ares map
propsctfon -See Lamberf zenlthal
equef.area map projection.
Lambert azimuthal polar map
projection—A Lamberf equal-area map
projffclion wiih the pole of projection al the
pole of the sphere, and lhe radii o! the
circles which represent the geographic
parallels corresponding to the chords of
those parallels.
Lambert bearing-A bearing as measured
on a Lambert contormal chart or plotting
eheel. This approximates a great-circle
baaring.
Lamberf csmtraf equlvafent map
projection upon the ptene 01 the
merldlan-An azimuthal map projection
having fhe pole of the projection on fhe
Equator. Also called Lamben equal
erea marldlonal map projection.
Lambe~ Conformal Cfrafi-A chart on tne
Lamberf carformal projection.
Lambert cortformel conic map
138
prolecf ion—A contormal map projection
of the so-called conical fype, on which all
geographic meridians are repreaenled by
straight fines which meet in a common
pint outside the limits of the map, and the
geographc parallels are rapresantad by a
series of arcs 01 cimfes havi~ this common
@nt tor a tamer. Meridians and psratleb
infersect al tigfsl angles, and angles on fhe
Earih are correctly raprassmed on the
projection. This projection may have one
standard parallel along which the scale is
held exact; or Ihere may be two such
standard parallels, both maintaining exact
scale. At any fmint on the map, the acsle is
the same in every direcfbn. It changes
along the meridians and is constant along
each parallel. Whera thare are two
standard parallels, the scale between those
parallels Is too smafl; beyond them, too
large. Also called Lamberf conformal
map projection.
Lambert Conlormal map projecllon-
See LamDert conformal conic map
projection.
Lambert equal.area meridional map
pro)actlon—See Lambert central
equivalent mep projection upon th9
plane of the merldlan.
Lambeti grid—An informal deaignatlon for a
coordinate system based on a Lambed
conformal map projection.
Lambert zenlthal equal-area map
projection—An azimuthal map projaclion
having the pole of the projection at the
center of the area mapped. The azimuths
of great circles rad!atlng from this tamer
(Wle) are truly represented on the map:
equal distancea on thoss greal circles are
represented by equal linear rfbtancea on
the map, but the scale along those great
circle Ilnes so varies with distance Irom the
pole of the projection, that an equal-araa
projection Is produced. Al= called
Lambarf azimuthal equal-aree map
projecffon.
Iamlnate-1. The procese of ptasewing a
map sheef or other graphic by sandwiching
between two sheets of clear Symhetic
malerial (polyethylene polyester plaslic).
The laminating equipment uses heat and
pressure but no adhesive. 2. (relief model)
See p)estlc block.