1 - NGA

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‘ MIL-HDBK-850
curvature Of Ee~h-1. (obstruction 10 line of
slghl) The offset horn the tangent to the cuwe,
as a reauti of Ihe curvature of the Earth and
refraction combined. 2, The divergence 01 the
Eanh’s eurisce Irom a plane.
curvature of field-An aberration affecflng
the brrgffudinal position of Images off the axis in
wch a manner fhef objacfa in a p4arw
WWrrlcular to the axis are Imaged in a curved
or dish-shaped surface.
‘. .,,
cut tape-See subtractlrrg tape.
cutoff cyllnder-An accessory apparatus,
used In etandardiiation oparatkrrrs 10 reter the
end of a base tape or bar standard to a gmurrd
mark.
cutoff lhse-A survey line tun between two or
more statbns on a linear Iravarae for @a
purpose of producing a closed traverse of that
pan of the survey.
curve
palms
of allgnmerrf-A line connecting
on the suc?aca of the spheroid and
two cutting poslflw-A priming on glees of the
contour drawing used to make the etched zinc
defined by Ihe currdfiiorr that al avary point the
exlmuths of the IWO end pints of the line differ
by axacrly 180”. A curve of alignment is a fine of
plate. A preliminary
production.
step in rafief model
double
normal
cmwfure slightly less in length than the
section lines connecting its IWO end
cut—1. An obsewation between IWO points,
one of which is known, Aleo a grepfrii
poirrta.
representation of such an obsewation. See ak.o
Interaactlon; reaoctlon. 2. A printed sheet
curve of equal bearing—A curve connecting O! SpSClliC syrnboIs used in cartography, such as
all poims at which the greal