TM 5-6675-323-14
DEFINITION
ABBREVIATION/TERM
. Altitude of aircraft above surface of earth.
Absolute
Altitude
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. To make light rays parallel by adjustment
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of optical/mechanical system.
. F a c t o r used to convert electronic measure-
Constant
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ment counts of rolling disk planimeter or
linear probe to desired physical unit, such
as feet, inches, yards, etc.
. Closed loop on contour map, plan, drawing,
Contour.
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e t c . Also called isorhythm.
. Difference in elevation of two consecutive
Contour
Interval
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S o m e t i m e s referred to as
section interval.
. Estimates volume of fill or cut via its
Contour
Method
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contours.
. Excavation
or
depression-like
formation.
Cut.
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. P o i n t or edge where cut becomes fill or
Daylighted
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vice-versa.
. Automatic parameters and conditions for pro-
Default
Conditions
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gram statements set by factory.
. S m a l l linear displacement between same
Differential
Parallax
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p h o t o g r a p h i c images on different photographs
resulting from height of surface.
. Measurement of lens power and refraction.
Diopter.
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. M a r k s on edge of photograph to indicate
Fiducial
Mark
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optical center of photograph.
. E m b a n k m e n t or hilly formation.
Fill
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. Distance between center of observer's eyes.
Interpupillary
Distance
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