1 - NGA

MIL-HDBK-850
the approach for encoding geographic entities in
which a series of Interrelated geographic objects
are o~nlzed into a network-like structure of
data and predefine relationships.
Feature/Attribute Coding Standard
(FACS)-DMA standard for assigning features,
effribufes, values, and relationships 10 all digital
errfifiea under the Dgiral Pmducfiin System.
See also Feature end Attribute Coding
Catalog.
leeture-A set of phenomens with common
attributes and relatb”nefsipe. The concept of
feature encompasses both entity and object.
See also Primary row.
Fedaral Information Processing
Standards (FIPS)-Official source within the
Federal Government for information processing
standards. FIPS are developed by the Institute
for Computer ScierCes and Technology at the
National Institute of Standards and Technobgy
(NIST, formerfy called the National Bureau of
Standards).
feff nids-The top or smooth side o! paper
thal is contacted by tha Ieff bell tor exlracfion 01
moisture during manufacture, This is the correcf
side of the paper tor printing.
fence—1. A tine of readout or tracking slat ions
for pickup of signals from an orbiting satellite. 2.
A fine or network of radar or radio stations for
detecfbn of a sateltile In orbit.
fermenting dough theory—See Pratt.
Hayford theory of Isostesy.
lerrotype-To burnish photographic prints by
equeegeaing WEI upon a japannad sheet of imn
or stainless plale and allowing ro dry. This
produces a harder, glossler surface on the
photographic prinl.
flbar optics-A device for relayirg an image
by MSah5 of a large number of transparent
fiiers (filaments) by rnuffiile total infernal
raflecfion. The fibers are most comrnonfy glasa
and less often a hlohlv transparent plastic. Each
fiber carlas only orie clement of the image, so
that the image is a mosaic in which the cell size
is the fiir cross secfbn rather than a
ccmtinuoua pklure.
flcflfloue equator-A raferenca Iina sarvlng
as the origin for measurement of fictitious
Iatlfude.
flctlfloua gratlculs-The nefwor% of fines
representing ficflfious parellefs and flcfifbus
meridians on a meP or chart. see also obllque
graflcule; transferee gratlcule.
flcfltloua latffude-Angular dlsfance from a
tictilious equator. It may be celled trsnsvame,
oblique, or grfd Iatituda depending uF9n the
type 01 fictitious equator.
flctltlous longltud~The arc of Iicrifioue
aquator between tha prime fictitious rnerfdian
and any given flcfifbus merfdian. II may be
called transverse, oblique, or grid
Iongltude depending upon tha type of fiiifiius
meridian.
Ilctitlous loxodrome—See fictitious
rhumb line.
flctltlous Ioxodromlc curve-See flctltloue
rhumb llne.
flctltloue merldlan-One of a series of great
circles or fines used in place of a meridian for
certain purposes. It may be called tranaverea,
oblique, or grid meridian depending upon
the type of fictitious meridian. See SSISoprime
tlctltlous merldlan.
flcftflous parallel—A circle or fine parallel to a
fictitious equator, conrsecfing all points of squsl
fictitious Iaiitude. II may be called Wansverae,
OfSllqUe, or grid parallel depending upon the
type of ficfitlous equator.
flcfltioua pole-One of the two points 90”
fmm a ficfltlous equator. tt may be celled
tranaverae or obllqua pole depending upon
the type of fictitious equator.
tlctltlous rhumb llne-A line making the
same oblique angle with all ficfifiius meridiirsa.
It may be called traneveree, obllque, or grid
rhumb line depending upon the type of
fictitious meridian. Also cal~ed flcfltloua
Ioxodrome; fictltloue Ioxodromlc curve.
flctllloue eun—A ficfifbus point termed fhe
maan sun, which is Imagined 10 move at a
uniform rate along fhe Equator, ffs rate of
motion being such thst If mSkeS one apparent
revolution around the Earth In the same time as
the actual Sun-that is, in 1 year.
flctlfloua year—The period between
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