1 - NGA

quad corner IIraao-A user-defined
measure relsling to the pertwn of a
quadrangle mapping sheet where it @ins
two or more other sheets.
quadmnglo map-See quadrangle.
MIL-HDBK-850
quadrangle report-A brief history of the
vine of a apecifc qusdmngle. It
accompanies the mapping materisl through
ash phase of production, and la filed with
the map materiel. The nemslive summary
for each opemhnsl phase stressas
conditions that may affect Ister phases.
quadmngle-A rectangular, w nearly ee,
ares covered by e msp or plsl, usualty
bounded by given meridians cd longitude
and parallels of Iatitwde. Also cslled quad;
qundrmrgla mep. See alse standard
quadrangle.
quadmnt—1.. (rrssthernst.ks) .4_6a~lm @YinE,
an arc of 90”. 2. (surveying) A surveying or
astronomic instrument compased of e
gradusted arc sboul 90” in length (1 80° in
rang a), equipped with a sighting device.
The quadrant msy be considered a form of
sector. Some survey quadrante combine
both surveying and aefronom’k tuncfions.
quadretura-i. The Posi)on in the phase
cycle when the two principal tide producing
Htes (Moon ard Sun) ara neeriy at a righl
angle to the Earlh: the Maon is then in
quadrature in its first qusrler ar tesl quarter.
2. The sifuetion ef two periodic quantities
differing by a querier of a cycle.
quad—Abbrevieled form of quadrangle or
quedrileterel.
quality control—The process of taking
steps to ensure the qualii ot dsta w
ooemtic+rs in keeoirm with standards seI for
the system. -
quarter eectlon corner—A comer et an
axfremhy of e boundary ef a qusrler
section, Writfen as 114 section comer, not
as one-fourth section mrner.
quarter ●stlon-One-foutih of a section,
containing 160 acras mora or less.
Q
quarf-rquarter soctlon corner—A comer
at an esfremity of a boumfsry of a qusrferquarfer
tiion; m~nl between or 20
chains from the ccrrrtmlting cc+nara on the
section or township boundaries. Written as
1/16 eec+km comer. Akso celled sixteenth
section corner.
quartz pendulurrr-A pendulum of fused
qusrfz ueed for determining the
eccelerat”m of greviiy. QUS* ie errployed
in the cohsfrwtkrn because ifs thermal
~Penebn tiient is OntY one-fourth that
ef Invar.
quary langrsage-A set of commends used
for deta rnen~uietion in data beae
management systems.
quick-look plot—A “draft’ plot done very
fast, which may not adhere to the positional
accumcy or syrnbolizetien of tha final plot.
“- qblritarii-A s%rrtant having a range of 144°,
or an arc ot 72”.
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