1 - NGA

photogrammotrlc conWf-(JCS) Control
esf8blished by pfrotogramnrstric metfnde as
distinguished hum mntrol Easfablished by gnxnd
methods. Ales called mirror control;
multlplax control.
photogrammotrlc mep-A topogrephc map
pmduoed from aerial photographs and gmdetii
control data by rmene d phdogrammetric
instruments. Also called steraomsrtrfc map;
storeotopographlc map.
photogramm.strlc pofnt—see paaa polni.
photogrammotrlc pyrsmld-An rmafyficel
methcd f~ thm pradsa determirratien of
phetograpiic tift, sonsiating d a ground pyramid
and a pfrofo pyramkt, whish represent a spatkd
configuration formed by Ihree control points of
krwwn posflic.n on the photogmph (forming a
triangle) and the exposure station. See also
ground pyramid; photo pymmld.
photo grammetrlc rsctlficetlon—S e e
roctlficatlon.
photogrammntric suwey—A survey utilizing
either terrestrial or aerial photographs.
photogrammatrlc triangulation—See
phototrlangulstion.
photogrammotricatly dlgltlzed-tligitized
from esrial phofogmphs and geodatic control
data by mamns cd photogrammetrk instruments,
previding threedim-ienal oootdkuatec.
photogrammotry-1. (JCS) The eeience or
art of obtaining reliebfe mamurerrranta from
ptrotogmphic images. 2. The preparation of
sherrs and maps from eerial photographs using
stewxcopic aquipment end methods. See also
aarlal photogramm@ry; ●nalytical
photogrammetry;
8teroophotogramms4 ry; terreutrlaf
photogrammetry.
photograph cerrter-The center of a
KdIOtOOmph as indited by the im99aS of the
fducb-l rriark(s) of the samera. In e perfectfy
adjusted camem, the photograph center and
the principal point ere identical.
photograph coordlrtmtos-A system of
coordinates, eiiher rectangular or polar,
describing the ~shion of a ~int on a
MIL-HDBK-850
188
photograph.
photograph merldla*The imepe on a
photograph d any horizontal line in the +ecf
6PW= which is Parefial to the prkipal plane.
Since ati -h fines msst.at infinity, the irmgs of
the meeIing point is at the infemectkm of the
vmti~tititi~-anddl
phOtOQ~ maridiarrs pass through that point.
photograph rtadir-The point at tvhiih a
vertical line through the perapedve canter of
the csnrara Iena piemac ths pfane of the
photograph. Also called nedfr Polnc
photographic plumb poln~ plumb pofnt.
photogmph paralfal-The image on a
photograph of any horizontal fine in the object
_ - is Parpetiiutar to the ptinciil
plane. All photogmph parellels are parperrdiiular
to the prirwipal Iina.
photograph parpandicular—The
perpandiculer from Ihe interior pe~ive
center to the plene of the phcdograph,
photograph plsrre-The pkme in the camera
in vhich ttw @ate W. fiim.is heLd. It is rrd excclly
lhe primary tmd plme of the lens, bul k e
plans pfaced so es to secure the best Mama
of shsrp fetus on ell parts of the pbte or film.
Also sailed Image plane.
photograph plumb point—See
photograph nadir.
photographic covaraga-(JCS) The extent
to which an area is mvared by photogm@ry
from one rnkion or a eeriee of rnisaimre or in a
peried of time. Cmerage in thm sense conveye
the ideal of avaitdility of photography and ia not
a synonym for the word photography.
photographic datum-The affective datum
for each phetegraph. It ia a horizontal pfane at
the avarsge elevation d the tan’sin, on wliih
d=tances rrreaaumd will be al the average aeele
of the photograph.
photographic ●xposure-The time of
exposure multiplied by irradiance or illuminance.
photographic lntarpratatlon-The
examination of photegraphc imege6 for the
purpose of Identifying objects end deducing
thek eignifke.rrce. Also celled
photolntarpratation. SSe dse Imagary
interpratatlon.