1 - NGA

MIL-HDBK-850
Phlladolphla Iovallng rod-A two-piece
fer@ rod, with gredut”m marks an efyfed that
itmayalso beuaadaa aapaekingmd. For
heights grader ttren 7 feet the target is clarrpd
at 7 feet, and raised @ exfend@I the md. A6 a
Wget md, h is mad try vam’mr to trowandths of
a foot ae a Sp6atring d, to haff-trrmdredfhx of
a foot.
photo sltltuda-f-teighl of an aircrafl above
the mean elevation d the terrain to be
photographed.
photo Index-l. An index map made by
assembling the indwidual aerial photographs
into their p- ratetiie pdfions and copying
the assembly phofegmph=lly at a reduced
scale, Atau called Index to photography;
photo plot; plot map. 2. See ●ortia plot.
photo plot-See photo index, definition 1.
photo pymmld+ component of an
enalytbal mathcd of precise detemninalicm of
phokrgrephic tilt which repraeants e spacifii
,.> .,,
-
spatial mrrfieuration formed by three control
points of known posifii on tha phofegraph
(forming a trkmgle) rmd the e~re station.
When used with the ground pyremkl, b permits
the exscf peeitiin of the exposure station to be
determined and, by analytical tmhniques, the
I exact lilt of the ptwlograph.
pyramid.
Ses also ground
photo revlslon-The process of making
chmgee on a map baaed upon infcmnation
obtained from a study of aerial photographs.
photo ecafe-See ecale, definif”mn 1.
Photonlldade--A ohofottremmetric instrument
,. . . .. . .
having a telescopic elidade, a ptateholdar, and
e hinged rulhg arm mounted on s tripod frame.
It Ls uaad fer pbfting fines of diradkrn end
measuring vertical angles to selected Iaetures
aPrin9 on diiue and terrestrial
photographs.
photoangulator-See ●ngulator.
phstobss*The dffitance batwaen lhe
princ”@alpoints of two adjacent prints of a series
of vertical aerbl photographs. If is usually
measured on one prim after tranafenfng the
principal point of the other print. Sae also bee.
line. defintfion Z.
1s7
photocomposelo mechanicelfy i- one
or mare knagea by afap-and-mpeat axposums
in pradetanninad poaitiine on n press pbte er
wmlpa by means of e photoCortylOaing
mechme.
photocorrtour map-f%sentially, a
t~raphic rrmp upon which the plsn”metric
detail is dapkfad photographically in ke cured
*i. ff ~ ueuaffy prepared from cwvergenf
photography efflmugh cmwantionel verikel
photography can be used.
photocontour process-A pmoesa
davabpad to combine, in a pholocontour map,
that information normslfy portrayed on a
lopegraptk dmwing end an earial photograph.
The tyatem ususlly k mmposad of three
elements (1) e cunventiorrsl ateraopbffer for
oonlduring; (2) a mcfiiier for fill rectifiithr of the
aerial Pholograph& and (3) e zone printer to
eliminate relief displacement. It is deaignad to
utilize convergent phetographe etthough normal
vertical phetegraphe can ba r.diiiied ee well.
photocontrol basa-See control bneo.
photocontml dlegram—Any selected base
MSP Of phOIO index cm wtkh prc$msed ground
control netwerks, te imluda prcpaed posilioms
for psss points, ere defineakd. See also
photocontrol index mep.
photocontrol index map-Any eetaofed
base map or photo index on W)ch ground
amtrot and photo “klentifiad ground poinfa are
depicted end identified. sea also
photocontrol djagmm.
photocontrol point—sea plctum control
point.
photogonlomeler-An instrument for
messuring angles from the true perspective
center to points on a photograph.
photogremmetrlc cmrrem-A general term
trpplicabJe to eny camera used in any of the
several trranchaa of photogrammetry.
photogmmmetrlc compMatlorr-See
compilntlon, definifien 2.
photogrammettlc control point-A
horizomal centml point which hes been
~afablished by phofogrammafric triangulation.