=
A
(5)
FIG. 17 DIAGRAM OF LEFT AND RIGHT HEAD FILMS SHOWING THE LOCATIONS OF
THE POINTS IN THE UPPER AND LOWER ENDS OF THE STUDS OF THE
PRINCIPAL POINT LOCATOR. IN (A), THE POINTS IN THE RIGHT HEAD
FILM HAVE BEEN TRANSFERRED TO THE LEFT HEAD FILM TO SHOW THE
PARALLAX DISPLACEMENTS OF THE POINTS
Exposure
Station
uae
Datum—
FIG. 18 DETERMINATION OF c AND H FROM MEASUREMENTS OF PHOTOGRAPHIC
ENLARGEMENTS