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Full text

Title
Papers for the international symposium Commission VI
Author
Sitek, Zbigniew

also carries the aiming telescope. Commercially available glass plates
or cut film (4 in x 5 in) are used. Extension tubes and focusing discs
can be fixed to the wide-angle or normal-angle cameras for quick change
from a fixed focusing distance to other distances. Instead of the camera
support, a theodolite can be placed in the tribrach for entering the
control points.
The Wild P 32 Terrestrial Camera has been used successfully for years.
Some special features of this tried and proven instrument are its high
image quality, easy operation, choice of base length and the ease of
combination with the Wild T1, T16 and T2 theodolites. It is flexible,
small, light and easy to use. It takes glass plates and cut film in
commercially available size (6V2 cm x 9 cm) as well as roll film. Like
the P31 Universal Terrestrial Camera, the P32 is corrected for the
visible and near infra-red spectral range so that it can be used with
panchromatic, infra-red, colour and false colour films. The principal
distance of the P32 is 6.4 cm. For close-range photography, the PBA 32
Base Bar was designed to take two cameras with base lengths of 20 cm,
30 cm and 40 cm.
The Wild C 120 Stereometric Camera has been used for many years in
police work. It consists of a base bar, at the ends of which are mounted
two cameras 120 cm apart. The identical cameras have practically distor
tion-free wide-angle lenses f/8, f = 6.4 cm. The cameras take glass
plates 6V2 cm x 9 cm. Corresponding to their base length, the objectives
of the C 120 cameras are fix focused at 10 m. This covers the close-up
range which is so important for police photography and plotting. The
rigid connection between the two cameras at a fixed distance and the
parallel camera axes, or the right angle they form with the base line,
postulate a photographic order corresponding to the most common case
in photogrammetry, the so-called normal case. The normal case involves
extremely simple photography and plotting conditions. However, the
fixed base means that the stereometric cameras have a limited range.
The photographs are plotted either in a special plotter, used exclusi
vely in terrestrial photogrammetry, or in a universal plotter which is
fitted with a switch device - for switching the y and z movements - for
use in aerial and terrestrial photogrammetry.
Description of the plotters
The Wild A 40 Wide-Angle Autograph belongs to that group of special
instruments which can be used only in terrestrial photogrammetry.
Its principal distance range of 54 mm - 100 mm covers the best kown
stereometric and terrestrial cameras. The Wild A 40 can be fitted Q
with a transformation gearbox for plotting from photographs at 30
or 60° above or below the horizontal. There are numerous advantages
to architectural photogrammetry accruing form its ability to plot
in the horizontal (xy-), the vertical (xz-) and the side elevation
(yz-) planes.
The Wild A 10 Autograph can plot at all scales from vertical normal,
wide and super-wide-angle photographs as well as from terrestrial
photographs. The usefulness of this type of plotter in terrestrial
photogrammetry has been repeatedly proven. Depending on the camera