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Fig. 1: The Bouri DP4 structural joint.
PHOTOGRAPHIC EQUIPMENT.
The equipment available and employed was:
1) 2 large-format wide angles universal UMK 10/1318
Jenoptik-Jena cameras
2) a syncronizer allowing simultaneous photography
3) the metric projector which projects a reticule
onto the object to be surveyed.
The main parts of this prototype of metric projector
are (fig. 2):
1)A Durst CLS high power projector without its
lens, bellows, slide carrier, featuring 2000 W
cold-light bulb and with air cooling system.
2) A Vinten support block consisting of a rugged
tripod fitted with wheels and mounted with a
Special Durst swivelling head.
A Jenoptik/Jena UMK 10/1318 camera body fitted
with wide-angle lens, with 100. mm focal length.
On the back of the camera body fiducial marks are
visible. The camera is supported by an alidade,
and the whole assembly is mounted on a tripod to
be orientable and positioned according the needs.
4) A Jenoptik/Jena adjusting device which is
backmounted on the UMK camera-body with 3 screws.
5) An optically flat glass plate on which there is
the image of a reticule obtained by
photoreproduction. The optical glass is connected
to the adjusting device, the reticule will be
called pseudo-photogram because it carries the
same information as a photogram in one-photogram
rasterphotogrammetry.
3
—
The pattern of the reticule is shown in fig. 3. At
present it has not been decided the final pattern of
the reticule and how thin the lines will be.
Actually these decisions are related to the device
that will be chosen for the automatic reading of the
Plate coordinates in the rasterphotogram. In fig. 3
the thinnest lines are of 0.04 mm . The study of the
