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photographs are taken around the targeted object by
long focus length camera and a number of distances
between targets are measured by the standard steel
tape. Then the photogrammetric model was reconstructed
and the shape of product was computed. The accuracy of
measurement of the linear magnitudes and of the -defor
mations of the surfaces prefabricated wall products
were - 1 mm and 0.2 - 0.5 mm respectively and of
contact surfaces of the ship J s individual segments
was 1/7000 of the size of contact.
The economical effects do not depend on the
saving of time and cost of measurement but on the possi
bility of periodical control and correction of the shape
of cast in which the prefabricated products are formed.
The investigation performed in the Institut of Photo-
grammetry and Cartography in Warsaw Technical Uni
versity have found that photogrammetric measurement
of the cast /form/ is not economical and the examina
tion of same series of prefabricated products is more
effective /4/. The investigation carried out for
ship-building industry shows the possibility of
constructing larger ships when the successive parts
of ship are constructed in the same dock and
then they are connected in the water# For this
purpose, the actual contact surfaces of the individual
segments of the ship should be determined in order
to ensure the greatest possible precision of the
production of such cooperated parts.
/
2.4. The examination of prototype of engineering
constructions
The usufullness of photogrammetry in this type
of applications depends on the possibility of determina
tion of the prototype parameters and correcting its
construction before the batch production. In this
section three experiments will be presented:
a/ the determination of the spatial deformations of
prototypes of different types of cranes loaded with
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