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Dr. ir. B. MAKAROVlC,
Testing of photogrammetric restitution instruments*
i. Introduction
The title of this paper is a general one; it covers a wide and com
plex field. Perhaps it suggests at a first glance a treatment of the
conventional metric or stationary tests with the corresponding
drills.
Our intention is to outline the space covering the tests applied
to photogrammetric restitution systems. The emphasis of this
paper lies on the fundamental principles of conducting tests.
The present approach to conducting of tests is new; therefore it
will perhaps require some more attention than in cases of versions
or extensions of more or less known procedures.
In the past, rather limited attention has been paid to the problems
of conducting tests for photogrammetric restitution instruments
and to the relevant fundamental principles. This, however, is due
to the fact that photogrammetric equipment is relatively new and
is still in a stage of development. Systematic and general approaches
to conducting of tests are time-delayed with respect to the design
and construction of the equipment concerned. This delay is due to
the required process of generalisation, which is based on theory and
experience gained with the design, construction and utilisation of
the various restitution instruments.
At the present state of the art and experience some abstraction
and generalisation of fundamental principles is possibleand it is
also necessary. This, in consequence, stimulates a more systematic
approach to the conducting.
The aims of tests are
judgment of instrument capabilities,
detection and calibration of errors,
tracing the adjustment stability and the behaviour of indi
vidual errors over periods of time.
The judgment or evaluation of instruments can be based on three
basic criteria:
docent aan het I.T.C. te Delft:
Voordracht voor de gemeenschappelijke studiedag van de Nederlandse
Vereniging voor Fotogrammetrie en de Nederlandse Landmeetkundige
Federatie op 24 februari 1957 te Wageningen.
