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6. CONCLUSIONS
* Assuming enough (minimum) control, proper pre-
calibration or careful self-calibration procedure,
adequate results for architectural use are obtained
(1cm-2cm) even with small-format non-metric
photography.
* The three major factors affecting the accuracy are :
e Photoscale (is connected to the format)
e Metric characteristics of the camera
* Measuring device
The bigger the photoscale (bigger format) the more
information contained in the image can be used by a
high-precision device. Conversely, there is no reason
in using a high-precision device when the information
is not recorded (small format).
Besides, the resolution of the information and the
stability of the camera are two factors that are
interelated. For example, if the highly resolved
information (medium format) is not geometrically
stable (non-metric) we can not recover the losses by
using a high measuring precision.
* Combined (terrestrial + photogrammetric) measure-
ments adjustment did not improve the results consi-
derably.
* Solutions using minimum control information (ac-
cording to *3x3 rules") provided almost as accurate
results as by using minimum constrained solutions
with surveying data.
Concluding this CIPA test we should now proceed with
the following tasks of Architectural Photogrammetry :
* Quick and worldwide photogrammetric documenta-
tion of the architectural heritage.
* The analytical methods of restitution should be further
developed and further propagated.
* Databases are to be developed for national and
international cooperation in the various fields of
cultural resource management, including information
on where photography or plans exist, where
subdatabases are not exist and which fields are
covered by them (MetaDatabases).
* Digital Photogrammetry and digital image processing
are to be further developed.
* Promotion of Photogrammetry among potential users.
* Promotion of activities of National Delegates.
Cooperation with other committees and organzations.
Promotion of cooperation with the military and the
local fire brigades.
Cultivation of macrophotogrammetry. Cadastre of
small monuments and museumphotogrammetry.
469
REFERENCES
Dallas, R.W.A., 1990. A specification for the
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Grussenmeyer, P, B. Merckel. 1995. Architectural
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Patias, P., D. Rossikopoulos, O. Georgoula. 1993. CIPA
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