SECOND PLENARY SESSION
13 September, 1952.
President Reading announced the acceptance of applications for mem
bership in the International Society of Photogrammetry from (1) The Cana
dian Institute of Surveying and Photogrammetry, (2) The Society of Photo
grammetry of Great Britain, (3) The Royal Institution of Chartered Surveyors,
Land Survey Division, (4) The Photogrammetric Society of Israel, (5) The
Photogrammetric Society of Yugoslavia, and (5) The Photogrammetric Society
of Japan or The Geographical Society. He also welcomed to full participation
of the Photogrammetric Society of Germany at this Congress.
President Reading then asked for the reading of the resolutions of the
Technical Commissions by their Presidents.
Dr. Howlett read the resolutions of Commission I — Photography.
“The principal work of Commission I since the last Congress has been the
preparation of an international specification which provides a test procedure
to permit the results of camera tests in different countries to be compared. The
preparation of this specification has been greatly assisted and indeed made
possible by much discussion with interested persons throughout the world.
Although an ideal solution to the requirement for a specification has by
no means been reached the Commission can report some measure of success by
the adoption of the present specification for trial, study, and discussion. The
Commission regards this as a useful pragmatic solution for the difficult situa
tion but at the same time wishes to encourage research in this field so that the
specification may ultimately be developed to a thoroughly satisfactory level.
In the interests of securing wide agreement, and completing a specification
in the time available, it was necessary to leave out of the specification certain
matters of interest. It is suggested that Commission I give attention to the pos
sibility of expanding the scope of the specification. Items suggested for atten
tion are definitions and translation of technical terms, a complete agreement
on T-stops, a shutter test method, and a method of testing camera mountings.
In the course of discussing definitions it has appeared to be desirable that the
International Society of Photogrammetry should not independently define
terms which may be the responsibility of one of the International Scientific
Unions. For example, many terms should obviously be in agreement with those
which are or may be defined by the International Commission on Optics which
is under the International Union of Pure and Applied Physics.
The following resolutions were unanimously adopted by Commission I.
(1) Be it resolved that the Specification of Methods of Calibrating Photo
grammetric Cameras and Measuring their Resolution, Image Illumination, and
Veiling Glare with the modifications agreed to by the National Reporters be
adopted for trial and discussion and that it be subject to continual review by
Commission I.
(2) Whereas in aerial survey several different methods of navigation are in
actual use such as electronic methods, methods of visual or contact navigation,
