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SIP:
INTERNATIONAL SOCIETY FOR PHOTOGRAMMETRY
COMMISSION IV. MAPPING FROM PHOTOGRAPHS
SUB-COMMISSION IV:1. LARGE SCALE PHOTOGRAMMETRY
President: Overdirektór Bórje Lundgren, Rikets allmánna kartverk, Hantverkaregatan 29, Stockholm 8
Secretary: Byrdadirektor Sven G. Moller, Lantmadteristyrelsen, Vastra Trdadgdardsgatan 2, Stockholm 16
General report
Part 1.
Survey of new experiences since 1956 and the state of photogrammetric
science and technique.
This survey is based on the answers to the distributed questionnaire from Finland (Lt. Col. K. Lofstrom),
Sikka), Italy (Ing. Dr. C. P. le Divelec), Lebanon (Dir. M. Grapotte), The Netherlands (Ing. C. M. A. van den
Hout), Norway (Ing. G. Hagene), South-Africa (Mr D. A. Scogings), Switzerland (Ing. A. E. R. Pastorelli),
France (Ing. M. Baussart), Germany (Prof. Dr. G. Lehmann), Great-Britain (Mr H. Dawe), India (B. A. J. C.
and U. S. A. (Mr Chester E. Kowalczyk).
We refer to »Compte Rendu Officiel Du Neuvieme Congres International Des Géometres, Scheveningen et
Delft, Pavs-Bas» 1958. The report of Commission III at that congress dealt with instruments and methods,
photogrammetry and cartography. It contains many valuable information also for the ISP. The reports of
Commission II, cadastre and rural reallotment and of Commission IV, urbanism, reconstruction and urban
reallotment may also interest the ISP.
Hothmer studied »Possibilities and limitations for elimination of distortion in aerial photographs» (Photo-
grammetric Record 1959. Page 426), discussed and compared the different sources of error and their contri-
butions to the total error.
]. Photogrammetric organizations.
The international photogrammetric production is essentially organized governmentally, in the form of civil
departments but to some extent as military departments. However there is also a great privately organized
photogrammetric production.
Aerial photography is performed in the separate countries by a civil governmental department, or a military
department, or a private organization or by any combination of them. Some of these organizations also
perform stereoplotting.
The governmental departments usually perform stereoplotting for their own purposes, in some countries
also for other departments and for private consumers. In some countries private photogrammetric organiza-
tions performed stereoplotting for the governmental departments and the private consumers. In most cases
however the stereoplotting seemed to be organized as a combination of governmental and private under-
takings.
Many private organizations are working all over the world, but most of them only in their own country.
A general impression is that historic grounds and the different possibilities of introducing photogrammetry
for special national applications formed the photogrammetric organizations. The new art and technique,
photogrammetry, is generally accepted, it is true, but has probably not yet found its final form of living.
It is to recommend to study the types of photogrammetric organizations in different countries, their equip-
ment, personnel and production during the next four years in terms of a few selected characterising figures.
2. Cadastral survey and reallotment.
2.1 The application af stereophotogrammetry.
The overall impression is that wide-angle vertical photography on film is generally used to a very great
extent. Normal-angle vertical photography on film, seldom on plates, is also used but only for special
purposes. Normal-angle convergent photography on film is rarely used.