(121) 
at any other aper- 
in the report. For 
be made at three 
on against distance 
ymmetries shall be 
to the centre value 
:er case, units shall 
maximum theoret- 
is. A corresponding 
bing system should 
ed unanimously. 
— Instruments, 
otogrammetry, the 
Siting and with the 
: fered the following 
- s present: 
so among construct- 
imetry, Commission 
netric competitions 
small scales, photo- 
hich flying for this 
iongs. 
;nt of the methods 
r en place, under the 
res to participate in 
)erators. 
>ns would be assured 
Led unanimously. 
- Geodetic Applica 
tions: 
le period 1952—55, 
>ds of aerotriangula- 
be Commission will 
: the specialists who 
only statistical, but 
t has been realized, 
nd research that can 
render sevice to all those who make use of aerotriangulation, independently of 
the material used. If it is impossible, in the absence of a complete documenta 
tion, to prepare this document before the Congress, this study will be published 
in the International Archives. 
3. That a very precise distinction be established between the communica 
tions which supply positive data, notably experimental results offering a statis 
tical value, and those which express only speculative ideas not sanctioned by 
experience. It shall be the duty of the General Assembly to so organize the 
work of the Commissions as to facilitate this distinction. 
B. With respect to experimental surveys; 
1. That the experimental aerotriangulation activities intended for the 
establishment of large-scale maps be carried out in accordance with the recom 
mendations to the Paris meeting (December, 1950) and repeated on page 5 
of the General Report of Commission III to the Congress of Washington. For 
aero-triangulation work which is to serve in the establishment of small and 
medium-scale maps, the images will eventually provide strips of more than 
100 kms and photographic scales smaller than 1/40,000. 
2. That the international exchange of photographic material and of the 
topographic data necessary for the comparative trials carried out in different 
countries be freed from the hindrances and restrictions now existing. 
3. That the International Society support the organizational efforts which 
tend toward this result. 
C. With respect to subjects for study: 
1. That the comparison between plate and film be studied, not only by 
laboratory tests, but by the results of experimental triangulation activities car 
ried out by means of these two emulsion supports, all other conditions remain 
ing as similar as possible. 
2. That the nature of the errors be brought out by the study of experi 
mental strips conforming to the recommendations set forth above. The study 
of each variation of an operational method should be based upon at least three 
plottings carried out in identical conditions. 
3. That improvements in the results be sought through every practicable 
instrumental, operational, and mathematical method, but that the published 
improvements be confirmed by practical applications sufficiently extensive 
that they may be accorded a statistical value.” 
There was no discussion and the resolutions were carried unanimously. 
Prof. Dore read the resolutions of Commission IV — Mapping. 
1. The limited number of applications of Photogrammetry to very large 
scale surveys is an indication that their production has not always been as 
satisfactory as possible from an economic point of view. 
In consequence, Commission IV decided to place in the first plan of its 
preoccupations, the study of photogrammetric processes and methods adapted 
to surveys at very large scales (1/500 to 1/5000) taking account of the parti 
cular economies and variations for work at these scales. Its members are invited 
to do research on new adaptations. 
(In the discussion of this resolution at the Final Plenary Session, it was