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Exhibitions — Expositions — Ausstellungen 
OPENING OF THE EXHIBITIONS 
The opening ceremony of the exhibitions was 
held on Tuesday, July 13 at 9 a.m. The President 
of ISP Dr. S. G. Gamble opened the exhibitions 
with the following words: 
Congress Director Lófstróm, Chairman of the Ex- 
hibits Committee Rainesalo, Ladies and Gentle- 
men: 
| much appreciate the honour of being invited to 
open the exhibition of scientific instruments and 
technical equipment and materials being dis- 
played at this XIIIth International Congress of the 
International Society for Photogrammetry. These 
exhibitions have become an important part of 
our quadrennial congresses and to a considerable 
extent help to make attendance at the photo- 
grammetry congress more rewarding than at- 
tendance at other photogrammetric meetings. 
Every four years we have an unparallelled op- 
portunity of assessing the technological changes 
that have taken place as reflected in the instru- 
ments and equipment that we are so dependent 
upon. It seems to be that this interval is about 
right and for the convenience of congress par- 
ticipants, you can look at this remarkable as- 
sembly of equipment in a single exhibition build- 
ing. 
Besides showing us their latest equipment, the 
exhibitors provide the much needed financial 
support for running our congresses. This they 
do through the rental charges for space and ad- 
vertising in the exhibitors catalogue. In recogni- 
tion of the important role exhibitors play within 
the ISP we are asking the General Assembly to 
support a motion recommending the establish- 
ment of a new category of membership that will 
be named Sustaining Member. | believe that once 
we have this functioning and the exhibitors have 
selected their spokesman, this formal recog- 
nition of exhibitors will work to the benefit of ex- 
hibitors and the other participants in our ISP 
meetings. 
The exhibitors will be welcoming us to their party 
on Monday, July 19, and on behalf of all partici- 
pants | thank them for their hospitality in advance. 
| hope that all exhibitors will find that exhibiting 
at this congress has been an interesting, enjoy- 
able and profitable venture. 
| now declare this exhibit open. 
The exhibitions were open daily from 9 a.m. to 5 
p.m. However, they were closed all day on Sun- 
day, July 18, and at 12 a.m. on Friday, July 24. 
EXHIBITION REPORT 
Scientific and Member Societies' Exhibi- 
tion 
The aim of the exhibition of the National Mem- 
ber Societies was to demonstrate the develop- 
ment of photogrammetry and related fields, their 
techniques, history, present situation and future 
prospects. In the Scientific Exhibition the univer- 
sities, research institutions and Commissions 
and Working Groups of the ISP presented their 
scientific results and research projects. 
These two exhibitions took place in the halls of 
the Main Building of the Helsinki University of 
Technology. Altogether 21 National Member So- 
cieties had their own exhibition panels. About 
one third of these exhibitors had a fairly compre- 
hensive exhibition showing the fields of photo- 
grammetry from various sides (Canada, Denmark, 
Finland, Norway, United Kingdom and USA had 
the most extensive exhibitions). However, most 
participants of this exhibition concentrated on 
separate special subjects. 
In the Scientific Exhibition altogether 16 insti- 
tutes and 3 Working Groups or Commissions had 
their own panels or exhibition stands. Most of 
the exhibitors were concentrating upon demon- 
strating the non-topographic applications of 
photogrammetry. The exhibitions of the National 
Research Council of Canada, Technische Univer- 
sitát Berlin, ITC and Italian Cadastre should be 
singled out for special mention. 
Commercial Exhibition 
The Commercial Exhibition was the widest and 
most popular of the three exhibitions. It took 
place in the Athletics Hall Otahalli, about 400 
meters from the main building. Altogether 44 
Exhibitors had their stands in this exhibition, 
which covered a total area of 2387 m°. The total 
number of exhibitors consisted of 27 instrument 
manufacturers, 4 manufacturers of materials and 
13 firms providing photogrammetric services. 
As to the most interesting novelties in the field 
of photogrammetric instrumentation, the general 
course of new equipment manifested itself in 
the growing use of digital data stores and digital 
data processing instead of analogue methods. 
In the exhibition there was only one completely 
new comparator, the monocomparator PK1 of 
Carl Zeiss Oberkochen. As the new model MK2 
of Kern, it is accurate and easy to use. 
In the field of analogue plotting instruments, 
Wild Heerbrugg was presenting the new stereo- 
plotting system Aviomap/Aviotab. The technical 
realization of this series of analogue plotters 
differs essentially from the former Wild plotters. 
The most significant novelty in the field of ana- 
logue stereoplotting is the use of computer as- 
sisted automatic plotting tables in connection 
with a conventional plotter system. 
The firm VEB Carl Zeiss JENA had a new auto- 
matic plotting system Topomat. The combination 
of Topocart-Orthophot with the image correlator 
Oromat allows e.g. automatic preparing of ortho- 
photos. 
On the whole the most prominent feature of the 
exhibition was the large number of analytical 
plotters. Altogether 9 manufacturers were pre- 
senting their products. 
The two new instruments which can be pointed 
out were the Traster 77 of Matra using a screen 
and polarization filters in the stereoscopic view- 
ing and the Planicomp G 100 of Carl Zeiss Ober- 
kochen. 
The trend in the development of producing ortho- 
photos seems to be toward numerically controlled 
systems. In addition to this, on-line systems more 
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