1. 
2. 
3. 
  
-4- 
from the following 13 countries: Australia, Canada, France, Hungary, Malaysia, 
Mexico, Netherlands, Poland, South Africa, Sweden, U.K., U.S.A. and the U.S.S.R. n e 
The iwelve items of the questionnaire are discussed in turn in this summary 
compiled from the response. 
NEW PHOTOGRAMMETRIC ORGANISATIONS 
Within the period under consideration, 17 new photogrammetric organisations have 
been established. It is difficult to ascertain any significant trend in their 
distribution since they were, for all intents and purposes, evenly distributed 
among the "developed" and the "developing" countries. 
NEW PHOTOGRAPHIC INSTRUMENTS 
The advent of the new breed of precision plotters (Planimat, A10, PG3, ete.), 
the increased availability of computing facilities and the now advanced I.M.T.* 
procedures seem to have had their influence on the number of universal instruments 
(11) and comparators (17) which were installed. 
In direct contrast to these figures, there were 92 of these precision plotters 
sold over the same period. The topographic plotters (190), however, still appear 
to account for the major share of the instrument market. 
The orthophoto seems to have come into its own. This is clearly illustrated by e e 
the fact that more than 30 orthophotosystems have been acquired and by the number 
of countries that are now producing orthophotos. More will be said about this in 
the following section. Forty-one aerial cameras, thirteen rectifiers, two A.P.C.'s 
and various point-transfer devices complete the review of new instruments 
obtained by the reporting countries. 
NEW TYPES OF PRODUCTS OFFERED 
a) Photomaps 
As mentioned previously, there has been great activity in the production of 
  
orthophotomaps and photomaps. A few outstanding examples have been reported 
and will be briefly outlined. 
Canada Here the emphasis has been placed on the fully automated Hobrough 
Gestalt Orthophoto System. The largest single project being carried out is 
the production of the agricultural series of the Maritime province of Prince 
Edward Island, at a scale of 1:5.000 with a 2 metre contour interval from 
1:20.000 photography. At the time of reporting, 85% of the project was à 
completed. The vast areas of Northern Canada have also been tackled. The e o 
rectification method is employed in the flat areas (280 sheets at 1:25.000), 
whereas in the other areas (34 sheets at 1:50.000) orthophotomaps are made 
using the Hobrough Gestalt system. This fully automated system with its 
excellent quality, quick rate of production (3 per hour) and high efficiency, 
  
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