Dr. Blachut answered, observing that the problem 
of the quality of images is a very important and 
difficult one, and that it has to be studied by 
means of special experiments. 
Finally Dr. G. Birardi (Italy) brought forth the 
problem of the orthophoto as a tool for the 
revision of maps. A less sophisticated instrument 
could be useful for this purpose. Dr. Blachut 
answered, that orthophoto technique has been 
used especially in France where also many less 
expensive instruments are in use. 
Presented Papers 
The chairman then communicated to the 
audience the other contributions to the investi- 
gation of the problem of orthophoto and his 
regrets that these Presented Papers could not 
be examined within the time limits of the 
session. The fifteen Papers concerned had been 
presented by: Dr. G. Parenti (Italy), Dr. H. 
Schóler (G.D.R.) PP 11/46, Mr. R. Schumann 
(G.D.R.) PP 1I/47, Mr. D. Clegg (south Africa) PP 
11/06, Mr. J. Hensch (F.R.G.), Mr. W. Marckwardt 
(G.D.R.) PP 1l/34, Dr. O. Weibrecht (G.D.R.) 
PP 11/65, Mr. P. Spata (G.D.R.) PP 1/52, Dr. K. 
Szangolies (G.D.R.) PP 11/56, Mr. P. Stewardson 
(Switzerland) PP 11/55, and S. Collins (Canada). 
Wednesday, July 14, 1976, from 9.00 to 10.30 
Session 3 of Commission II 
Topic: Analytical Instrumentations 
Chairman: Dr. L. Solaini (Italy) 
Invited Papers 
Author: Mr. Z. Jaksic (Canada) 
Title: The Significance of Analytical In- 
struments for the Development of 
Methods and Techniques in Photo- 
grammetric Data Processing /P ///04 
Mr. Jaksic provided a complete functional de- 
scription of analytical plotters and noted the 
advantage of offering an interactive editing 
capability with a cathode ray tube (CRT), i.e., 
eliminating the plotting table. He also discussed 
orthophoto printing. 
Dr. Case (U.S.A.) asked if it was possible to put 
orientation data e.g. from earlier aerotriangula- 
tion directly to the program of an analytical 
plotter. Mr. Jaksic answered that such possibility 
is already used. 
Author: Dr. G. Konecny (F.R.G.) 
Title: Software Aspects of Analytical Plot- 
ters IP 11/06 
Dr. Konecny said that his presentation was a 
revised version of the one presented at the Torino 
Symposium and published in a German perio- 
ical. 
In his comprehensive presentation Dr. Konecny 
listed all analytical plotters with their features, 
particularly with regard to software. He classified 
the equipment as fully analytical plotters, digital 
Stereo cartographs, and stereocords, the latter 
having no feedback for continuous plotting. He 
made a comparison of costs in 1972 and 1976, 
noting that the overall cost of analytical plotters 
was going down as a consequence of less costly 
computers. He then suggested that software 
92 
costs might go down if the software were user 
(not equipment) oriented and were usable in 
various plotters. 
At the end, Dr. Konecny colled upon Mr. E. Keune 
(F.R.G) and asked him to give the brief general 
presentation on software that he had prepared 
for A.P.C. Mr. Keune mentioned some advan- 
tages of the program for searching error or 
destinating turning-point of the terrain. 
Presented Paper 
Author: Mr. H. Rüdenauer (F.R.G.) 
Title: Digitale Datenerfassung mit dem 
analytischen Plotter AP/C-3 PP 11/42 
Next, there was a Presented Paper on semi- 
automatic point transfer using analytical plotters. 
No marking is necessary and the plotter auto- 
matically drives to previously measured points 
(on one photo) and the operator need only remove 
parallax on the second plate. 
Dr. E. Dorrer (F.R.G.) put forward a question to 
Dr. Konecny about classification of analytical 
plotters and to Mr. Keune about transferring 
points from one strip to the next one. Mr. Keune 
answered, that it is possible, if there is a program 
for such transformation. Dr. Höhle (Switzerland) 
also asked about the classification of analytical 
plotters. 
Panel Discussion 
Topic: Presentation of New Analytical 
Instruments 
Moderator: Dr. G. Inghilleri 
After opening the panel the chairman informed 
the audience that a new instrument belonging to 
the category of digital stereocartographs called 
PC 1 had been built by Officine Galileo. However, 
its presentation had been delayed due to the 
military nature of the instrument: 
The following panelists gave a description of 
their instruments: 
Mr. Ch. Vigneron (France):  Traster of Matra 
Mr. A. M. Colla (Italy): New version of 
APC 4 by OMI 
Mr. S. Menchinelli (Italy): The off-line ortho- 
photoequipment OP 
2 of OMI 
Miss A. M. Michellis (Italy: D.S. analytical plot- 
ter of Officine Gali- 
leo with renewed 
computer and soft- 
ware 
The line of computer 
connected  instru- 
ments of Carl Zeiss, 
Oberkochen with 
the Planicomp C 100 
as the analytical in- 
strument. 
Mr. R. Hamaguchi (Canada): The Instronics Ltd 
analytical Plotter 
built in cooperation 
with NRC of Canada. 
Mr. U. V. Helava (U.S.A.): The U. S. 1 built by 
Bendix. 
Dr. H.-K. Meier (F.R.G.): 
li