The number of plotting instruments employed is 42,and 2 
of these are used for training.25 of the total 42 instruments 
are Wild,l is & Santoni and 16 are Zeiss. 
2 Precision Stereo-comparators are available for analytical 
operations: one being a Nistri TA 3-A and the other a Zeiss PSK. 
The recording procedure of the measurements is carried out in 
the Ecomat Systems attached to these comparators and the point 
marking operations of aerial-triangulation work is accomplished 
by the Wild Point Transfer instrument.This instrument is also 
utilized in the revision process to transfer points from the 
older plates of a particular area carrying triangulation marks, 
to the newer plates of the same area not carrying any triangula- 
tion marks. 
For the purpose of increasing efficiency generally,a change 
has been made within the plotting organization and a unit called 
'Pre-study and Preparation for Plotting' has beon established. 
The function of the unit is briefly as follows: After each aerial 
photographic mission, the negatives are handed over to the photo- 
laboratory.Here, the test exposures taken just before and just 
after each strip is flown,are cut away,processed and printed on 
photographic paper. 
These prints are then delivered to the 'Pre-study and Pre- 
paration for Plotting' unit,before the flight season is over 
and are examined here.In this examination,the physical condition 
of the triangulation points as well as their configuration and 
whether there are any disturbances in the photographs due to 
possible camera failure are controlled.In this way the possibility 
to take the necessary precautions in due time is facilitated. 
Moreover, the basic goal of the unit is to prevent the plotting 
operator from losing his precious time.In the unit, the area to he 
plotted is divided into sections according to its Size.This is 
followed by the preparation of map bases for each section and 
the selection of models to carry out appropriate plotting of 
each sheet.On each model the sheet frames and referance numbers 
of sheets and the triangulation points existing in that area are 
indicated,and then diapositives are printed from these.Work pre- 
pared in this manner is handed over to the operator together 
with all sorts of information and documents to be utilized Guring 
the plotting process so that he may readily start his mission. 
A lot of difference has been observed,as far as productivity is 
concerned between work described above and work where the operat- 
er carries out his preparations. 
COMMISSION III 
Aerial-triangulation is used generally in the preparation of 
1:5 000 scale STK (Standart-Topographic-Cadastral) maps,and 
furthermore this method is employed in the preparation of maps 
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