in Greece 
  
  
  
  
1.. Historic Development 7 
The personel was instructed in the use of these instruments by. Prof. 
Hugershoff who was for that reason, invited to come to Greece. Few 
experimental works were carried out with these instruments, and 
exhibited in Berlin in 1926, during the second convention of the 
started International Photogrammetric Society. Other works were continu- 
iments : ously accomplished up to 1929, among which, were aerial photogra- 
phies of the Cities of Athens and Piraeus, by means of Toposerie - 
Messter camera for the census of the people (1928). 
122. Phototopographic Section, before the War: 
ks later A new period of expansion and development with instruments in- 
stallations, personnel, on a wide field of application was started in 
ld war 1929, and continued up to the year of the second war in 1940. With | d 
aph As. regards, to the means disposed, the methods applied, and the suc- ? m e 
instru- ceeded results, the following can be generally noted : (ass 
hange- 
Aerial Photography: In Greece, where aviation had not been 
developped to the extent that permited the selection of suitable ty- 
pes of aircraft, and freedom of use for taking pictures, was one of )nly in | 
the most important problems. Originally, and up to 1935 military | 
airplanes, and at a latter date Tourist airplanes, were used. In both | 
cases, means provided were not the most suitable ones. so, Aeropho- I T.C, 
P.W. tography presented gread difficulties, and partly technical defects. n com- 
And that which should be emphasized is the fact, that those unsui- t Delft 
table airplanes were never placed at a free disposal. The height of 
e provi- flights were between 800 and 4500 m. The personnel used for aero- | 
tric Sec- photography belonging to this Section, were always ready, though f these | 
in 1919 at the risk of their lives and uncovered by any insurance. As regards aining- 
3: to the photogrammetric cameras, it must be stated, that these were ipment 
tised according to the capability of means disposed and to the pur- ill ulti- 
pose of its final compilation. During this period the following instru- 
ments were purchased from the Zeiss- Aerotopograph, Jena, firm: 
hyghway 1 Hand camera 13 X 18, 121 cm (1930) 
1 Semiautomatic camera 18 X 18, £21 cm (1932) 
1 Hand camera 13 X 18, £50 cm (1933) 
1 Automatic camera 18 X 18, £10 cm (1937) 
phy was (1 Phototheodolite 13 X 18, £18 cm (1939) ) 
; instru- Field Surveys for Photogrammetry: For the accompli- 
shment of planimetric maps or mosaics from aerial photographs, 
old maps were used, from which few control points were selected " Recti- 
that where thickened by using rectifiers or a radialtriangulator. 
But for the compilation of aerotopographic maps, a lot of field work 
was performed, in order to obtain horizontal and vertical con- chnical 
imarily 
graphy 
so does 
ipment 
and carries out some medium and lárge scale surveys by photogrammétric method. 
In addition to the Survey of India, other Departments using Aerial Photography for studies, 
are the Geological Survey of India, Oil & Natural Gas Commission, Damodar Valley Pp oo Et 
organizations. The activities of these Departments are very limited and are confine to ge specia 
fields of work. Photogrammetry is taught in a few Universities as part of a wide course in Engineer- 
0 1575 7-60 ing and Surveying.