6. 8 Photogrammetry in Greece 4. 
trol. Basic horizontal and vertical control was established and the 
p accurate ground position of control points Was determined, usually by 
1 tachymetric traverses, terrestrial triangulation or aerotriangulation . 
Map Compilations: With the exception of the Hugershoff Rec- 
tifier which was purchased for the purpose of compiling the Athens 
T plain map in 1930, by aerial photography taken in 1929, the supply 12 
2 of the basic plotting instruments was executed in two ditferent pe- 
riods, one was in the year 1932, and the other in the year 1937. For 
3 this reason the following instruments, of Zeiss Aerotopograph Jena 
firm, were obtained, and were used in accordance to the particular 
4 purpose for which they were supplied, at the time of their arrival 
1 Aerocartograph Hugershoff (1932) 
5 1 » with coordinatograph (1932) 
2 Stereoscops with stereometer (1932) 
6 2 Multiplexes (1937) 
1 Radial triangulator (1932) 
7 1 Rectifier Hugershoff (1930) 
92 Rectifiers . (1932) 
1 Automatic Rectifier (1937) 
8 2 Aerosketchmasters (1937) 
With these instruments, not only the whole needs of the Service were 
9 satisfied, but all known methods, up to that time, were applied 1n 
Aerotopography, for different purposes, and particularly for city 
10 planning, and Terrestrial Photogrammetry for architectural designs. 
Laboratories: For the accomplishment of secondary needs, in 
the modern sence, the Phototopographic Section was equipped with 
THE various assisting instruments and apparatuses. With these equip- 
11 ments, the following had been accomplished : 
a. Photochemical works 
PHO b. Photoreproductions 
( c. Photozingographic (offset) publications. 
12 In a similaar to the expansion of instruments and equipments way 
13 skilled personnel, and room installation was also expanded. 
14 Work Performed: With reference to the accomblished work, 
the following should be mentionned : 
218 flights with a total of taken pictures 36689, among which 33899 
vertical photographs, and 2790 oblique ones. During the same before 
Po 9nd world war period, the compiled maps by photogrammetric me- 
15 thods covered an area of approximately 12000 sq. km., among 
which 500 sq. km. in scale of 1:2000 and above, 4500 sq. km. in 
Pub 
16 
Pub 
Tug PHOTOGRAMMETRIC RECORD 
17 Vol. IIL. No. 15 pad ea 
The FX. 105 Survey Camera by v. W. H. TOWNS AND E. DANIELSSON 
18 Vol. III. No. 15 
Multiplex with Two Projectors and Inclinometer by V. A. WILLIAMS are the 
19 Vol. III. No. 15 i 
Basket Processing of Prints by J. A. EDEN gran : 
OSO 400 1575 7-60 : 
ing anc