4 Finland 
owned water power company, Imatran Voima Oy, have acquired photogram- 
metric instruments for their special mappings. 
In the private field there are three companies, Maasto Oy, Kunnallis- 
tekniikka Oy (Finnmap Ltd.) and Maanmittaus- ja Neuvonta Oy (Photogram- 
metra) which perform photogrammetric mappings mainly on large scale (1 : 500 
— 10 000). Finnmap Ltd. performs also aerial photography using a Pilatus 
Porter aeroplane. Photogrammetra has specialized in terrestrial photogrammetry. 
Wide angle cameras Zeiss RMK 15/23 (Pleogon) and Wild RC 8 15/23 are 
mainly used in aerial photography for aerial triangulation and plotting. Also 
aerial pictures taken with normal-angle cameras Zeiss RMK 21/18 (Topar) are 
used for compiling the aerophotographic map 1:10 000 which serves as the 
basis for the Basic Map of 1 : 10 000. The horizon cameras Zeiss RMK HS 21/18 
(Orthometar) and RMK HS 18/18 (Topogon) have been used for special 
purposes such as the agricultural taxation. 
The National Board of Survey performs its photographic flights with the 
two Percival Pembroke planes of its own and with two privately owned Cessna 
195 planes. 
During the last few years the Air Force has performed photographic flights 
at high altitudes (9 000 meters) with a jet plane. 
At present the number of stereoplotters is over 50, including 3 Zeiss 
stereoplanigraphs (mod. C 5 and C 8), 22 Wild A 7, A 8 or B 8 autographs, 
11 Balplex plotters and 12 Zeiss Stereotopes. The types of rectifiers used are 
Zeiss SEG V and SEG I. 
Wild stereocamera, with the base of 120 cm, and Wild A 4 Autograph are 
used by Photogrammetra in terrestrial photogrammetry. 
The Finnish Society of Photogrammetry 
The Society was founded in 1931 and was accepted as a member in the 
International Society for Photogrammetry (ISP) in 1934. On the occasion of the 
30th anniversary the Publication N:o 3 of the Society was issued in 1962. At 
present the total number of members is 203. 
In addition to its ordinary activities the Society has compiled a card index 
of about 2 400 cards of photogrammetric literature published before 1958. The 
Society has also subscribed to the ITC International Bibliography of Photo 
grammetry and Bibliographica Geodaetica (Dresden). 
Eng. Major Gen. (ret.) Karl G Lofstrom has been President of the Society 
since 1963 after Professor R S Halonen, Dr. Tech. 
Mr. S Haggstrom, Dipl. Eng. is Secretary of the Society. The address of the 
Society is: Laboratory of Photogrammetry, Institute of Technology, Otaniemi, 
Finland. 
PRACTICAL WORK 
Aerial Photography 
The Table attached to the report shows that aerial photography on the 
scales of 1 : 3 000 — 1 : 45 000 for various mapping purposes covers annually 
about 50 000 — 70 000 sq.kms. Since 1961 high altitude (at 9 000 meters) 
photography on the scale of 1 : 60 000 has been carried out for the extension of 
ground control, to provide material for small-scale mapping and to bring the 
maps up to date. Owing to exceptionally cloudless weather conditions in 1963 
aerial photography in that year covered a total of 219 000 sq.kms, which is 
more than 60 per cent of the total area of Finland.