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field of Jümijárvi, built and measured by the National Board of 
Survey, has about 317 geodetic points on an area of 2 x 2 km? , 
The adjustment has given as the maximum coordinate error t4.2 mm 
in planimetry. The accuracy in height is expressed as re- 
lative error + 0.6 mm/km. Another test field has been built by 
the Institute of Photogrammetry on a rocky island Seglinge, where 
all points are fixed on the bed-rock. The coordinates of the 
points are determined partly geodetically and partly using the 
analytical photogrammetric method mentioned above. 
The first results indicate that the first method with goniometer 
and the second one with test fields give identical curves of dis- 
tortion. 
As other lines of research at the Institute should be mentioned 
the determination of the modulation transfer function of dif- 
ferent aerial Cameras, and also research in different non-topo- 
graphic problems. 
During the report period two theses for the doctor's degree in 
the field of photogrammetry have been accepted: 
R.Pekka Malinen: Simulation in Photogrammetry, 1969. 
Einari Kilpelä: Theoretische Genauigkeitsuntersuchungen der in 
Finnland angewandten analytischen Bündelausgleichungsmethode, 
1970, 
T-n"e""N 33t-3"0"n'a'1 *:BOo'a'r'dq -o'f""S'ur sse*y has inves- 
tigated especially the interpretability of different emulsions 
for cadastral cartography. 
The. National Bo ard .o fo Pwb idc R6a ds 
and Waterways has continued the examination of ter- 
rain models for road planning purposes partly in cooperation 
with the private consulting Company V iatek Oy. 
The Finnish Ceodetic Institute has 
continued the investigation of stellar triangulation which uses 
photogrammetric methods for measurement of balloon electron- 
flash points against the stars. The geodetic network for the 
photogrammetric test field of Seglinge was measured Dy this Ins- 
titute,