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present the topographic maps have been renewed and maintained, and the pho- 
togrammetric methods have been used for that purpose, too, The old cadas - 
tral maps at the scale 1:2880, which had been accomplished and systemati - 
cally brought up to date in the past two centuries till World War II, be - 
came obsolete due to the fast development of the socialist economy in the 
country. Therefore since 1962 new large scale maps, called Technical Econo- 
mic Maps now, at the scales 1:5000, 1:2000 and 1:1000 have been surveyed 
and publishéd. One of the three scales mentioned is to be chosen according 
to the economic importance of the area, Photogrammetry is the prevailing 
method for the new large scale mapping. The contour lines are immediately 
plotted with stereoplotters; the planimetric points are registered and pro- 
cessed.by means of computers and automatic coordinatographs /31/, /32/ .In 
1971 a computer program was accomplished at the Research Institute of Goe- 
desy in Prague, which allowed to reduce the size of buildings defined by 
photogrammetry for the eaves distances being measured geodetically. The 
Forest Economic Maps at the scale 1:5000 are plotted with the universal 
stereoplotters /5/, /43/; analytical aerial triangulation is applied for. 
the control. The Railroad Maps at the scale 1:1000 are photogrammetric maps, 
too. The application of ortophoto maps has been under investigation now/17/, 
/21/, /38/. Photogrammetry is used occasionally for special purpose mapping 
at the scales 1:1000 and 1:500 /37/, /49/. 
5. Terrestrial photogrammetry and short range photogrammetry have been used 
for a variety of research and technical problems. A great activity in that 
field of interest shows the Technical University in Bratislava /8/, /26/; 
some examples of application were investigated at the Technical University 
in Prague /10/, /11/, /14/, /39/, at the Research Institute of Geodesy in 
Prague /35/, /36/, and at some other places, too. Photogrammetry has been 
used more frequently in architecture for surveying and documantation of his- 
torical buildings /4/, /9/, /12/, /25/, /41/, /45/; for surveying of models 
in civil enginering, in industry and mining /23/; for tunnel profiiing by 
means of light or laser ray projected onto the tunnel walls /44/; for long 
period surveying of erosion, depression and slides, Analytical as well as 
graphical photogrammetric methods have been applied LT, 
6. Czechoslovakia was charged by the General assambley of the XIth Interna- 
tional Congress of Photogrammetry in Laussane to lead the VIth Commission 
of ISP in the years 1968 - 1972. Czechoslovak photogrammetric comitee was 
at its regular sessions systematically looking after the organization and 
thematical tasks of the VIth Commission during that period. Among others, 
the National Symposium which dealt with the problems of the VIth Commission 
took part in the year 1969 and set course for further activity. 
The total activity of the Czechoslovak photogramme try concerned with the 
VIth Commission and the obtained results are described in separate report 
of the VIth Commission, which is at disposal to all participants of the 
Congress.