409 
Table 4. The extent of line map production m Sweden. 
Year 
Areas of Line maps in hectares on various scales 
In all 
hectares 
1:400— 
1: 500 
hectares 
1: 1 000— 
1:2 000 
hectares 
1: 4 000— 
1: 5 000 
hectares 
1: 8 000— 
1: 10 000 
hectares 
1: 15 000— 
1: 40 000 
hectares 
unspecified 
hectares 
1960 
_ 
41.000 
118.000 
576.000 
187.000 
125.000 
1.047.000 
1961 
166 
47.000 
97.800 
274.800 
140.800 
45.000 
605.400 
1962 
166 
28.000 
28.800 
174.600 
102.500 
113.000 
446.900 
1963 
700 
72.500 
58.100 
153.700 
22.000 
161.200 
468.200 
Total 
1.032 
188.500 
302.700 
1.179.100 
452.300 
444.200 
2.567.500 
the form of line maps and also survey data and information through 
the study of aerial photographs. 
Line maps have been prepared in large numbers to a scale of 1: 400 
to 1: 40.000. These maps have been used in the planning and design 
of traffic, housing projects, roads, pipe-lines, harbours, hydro-electric 
power projects, estate rationalization etc. Table 4 shows the extent of 
line-map production drawn on different scales during the past four 
years as reported to the Swedish Society of Photogrammetry. 
Photogrammetric surveying has also been used in the measurement 
of profiles and cross-sections of roads. A corresponding method has 
been used in mass calculations of sand pits, town planning areas, and 
water storage. 
Instruments 
The quality of instruments in Sweden has successively been bettered 
and the number increased, all in keeping with the demand and newer 
development in technique. The proqurement of a Wild Stereocompa 
rator (StK 824) by the Royal Institute of Technology in Stockholm, 
may be mentioned as an example. There are, at present, about 50 
stereo-instruments of first and second order in Sweden, some of which 
are equipped with instruments for registration of coordinates. 
The electronic distance measuring instruments, the Geodimeter and 
the Tellurometer, should be mentioned here as an important comple 
ment to the photogrammetric equipment. These have to a large degree, 
facilitated the procurement of pass points for photogrammetric sur 
veying. 
Data processing 
Rapid developments have also taken place in the technique of data- 
processing. Thus the following photogrammetric programs were in use 
in Sweden at the end of the year 1963. 
1. Coordinate transformations.