Särtryck ur Svensk Lantmäteritidskrift nr 2 1968. 
Development of the Application of Photo- 
grammetry to Highway Design During 
the Period 1964-68 
Carl-Olof Ternryd 
Invited paper, Intercommissional working groop IV/V 
The application of photogrammetry to highway design on an interna- 
tional level is now about ten years old. The first time the application 
was really discussed within the ISP was during the London Congress in 
1960. Several countries had, however, before that occasion already intro- 
duced the use of photogrammetric methods in their routines of highway 
design. The development of the application was from the beginning 
quite intensive due to the strong requirements in all countries of increas- 
ing the quality and capacity of the result of the highway design. The 
engineers found that the air-photographs were an excellent source of 
terrain-information at least for the preliminary design-phase. The develop- 
ment was also increased by the development of geodetic equipments and 
methods and of data processing. The construction of electronic length- 
measurement devices, tellurometer, geodimeter, electrotape etc. meant a 
very great step forward for the photogrammetric methods, as the problems 
of control measurements were diminished. The time-consuming and in 
covered terrain complicated geodetic triangulation principles could with 
an acceptable result be replaced by polygontraverses as the measurements 
of longer lengths was facilitated. 
The possibilities of transforming the photogrammetric data into en- 
gineering data were greatly increased by the development of computors 
and computing systems. Also the quality of the photogrammetric data 
became more advanced by the possibilities of correcting for systematic 
errors of photographs and equipments by using data processing for the 
transformation. The great trouble was, however, that the knowledge of 
the character of the systematic errors was too limited. 
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