comes more stringent and is thus adapted to the stages of planning. The 
role played in this connection by the instrument combination mirror 
stereoscope, Balplex Plotter and precision equipments is tremendously 
important. 
The methods have been elaborated in such a way that a methodologi- 
cal skeleton has been obtained from which deviations due to local con- 
ditions may easily be made. The methods have, moreover, been so work- 
ed out that the utilization of photogrammetry in connection with road- 
planning does not call for more than a small number of photogrammet- 
ric specialists, and there are thus possibilities of extending the use of 
photogrammetry on the local plane. 
References: 
l. Hallert, B.: Über die Genauigkeit der Luft-Photogrammetrie; Kungl. Tekn. 
Hogskolans handlingar. Stockholm 1956. 
Kasper, H.: Photogrammetrie und elektronisches Rechnen im Dienste der 
Strassenprojektierung ; Strasse und Verkehr. Nr 10/11 1958. 
3. Hallmén, B. and Waernér, G.: The data machine in road planning. Permanent 
International Association of road congresses, XIth congress Rio de 
Janeiro 1959. 
2. 
  
  
  
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