Full text: Commissions V, VI and VII (Part 6)

  
An accompanying cause of the vagueness in measuring stand heights 
18 the fact that the operator in the canopy has to estimate the level of 
the height of the tree representing the mean basic area and then 
measure against this estimated level. 
Literature 
l. Zxelson, H.: Effect of Photo Scales on the Use of Aerial Photographs in 
Swedish. Forestry. Sártryck ur Norrlands Skogsvárdsfórbunds Tid- 
skrift, häfte 3, 1956. 
2. Welander, E.: Uppskattning av trädslagsblandning, trädhôjd, slutenhet och 
kubikmassa med hjälp av flygbilder. Särtryck ur Norrlands Skogs- 
värdsfôrbunds Tidskrift, häfte 2, 1952. 
3. Kommittén fôr skoglig fotogrammetri : Flygbilden i skogsbrukets tjänst, 
Stockholm 1951. 
11 
ES SEN 
  
  
 
	        
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