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ANNOUNCEMENT OF PRESENTED PAPERS 137 
Einige Ergebnisse des Luftbildeinsatzes in der 
forstlichen Standortserkundung der GDR 
(Some results in forest site classification by 
aerial photography within the GDR) 
As only a limited number of copies of this 
paper was distributed, it will be reported by 
summary. 
Provisional results based on a detailed stereo- 
scopic study of aerial photographs have shown 
that such photographs can be an important help 
Archives 6 
for the delineation of site classes within forest 
stands. 
For that reason aerial photography on con- 
venient photo scale is much used in practical 
forestry in Eastern Germany. The technique of 
site class differentiation is mostly based on the 
Observation and measurement of the individual 
crown sizes in each stand. Special research to 
find out the possibilities of using a better film 
quality is recommended in order to improve 
possible results. 
Mr Boon's paper (Consult Table of Contents 
of this Part of the Archives!).