Proceedings of Symposium on Remote Sensing and Photo Interpretation: Proceedings of Symposium on Remote Sensing and Photo Interpretation

: 12500 
Figure 4. Statistical Structure of the City Freiburg i.Br. Scale 1:12500 
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2 — 5 m2 
6 ~~ 10 m 2 
11 — 20 m2 
21 ~ 50 m2 
1 m2 green area/person. 
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more than 50 m2 
Boundaries of: 
City districts 
statistical units 
statistical sub-units