Full text: Proceedings of Symposium on Remote Sensing and Photo Interpretation (Volume 2)

486 
Figure 3. A new pocket gopher earth mound, the light toned 
patch of disturbed earth, indicating the presence 
of active gopher activity. These mounds of new 
earth, approximately 30- to 45-cm in diameter 
were interpreted from 1:600 scale aerial photo 
graphs to provide estimates of population size. 
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