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A
B
C
Figure 3-21. Russell Lakes State Wildlife Area, San Luis Valley, southern Colorado, United States. A. High-oblique view
looking toward the northeast with the Sangre de Cristo Mountains visible on the horizon. B. Low-oblique vantage
with the camera tilted toward the side, but the horizon is not visible. Notice footpath in lower portion of scene. C.
Close-up vertical shot looking straight down - nadir view. The boardwalk is about 4 feet (1.2 m) wide; the GSD is
1
inch (2.5 cm); interpretability level
=
7 (individual boards in the walkway). Blimp airphotos by J.S. Aber and S.W. Aber.
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