Embedded Files
To better understand the physical topographic variation of the ravine in which the GBT is located, beyond that which can be derived from in-person observations and photographs, two lidar surveys of Winnetka’s portion of the GBT were obtained from Kelsey James Rydland of Northwestern University. The PDF topographic surveys are included below:
Figure 45: Topographic lidar survey of the GBT in Winnetka, Illinois.
Figure 46: Topographic lidar survey of the GBT in Winnetka, Illinois, which includes a close up view of the trail for better assessment of the contour variation.
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