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Three Sisters Geologic Guide and Recreation Map, by Daniel E. Coe
This map shows more than 70 hiking, mountain biking, and winter recreation trails in the vicinity of the Three Sisters, including the Pacific Crest National Scenic Trail, as well as highways, Forest Service roads, wilderness areas, campgrounds, and snoparks. The eruptive history of the Three Sisters area and key geologic events are described in text, illustrations, and photographs.
Three Sisters Geologic Guide and Recreation Map, 18 x 36 inches, by Daniel E. Coe.
This highly detailed map for the outdoors enthusiast uses a laser-based terrain elevation technology called lidar (light detection and ranging) as the base.
Lidar (light detection and ranging) is a remote sensing technique similar to radar that uses light pulses instead of radio waves. Lidar is typically “flown” or collected from planes and rapidly produces a large collection of very dense and accurate elevation points (up to 500,000 per second) over a large area. The product can be used to generate three-dimensional representations of the Earth’s surface and its features.
The Oregon Department of Geology and Mineral Industries (DOGAMI) uses lidar to create new-generation maps that are more accurate and comprehensive than any in the past. DOGAMI, via the Oregon Lidar Consortium, is continually acquiring new lidar data throughout Oregon.