Vegetation - Modoc Plateau - Devil's Garden, Adin Mountains, Jess Valley [ds2910]

The Geographical Information Center (GIC) was contracted by the California Department of Fish and Wildlife (CDFW) to map specific ecoregions in Modoc and Lassen Counties in northeastern California. The first phase started in 2016 and covered the ecoregion subsections named Cottonwood-Skedaddle Mountains, Likely Mountain, and the eastern portion of Eagle Lake-Observation Peak (Miles and Goudey 1997) which covered nearly 1.1 million acres. The second phase began in 2018 and covered the ecoregion subsections named Devil’s Garden and Adin Mountains, which covered an additional 866,228 acres. The vegetation map followed guidelines set forth by the National Vegetation Classification System and A Manual of California Vegetation. It is an Alliance level map overall, with photo-interpreters attempting to map to the more specific Association level when they were confident to go to that level of detail. The minimum mapping unit for standard vegetation polygons, agriculture and urban areas and water are 1 acre, while for wetland and riparian areas, the MMU is 0.25 acres.