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Caption: This chart shows vegetation type and tree size classes in the Drakes Bay sub-basin, derived from a 1994 Landsat image by the U.S. Forest Service (USFS). A majority of Abbots Lagoon, Point Reyes Peninsula, and Home Ranch Creek Calwaters contain non-forested area. The forested areas of Glenbrook Creek and Alamere Creek are dominated by small/medium and small trees with some saplings. The vegetation classification is accurate at a one-hectare scale and is suitable for stand classification. Vegetation is classified according to diameter at breast height (DBH): Very Large = 40-50" DBH, Large = 30-39.9" DBH, Medium/Large = 20-29.9" DBH, Small/Medium = 12-19.9" DBH, Small = 5-11.9" DBH, Saplings = 1-4.9" DBH, Non-Forest = No trees, shrubs, grass, bare soil. See Map for the USFS Landsat riparian vegetation GIS layer and Info Links for more information.
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