This polygon shapefile describes the 1990/1997 vineyard and appellation boundaries of Sonoma County. The data was developed from Sonoma County Planning Department 1990 aerial photos, American Digital Cartography, Inc. digital base maps, Sonoma County Assessors office 1:6,000-scale enlargements of rectified 1990 aerial photographs (printed on blueprint-quality paper), and digital maps based on USGS 1:100,000-scale DLGs. This layer can be used for land use analysis and planning in the Russian River region of California. Circuit Rider Productions and National Oceanic and Atmospheric Administration (2002). Vineyards: Russian River Basin, California, 1990-1997. Circuit Rider Productions. Available at: http://purl.stanford.edu/wc096sj4499 This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.