The County of Sonoma Permits and Resource Management Department (PRMD) maintains additional GIS datasets which are available to download from their site. You can also view the data interactively with the ActiveMap web mapping application.
PRMD GIS provides the ability to download geographical datasets. The PRMD GIS information should be used for planning and design purposes only. The geographical information should not be used for emergency services, engineering purposes, relied upon for survey control, or used as a legal document.