2015. Garcia, Paul and Price, Matt. This polygon shapefile depicts spheres of influence (SOI) associated with incorporated areas in the County of Santa Cruz, California: Capitola, San... County of Santa Cruz Information Services Department.
2015. Armstrong, Jake H. This polygon shapefile depicts Spheres of Influence (SOI) boundaries associated with incorporated areas in the County of Solano, California. These ... Solano County Department of Information Technology.