2015. von Dohlen, Jerry. This polygon shapefile depicts boundariesfor Community Service Districts and Spheres of Influence in the County of Humboldt, California. A Communit... Humboldt County Planning and Building Department.
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2015. Garcia, Paul and Price, Matt. This polygon shapefile depicts boundaries for the Health and Sanitation Districts spheres of influence (SOI) in the County of Santa Cruz, Californi... County of Santa Cruz Information Services Department.
2015. Garcia, Paul and Price, Matt. This polygon shapefile depicts the sphere of influence (SOI) boundaries for county service areas in the County of Santa Cruz, California. A sphere ... County of Santa Cruz Information Services Department.
2015. Garcia, Paul and Price, Matt. This polygon shapefile depicts the boundaries of spheres of influence for water districts in the County of Santa Cruz, California: Central, Lompico... County of Santa Cruz Information Services Department.