2010. Humboldt County (Calif.) -- Community Development Services. This polygonal dataset serves as a general guide to City Boundaries within Humboldt County, California as of 2010. Also ncludes Spheres of Influenc...
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2014. Humboldt County Community Development Services -- Advance Planning Division. This polygonal dataset shows the extents of the county boundary for Humboldt County, California.
2013. Humboldt County Community Development Services. Humboldt County Fire District Boundaries and Response Areas.
2010. Humboldt County Community Development Services - Advance Planning Division. This polygonal dataset shows the boundaries for the 2010 Board of Supervisor Districts in Humboldt County, California. .