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2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the boundary between lake islands and lakes at high resolution. Lake islands, or inland islands, are landmasses i... United States. National Geospatial-Intelligence Agency.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the boundary between lake islands and lakes at intermediate resolution. Lake islands, or inland islands, are land... United States. National Geospatial-Intelligence Agency.
2014. Wessel, Paul and Smith, Walter H. F. This polygon shapefile represents the boundary between lake islands and lakes at low resolution. Lake islands, or inland islands, are landmasses in... United States. National Geospatial-Intelligence Agency.
2017. Sierra Nevada Conservancy. This polygon shapefile contains the boundary of the Watershed Improvement Program's Yuba Bear watershed. Sierra Nevada Conservancy.