BLM CA Administrative Unit Boundary Field Office Polygon

This polygon feature class represents the spatial extent of historical BLM Administrative Unit Boundaries (at the State, District, and Field Office levels).This state...本多边形要素类（polygon feature class）表征美国土地管理局（Bureau of Land Management, BLM）历史行政单元边界的空间范围，该边界涵盖州级、区级及野外办事处三级层级。该州