Tribal Land Boundary Polygons, R6 and R9 U.S.-Mexico Border Region, 2021, U.S. Environmental Protection Agency

This polygon feature class contains the boundaries of tribes in the U.S. - Mexico Border region used by U.S. EPA Region 6 (R6) and U.S. EPA Region 9 (R9) for the...本多边形要素类（polygon feature class）包含美墨边境区域内各部落的边界范围，供美国环境保护署第六区（U.S. EPA Region 6，简称R6）与美国环境保护署第九区（U.S. EPA Region 9，简称R9）用于……的相关工作