Federal Land Boundaries 2023

In the United States, the federal government manages lands in significant parts of the country. These lands include 193 million acres managed by the US Forest Service in the nation's 154 National Forests and 20 National Grasslands, Bureau of Land Management lands that cover 247 million acres in Alaska and the Western United States, 150 million acres managed for wildlife conservation by the US Fish and Wildlife Service, 84 million acres of National Parks and other lands managed by the National Park Service and over 30 million acres managed by the Department of Defense. The Bureau of Reclamation manages a much smaller land base than the other agencies included in this layer but plays a critical role in managing the country's water resources. The agencies included in this layer are: Bureau of Land Management Department of Defense National Park Service US Fish and Wildlife Service US Forest Service在美国，联邦政府管理着该国大片区域的土地。上述土地包括由美国林务局（US Forest Service）管理的1.93亿英亩土地，分布于全国154处国家森林与20处国家草原；土地管理局（Bureau of Land Management）所辖土地达2.47亿英亩，遍布阿拉斯加州与美国西部地区；美国鱼类及野生动物管理局（US Fish and Wildlife Service）为野生动物保护管理着1.5亿英亩土地；国家公园管理局（National Park Service）管理8400万英亩的国家公园及其他土地；另有美国国防部（Department of Defense）管理的逾3000万英亩土地。美国垦务局（Bureau of Reclamation）的管理土地规模远小于本数据图层纳入的其他机构，但在统筹管理美国水资源方面发挥着关键作用。本数据图层纳入的管理机构如下：土地管理局、国防部、国家公园管理局、美国鱼类及野生动物管理局以及美国林务局。