Original Proclaimed National Forests and National Grasslands

This layer includes both Proclaimed Forest and National Grassland boundary areas. A Proclaimed Forest boundary is the boundary encompassing National Forest System land within a national forest that is set aside and reserved from the public domain by executive order or proclamation; congressional action is required to terminate a proclaimed boundary; if, at some point in time, no National Forest System land remains within the proclaimed boundary, then there is no legal significance to the proclaimed boundary, however, its legal status remains. National Grasslands are lands designated "National Grasslands" by the Secretary of Agriculture and permanently held by the Department of Agriculture for administration under Title III of the Bankhead-Jones Farm Tenant Act.

本图层涵盖公告森林（Proclaimed Forest）与国家草原（National Grassland）的边界区域。公告森林边界指通过行政命令或公告从公共领域中预留并保留的、位于国家森林范围内的国家森林系统（National Forest System）土地所覆盖的边界；废止该公告森林边界需经国会立法程序。若某一时刻该公告森林边界范围内已无任何国家森林系统土地，则该边界不再具备法律意义，但其原法律地位仍维持不变。国家草原指由农业部长指定为“国家草原”，并由农业部依据《班黑德-琼斯农场租户法》（Bankhead-Jones Farm Tenant Act）第三编永久持有并管理的土地。