The enhanced forest inventory and analysis program

Addendum: The supplementary documents referenced in this manuscript are posted on the Web site https://www.fia.fs.fed.us/library/sampling/index.phpThe Agricultural Research, Extension, and Education Reform Act of 1998 (Public Law 105–185), also known as the 1998 Farm Bill, prescribed conceptual changes in approaches to forest inventories conducted by the Forest Inventory and Analysis (FIA) Program of the U.S. Department of Agriculture (USDA) Forest Service. Realization of these conceptual changes required development and implementation of technical changes, some of which are substantial. The underlying purposes for documenting the conceptual and technical features of the resulting Enhanced FIA Program are fourfold.