Sample-based estimators used by the forest inventory and analysis national information management system

Addendum: The supplementary documents referenced in this manuscript are posted on the Web site https://www.fia.fs.fed.us/library/sampling/index.phpThis chapter outlines prescribed core procedures for deriving population estimates from attributes measured in conjunction with the Phase 1 and Phase 2 samples. These estimation procedures also apply to those Phase 3 attributes in common with Phase 2. Given the sampling frame and plot design described in the previous two chapters, many estimation approaches can be applied. In fact, one goal of the overall design is to maximize flexibility, so Forest Inventory and Analysis (FIA) data can be used to address a variety of analytical needs.