This guidance is a revision and update of the 1994 guidance on thematic accuracy assessment for the NPS Vegetation Inventory (Environmental Systems Research Institute et al. 1994). The revision incorporates the sampling design and analysis principles described by the 1994 version as a sound starting framework and by augments them with practical experience gained by the NPS and its cooperators and contractors at more than 100 NPS parks over 15 years. NPS staff informally interviewed many individuals in and outside the NPS who have been involved in project production and oversight. We evaluated...

The objective of the National Park Service (NPS) Vegetation Inventory is to classify vegetation as ecological community types in each of more than 250 NPS Inventory and Monitoring park units ("parks") in the United States outside of Alaska and to map vegetation to that classification scheme developed for the unit. This guidance is a revision and update of the 1994 guidance on vegetation classification within the NPS Vegetation Inventory (The Nature Conservancy and Environmental Systems Research Institute 1994) and supersedes the 1994 version.