2024 Urban Inventory of Portland, Oregon and San Diego, California

This document describes the standards, codes, methods, and definitions for Forest Inventory and Analysis (FIA) field data items. The objective is to describe URBAN FIA field procedures that are consistent and uniform across all FIA units. This URBAN FIA guide will serve as the framework for regional FIA programs; individual programs may add regional variables that support their CORE program, but may not change or add to the nationally standard URBAN FIA requirements. Unless otherwise noted, the items in this field guide are considered standard URBAN FIA, that is, the information will be collected by all FIA units as specified. Items or codes specified as URBAN OPTIONAL are not required by individual units; however, if the item is collected or coded, it will be done as specified in this field guide. It is expected that on average all items in this guide can be measured by a one or two-person field crew in less than one day, including travel time to and from the plot. URBAN FIA plots will be referred to as Urban plots throughout the field procedures. URBAN FIA variables that are optional are referred to as URBAN OPTIONAL.