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U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Terrestrial Ecological Unit Inventory (TEUI)

The Terrestrial Ecological Unit Inventory (TEUI) is a system to classify ecosystem types and map ecological units at different spatial scales. The system distinguishes among land areas that differ in important ecological factors, such as geology, climate, soils, hydrology, and vegetation. Maps and information about ecological units are applied in land use planning to describe land capability and identify suitability for various uses.

TEUI Technical Guide

  • Technical Guide: US Department of Agriculture, Forest Service. 2005g. Terrestrial Ecological Unit Inventory Technical Guide. September 2005 GTR WO-68. pp.104. (pdf 2.74 MB)

TEUI Geospatial Toolkit

  • The Terrestrial Ecological Unit Inventory Geospatial Toolkit (TEUI Toolkit) is an ArcGIS extension that assists users in mapping and analyzing landscapes using geospatial data. The Toolkit accelerates the TEUI and Soil Survey mapping process, but can also be used for other natural resource mapping efforts. The Toolkit utilizes raster data (e.g., slope, aspect, elevation), polygon data (e.g., map units), and point data (e.g., soil pedon or vegetation plots), to calculate zonal statistics and display the results in tabular or graphical format. The TEUI Toolkit was developed and is maintained by the USFS Remote Sensing Applications Center (RSAC) in Salt Lake City, UT.

TEUI Success Stories