Tract Level Socioeconomic Data System (TRACT) User Manual.

摘要

The purpose of this study was to develop and document a system for providing sub-county updated estimates for specified socioeconomic statistics to be used in the preparation of environmental impact studies. The data were acquired, a system configuration was designed and implemented, and the system is currently available for DOD usage as a supplement to other Environmental Technical Information System (ETIS) components. (Author)