||GIS Procedure to Create a National Lakes Frame for Environmental Monitoring.
Selle, A. R. ;
Larsen, D. P. ;
Paulsen., S. G. ;
||Corvallis Environmental Research Lab., OR. ;ManTech Environmental Technology, Inc., Corvallis, OR. ;Nevada Univ., Las Vegas.
Environmental monitoring ;
Environmental management ;
Aquatic ecosystems ;
Water pollution effects ;
Data processing ;
Surface waters ;
Geographic Information System ;
Environmental Monitoring and Assessment Program ;
Digital Line Graph
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||A resource frame is necessary for regional or national scale environmental monitoring so that resources can be selected for sampling with known probability of inclusion. Paper maps have traditionally been used as frames, but they require a significant labor commitment in analog-to-digital conversion. The authors present an automated Geographic Information System (GIS) procedure that creates a lakes frame from the hydrographic layer of the USGS 1:100,000-scale Digital Line Graphs (DLGs). The procedure processes 1:250,000 quad equivalents per run, and is portable to any machine supported by the GIS software. Although developed for the U.S. Environmental Protection Agency's Environmental Monitoring and Assessment Program (EMAP), the procedure may be useful to others in environmental management.
||Proceedings of the ESRI User Conference, Palm Springs, CA., May 20-24, 1991. Prepared in cooperation with ManTech Environmental Technology, Inc., Corvallis, OR., and Nevada Univ., Las Vegas.
|NTIS Title Notes
||48G; 57H; 68D
||PC A03/MF A01