Record Display for the EPA National Library Catalog
RECORD NUMBER: 22 OF 68
|OLS Field Name||OLS Field Data|
|Main Title||GIS Procedure to Create a National Lakes Frame for Environmental Monitoring.|
|Author||Selle, A. R. ; Larsen, D. P. ; Paulsen., S. G. ;|
|CORP Author||Corvallis Environmental Research Lab., OR. ;ManTech Environmental Technology, Inc., Corvallis, OR. ;Nevada Univ., Las Vegas.|
|Additional Subjects||Environmental monitoring ; Environmental management ; Lakes ; Aquatic ecosystems ; Water pollution effects ; Procedures ; Data processing ; Hydrography ; Surface waters ; Maps ; Geographic Information System ; Environmental Monitoring and Assessment Program ; Digital Line Graph|
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.