Track: Water Resources
Conversion of DRASTIC Maps from FASTCAD Drawings to ArcInfo Coverages
David AdamsJoseph North , Suvrat Kher
DRASTIC is a system developed jointly by the U.S. Environmental Protection Agency and the National Water Well Association to map potential aquifer vulnerability. DRASTIC maps are composites made up of eight individually mapped hydrogeological parameters. A separate polygon coverage was built for each parameter and then the eight coverages are composited into a single coverage with all information from the originals for the FASTCAD drawings. These drawings were then converted to ArcInfo coverages edited by county. The county coverages were then edgematched and map joined into a State-wide coverage. The State-wide coverages, for each aquifer, were then dissolved for the individual DRASTIC parameters for further error checking of the composite coverages. Once all errors were corrected, the composite attributes were recalculated for the final State-wide DRASTIC coverages.
David Adams
Florida Dept. of Environmental Protection
2600 Blair Stone Road
Tallahassee, FL 32399-2400
USA
Telephone: 850/414-8550
Fax:
E-mail: adams_d@dep.state.fl.us