The overlays were scanned using Anatech Scansmith sofware driving an Eagle 4080 ET scanner to produce .tiff files. The coverages were then edited to eliminate dangles, gaps, and other errors, and built to the appropriate topology. Items were created for features in each coverage and attributed as appropriate. Test plots were generated with data sets plotted over other data and base topography and hydrology for review by USGS map editors and authors. Errors were corrected by on-screen digitizing, and corrections were checked again by map editors and authors.
Frame is arc along the quadrangle boundary.
File readme.txt included with the data set. Please contact the USGS Eastern Earth Surface Processes Team for more detailed information. Contact David Weary, USGS Eastern Earth Surface Processes Team, MS 926A, Reston, VA 20192 for CD-ROM copies or FTP access.