By R. Riley, M. T. Baranoski, and L. H. Wickstrom, 2004. Scale 1:500,000 (1 inch equals about 8 miles).

PG-1 is an update of the Survey's 1996 version of the Ohio oil-and-gas-fields map series, originally released as Digital Chart and Map Series (DCMS) 13-21.An interactive version of this map is available.

GIS releases on CD-ROM contain a PDF file of the map; metadata; ESRI projected shape files; and, if of raster data type, contain the ESRI grid files as well as USGS format Digital Elevation Model (DEM) files. The shape files can be used in many popular mapping software products and also may be used with free viewing software, such as ESRI ArcGIS Explorer« or ArcReader« (provided on CD with orders).