Thu Jun 4 16:40:29 1987 : hydrog streams bradshaw bradshaw cell Digital Line Graph data at 1:100,000 purchased from USGS Shows streams and related features This cell file was generated by patching the streams from the Spearfish.quad to the streams from the Deadwood North quad. The vector files are still separate and their names are: streams.spear and streams.dead. They are left separate so the user may practice patching files. The vector files must first be patched together using Vpatch. The patched vector file may then be converted to a cell file using vect.to.cell.