DRG
Subtitle: Digital Raster Graphic Data
By: U.S. Geological Survey
Edition: Ed. 1.
Publisher: The Survey
Published: 1996
Place of publication: Reston, Va
Language: eng
Format: [computer file] :
Subjects: Topographic Maps; Databases; Digital mapping; Topographic maps; Cartography; Automation
Other titles: Digital Raster Graphic Data
Description: "Digital Raster Graphic (DRG) images of USGS standard series quadrangles cover systematically subdivided areas of latitude with formats ranging from 7.5- by 7.5-minutes to 1- by 2-degrees. DRG's of standard quadrangles range in scale from 1:20,000 to 1:250,000. DRG's coverages include the conterminous United States, Alaska, Hawaii, Puerto Rico and the Virgin Islands"--DRGP̲KG.TXT file.
Notes: Title from disc label.

"Mastered 1/96-<7/96>

Text files in ASCII format.

"TIFF PackBits compressed."

Each CD-ROM includes the USGS topographic maps for a 1-degree cell.

System requirements: IBM compatible PC with 80386 or higher; Microsoft Windows 3.1; Microsoft compatible pointing device (mouse); 16 MB of hard drive space; 4 MB of RAM (8 MB recommended); CD-ROM reader.

Disk characteristics: CD-ROM.