U.S. Geological survey 1:100,000-scale digital line graph (DLG)
Creator: Earth Science Information Center (U.S.)
Creator: Geological Survey (U.S.)
Publisher: Reston, Va. : U.S. Geological Survey, Earth Sciences Information Center,
LCC: G3700 1991 .U5 compu/d
Description: The DLG data files derived from the 1:100,000-scale maps contain selected base categories of cartographic data in digital form. The data do not necessarily correspond to traditional feature separates associated with the maps from the USGS Topographic Map series of the U.S. Geological Survey. Current categories of data include hydrography and transportation. Future plans are to expand the data to cover hypsography, boundaries and the public land survey system. Digital data are useful for the production of cartographic products, such as base maps, and the data are structured to support the analytical functions of geographic information systems. A typical use of base category digital cartographic data is to combine them with other geographically referenced data, enabling various automated spatial analyses to be conducted.
Description: Area 1. Northeastern states.--Area 2. Middle Atlantic States. --Area 3. Southeastern states.-- Area 4. Florida.--Area 5. Southern Mississippi Valley states. --Area 6. Central Mississippi Valley states.--Area 7. Northern Great Lakes States.--Area 8. Texas and Oklahoma--Area 9. Central Plains States --Area 10. Northern Plains states.--Area 11. Arizona and New Mexico. --Area 12. Central Pacific states.--Area 13. Northwestern states.--Area 14. Hawaiian Islands.
Description: System requirements: IBM PC or compatible (80286-, 80386-, 80486- based machines recommended); 640K RAM; DOS; Microsoft CD-ROM extensions version 2.01 or higher; CD-ROM drive; EGA/VGA graphic display; mouse not required but software will take advantage of one, if present.
Description: Disk contains machine-readable documentation: Data users guide 2.
Subject: United States Maps Databases.