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| | Open-File Report 01-318 |
 | | ESRI ArcView (.shp) files (These files are the separate coverages, compressed, and ranging from 6 KB to 5.7 MB) |
 | | The ESRI ArcView shapefiles are the coverages of political boundaries, counties, provinces, cities, urban areas, airfields, roads, railroads, electrical power network, river networks, ecoregions, population density, dental fluorosis prevalence rates, elevated flouride sources, ore deposits, oil and gas fields, coal-bearing age units, coal fields, coal mine production and rank, and geology (scale 1:10,000,000). |
 | | ESRI and MapObjects are registered trademarks in the United States and are either trademarks or registered trademarks in all other countries where they are used, and ArcExplorer is a trademark of Environmental Systems Research Institute, Inc. |
| pubs.usgs.gov /of/2001/of01-318 (524 words) |
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