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Open-File Report 97–470 A: Introduction
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The CD-ROM was compiled according to the methodology developed by the U.S. Geological Survey's World Energy Project . The goal of the project was to assess the undiscovered, technically recoverable oil and gas resources of the world and report these results by the year 2000.  A worldwide series of geologic maps, published on CD-ROMs, was released by the U.S. Geological Survey's World Energy Project during 1997 - 2000. 

Specific details of the data sources and map compilation are given in the metadata files on this CD-ROM. 

These maps were compiled using  Environmental Systems Research Institute Inc. (ESRI) ARC/INFO software.  Political boundaries and cartographic representations on this map are shown (with permission) from ESRI's ArcWorld 1:3M digital coverage: they have no political significance and are displayed as general reference only.  Portions of this database covering the coastline and country boundaries contain proprietary property of ESRI. (© 1992 and 1996, Environmental Systems Research Institute Inc. All rights reserved.) 

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U.S. Geological Survey Open File Report  97- 470A, ver. 2.0