GEOLOGIC MAP DATABASE OF TEXAS
By
Douglas B. Stoeser, Nancy Shock, Gregory N. Green, Gayle M. Dumonceaux, and William D. Heran

ABSTRACT
The purpose of this report is to release a digital geologic map database for the State of Texas. This dataset was developed to provide a digital geologic map database of the Barnes 1992 Geologic Map of Texas. This data set was prepared in cooperation with the Texas Bureau of Economic Geology. The Geologic Map of Texas was originally printed as four 1:500,000-scale sheets. Original clear-film positives of these sheets were provided by the Texas Bureau of Economic Geology. These were scanned, georeferenced, digitized and attributed, edge matched, and combined into a single statewide database. There are three digital layers that cover the entire State: formations and contacts, geologic faults, and graphic decorations. The merged layers are still at 1:500,000 scale, and their use at scales significantly different is not recommended. The provided data formats are ESRI ArcInfo coverage interchange .e00 and ESRI shapefile.

METADATA associated with this publication includes information on the study area, formations, and database format.

ESRI ArcInfo software is required to view the database. ArcExplorer, a free lightweight GIS data viewer, can be used for display, query, and data retrieval applications. Download the latest version of ArcExplorer, free of charge at http://www.esri.com/software/arcexplorer/.

Part or all of this report is presented in Portable Document Format (PDF); the latest version of Adobe Acrobat Reader or similar software is required to view it. http://www.adobe.com/products/acrobat/readstep2.html

Downloads Directory Contains: 10 ArcInfo format files and associated support files for this publication. Run the Arc Macro Language file, load.aml, to rebuild the database on your platform. The Arc Macro Language file, texas.aml, will create a much simplified Arcworkstation graphic of the Barnes 1992 Texas Geologic Map.