Dear Colleague,

The U.S. Geological Survey, in collaboration with the Escuela Geología, Minas y Geofísica, Universidad Central de Venezuela, and the Fundación Venezolana de Investigaciones Sismológicas, is pleased to announce the release of the Digital Geologic Map and GIS Database of Venezuela.  The map and data are available for download as U.S. Geological Survey Data Series 199 from (http://pubs.usgs.gov/ds/2006/199/).  

The digital geologic map and GIS database of Venezuela captures GIS compatible geologic and hydrologic data from the "Geologic Shaded Relief Map of Venezuela," which was released online in English (http://pubs.usgs.gov/of/2005/1038/), and in Español (http://pubs.usgs.gov/of/2006/1109/).

Digital datasets and corresponding metadata files are stored in ESRI geodatabase format, accessible via ArcGIS 9.X.  Feature classes include geologic unit polygons, open water polygons, coincident geologic unit linework (contacts, faults, etc.) and non-coincident geologic unit linework (folds, drainage networks, etc.).  Geologic unit polygon data were attributed for age, name, and lithologic type following the Léxico Estratigráfico de Venezuela.  All digital datasets were captured from source data at 1:750,000.

The Digital Geologic Map and GIS Database of Venezuela were designed to serve as a basic framework layer for your Venezuelan research project.  We hope you are able to successfully incorporate this product into your work, and welcome your comments regarding its utility.

Kind Regards

Chris Garrity
U.S. Geological Survey
MS 956 National Center
Reston, VA 20192

Franco Urbani
Escuela Geología, Minas y Geofísica
Universidad Central de Venezuela
Apartado 47028
Caracas 1041A

Paul Hackley
U.S. Geological Survey
MS 956 National Center
Reston, VA 20192

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