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TNRIS... maps, information, and digital data for the state of Texas E-mail
Written by Glenn Letham (GISuser editor)   
23 August 2005
The Texas Natural Resources Information System (TNRIS), a Division of the Texas Water Development Board, is the state's clearinghouse for maps, aerial photos, and digital natural resources data.  TNRIS also serves as a distribution center for U.S. Geological Survey maps and has numerous other map collections available for in-house use or reproduction.
Numerous data themes are available for download including:
  • Administrative Areas
  • Atmospheric Resources
  • Energy and Mineral Resources
  • Imagery and Raster Data
  • Land and Biological Resources
  • Land and Water Quality
  • Transportation
  • Water Resources
Of interest, 2.5m DOQs, MODIS data, and clipped DRGs are available.
Users can download select datasets in the projection, format and extent of your choosing using Safe Software's Feature Manipulation Engine (FME).
Data can be accessed directly at http://www.tnris.state.tx.us/DigitalData/data_cat.htm
while meta-data can be found at http://www.tnris.state.tx.us/metadata.htm
TNRIS sponsors numerous GIS training courses, including workshops on using ArcGIS. Details and schedules are listed at http://www.tnris.state.tx.us/techshop.html
TNRIS was established by the Legislature in 1968 as the Texas Water-Oriented Data Bank. In 1972, after four years of growth and diversification, it was renamed the Texas Natural Resources Information System. The mission of TNRIS is to provide a "centralized information system incorporating all Texas natural resource data, socioeconomic data related to natural resources, and indexes related to that data that are collected by state agencies or other entities" (Texas Water Code, 16.021). TNRIS is organized into four sections: Information Services, the Research and Data Center, the Texas Strategic Mapping Program (StratMap) and the Texas/Mexico Borderlands Information Center (BIC).
For a complete listing and site map of data holders see
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