NON-GOVERNMENT/NON-PROFIT ORGANIZATIONS
TNRIS
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. [Summary provided by TNRIS.]