TCEQ USGS Topographic Map Viewer

The TCEQ U.S. Geological Survey (USGS) Topographic Map Viewer was designed to display the 7.5-Minute USGS Topographic Maps for the State of Texas using an Internet browser. With this viewer, not only can you view and print USGS Topographic Maps, but you can also determine the exact Latitude and Longitude of any feature visible on the topographic maps. These coordinates are automatically converted to the North American Datum of 1983 (NAD83). Several reference map layers such as counties, roads, cities, and rivers have been provided to help guide you to your area of interest. In addition, the 7.5-minute quadrangle index as well as the quarter quad index have been included to help determine the names and numbers for specific quads.

• Help - Read this first. This help page explains how to use the tools available in the viewer. It can also be accessed from the viewer itself.
• Go to the Map Viewer - Best viewed using Internet Explorer 5.5 and above.
• Metadata - This document, mainly intended for those who use GIS (Geographic Information Systems), provides more detailed information about the DRGs (Digital Raster Graphics), the GIS term for "Digital USGS Topographic Maps".
• Contact Us - You may e-mail the Web/GIS Development Team at gismail@tceq.texas.gov