To find binary base map data for a specific geographic area, click on the appropriate 30 by 60 minute quadrangle on the state map below. A Web page containing a graphic of the 30 by 60 minute quadrangle will display eight subdivided 15 by 15 minute quadrangles. Alternatively, you can choose from an alphabetical text list of available 30 by 60 minute quadrangles.

| Altus | Abilene | Alice | Allyns Bight | Anahuac | Angleton | Austin | Baffin Bay | Bandera | Beaumont | Beeville | Brady | Brenham | Brownsville | Bryan | Burkburnett | Cleburne | Coleman | Comanche | Conroe | Corpus Christi | Corsicana | Cotulla | Crockett | Crystal City | Cuero | Dallas | De Ridder | Denton | Eagle Lake | El Campo | Encino | Falfurrias | Fort Worth | Freeport | Gainesville | Galveston | George West | Goliad | Graham | Harlingen | Haskell | Henderson | Houston | Huntsville | Idabel | Kerrville | Lake Charles | Lake Kemp | Laredo | Leesville | Livingston | Llano | Lufkin | Marlin | Marshall | Mason | Mcallen | Mckinney | Mexia | Mineola | Mineral Wells | Nacogdoches | Natchitoches | New Braunfels | Palestine | Paris | Pedernales River | Pleasanton | Port Arthur | Port Lavaca | Port Mansfield | Roma-Los Saenz | San Antonio | San Antonio Bay | San Saba | San Ygnacio | Seguin | Sherman | Stamford | Stephenville | Sulphur | Taylor | Temple | Texarkana | Tyler | Uvalde | Vernon | Waco | Wichita Falls | Zapata |