Base Layers
- Aquifers - Major
- Aquifers - Minor
- Artificial Reefs - Aug, 2012
- Average Annual Regional Precipitation
- Bailey's Ecoregions
- Basins
- City Points
- Counties
- Freshwater-Saltwater Line
- Geology - 250K
- Gould Ecoregions
- Lakes & Bays
- Lake Texoma Boundary Line
- Major Bays
- Minor Bays
- Natural Regions
- Natural Sub-Regions
- Omernik Regions Level IV
- Playas
- Quads - 24K
- Significant Streams Segments
- Springs
- StatePlaneZones.ZIP
- Texas Biotic Provinces Lines
- Texas Biotic Provinces Polygons
- Texas-Louisiana Boundary Line
- Texas-Louisiana Boundary Points - 1976
- Waterbodies - 24K
- Wildlife Management Areas
- State Park Boundaries