Census boundaries, cultural features, elevation, environmental data, hazards, hydrologic data, land cover, and other GIS datasets for the Houston and Galveston area, prepared specifically for use in GIS.
City of Houston Department of Public Works & Engineering interactive GIS map with dozens of downloadable layers including landbases &roads, water lines & devices, structures & footprints, floodplain data, and natural features
From the Texas Commission on Environmental Quality, links to the Atlas of Texas Surface Waters, data for Level 4 ecoregions, GIS data for classified segments, and other hydrology data layers for use in ArcGIS. Statewide hydrography maps and map-based viewers for surface water information.
Displays interactive maps and demographic and election reports for current state house, state senate, Texas Congressional, and State Board of Education districts, as well as selected redistricting proposals. Has downloadable PDF reports, maps, and Esri shapefiles.
The TxDOT Open Data Portal is the agency’s platform for exploring and downloading GIS datasets. The portal allows users to view datasets on a map, filter data using queries, and download data in various formats.