GIS Online Data

Note: The icons are offered as an attempt to provide useful information about data availability and website features. Our staff carefully surfed each website and, if available, downloaded and reviewed the retrieved data to confirm everything works fine. However, we do not have control over listed websites, and their content may change on an ongoing basis.



 GIS Download   Print Icon Brazos County
It offers dowloadable shapefiles of county and city limits, cemeteries, rivers and streams, railroads and roads, and PDF maps of roads and 100-year floodplain
  GIS viewer Print Icon Brazos County Appraisal District
This property search application allows the user to display a property, and retrieve its tax report. Our Library catalog holds the BCAD data from 2004-2012, available to review and copy at Map and GIS Collections and Services.
GIS viewer Bryan/College Station/Brazos County Flood Map Modernization
Interactive mapping service that offer a preliminary update of all flood insurance rate maps (FIRM) presented in a digital form. The final DFIRM will be available after the appeal process and the final determination is made.
  GIS viewer Print Icon City of Bryan GIS Map Services
A series of interactive maps services featuring aerials, streets, new developments, school districts, capital improvements, cemetery (ownership and grave location), census, garage sales and sex offenders mapping services among others
GIS Download GIS viewer Print Icon City of College Station GIS Department
It offers the most requested GIS files as well as some GIS maps in PDF format
  GIS viewer Print Icon Texas A&M Campus Maps Center offers a wide range of maps, sites and tools concerning our campus locations. One of the featured tools is the Interactive Aggie Campus Map, which offers the option to locate all TAMU buildings, bus routes, athletic facilities, landmarks and points of interest on campus
GIS viewer Print Icon

Texas A&M Facilities Coordination Interactive Maps
Texas A&M University's Office of Facilities Coordination (FCOR) provides and analyzes facilities and land use information to support the decision and planning processes of Texas A&M University and its many constituencies, which includes the TAMU System components headquartered at the College Station Campus and located state wide. The Aggie Map and a Riverside campus interactive map are offered.


GIS Download   Print Icon Capital Area COG GIS Information Clearinghouse (CAPCOG)
CAPCOG offers their most requested datasets at no charge as geodatabase, shapefiles and Google KMZ files. Datasets include airports, bridges, streets, city limits, contours, county boundaries, flood zone, Envision Central Texas (ECT) Model, Hydrography, Land Fragmentation Analysis, Landfills, Orthos (1997-2008), Parcels (2005, 2008), topos, vegetation, soils, etc. Maps and tabular data are also available
GIS Download     City of Austin GIS 
Provides aerials (1962-2008), address points, utilities, topography, land use, zoning, environmental, transportation, base maps and regional data. Data is mainly available as compressed zip folders with shapefiles format
  GIS viewer Print Icon City of Austin GIS Viewer
A web enabled map viewer to provide users with the ability to view the City’s GIS data and associated database information.  It offers general map viewing,  custom queries and printing capabilities


  GIS viewer Print Icon Dallas Central Appraisal District
It offers information of parcels by selection on interactive map, and parcel link to access appraisal account information (account history, market value, etc.)
GIS Download GIS viewer Denton Central Appraisal District
An interactive mapping service is offered to view datasets of parcel, contours, transportation, boundaries, floodplain, aerials from 2003-2009, and other useful layers. Most of those layers are available to download as compressed folders
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North Central Texas Council of Governments GIS Clearinghouse (NCTCOG)
NCTCOG serves as the GIS coordinator for 16-counties of North Central Texas, centered around the two urban centers of Dallas and Fort Worth.  This website offers fee-based digital geographic data for the NCTCOG region, as well aerial photography and digital elevation contours  available for purchase by its members at a much-reduced cost.
GIS Download Print Icon Tarrant County Appraisal District
Shapefiles and maps in PDF format are offered, covering themes such as parcels, county, city and school district boundaries, and hydrography among others.


GIS Download GIS viewer Print Icon City of Houston Geographic Information and Management System
GIMS consists of over 300 data layers and is a complex database. Part of the data is available only to City of Houston agencies, but also offers open accessible data to the public. ROW and bikeways data are available only to view, but not to download or e-mail
GIS Download GIS viewer   City of Houston GIS Release (COHGIS)
COHGIS data release contains most administrative boundaries, locations, routes, pavement, right-of-way, subdivision, and Lambert Facet Page (grids commonly used by Harris County Appraisal District and City of Houston Department of Public Works and Emgineering) datasets
 GIS Download   Harris County Appraisal District GIS Data
GIS Parcel and many appraisal related data: city, college, county, emergency, fire, highway, school polygons and many others. Current and historic parcel value data offered as text file, which can be imported to an access database with field names also offered.
  GIS viewer Print Icon Harris County GIS: Interactive Map Solutions
Interactive web-based map services that facilitate the display of Harris County data in conjunction with other geospatial data layers, to view Harris County amenities or data related to Precinct 2 Commissioner Sylvia Garcia
 GIS Download Harris County Public Infrastructure Department Engineering Division’s GIS Library
GIS data can be obtained by contacting the Harris County Public Infrastructure Department Architecture and Engineering Division GIS Group. 
GIS Download     Houston-Galveston Area Council Data Clearinghouse (HGAC)
It provides much of its vector data for free download.  The data are available in individual shapefiles to serve a wider variety of applications.  Most of the data covers only the H-GAC region; however, several are regional and statewide.
STAR*Map Data is available free of charge to TAMU students who are conducting research projects. Licensing restrictions apply. Please ask for the CD at Map and GIS front deskThe LibCat record provides more information.


GIS Download GIS viewer Print Icon Bureau of Economic Geology - BEG
It offers fee-based data such as annual reports and list of publications, papers. Free GIS database are available, including STATEMAP GIS Databases (selected areas),  and a set of interactive maps with its downlodable data of sequestration of greehouse gases in brine-formation database,  Texas Coastal Hazard Atlas, Texas Shoreline Change Project, and Sand Resources of SE Texas Continental Shelf.
Digital data is available with a fee, including digital quadrangle (DQ) Geologic Atlas of Texas on CD-Roms. Through STATEMAP Project Geologic Maps, black and white geologic maps of selected locations are offered for a fee
 GIS Download GIS viewer Print Icon Official Portal of Texas GIS Resources
It directs to the Railroad Commission of Texas' viewer for oil, gas and pipeline data. It links to the Texas Parks and Wildlife Department GIS Lab, which offers downloadable data in arc interchange and shapefile format, and a PDF map gallery. It directs to the Texas Water Development Board GIS Data, which offers maps, GIS data and interactive maps; TNRIS and StartMap GIS Data; and the Texas Commission of Environmental Quality GIS portal
GIS viewer Print Icon Public GIS Map for Oil, Gas and Pipeline Data
It offers detailed information and location coordinates for oil wells, gas wells, and pipelines from the Commission's files with base map data captured from U.S. Geological Survey 7.5 minute quadrangle maps
GIS Download GIS viewer Print Icon TAMU’s Texas Coastal Communities Atlas
It provides geographic information to help making informed decisions, and getting answers to questions for a specific area or topic that involves a geographic dimension. It allows identifying and visualizing critical issues related to numerous dimensions of development including environmental degradation, natural hazard risks, and significant changes in land use patterns. Layers available on the viewer are boundaries, policy data (coastal management zones and building code), transportation, census, rainfall, topography, ecological, hydrology, protected areas, recreation areas, development (property values, populated places, dams and wetland permits), natural hazards, coastal development, and offshore risk data. Some open access layers are available to download as shapefiles
    Texas Association of Regional Councils
A list of all 24 regional council of governments (COGs) in Texas. Commonly, COGs have a GIS department to produce and coordinate digital geographic data for their area of interest. Some COGS are more proactive in sharing data, but most likley all of them have some GIS data to share even if it is not posted online
GIS Download GIS viewer Print Icon Texas Commission on Environmental Quality GIS (TCEQ)
It offers a viewer dedicated to Eduard Aquifer.
It also offers a spatial queries mapping application (viewer) with SUPERFUNDS (Comprehensive Environmental Response, Compensation and Liability Act) and  MSD (Municipal Settings Designations) sites, and water wells data to help answer spatial queries including creation of spatial coordinates for point, line or polygon data. GIS Data for the Atlas of Texas Surface Waters, hydrology, site layers of current locational data in TCEQ Program Area, TCEQ regulatory/administrative boundaries, and Land Use Land Cover (LULC) layers are available to download
  GIS viewer Print Icon Texas Department of Transportation
A Statewide Planning Map application contains data of COGs, control sections, highways, imagery, Metro Planning Organizations (MPO), national highway system, railroads, traffic counts and Texas trunk system routes. Also, a county grid map is available to print out maps in PDF version
 GIS Download GIS viewer Print Icon Texas Legislative Council's District Viewer
It 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. All redistricting proposals that have been made public in the legislative process are available while they are under consideration.
GIS Download GIS viewer   Texas Natural Resources Information System (TNRIS)
TNRIS, through its Strategic Mapping Program (StratMap) maintains statewide digital geographic data. Data available at different geographic levels:
  • Statewide: bathymetry, StratMap boundaries, hydrological unit code (HUC) map, railroads, natural regions, airports, TX Gazeteer, LandSat, precipitation, USGS and satellite indexes
  • County level: Original Texas Land Survey (OTLS), FEMA Q3 Flood data, census, StratMap transportation (updated digital version from 7.5’ USGS Quads), TxDOT Off/On system and urban files, US Census Tiger data, digital raster graphic (DRG) county mosaics
  • Quad level: 24K, 100K and 250K DRGs, Digital Contours, 1:24K National Hydrography Dataset (NHD), elevation [Digital Elevation Model (DEM), National Elevation Dataset (NED) and hillshade], 250 K Geologic Atlas of Texas (GAT), SPOT  and DOQQ imagery
GIS Download   Print Icon Texas State Data Center and Office of the State Demographer
It offers reference and thematic maps on PDF format, and TIGER census and congressional district data
GIS Download GIS viewer Print Icon Texas Tech’s Digital Atlas of Texas Counties
It offers data of Texas Counties such as relief maps (JPEGs), boundaries, roads, populated places, hydrology, census data, satellite imagery, and DEMs
GIS Download Print Icon Texas Water Development Board
GIS datasets of various natural features defined by TWDB. Data offered as geodatabase or shapefile format. SMost requested maps are available as PDF/JPEG
GIS Download     TexMaps
Free Aerial Photos of the Texas Coast


GIS Download Print Icon American FactFinder – U.S. Census Bureau data
An online source for population, housing, economic and geographic data. Results from each of these data programs are provided in the form of data sets, tables, thematic maps, and reference maps
GIS Download ArcGIS Onlin
It provides access to free online map services, map layers and documents, and tools such as geocoding and routing, to use in your GIS work.  The content includes several online maps such as multi-scale imagery, street maps, topographic maps, shaded relief, and demographics.  It also includes packaged data layers and map documents that you can download for local use, and open directly on your ArcMap work.
GIS Download CropScape
Cropland Data Layer (CDL) avaiable from the USDA. The CDL is a raster, geo-referenced, crop-specific land cover data layer created annually for the continental United States using moderate resolution satellite imagery and extensive agricultural ground truth.
GIS Download Print Icon DigitalCoast 
NOAA’s team prepared GIS data of counties, states, boundaries, watersheds, shorelines, etc. to create the National Coastal Assessment Framework (CAF)
GIS Download DataFerrett - U.S. Census Bureau's Data Federated Electronic Research, Review, Extraction and Tabulation Tool 
A data mining and extraction tool that allows you to select a databasket full of variables and then recode those variables as you need in the form of table, chart, graph or map. It can be installed as an application on your desktop or accessed via internet browser. It offers a wide range of data topics, including census, economic, health, income and unemployment, population, labor, cancer, crime and transportation, family dynamics, vital statistics, etc.
GIS viewer Print Icon EPA’s EnviroMapper
A powerful tool used to map various types of environmental information, including air releases, drinking water, toxic releases, hazardous wastes, water discharge permits, and Superfund sites
GIS Download EPA Geospatial Data Access Project  Information regarding facilities or sites subject to environmental regulation. It provides downloadable XML, KML, and shapefiles, as well as feature classes. Datasets include Superfund National Priority List (NPL); EPA and State Treatment, Storage, Disposal facilities; Toxic Release Inventory System; National Pollutant Discharge Elimination System (NPDES) Majors; Large Quantity Generators; Air Facility System, Corrective Actions; etc.
GIS Download GIS viewer Print Icon EPA C-MAP  Clean Air Mapping and Analysis Program
A GIS assessment tool used to evaluate the benefits of national and regional pollutant emission reduction programs. The Clean Air Market Division is using this geographic data to assess the environmental effectiveness of the Acid Rain Program

GIS Download Federal Communications Commission
Provides FCC licensing data, regulated towers and market area boundaries, including Cellular, Antenna Structure Registration, AM and FM databases

only statistical

Gateway to Statistics from over 100 agencies. It provides access to the full range of official statistical information produced by the Federal Government. No GIS data is provided
GIS viewer
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JPEG, PDF or Tabular data
Justice Atlas of Sentencing and Corrections
Interactive mapping service hosted by the Justice Mapping Center. This atlas provides access to data concerning residential distribution of people involved in the criminal justice system.  It uses aggregated address data to map the flow of people being removed to prison, reentering communities from prison, and the standing population concentrations of people under parole or probation supervision. It allows to export data in excel format, as well as maps in PDF or JPEG files.
GIS viewer statistical
ICPSR's Historical, Demographic, Economic, and Social Data: The United States, 1790-2002
Inter-university Consortium for Political and Social Research offers this census data collection that contains detailed county and state-level ecological and descriptive data for the United States for the years 1790 to 2002. Texas A&M University is a member of ICPRS, therefore TAMU community have direct access to download data by creating an account using the e-mail.
Using  data from previous ICPSR's study (1790-1970), the University of Virginia, Geospatial and Statistical Data Center created a web-based Historical Census Browser that allows to examine state and county topics for individual years or over time, presenting the data in tabular or interactive map form.
only statistical
Access to statistical publications & datasets produced by Federal agencies, states, and intergovernmental organizations with its advanced Search Tables functionality
only statistical
Minessota Population Center (MPC)
The world’s leading developer of historical and international census data, and disseminates population data to thousands of teachers, researchers, and policy makers. It offers historical census samples for the United States, developed innovative tools for the electronic dissemination of demographic data, and improved the comparability and documentation of census microdata across time and space. No GIS data is provided
GIS viewer NASA Global Change Master Directory
It offers a comprehensive list of GIS and Geography related websites. It includes link categories such as U.S. federal Agencies, professional Organizations, Universities and Research Institutes, and Commercial or Open Sources. The website allows finding datasets by topic , each one with a detailed description and its geographic coverage. Datasets are presented through Web-based and  Desktop GIS interfaces
GIS Download National Historical Geographic Information System (NHGIS)
Provides, free of charge, aggregated census data and GIS-compatible boundary files for the United States between 1790 and 2000. The geographic units offered are state, county, county subdivision, census tract, block, block group, MSAs, place, voting district, zipcode, congressional district, etc. Data can be downloades in ASCII, SPSS, SAS, STATA command file formatting and comma or GIS comma-separated, column-delimited and shapefiles data formats. 
GIS Download GIS viewer Print Icon National Map (USGS)
The Nation’s Topographic Map for the 21st Century—Access to high-quality, geospatial data and information from the USGS as well as other Federal, State, and local partners. It includes orthoimagery, elevation, geographic names, hydrography, boundaries, transportation, structures, and land cover. It offers several interactive viewers
  • National Map Viewer: It contains data sets from many contributing agencies

  • USGS TopoView Beta: TopoView offers access to JPEG's, GeoTFF's, KMZ's, and GeoPDF's of the USGS's Historical Togographic Map Collection. 
  • National Map Seamless Server: It  is the primary site to download USGS imagery, elevation and land cover data
  • National Map ‘Best Practices’ Viewer: It offers the most up-to-date National Map road, boundaries, structures and other vector data
  • National Hydrography Data (NHD) Viewer: It contains the most up-to-date hydrography digital spatial data such as lakes, ponds, streams, rivers, springs and wells. It offers data extraction on medium, high or local resolution, delivered as personal geodatabase, file geodatabase, or shapefile
GIS Download GIS viewer Print Icon National Renewable Energy Laboratory (NREL)
The site provides dynamically-generated maps of renewable energy resources. It also offers downloadable GIS data and geospatial toolkits via FTP.
GIS Download National Transportation Atlas Database
A set of national geographic databases of transportation infrastructure and facilities
GIS Download Newberry Libraries' Atlas of Historical County Boundaries
It offers a complete atlas for each state: a master shapefile (polygons), metadata, comprehensive database, and historical chronologies. KMZ files also available.
GIS Download GIS viewer NOAA's Historical Hurricane Tracks offered by the Coastal Services Center. It is an interactive mapping application that displays and offers tropical cyclone data of both Atlantic and Eastern North pacific basins
GIS Download GIS viewer Print Icon NOAA's National Climatic Data Center
The world's largest active archive of weather data gives access to its climate information. The center develops both national and global datasets. The website offers vast array of datasets, an easy way to extract the data is using the GIS Map Services Index.
GIS Download GIS viewer Print Icon NOAA’s National Geophysical Data Center
It offers a vast array of Interactive maps with data from the Sun to the Earth and Earth's sea floor and solid earth environment, including Earth observations from space. It offers developed software and conversion tools as well as downloadable shapefiles extracted from interactive maps

Tabular data

A directory database of 12,000,000 U.S. businesses from local sole proprietorships to Fortune 500 corporations. Searches include company name, business size, corporate linkages, SIC / NAICS, and very detailed geographic information.The ReferenceUSA database contains information on more than 12 million U.S. businesses. The following tutorials are very useful to learn how to extract the desired data and convert it as shapefiles

GIS viewer Tabular data Social Explorer
Web-based interface that offers easy access to U.S. demographic information, including historical data back to 1940
GIS viewer Print Icon Southern Forests for the Future
Interactive map that offers data with themes such as forest cover gain/loss, composition, ownership, fragmentation or suburbanization among others.  Project study area stretches from Texas across to Virginia and from Kentucky down to Florida, which comprises 29% of total forestland in the US. to 
GIS Download TIGER - U.S. Census Bureau's
Topologically Integrated Geographic Encoding and Referencing System
It offers digital geographic data (shapefiles) for the United States. Legal and statistical geographic areas are offered, as well as features like roads, railroads, rivers, etc. The shapefiles do not include demographic data, but they contain geographic entity codes (i.e. FIPS) that can be linked to U.S. Census demographic data available at American FactFinder.
Cartographic Boundaries of 1990, 2000 and other selected years are available to download
GIS Download U.S. Fish and Wildlife Service’s  Branch of Data and Systems Services
The data are at various scales ranging from 1:12,000 to 1:500,000. They are organized by state with source, theme, spatial coverage, scale, metadata and data link information available for each item. It also offers data from other agencies, such as the FAA's Wind Turbine Location Data.
GIS Download GIS viewer email USDA Geospatial Data Gateway
Provides one stop shopping for natural resources or environmental data. The Gateway allows you to choose your area of interest, browse and select data from our catalog, customize the format, and have it downloaded via FTP site or shipped on CD or DVD. The link to download you data request is normally e-mail to you after few business hours, therefore try to plan in advance your data acquisition. Themes include orthoimagery, soils, common land unit, cultural and demographics, geographic boundaries and places, elevation hydrography, cadastral, transportation, digital raster quads, land cover/vegetation/plants, watershed boundaries, wetlands, precipitation and temperature, flood hazards, national inventory of dams/water control infrastructures.
GIS Download GIS viewer Print Icon USDA Web Soil Survey 
Provides soil data and information produced by the National Cooperative Soil Survey. It is operated by the USDA Natural Resources Conservation Service (NRCS) and provides access to the largest natural resource information system in the world, including soil maps and data for more than 95 percent of the U.S. counties. The electronic version of published soil surveys can be accessed here
GIS viewer Print Icon USGS 15" Topo Index
Created by Illinois State Library's Map Librarian, listing sources from where to find digital historic 15" topos for all U.S.
GIS Download USGS 7.5" Topo Maps in KMZ by Google Earth Library
This collection offers over 50,000 7.5-minute USGS topographic maps to view in Google Earth.
GIS Download WebGIS
Free access to terrain, Land Use Land Cover (LULC) and Digital Line Graphs (DLG) data
Please contact the Map & GIS Library if you have any question, identify a broken web link, or want to suggest a website to be added.