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Texas Basemap - Transportation Map Data

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Type: Resource
Storage: The size of this resource is 1.8 GB
Created: Nov 02, 2023 at 9:44 p.m.
Last updated: Nov 03, 2023 at 2:03 p.m.
DOI: 10.4211/hs.ab3a463be73c4fd988a492b5d1b4c573
Citation: See how to cite this resource
Content types: Geographic Feature Content 
Sharing Status: Published
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Downloads: 16
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This resource contains statewide networks of roadways, railroads, bridges, and low-water crossings, for Texas only.

Roadways detail: The Transportation Planning and Programming (TPP) Division of the Texas Department of Transportation (TxDOT) maintains a spatial dataset of roadway polylines for planning and asset inventory purposes, as well as for visualization and general mapping. M values are stored in the lines as DFOs (Distance From Origin), and provide the framework for managing roadway assets using linear referencing. This dataset covers the state of Texas and includes on-systems routes (those that TxDOT maintains), such as interstate highways, U.S. highways, state highways, and farm and ranch roads, as well as off-system routes, such as county roads and local streets. Date valid as of: 12/31/2014. Publish Date: 05/01/2015. Update Frequency: Quarterly.

Bridges detail: As with the roadways, both on-system and off-system bridges are maintained in separate datasets (54,844 total bridges, 36,007 on-system and 18,837 off-system). Bridges have numerous useful attributes, see coding guide [1] for documentation. One such attribute identifies structures that cross water: the second digit of Item 42 “Type of Service”. If the second digit is between 5 and 9 (inclusive) then the structure is over water. The bridges datasets are valid as of December 2016.

The roadways and bridges datasets contained here were obtained directly from TxDOT through personal correspondence. An additional transportation data resource is the Texas Natural Resources Information System (TNRIS) [3]. The railroads and low-water crossings were obtained through TNRIS.

November 2023 updates: in the years since this data archive was first published, TxDOT has developed an open data portal for downloading their roadway inventory and other datasets. Also, in 2023 TNRIS was renamed as the Texas Geographic Information Office (TxGIO). Their datahub [3] is continually evolving, but still has the domain for now. We are not updating any of the basemap data in the contents list below, which was current at the time of Hurricane Harvey.

[1] TxDOT Bridges Coding Guide (download below)
[2] TxDOT Open Data Portal []
[3] TNRIS/TxGIO data downloads []

Subject Keywords



Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
North Latitude
East Longitude
South Latitude
West Longitude


Data Services

The following web services are available for data contained in this resource. Geospatial Feature and Raster data are made available via Open Geospatial Consortium Web Services. The provided links can be copied and pasted into GIS software to access these data. Multidimensional NetCDF data are made available via a THREDDS Data Server using remote data access protocols such as OPeNDAP. Other data services may be made available in the future to support additional data types.

Related Resources

This resource updates and replaces a previous version Texas Department of Transportation (TXDOT), Texas Natural Resources Information System (TNRIS) (2018). Texas Basemap - Transportation Map Data, HydroShare,
The content of this resource references TxDOT Open Data Portal []
The content of this resource references TNRIS/TxGIO data downloads []
This resource belongs to the following collections:
Title Owners Sharing Status My Permission
Harvey Basemap Data Collections David Arctur · Harvey datamgr · Christine Thies  Published Open Access


Funding Agencies

This resource was created using funding from the following sources:
Agency Name Award Title Award Number
National Science Foundation (NSF) RAPID: Archiving and Enabling Community Access to Data from Recent US Hurricanes 1761673


People or Organizations that contributed technically, materially, financially, or provided general support for the creation of the resource's content but are not considered authors.

Name Organization Address Phone Author Identifiers
Bridge Management Engineering Tom Yarbrough Texas Department of Transportation (TXDOT) Austin, TX
Transportation Planning and Programming Division Travis Scruggs Texas Department of Transportation (TXDOT) Austin, TX

How to Cite

Texas Department of Transportation (TXDOT), Texas Natural Resources Information System (TNRIS) (2023). Texas Basemap - Transportation Map Data, HydroShare,

This resource is shared under the Creative Commons Attribution CC BY.


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