Texas Basemap - Transportation Map Data
|Authors:||Texas Department of Transportation (TXDOT) · Texas Natural Resources Information System (TNRIS)|
|Owners:||David Arctur · Harvey datamgr|
|DOI:||10.4211/hs.106b38ab28b54f09a2c7a11b91269192 How to Cite|
|Resource type:||Composite Resource|
|Created:||Apr 17, 2018 at 9:50 a.m.|
|Last updated:||Nov 27, 2018 at midnight by David Arctur|
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  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 alternate resource that is more open is the Texas Natural Resources Information System (TNRIS) . The railroads and low-water crossings were obtained through TNRIS.
 TxDOT Bridges Coding Guide (download below)
 TNRIS data downloads [https://tnris.org/data-download/#!/statewide]
Texas Department of Transportation,Railroads,Streets,Railways,Highways,Texas Natural Resources Information System,TxDOT,Roads,TNRIS,Basemap,roadways,routes,on-system,off-system,GIS,Route,Highway,Centerline,Routed Centerline
How to cite
This resource is shared under the Creative Commons Attribution CC BY.http://creativecommons.org/licenses/by/4.0/
|Coordinate System/Geographic Projection:||WGS 84 EPSG:4326|
|Coordinate Units:||Decimal degrees|
|Texas Department of Transportation (TXDOT)||Austin, TX|
|Texas Natural Resources Information System (TNRIS)||Austin, TX|
|Tom Yarbrough, Bridge Management Engineering||Texas Department of Transportation (TXDOT)||Austin, TX|
|Travis Scruggs, Transportation Planning and Programming Division||Texas Department of Transportation (TXDOT)||Austin, TX|
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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|
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