Geographic Information System (GIS)

Welcome To GIS

The GIS Section, located in Headquarters Transportation Systems and the central GIS group for all of The Idaho Transportation Department. We support all Divisions within ITD including Transportation Performance, Division of Motor Vehicles, Aeronautics, and Highways.

We have three distinct functions within the GIS Section:

  • Digital Mapping/Data. The GIS Group maintains and makes available statewide GIS datasets in support of all ITD Divisions. We maintain all enterprise GIS data in a Spatial Database Engine data store in a SQL underlying database. We support, build, and maintain enterprise, GIS enabled applications, data, and websites, both internal and external.
  • Local Roads Program. This program collects information from all local Highway Districts and County Road and Bridge Groups regarding miles of improved local roads that they maintain and are responsible for. This information is checked and entered into our GIS system. Annually we produce a certification of these mileages for the Department Director's signature. This certification is then used throughout the following year to distribute State Highway Distribution Account monies to each of the local jurisdictions on a quarterly basis.
  • Linear Reference System. The GIS group maintains and updates a temporal Linear Reference System (LRS) for the Highways Division. The LRS defines a unique identifier and mile points for location of all sections of covered roads and highways throughout the State of Idaho. Milepoint Log is maintained as part of the LRS system.