GIS for Transportation (GIS-T) is a broad expression that encompasses all of the activities that involve the use of Geographic Information Systems for some aspect of Transportation planning, management, or science. GIS-T applications can be used to monitor traffic accidents that have occurred in the past, or they can plan for changes in the transportation network design for the future. The breadth of the field of GIS-T provides ample opportunities for the development of new and innovative applications, and at the same time presents challenges to those who will try to integrate such diverse activities.[1]
The goal of this paper is to present a data model to design an Object-Relational geodatabase for Iranian roads network. This Transportation Data Model is designed as an 揺ssential?data model that provides a context within a GIS that can quickly and easily accept the input that from a wide range of users need in order to accomplish their transportation management goals. This model is specified in an industry-standard modeling notation calLED the Unified Modeling Language (UML), and is intended as a starting point for structuring transportation data. It is expected that the result of this endeavor facilitates the integration of several data models used in Iranian roads industry. Through a pilot project the establishment of such a context has been evaluated. The results of the pilot project are also presented in this paper. We hope to provide a data model that will act as a practical transition between th
