Geographic Information Systems (GIS) have long been recognized as a valuable tool for the representation and analysis of transportation networks and related activities. GIS have proven to be an integral tool in addressing the needs of transportation managers. Through the well-established vector data structure, GIS has provided an efficient means for organizing basic transportation related data in order to facilitate the input, analysis, and display of transport networks.
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.
1. Introduction
Geographic Information Systems (GIS) have long been recognized as a valuable tool for the representation and analysis of transportation networks and related activities. GIS have proven to be an integral tool in addressing the needs of transportation managers. Through the well-established vector data structure, GIS has provided an efficient means for organizing basic transportation related data in order to facilitate the input, analysis, and display of transport networks.While these basic objects are necessary for vir
