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Transportation data model implementation for Iranian roads network
Somayeh Dodge M.Sc. Student, Dept. of GIS Eng. Email: s2dodge@yahoo.com  Ali A. Alesheikh Assistant Professor, Dept. of GIS Eng. Email: alesheikh@kntu.ac.ir Faculty of Geodesy and Geomatics Eng., K.N. Toosi University of Technology Vali Asr St., Vanak Sq., Tehran, Iran, Post Box: 15875-15433 Fax: +98 21 878 6213 Tel: +98 21 877 9473-5 Abstract: 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 “essential” 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 virtually all transportation applications, they are not sufficient for any comprehensive management or planning process. It has become increasingly obvious that a much wider range of transportation related objects are essential for advanced transportation planning and management tasks. 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 “essential” 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 the user’s application of transportation data and the standards that have been implemented in the creation of that data. We hope to support the standards that play an integral role in defining the transportation GIS community. In recent, the ArcGIS TM transportation data model has designed for NewYork. We aimed to develop this data model for Iranian roads network.
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