Analysis of urban traffic system in north of Iran using GIS - A case study of Babolsar town


Dr. S. Lotfi
sedlotfi@yahoo.com

ArcGIS Transportation Data Model
The ArcGIS Transportation Data Model is designed to help in the development of transportation applications. It does so by providing a context within which a transportation system can be described, and assisting in the development of a geodatabase. The ArcGIS Transportation Data Model has a primary focus on the needs of organizations that manage road transportation networks (Booth and Mitchellet al, 2001) Here I attempted to understand and reflect transportation GIS for the present project to provide a practical, essential ArcGIS Data Model. A data model for transportation is necessarily complex due to the many and varied uses of transportation data (Brail and. Klosterman, 2001; Lee and Wong, 2001). For most urban organizations, management of their infrastructure with the purpose of reducing costs and improving customer service within their organization are very important. Transportation systems are unique in the sense that every land use and organization that interacts with the transportation network needs essential information about the transportation system(s) for their own routing, planning, and so on.

Implementing the ArcGIS Transportation Data Model
The following steps describe the process of designing the ArcGIS transportation data model:
  • The Analysis Diagram can be used as a template to make initial decisions about which objects to use and how to organize them into a logical structure that is appropriate for the applications being developed.
    • Both the Analysis Diagram and the UML Diagrams representing the ArcGIS Transportation Data Model were generated in the Visio 2000 Software Package. Exporting the UML to a Microsoft Repository within Visio 2000 Creating a new Personal Geodatabase in ArcCatalog in which the empty schema will be created. Once the empty geodatabase schema has been created the geodatabase must be populated with transportation related data before the ArcGIS Transportation Data Model can be implemented in an application.
Final result is a geodatabase that is used to managing the transportation network.

Conclusion
This paper introduced the ArcGIS transportation data model for Babolsar town network. The following conclusions can be made:
  • 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 ArcGIS Transportation Data Model is designed to help in the development of transportation applications. It does so by providing a context within which a transportation system can be described, and assisting in the development of a geodatabase.
  • The ArcGIS Transportation Data Model is takes advantage of the flexibility of Object Orientation to define entities and the relationships among those entities.
  • It showed that the arrangement of different urban land uses overlap each other and so create many traffic problems in the central areas of the town.
  • The research recommends the construction of a new belt-road in the southern part of the town to alleviate the volume of private vehicles entering the city centre.
  • The study revealed that the existing taxi stations are not distributed with respect of the volume of the travelers who cross the town in all directions.
References
  • ESRI (2001) ESRI and Regents of the University of California,"ArcGIS Transportation Data Model (Draft)", 2001.
  • N.S.C (2005) National statistical centre of Iran, Tehran. No 12 , pp 16-18.
  • Booth, B., A. Mitchell, et al. (2001) Getting started with ArcGIS : GIS by ESRI. Redlands, CA, Environmental Systems Research Institute.
  • Brail, R. K. and R. E. Klosterman (2001) Planning support systems : integrating geographic information systems, models, and visualization tools. Redlands, Calif., ESRI Press.
  • Hutchinson, S. and L. Daniel (2000) Inside ArcView GIS. Albany, N.Y., OnWord Press.
  • Lee, J. and D. W. S. Wong (2001) Statistical analysis with ArcView GIS. New York, John Wiley.
  • Miller, H. and Shaw, S-L. (2001) Geographic Information Systems for Transportation: Principles and Applications, New York: Oxford University Press.
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