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Abstract
Routing using GIS with Consideration of Environmental Regulations, A case study: Parchin Road
Homa Ahmadi, Ali A. Darvishsefat
Tel: (0098)-(0311)-(2654258)
Email: homa_ahmadi@yahoo.com
Abstract
Population growth and increasing of urbanization have led to the increase of demand for development of new roads. Population density and heavy traffic in Tehran city put pressures on transportation, and this cause an obligation in providing a ring-way structures at the east of Tehran.
The main goal of this project is to provide a method to determine optimum route with consideration of environmental issues.
There are many issues that must be addressed in selection of optimum route for a road. Some of the most important factors, which were considered in route selection for Parchin road are:
geology characteristics, soil erosion, slope, land use/cover, streams, faults and hipsometery.
In this study, factors and constraints were classified and then used in pair-wise comparison method to determine weight of map layers. To do this, the opinions of some experts were collected via some questionnaries, and then the results were integrated. These results were entered to Multi-Criteria Evaluation (MCE) module to create final suitability and friction maps.
Considering several sources and using two GIS packages (Idrisi & Ilwis), different route alternatives were resulted by different weightings. These routes were compared together and with existing Parchin road.
Finally, the optimum route was selected through Analytical Hierarchy Process (AHP). The results demonstrate the ability of Geographical Information Systems for route selection with environmental considerations.
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