A GIS based route determination in linear engineering structures information management (LESIM)
Yildirim, Volkan, Recep Nisanci and Selcuk Reis
Linear Engineering Structures (LES) such as roads, natural gas-oil pipelines, irrigation-drying channels, power lines and railways cover larger areas than other technical infrastructure facilities. Because of the need of route selection, linear engineering structures require strategic planning, evaluation and management. The operations to choose optimum route depends on the effective collection, processing, storing and analysis of spatial data such as topography, vegetation, geology, soil type, land use, and landslide areas about land. This situation requires to use of Geographical Information Systems (GIS) by providing effective data management. In LES information management, spatial data belonging large study area are especially collected via Remote Sensing (RS) easily. In this context, using raster network analysis has some advantages for route selection operation with the assistance of these data. In literature, it is seen that, route selection operations of LES are determined optimally with the minimum cost. But, in some developing countries, route selections of linear engineering structures are determined via classical method on medium scale topographic maps and only slope data is taken into consideration. In this route selection operation, because of spatial data belonging land use is not used in many points route is changed and this causes an increase in the cost. Consequently, in these situations it is necessary that GIS based dynamic models have to be designed for LES information management. In this study, types of issues faced are determined for LES in route selection in developing countries and the needs of raster network analysis to solve these issues are investigated. In this respect, a model with pilot application is formed for natural gas pipeline route selection operations in a selected area in Turkey.
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