Methods Of Selecting Road Route Intelligently Based On GIS

In recent years, the construction of highway in our country develops very quickly.During the "-12thFive-Year Plan-" period, a lot of roads are planned to be built. Inthis context, a new round of construction is about to begin, and the designers areunder a lot of pressure on the duration and technical requirements. Road line selectionis the basic and important work of road construction, because it directly affects theentire road construction costs as well as the economic value after the completion ofroad. Therefore, how to select a route which technically feasible, economicallyrational, and can meet the user’s requirements, has important social and economicsignificance.In this paper, the intelligent line selection methods of road are studied, and theproblem is formulated as a shortest path problem based on raster data. The researchwork is as follows:①Through the analysis of various factors which can be affect the route selectionthoroughly, select the topography, geology and surface features as the main factors inintelligent road selection. Elevation and slope are considered as two importantelements in terrain factor.②Using the AHP method and expert consultation method to determine the weightsof the route selection factor, and utilize the digital terrain model, digital surfacefeatures model and digital geological model to doing the overlay analysis. Establishroad comprehensive cost distance model by using this method, finally use ARCGISspatial analysis function to obtain the best route.③The whole line selection process was finished by computer calculationautomatically, which achieved the requirements of intelligent line selection. Throughthe test and analysis of line selection, proved that the method is feasible.