Research And Implementation Of Path Analysis Based On GIS Technology

With the successful launch of GF-1, space information industry in our country has been further developed. The application of GIS has gradually extended to some domains such as land resources, urban path planning and military affairs. Network analysis is one of the most important functions of GIS, and path analysis is the most basic problem in network analysis. Path analysis algorithm and image preprocessing quality influence the performance of path analysis system. Therefore, the research of path analysis has important significance in tourism, transportation, network layout and so on.The basic map of the system is GF-1 image of Quyang County. We establish the model of Quyang County using ArcGIS Desktop. The common shortest path algorithms are analyzed. Finally, Dijkstra algorithm is chosen as the shortest path algorithm for traffic path topology. We realize the optimization of Dijkstra algorithm and reduce the memory space by improving of the storage structure of the path model data, especially for large data network model. This system is based on ArcGIS Engine component library, and the language of development is C#. By choosing the starting point and destination, the shortest path search analysis of the Quyang County’s path network is conducted. The node information and the total weight of the shortest path are given. The system realizes the simulation of the car driving. The realization of the system has practical significance in traffic field.The high resolution image with color information is obtained by preprocessing. The preprocessing includes orthorectification, registration, fusion and so on. Combined with SQL Server database, the path analysis system which meets the requirements is completed.