| Natural Zoning for Highways is the important basis of highway network planning and establishment of related specifications and standards. The establishment of the geographic information system of Natural Zoning for Highways (HZ-GIS) , the improvement of quantity and automation degree of Natural Zoning for Highways research and the enhancement of objectivity, scientific and accuracy of zoning result are important to the planning, construction and maintenance of road network.Base on the deep analysis of the research system, data and functional requirements of Natural Zoning for Highways research, analyzed and designed general structure and system integration development project in detail; completed the concept design, logic design and physical design of the spatial database of HZ-GIS according to the data requirement, put forward the scheme of the relation and object spatial database, realized the storage and management of massive data with the spatial data engine, aimed at structural characteristics of different basic data, established zoning index analysis model based on the raster data model and the theory of spatial variability, and completed terrain analysis, hydrological analysis and climatic analysis zoning basic analysis work; based on fuzzy clustering and rough set theory, established the analysis model of comprehensive zoning indices, and finished the analysis and calculation of the surface configuration index, difficult degree index of highway engineering and river runoff strength index, further studied the expression and drawing method of the thematic map of highway zoning, developed the zoning results publish system based on .NET framework and Web Service.Aiming at the structural characteristics of the raster data, established the zoning index analysis model of single feature based on raster data model; avoid the computing efficiency and scope limitation caused by using watershed as the calculation unit; based on the theory of spatial variability, established the zoning index analysis model of single feature to analyze the statistical data, realized the spatial quantitative analysis of the statistical data, overcome the dependence on other departments of Natural Zoning for Highways research; put forward the method to determine the influence coefficients of single elements in the analysis model of comprehensive zoning indices, eliminate the subjective effect brought about by expert estimation method used in zoning indices analysis beforetime; made the drawing scheme which was suitable for the thematic map of highway zoning, developed the zoning results publish system based on Web Service, and provided a more convenient way for publish and application of highway zoning results.The results of the analysis examples show that the establishment of HZ-GIS provides a systematic and integrated spatial decision support platform for research of. Natural Zoning for Highways, improved the automation and quantitative degree of zoning research, enhanced the objectivity, scientific and practicality of the highway zoning results. |
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