基于WebGIS的水土保持區(qū)劃輔助分析系統(tǒng)設(shè)計(jì)
[Abstract]:Soil and water conservation zonation is the basis of soil and water conservation planning, and it is a comprehensive geographical regionalization which needs to consider many natural and social factors. It can point out the direction of planning and the overall layout of soil and water conservation measures. With the development of soil and water conservation information, "3s" technology is more and more widely used in soil and water conservation regionalization, which provides data support, spatial analysis method, output of results and network media for regionalization. WebGIS technology is an important development direction of GIS. This technology can realize real-time data acquisition, management, analysis, edit update and multidimensional visualization based on network. It has flexible and advanced technology, cross-platform compatibility, efficient operation and low cost of system construction. Easy to publish and share information and other advantages has become a new technology hotspot in the development of soil and water conservation information. At present, the application of this kind of technology in the field of soil and water conservation is concentrated on watershed information management, the construction of thematic database and the construction of information platform for soil and water conservation monitoring. Under the technical background of digitization of regionalization data, the study of this kind of system is helpful to the flexible transfer of network resources, reduce the cost of regionalization, and conform to the trend of soil and water conservation information development. This system is based on the "Xi'an soil and Water Conservation Planning" project, using WebGIS technology to extract the system requirements from the more complex spatial analysis process during the implementation of the project. The goal orientation is to assist the division worker to realize the most analysis items of the division efficiently based on the REST style network space analysis service, and to assist to carry on the division plan decision and the division result output. On the basis of requirement analysis, the overall design of the system function module is carried out. The whole system is divided into 8 modules groups. The functions cover the loading of regional-related analysis data, query, cross-platform data editing, digital terrain analysis, etc. Basic image processing and information retrieval, gully density analysis and hydrological analysis, database and server-side resource management, data visualization and custom layout output, etc. The physical realization of the system is to use ArcGIS for JavaScript API 3.16, Dojo frame, JavaScript as the design language, and the server software to use ArcGIS for Server 10.3 to call the geographic analysis service on the server side. Part of the function module of regionalization characteristic analysis realizes writing script tools based on Arcpy and issuing calls. Finally, the special topic WebGIS. of soil and water conservation zonation analysis is constructed. According to the system aided zoning analysis and zoning scheme, the soil and water conservation regionalization of Xi'an is divided into 8 districts, which are basically consistent with the previous achievements except that the urban soil and water conservation is divided into separate areas. The operation shows that the system can be run on various browser platforms, the design of spatial analysis function module is scientific, the user experience is good, and the system can release resources based on browser platform and server. The analysis efficiency is high, which is helpful to determine the partition boundary, to provide data support and information management, to share, to publish the platform, and to output the system result including thematic map. Table data and statistical chart, can achieve the system requirements analysis phase of the functional design.
【學(xué)位授予單位】:西北農(nóng)林科技大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:S157;S127
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