基于富客戶端技術(shù)的地表覆蓋網(wǎng)絡(luò)化交互驗(yàn)證系統(tǒng)設(shè)計(jì)與實(shí)現(xiàn)
[Abstract]:As a product of human social and economic activities, land surface cover and change directly affect the surface environment and geographical landforms. They are the research of global change, the prediction of climate change, the assessment of ecological environment, the monitoring of geographical national conditions, etc. Macro-control analysis and other essential basic information. At present, land cover information is obtained from remote sensing images, then interpreted, mapped and posted online by professional technicians. Because of the complexity of the geographical environment and the diversity of the landforms, some images cannot confirm or even confirm errors, and it is not very realistic for professional and technical personnel to go to the scene, so it is necessary for the community to participate and interact with each other in order to complete the verification of the data. Can be used by users, for the purpose of serving the majority of users. In order to solve this problem, the focus of this paper is to collect samples, collect data, combine with the interactive verification system of surface covering network, provide a platform on the network for the participation of the public, exchange with each other, and jointly verify the reliability of the data. The following research work is done: (1) analyze the requirement of interactive verification system in land cover change information service, and point out the defects of traditional Web service model in change information identification, exchange interaction and data verification; Based on the analysis of the current research situation at home and abroad, the network means based on rich client technology, the analysis of verification data standard, the design of database and so on are put forward. (2) aiming at the problem of network communication and interaction, this paper adopts a framework based on rich client technology. The rich client technology and development are introduced and analyzed, as well as the contents included. Web2.0 technology plays an important role in supporting spatial blog, and it also solves the problem of interaction between users. (3) in view of the complex diversity of geographical and geomorphologic features, this paper puts forward a classification standard for the ground cover information, which can be divided into four categories: artificial cover, water body, cultivated land, bare land, forest, irrigation, grass; The typical morphology and image features of each class are analyzed, which provides a reference standard for verifying the data. (4) the database of this paper is divided into user authority database and authentication database in database design by using SQLServer2005, the user permission database adopts role-based access control method, E-RBAC model, user, role, user group, permission; In the design of the verification database, the user level, the source and the quality of the data are considered, and the extensible space is reserved to solve the verification problem of the surface coverage information. (5) based on the above research contents, a networked interactive verification system for surface cover is developed. Using Microsoft's Visual Studio2008 as the development platform and environment, ASP.NET and C # as the development language, realizing the network marking, map browsing, and the interaction between users, and taking the water body of Chaoyang Park in Changchun as an example. In the aspect of data verification, the better results are obtained, and the mechanism of professional and technical personnel participation is improved. The experimental results show that the surface cover networked interactive verification system with the participation of multiple users can clearly see the decrease of water body, as well as the reference comments and marks, and basically realize the verification of remote sensing data.
【學(xué)位授予單位】:吉林大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2013
【分類號】:P208
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