Research And Implemention Of Remote Sensing Data Visualization Model Based On Open Source WebGIS

In recent years, with the rapid development of aeronautics space technology, remote sensing surveying and mapping technology, the application of remote sensing data has infiltrated into different industries of the social construction. Along with the deepening application requirement of industries, it has become a hotspot in experts and scholars of related fields that how to organize the massive remote sensing data which increases exponentially effectively everyday and improve the sharing quality. The traditional remote sensing data sharing service has a low quality of data visualization and user interacting, a high cost and complex structure.It has bad effect on the service quality, and will limit the speed of application evelopment. Under this background, this paper put forward a kind of implementation method of remote sensing data visualization which is designed to improve the service effect based on open source Web GIS combined with flexible structure and good spatial geographic features.The main contents and key research points of this paper as follows:1. Investigation and research on the basic theory and related technology of remote sensing data visualization. This paper makes a research basic theory of WebGIS, analyzes its implementation strategy, mode and characteristics, and studies the features of GeoServer, PostGIS/PostGIS, Open Layers and other open source WebGIS software. Then, it describes the related theory of tile map cache mechanism and its characteristics.2. A kind of three layer structure of remote sensing data visualization model based on OpenSource WebGIS. Based on the study of relevant technology and theory, this paper builds the main body of the system model useing J2 EE technology. It makes a integration of resources, such as database, map service, image files, building based on open source software, combined with the WebGIS client, to presentation the "data, logic, said" three layers structure.3. Research and implementation of key technologies. This paper researches and designes the map service, which is builded with the pre segmentation tiles combined the dynamic map services in order to improve the efficiency of client map loading, based on buffer strategy. Then, it puts forward a thumbnail preview online mapping algorithm based on OpenLayers. At last, it researches the design and implementation of the method that make a interaction between data list and map elements.4. Application in the actual system. Application of the system model and key technology in the actual system. By describing the application of system model and key technologies in a actual system, it demonstrates the feasibility and flexibility of design scheme, summarizes and analyzes the effect and significance of the research works on improving the effect and quality of remote sensing data sharing service.