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Research on Real-Time Performance in Marine Environment Monitoring Information Publication System Based on Embedded WebGIS

Author: WangXingQiang
Tutor: JiaZhiPing
School: Shandong University
Course: Computer System Architecture
Keywords: Marine monitoring Embedded WebGIS Progressive transmission COSA
CLC: TP319
Type: Master's thesis
Year: 2009
Downloads: 190
Quote: 0
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Abstract

In various coastal countries continue to increase efforts to develop marine resources, marine pollution levels are worsening, leading to increasing frequency of harmful algal blooms disasters, the increasing scale of increasingly long duration. Harmful algal blooms frequently had a serious impact on our coastal marine ecological environment and result in enormous direct and indirect economic losses. Therefore, there is an urgent need to develop effective marine environment online monitoring and disaster intelligent early warning system, and to establish real-time reliable network of marine monitoring acquisition, the disasters data analysis and information dissemination system, has become a safeguard maritime rights and interests, the development of marine resources, warning marine disasters, protection marine environment, an urgent requirement to seek new development space. This article in the context of marine monitoring and disaster warning project topics, primarily for the marine environment, marine environment monitoring and disaster intelligent early warning system monitoring information embedded WebGIS release subsystem, using B / S network architecture, combined with monitoring stations the embedded environment, with the release of real-time techniques and strategies taken from monitoring acquisition and information mining research, to provide protection for the realization of the real-time ocean monitoring and disaster warning information released. The paper first introduces the topic background and significance of the subject, as well as domestic and international marine environmental monitoring technology development, and given the structural arrangement of the papers. Then introduces the overall architecture of the online monitoring system of the marine environment as well as data monitoring, data management, model analysis, the basic functions of the four subsystems of data products. Then describes the architecture design and the key technologies of the information release system for marine environmental monitoring. Monitoring and information dissemination system using browser / server three-tier network architecture, responsible for responding to the request for information of the user's browser to send a corresponding request for information to the data center, storage and data center in the GIS database server embedded vector electronic map the spatial data, and monitoring data stored in the historical database, server and data products and product information, and monitoring data provided by the local embedded database extraction, classification, packaging, processing and GIS services to meet information visualization needs of the client browser. Judging from the spatial location of embedded WebGIS information dissemination system, located on top of the monitoring stations are in the center of the whole monitoring system is user-oriented visualization platform for information dissemination; from functional structure point of view, it is the user data play the role of a \Therefore, marine environmental monitoring information embedded WebGIS System for real-time performance for the performance of the whole monitoring system plays a key role. Information release system data structure, encapsulation, transmission and visualization release given GIS data structures embedded in the system, based on the collection of XML data compression, based on the GML monitoring data encapsulation, based on SVG visual publishing and other key technologies, and the use of these technologies to improve the system's real-time are discussed and demonstrated. Finally, the paper gives a progressive transmission of vector data embedded network environment policy and a real-time information mining for red tide monitoring data clustering algorithm. The former is in-depth discussion of progressive transmission of vector data model based on the improved multiple search tree variants tree hierarchical search tree as incremental storage model, applied to embedded monitoring stations WebGIS information release system Progressive vector data transmission, to improve the real-time the visualization system information released, and effectively conserve bandwidth. The latter is for the different sizes of the red tide monitoring elements occurrence of red tide, and even some information overlapping features a real-time based on the attributes weighted distance of the red tide monitoring data clustering analysis algorithm, and applied to the data monitoring data center disaster information mining, real-time and accuracy of information mining.

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