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《Geospatial Information》 2007-02
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Algorithm for Building Oceanic Pollution Distrubution Isoline Based on the GIS

MA Weichun1,CUI Xianguo2,YUAN Changfeng2 (1.Basic Mapping Information Center, Anhui Mapping Department, Hefei 230031, China; 2.College of Geo-Information Science and Engineering, SUST, Qingdao 266510, China)  
Combing the method of triangulation web with the process of drawing distribution isoline of the oceanic pollution , and introducing a new view based on the distribution characters of the coastline and oceanic pollution monitor sites , that is taking the advantages of the AcitiveX control - MapObjects ,which has powerful map analysis ability, to draw oceanic pollution distribution isoline on it. At the same time using the technique of maplayer which is included in the GIS into the process of ocean and land's crossing area isoline cutting , which can both guarantee the drawing precision and avoid a mass of and complex mathematical calculation ,which can not be avoided if using the traditional computer graphics cutting method, increase the speed of drawing obviously.
【Fund】: 国家科技部“863”计划——渤海海洋生态环境海空准实时综合监测示范系统资助项目(2002AA634030)
【CateGory Index】: P208
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