矢量数据多尺度显示中的关键技术  

Key Techniques in Multi-scale Display of Vector Data

作　　者：牛方曲[1] 甘国辉[1] 程昌秀[1] 祁铮[2] 

机构地区：[1]中国科学院地理科学与资源研究所,北京市100101 [2]中国农业大学理学院,北京市100083

出　　处：《武汉大学学报（信息科学版）》2009年第7期869-872,共4页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金资助项目(40401047);国家“十一五”科技支撑计划资助项目(2006BAD10A05)

摘　　要：针对矢量数据多尺度显示中的若干常见关键技术问题进行了讨论,并提出了相应的解决方案,同时结合具体的研究实例进行了实验,较好地实现了利用离散尺度模拟无级比例尺显示。In multi-scale display of vector data, it is very troublesome to decide the criterion of small objects, the sequence of scale values, and so on. In order to solve these key problems mentioned above, we discussed some key techniques and gave corresponding solutions. Based on the techniques discussed here, a demonstration was built. The experimental system used an extended GAP-tree index to realize the multi-scale display of vector data. The discussion about these key techniques problems will contribute to the research on the multi-scale display in GIS.

关 键 词：多尺度 像素面积 综合矩形框 尺度采点 

分 类 号：P208[天文地球—地图制图学与地理信息工程]