地理信息系统中图形数据的投影变换研究  

STUDY ON PROJECTION COVERSION OF GRAPHIC DATA IN GEOGRAPHICAL INFORMATION SYSTEM

作　　者：李红燕[1] 

机构地区：[1]中国科学院兰州沙漠研究所

出　　处：《中国沙漠》1996年第1期55-60,共6页Journal of Desert Research

基　　金：农牧交错带沙害遥感监测评价专题

摘　　要：投影变换是地理信息系统（ＧＩＳ）中空间处理的重要环节，根据ＧＩＳ中图形数据操作与分析，介绍投影变换的两种基本方法—反解变换法和数值交换法。反解交换法适用于两种投影的坐标公式较简单，较易求出两种投影平面直角坐标之间直接联系的情况。数值变换法应用范围较广，它可以避开较复杂的投影坐标公式的反解问题，求出两个不同投影平面场上点的对应关系。Projection conversion is an important link for spatial treatment in the geographical information system. Based on the graphic data operation and analysis in GIS graph, this paper presented two projection conversion methods - reverse solution conversion method and value convesion method. The former applies to those situations that the formulas of two projections are simple and easy to find out the direct relation of the plane rectangular coordinate. The latter has a wide application range and could avoid the reverse solution problems of some complicated projectioncoordinate formulas and find out the corresponding relations of the pointS on the two differentprojection planes.

关 键 词：GIS 图形数据 投影变换 

分 类 号：P9[天文地球—自然地理学]