On the basis of analysis of sterical view, the maximum mappable unit in sterical view on a fixed viewpoint is studied According to the sterical projective principle, a series of formulas have been deducted with diagrams so as to obtain a directdrawing of maximum mappable unit in sterical vie
从分析体视视野着手，研究固定视点体视图的最大图幅。
In this article,the authors discuss line primitives of a digital map,design a sort of data joint structure on a multi-sheet map,and realize a logical join of a multi-sheet digital map,so that GIS can be used for analysis and application in an even wider range of geographic information.
随着数字地球的发展,传统的以图幅为单位的GIS应用模式已满足不了实际应用的需要,本文以数字地图的线要素为研究对象,通过数据拼接结构的设计,研究了一种多图幅数字地图逻辑拼接显示的新方法,从而使GIS能够在更广阔的地理信息范围内进行分析应用。
Simplified and automatic map merging functions were implemented by using component programming.
针对图幅接边中存在的问题和难点,提出了一套基于索引图多幅大比例尺地图自动接边的方法,采用了组件式编程方法,实现了简单化和自动化图幅接边的功能。
