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以概率论为工具解析地研究了误差椭圆的2个重要性质,在此基础上分别为点、线及多边形建立了由椭圆和线段组成的置信域,并给出了所建置信域与其置信水平的关系。最后通过算例讨论了置信域的可视化表示问题。

Constructing confidence regions for points, lines and polygons is one of the most useful ways to express the uncertainties of these fundamental factors in GIS. The efficiency of a confidence region depends chiefly on its area and shape. Generally, a confidence region with small area is more effective than that with a large one on condition that they satisfy the same confidence level. With the view of applications, the analytic expressions of the regions should be as concise as possible. This paper aims at m...