应用数学模型推断地图上河流的选取程度

在评价地图的质量时,如果没有大比例尺地图相对照,传统上只能根据该图使用的地图投影、地图符号的规格化程度、制图时间、制图单位等标志间接推断,这种推断是极不可靠的。本文提出用要素分布的数学模型进行推断,并以河流为例,举出推断所用的数学模型及其使用方法,最后用实例验证,结果表明这种推断方法是可靠的。

To Infer the Selecting Degree of Rivers on the Map with the Mathematical Model

On assessing the quality of a map, in case no large scale map for comparison isavailable, fraditionally indirect inference is made with the help of the map projections,nomalization degree of map symbols, the time when it is mapped and mapping organi-zations, but the inference is not always reliable. This paper suggests that the inferencebe made using mathematical model of map feature's distribution. Taking rivers for exa-mple, this method and mathematical model used in the inference are discussed. Finallypractical examples are given to prove that this kind of inferring method is reliable.