单指标专题要素图解分级方法试验研究

本文结合常规制图作业,论述了可用于确定单指标专题要素统计数据分级方案的四种图解分级法,即散点图法、直方图法、坡度曲线法及剖面线法的基本理论,以人口密度为例进行了具体分级试验,结果表明,应用图解分级法确定的单指标专题要素统计数据的分级方案,具有规则的分级界线及分级间膈.

Trial Study on the Graphic Classification Method of the Single Index Feature of Thematic Map

With the conventional mapping work,this paper discusses the basic theory and the common method of the four graphic classification methods which can be used to determine the classification scheme of the single index feature statisti- cal data of thematic map.The four graphic classification methods are the classi- fication methods of scattered dots graph,histogram,clinographic curve and profile diagram.The author did a practical classification test with population density,and summarized the two advantages of the classification scheme on the basis of the graphic classification methods.It has regular class breaks and class intervals.