专题地图制图中双变量等值区域法的应用  

Application of bivariate choropleth method for thematic map

作　　者：董敬儒 焦继宗[1] 魏宝成[1] 段含明 颉耀文[1] DONG Jingru;JIAO Jizong;WEI Baocheng;DUAN Hanming;XIE Yaovuen(College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China)

机构地区：[1]兰州大学资源环境学院,兰州730000

出　　处：《测绘科学》2020年第9期141-147,共7页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41471163);国家自然科学基金重点项目(41530752);兰州大学祁连山研究院开放课题项目(504000-87080306)。

摘　　要：针对传统等值区域法难以在同一幅地图中描述多种专题地图要素,比较两个传统等值区域图增加了读者视觉记忆的负担的问题,该文以2009年美国县级肥胖率和糖尿病数据为例,采用了能够在一幅地图中清晰、有效、精确地描述两种地理现象的变化及分布,使专题地图更加简洁、易读的双变量等值区域图方法制作专题地图。结果表明:双变量等值区域专题图在表达复杂地图的差异性和相似性方面有显著的优势;同时能通过简单的视图提供更加准确的地图信息,是一种更加合理有效的专题地图可视化表达方法。Aiming at the problem that the traditional choropleth map was difficult to describe multiple thematic map features and comparing two traditional choropleth maps increased the burden of readers’visual memory,this paper used the bivariate choropleth method to make more concise and easy-to-read thematic maps that could clearly,effectively and accurately described the changes and distributions of two geographical phenomena,based on the 2009 US obesity rate and diabetes rate statistical data on county level.The results showed that the bivariate choropleth thematic maps had significant advantages in expressing the differences and similarities of complex maps.At the same time,it could provide more accurate map information through a simple view,which was a more reasonable and effective method for visualizing thematic maps.

关 键 词：双变量等值区域图 符号化地理数据 空间关系 专题地图 可视化 

分 类 号：P283[天文地球—地图制图学与地理信息工程]