基于PB符号的图元类点状符号共享研究  

Sharing Point Symbols of Graphics Primitives Based on PB Symbols

作　　者：陈泰生[1] 陈梦琳[2] 王本林[1] 黄科佳 吴明光[2] 张弘弢[3] 

机构地区：[1]滁州学院地理信息与旅游学院,安徽滁州239000 [2]南京师范大学虚拟地理环境教育部重点实验室,江苏南京210046 [3]四川省基础地理信息中心,四川成都610041

出　　处：《地理与地理信息科学》2014年第5期7-11,共5页Geography and Geo-Information Science

基　　金：国家自然科学基金(41201485);教育部科学技术研究重点项目(212078);四川省测绘地理信息局科技计划项目(J2014ZC09);滁州学院科研启动基金(2012qd15)

摘　　要：针对不同平台间地图符号难以共享的问题,面向图元类点状符号,提出一种基于PB符号的共享方法。从符号语法角度分析了图元类点状符号与基于路径的点状符号结构,对比了两类符号模型差异,探讨了PB点状符号结构的完备性。利用PB点状符号模型,设计了图元类点状符号共享方法,从几何与样式两方面,提出了点类型、直线类型、弧段类型、光滑曲线类型以及组合类型图元的映射方式。进而以SuperMap点状符号库为实验对象,构建了图元类点状符号共享实验,验证了该文所提图元类点状符号共享方法的可行性,将会促进GIS平台间地图符号共享。Symbols between different platforms are difficult to share. In order to solve this problem,a method for point symbols of graphics primitives based on PB symbols is proposed. Firstly, structures between point symbols of graphics primitives and path-based point symbols are analyzed from grammar and then the versatility of path-based point symbol model is evaluated. Based on these experiences, mapping modes from graphics primitives such as point, line, arc, smooth curve and combination types to PB point symbols are presented. Furthermore,an experiment based on SuperMap point symbols is carried out with the goal of verifying the validity of sharing method for point symbols of graphics primitives. The method introduced in this paper will improve symbols sharing between GIS platforms.

关 键 词：地图符号 共享 符号结构 图元 地理信息可视化 

分 类 号：P208[天文地球—地图制图学与地理信息工程]