基于仿射变换的线状符号绘制算法研究  

Study of linear symbol drawing algorithm based on affine transformation

作　　者：王继周[1] 赵占杰[1] 孙伟[1] 

机构地区：[1]中国测绘科学研究院,北京100830

出　　处：《测绘科学》2015年第7期92-97,共6页Science of Surveying and Mapping

摘　　要：针对目前线状符号绘制方法在转折处无法很好地保证复杂图元的几何关系,从而影响显示效果的问题,该文提出一种基于仿射变换的线状符号绘制算法,解决了在保证任意复杂符号的几何拓扑关系不变情况下转折处的平滑过渡难题,实现了线状符号的高效、美观绘制。最后经实际应用验证,该方法能够满足地理信息系统符号化显示和计算机制图需求。Aiming at the problem that it is difficult to keep the correct geometric relationship between complex graphic primitives at the turnings using existing linear symbol drawing algorithm, which impacts the map display effect, the paper presented a drawing method of linear symbol based on affine transformation, in order to solve the symbol smooth transition problem at line corners, and realize the efficient mapping of linear symbols. Finally, practical application result showed that the algorithm could meet the requirement on the symbolic display of GIS and cartography with computers.

关 键 词：线状符号 仿射变换 几何关系 拓扑 

分 类 号：P283[天文地球—地图制图学与地理信息工程]