等值线标注的一种算法探讨  

Discussing algorithm for label of isograms

作　　者：韩丽娜[1] 石昊苏[2] 

机构地区：[1]西北大学信息科学技术学院 [2]西北政法学院信息网络中心,陕西西安710063

出　　处：《计算机工程与设计》2006年第21期4084-4085,4167,共3页Computer Engineering and Design

摘　　要：等值线图在气象,地质测绘领域有着广泛的应用。目前,人们对于等值线的研究都集中在等值线的生成和填充上,而忽视了等值线的标注。而一个完整的等值线分析系统应该包括等值线的生成,填充,和标注。提出了一种等值线标注的算法,通过先找出等值线的近似多边形,然后根据系统要求在等值线上或近似多边形上输出标注。给等值线上添加标注,给标选择合适的位置,方向和疏密程度,将会使等值线图看起来更加直观、形象,使人们从图中就可获得更多的相关信息。Isograms are playing very wide roles in weather, geology topography fields. Now, people focus theirs attention to creating isograms and filling of isograms, but ignoring label of isograms. Moreover, a complete isograms analyzing system should include building, filling and label about isograms. An algorithm for label ofisograms is presented, firstly approximate polygon about isograms is found, then label on isograms or polygon according to system requirement is written out. Appending label on isograms, selecting appropriate position, direction and degree of sparseness will make isograms seemed more vividly and visually, and people are able to get more information from graph.

关 键 词：等值线 属性 标注 多边形近似法 流程图 标注方向 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]