基于改进中线法的电子海图岛屿面状注记自动配置研究  

The Automatic Configuration Research of the ECDIS Area Annotation that Based on the Improved Midline

作　　者：王腾飞[1] 祝若鑫 周伟强[1] 任宏康 

机构地区：[1]信息工程大学,河南郑州450001

出　　处：《测绘与空间地理信息》2016年第10期59-61,66,共4页Geomatics & Spatial Information Technology

基　　金：国家自然科学基金项目(41271392;41401462);郑州市科技攻关项目(112PPTGY225)资助

摘　　要：在电子海图岛屿动态注记中,需要在比例尺变化时,同时考虑注记配置的准确度和运算的效率。现有的面状注记配置算法,不适用于同一水平或垂直线上有多个顶点的情况,且其较多地适用于静态注记配置。本文基于中线法进行改进,通过先求取单个注记字体的水平位置,再反向求取垂直位置来确定注记字体的大小。最后通过字体调整来实现注记的动态配置。实验表明,该算法有效地提高了电子海图岛屿动态注记自动配置的准确度和运算效率。It＇ s needed to take care of accuracy and computational efficiency of the note configuration while scale changing in the elec- tronic chart island dynamic note. The existing Surface Note Configuration Algorithms can＇ t be used in a same horizontal or vertical line with a plurality of vertices and it＇ s more applicable to static note configuration. In this paper, it was improved based on Midline Meth- od. Firstly the level position of a single note font was calculated and then the vertical position was calculated in reverse to determine the size of the note font. At last, the dynamic configuration of note was realized by adjusting the font. Experiments showed that the al- gorithm can effectively improve the accuracy and computational efficiency of the automatic configuration in the electronic chart island dynamic note.

关 键 词：改进中线法 电子海图 面状注记 

分 类 号：P285.3[天文地球—地图制图学与地理信息工程]