CAD点状符号与TrueType符号模型对比、转换与分析

陈泰生; 闾国年; 吴明光; 骆骐; 檀姗姗

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DOI: 10.11834/jig.20111117
2011 | Volume 16 | Number 11

CAD点状符号与TrueType符号模型对比、转换与分析

陈泰生^1,2, 闾国年¹, 吴明光¹, 骆骐¹, 檀姗姗¹(1.南京师范大学虚拟地理环境教育部重点实验室,南京 210046;2.滁州学院地理信息与旅游学院,滁州 239000)

摘要

从数据结构、存储方式两方面对比CAD点状符号与TrueType符号的符号模型,提出两者间的转换方法,设计出符号的双向映射机制。利用该方法进行符号转换实验,针对转换前后符号出现的数据量变化、变形以及信息丢失等问题进行了详细分析,实验结果表明,该方法能够实现CAD点状符号与TrueType符号之间的转换,有助于符号之间的共享。

关键词

CAD符号 TrueType 符号模型符号转换符号共享

Comparison conversion and analysis on models of CAD point symbol and TrueType symbol

Chen Taisheng^1,2, Lü Guonian¹, Wu Mingguang¹, Luo Qi¹, Tan Shanshan¹(1.Key Laboratory of Virtual Geographic Environment of Ministry of Education, Nanjing Normal University, Nanjing 210046 China;2.School of Geographic Information and Tourism, Chuzhou University, Chuzhou 239000 China)

Abstract

This paper aims at symbol sharing between CAD and TrueType. First, point symbol model between CAD and TrueType were compared from data structure and storage style. Second, conversion methods between them were proposed and some issues such as data size, information distortion and lost on fore-and-aft conversion were analyzed. Experiment validates the feasibility of conversion between CAD and TrueType point symbols and it help to symbol sharing.

Keywords

CAD symbol TrueType symbol model symbol conversion symbol sharing

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