符合S-52规范的电子海图系统设计与实现

Design and implementation for electronic chart symbol library compliant with S-52

电子海图显示与信息系统是一种以海图为基础的空间信息系统,海图符号库中的点、线和模式填充等符号是海图的基本语言,是海图的主要表达形式,因此海图符号库的设计在电子海图显示与信息系统中占有重要的地位.在概要介绍IHO表示库关于符号描述的基础上,设计并实现自有的基于TrueType的符合IHOS 52规范的符号库.该符号库极大地优化了海图符号库的数据组织结构,提高了符号的可移植性和设计效率,同时也提高了海图的显示速度和美观度.

ECDIS is a special system based on chart. The point, line and pattern symbol in the chart lib is the basic language and main expressive form for the chart. So, the design of the chart symbol lib plays a important role in ECDIS. This paper gives a general information of symbol in IHO presentation lib, then design and implements the self symbol lib based on TrueType accord to IHO. This symbol lib optimizes distinctly the data structure, improves the transpantability, accelerates and aesthetics the chart displaying.