摘要
电子航海图是广义地图的一种,但是其符号体系独具一格。针对电子航海图现行符号标准S-52难以利用和扩展的问题,提出S-52点符号与SVG符号的自动转换方法。首先,建立S-52点符号与SVG符号两者坐标系的重构关系,实现坐标系的自动转换;然后,建立S-52点符号与SVG符号两者图元结构的重构关系,进行图元的自动转换。通过S-52点符号与SVG符号的重构和自动转换,最终构建完整的电子航海图SVG点符号。
The electronic navigational chart is a kind of map in general,but its symbol system is unique.Faced with the problem that the current symbol standard S-52 for electronic nautical chart is difficult to use and extend,an automatic conversion method for point symbol between S-52 and SVG is proposed in this paper.Firstly,reconstruction of the coordinate systems between S-52 and SVG is established to realize the automatic conversion of the coordinate systems.Secondly,reconstruction of the structure of point symbol between S-52 and SVG is established to realize the automatic conversion of graphics elements.Finally,a complete SVG point symbol of electronic navigational chart is constructed.
作者
陈长林
杨管妍
赵俊鹏
CHEN Changlin;YANG Guanyan;ZHAO Junpeng(State Key Laboratory of Resources and Environment Information System,Institute of GeographicSciences and Natural Resources,Chinese Academy of Sciences,Beijing 100101,China;Naval Institute of Hydrographic Surveying and Charting,Tianjin 300061,China;Dalian Naval Academy,Dalian 116000,China;Academy of Marine Science and Technology,Tianjin University,Tianjin 300072,China)
出处
《测绘科学技术学报》
北大核心
2019年第1期86-89,94,共5页
Journal of Geomatics Science and Technology
基金
中国博士后科学基金项目(2017M620884
2019T120127)
国防预研基金项目(3020107040301)
关键词
海图符号
符号转换
可伸缩矢量图形
电子海图
国际标准
chart symbol
symbol conversion
scalable vector graphic
electronic navigational chart
international standard
