GML与GeoJSON格式的编码解码与传输差异比较研究  

The Comparative Study between GML and GeoJSON in Coding,Decoding and Transmission

作　　者：李彤 LI Tong(College of Geomatics and Geoinformation,Guilin University of Technology,Guilin Guangxi 541000,China)

机构地区：[1]桂林理工大学测绘地理信息学院,广西桂林541000

出　　处：《北京测绘》2018年第3期281-285,共5页Beijing Surveying and Mapping

摘　　要：GML和GeoJSON是地理信息数据共享与集成中的两种数据交换格式。基于GML的数据交换是当下最常用的交换方式,但其存在编码和解码时间过长的问题,而GeoJSON是一种新兴的更加简洁的数据格式。针对这两种数据格式,本文理论分析了GML和GeoJSON的要素编码差异和传输开销差异;并以中国地区的ShapeFile数据为例,设计实验对比GML和GeoJSON编码时间、编码后相应文件大小、解码时间的差异。实验结果表明:相比GML格式,GeoJSON格式更为简便、传输开销较小、编码和解码性能更高,为地理信息的共享和集成提供了一种快捷途径。GML and GeoJSON are two data interchange formats in geographic information sharing and integrating.GML based data exchange is the most commonly used mode of exchange in the present time with the problem of long encoding and decoding time,while GeoJSON is a new and more concise data format.In view of these two data formats,this paper analyzes the differences between the elements coding and transmission costs of GML and GeoJSON.Based on the data of ShapeFile in China,the designed experiment compares the differences between GML and GeoJSON encoding time,file size and decoding time.The experimental results show that compared with GML format,GeoJSON format is more convenient,less transmission overhead,better encoding and decoding performance,which provides a shortcut for the sharing and integration of geographic information.

关 键 词：地理标记语言 GeoJSON格式 编码解码 传输开销 比较研究 

分 类 号：P208[天文地球—地图制图学与地理信息工程]