高性能互操作的OGC WMS系统的研究与实现

Research and implementation of high performance and interoperable OGC WMS

针对遥感数据量大、多时空分辨率等特点,提出了一种基于Tile影像金字塔存储结构的、符合OGC WMS规范的、高性能可扩展的网络地图服务实现方法,并实现了原型系统。该方法的主要思想是通过预处理技术将遥感图像切割成规则的Tile小块;然后将其存储在分布式存储系统中,地图服务器只返回用户请求地理区域的Tiles,这样减少了数据传输量。经过性能测试,与传统的方法相比,该方法提高了WMS系统的性能,缩短了系统的响应时间。

In accordance with remote sensing data’s characteristics, which had a large amount of data, much time and space resolution,this paper proposed a Web map server implementation.It based Tile image pyramid storage structure, conformed to OGC WMS standards and had high-performance scalable capacity. Besides, this paper implemented the prototype system. This approach was the core idea of remote sensing images which would be divided into small pictures, and to the distribute storage struct. According to the request of the client, the map server used the access rules for small picture, and then in a mosaic, to return to the client. Due to the distributed storage structure,this method had the advantage of saving transmission time in massive remote sensing data.