基于高层级地图瓦片的低层级瓦片并行合成技术  

Low-level Tile Parallel Synthesis Technology Based on High-level Map Tiles

作　　者：刘世永[1] 吴秋云[1] 陈荦[1] 李军[1] 景宁[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院,湖南长沙410073

出　　处：《地理信息世界》2015年第6期51-55,共5页Geomatics World

基　　金：国家863计划项目(2015AA123901);国家863计划项目(2012AA12A405)资助

摘　　要：瓦片金字塔具有多个层级,以传统方法来说,创建瓦片金字塔需先对影像创建金字塔,而后读取各层级金字塔数据进行切片。随着单幅遥感影像的数据量越来越大,其影像金字塔的数据量也相应越来越大,传统方法构建瓦片金字塔在面对大幅大数据量遥感影像时其效率远远达不到应用需求。针对这种问题,本文提出一种名为para Tile M的并行算法,该算法可以利用高层瓦片来快速合成低层瓦片,实验结果表明:本文算法极大地提高了瓦片金字塔的构建效率,为Web GIS的数据快速发布提供了有力的支持。Pyramid tile having a plurality of levels, for the traditional method, the creation of an image tile pyramid should create an image pyramid firstly, then read the data at all levels of the pyramid slice. With the volume of remote sensing image data is growing, and correspondingly the image data pyramid is growing. The traditional way to build up pyramids of large amount of remote sensing data is far less than its application requirements. This paper presents a parallel algorithm called para Tile M, which can be used to synthesize the lower level tile, and experimental results show that the proposed algorithm greatly improves the efficiency of the construction of the pyramid tiles for Web GIS data.

关 键 词：遥感 瓦片金字塔 MPI 并行 

分 类 号：P208[天文地球—地图制图学与地理信息工程] TP311[天文地球—测绘科学与技术]