数字地形分析并行计算技术研究  

Research on Parallel Technology for Digital Terrain Analysis

作　　者：汤国安[1] 江岭[2] 刘凯[1] 

机构地区：[1]南京师范大学地理科学学院,江苏南京210023 [2]滁州学院地理信息与旅游学院,安徽滁州239000

出　　处：《地理信息世界》2015年第6期7-15,共9页Geomatics World

基　　金：江苏省高校自然科学研究项目(13KJA170001);安徽省高校自然科学研究项目(KJ2015A171)资助

摘　　要：地随着对地观测技术的快速发展,数字高程模型(DEM)数据量呈现数量级增长,且DEM应用领域中流域模拟、减灾应急、区域生态等大型地学问题的不断涌现,传统的数字地形分析(DTA)串行计算模式已不能充分利用和发挥当前新型硬件构架(单机多核、多机多核、集群等)计算机资源的能力,更是难以满足实际应用的区域规模与计算时效需求。本文在数字地形分析并行计算研究现状的基础上,从数字地形分析粒度模型、数字地形分析数据与任务调度方法、数字地形分析并行可视化及数字地形分析算法并行策略等方面研究了数字地形分析并行计算关键理论与技术,进而研发了面向新型硬件构架的新一代GIS的数字地形分析并行算法库和中间件,并已集成到国产高性能GIS平台——Hi GIS中,对推动我国GIS的跨越式发展具有重要作用。With the rapid development of earth observation technology, data volume of digital elevation model（DEM） data volume has got an order of magnitude bigger. In addition, plenty of practical large projects in the fields of basin simulation, disaster emergency and regional ecology are conducted. For these reasons, traditional digital terrain analysis（DTA） serial computation mode can not take full advantage of abilities of latest hardware architecture（single-computer multi-cores, multi-computers multi-cores, cluster, etc.）, but also difficult to meet the demand of large scale and fast computation in practical use. This paper summarizes current researches on DTA parallel computing, and studies key theories and technologies in aspects of granularity of digital terrain analysis model, digital terrain analysis data and task scheduling method, parallel visualization of DTA and parallel strategy; finally develops a new DTA parallel algorithms library and middleware, which has been integrated into Hi GIS, the domestic high performance of GIS platform. This would play an important role in promoting the leap-forward development of GIS.

关 键 词：数字地形分析 数字高程模型 并行计算 高性能 HiGIS 

分 类 号：P208[天文地球—地图制图学与地理信息工程] TP301.6[天文地球—测绘科学与技术]