Using High-Performance Computing to Address the Challenge of Land Use/Land Cover Change Analysis on Spatial Big Data

Using High-Performance Computing to Address the Challenge of Land Use/Land Cover Change Analysis on Spatial Big Data
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利用高性能计算应对空间大数据土地利用/土地覆盖变化分析的挑战

DOI:
10.3390/ijgi7070273
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发表时间:
2018-07
影响因子:
3.4
通讯作者:
徐胜华
徐胜华
中科院分区:
地球科学3区
文献类型:
--
作者:
亢晓琛;刘纪平;董春;徐胜华

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土地利用/土地覆盖变化(LUCC)分析是区域和全球的一个基本问题。能够准确反映景观多样性并发现差异或变化的地理学。在地球表面。然而,非常沉重的计算负载通常是不可避免的,特别是。在处理多时相土地覆盖数据时,采用较复杂的精细空间分辨率。本文采用基于图的空间分解来表示计算负荷。作为图的顶点和边,然后使用平衡图划分来分解LUCC。空间大数据分析。针对分解任务,提出了一种流调度方法。利用数据移动、裁剪、叠加分析、面积计算和过渡等方面的并行性。矩阵的构建。最后,对2015 - 2016年的土地覆盖数据进行了变化分析。在一个有15个工作站的集群中,耗时不到6小时,这是一项不可缺少的任务。超过两周没有任何优化。
Land use/land cover change (LUCC) analysis is a fundamental issue in regional and global.geography that can accurately reflect the diversity of landscapes and detect the differences or changes.on the earth’s surface. However, a very heavy computational load is often unavoidable, especially.when processing multi-temporal land cover data with fine spatial resolution using more complicated.procedures, which often takes a long time when performing the LUCC analysis over large areas..This paper employs a graph-based spatial decomposition that represents the computational loads.as graph vertices and edges and then uses a balanced graph partitioning to decompose the LUCC.analysis on spatial big data. For the decomposing tasks, a stream scheduling method is developed.to exploit the parallelism in data moving, clipping, overlay analysis, area calculation and transition.matrix building. Finally, a change analysis is performed on the land cover data from 2015 to 2016 in.China, with each piece of temporal data containing approximately 260 million complex polygons..It took less than 6 h in a cluster with 15 workstations, which was an indispensable task that may.surpass two weeks without any optimization.
DOI: 10.1016/j.compenvurbsys.2010.04.001
发表时间: 2010-07
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期刊: [1991] Proceedings 32nd Annual Symposium of Foundations of Computer Science
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