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基于Hadoop的區(qū)域土壤侵蝕強度計算GIS設計與實驗
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“十二五”國家科技支撐計劃項目(2012BAD16B00),、國家自然科學基金項目(41371189)和高分辨率對地觀測系統(tǒng)重大專項(08-Y30B07-9001-13/15)


GIS Design and Experiment of Soil Erosion Intensity Calculating Based on Hadoop
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    摘要:

    在開源分布式計算框架Hadoop的基礎上,,選擇大凌河流域為研究區(qū),構建降雨侵蝕力,、土壤可侵蝕性,、坡長等土壤侵蝕因子柵格數(shù)據(jù)分布式存儲策略,利用MapReduce編程模式設計實現(xiàn)通用水土流失方程RUSLE的算法程序進行土壤侵蝕強度計算,,并擴展Geoserver的柵格文件讀取功能,,增大對HDFS柵格文件的讀取支持,實現(xiàn)土壤侵蝕強度計算結果的快速發(fā)布,。結果表明,,該系統(tǒng)可實現(xiàn)大數(shù)據(jù)量,、高分辨率土壤侵蝕因子柵格數(shù)據(jù)的區(qū)域土壤侵蝕強度快速計算,可較好滿足區(qū)域土壤侵蝕預測預報的時效性要求,;程序運行過程中計算任務本地化效果明顯,,顯著降低了計算過程中的網絡傳輸壓力,網絡使用率約22%,,且系統(tǒng)性能可通過增加計算節(jié)點進一步提升,。本研究可為大數(shù)據(jù)量、高分辨率柵格數(shù)據(jù)下區(qū)域土壤侵蝕強度計算及發(fā)布GIS設計開發(fā)提供指導,,為大凌河流域土壤侵蝕監(jiān)測提供科學依據(jù)。

    Abstract:

    At present, the research trends and hotspots of regional soil erosion are related to efficiently accessing a large amount of soil erosion factors raster data, quickly calculating and publishing the date of soil erosion intensity. To solve these problem, a GIS was constructed, which consisted of the distributed storage of soil erosion factor raster data, the parallel computing program to calculate soil erosion intensity and the quickly publishing program of soil erosion intensity, based on the latest open source project called Hadoop. Then an experiment of calculating the DaLing River Basin’s soil erosion intensity was taken through the system. The result showed that initially the system can much effectively calculate DaLing River Basin’s soil erosion intensity from a large amount of soil erosion factors raster data. Furthermore, the system can fulfill the requirement of regional soil erosion intensity prediction and forecast. Additionally, in the process of running the program, the localization effect of the calculation task was very obvious, the network transmission pressure in the calculation process was significantly reduced, the network usage rate was maintained at about 22%, and the system performance can be further improved by adding computing nodes. Finally, the studies can provide guidance for GIS design and development of regional soil erosion intensity calculating and publishing with a large amount of highresolution raster data, and provide scientific basis for soil erosion monitoring in DaLing River Basin.

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雷 章,岳德鵬,YANG Di,羅志東,許永利,于 強.基于Hadoop的區(qū)域土壤侵蝕強度計算GIS設計與實驗[J].農業(yè)機械學報,2018,49(9):160-165,137. LEI Zhang, YUE Depeng, YANG Di, LUO Zhidong, XU Yongli, YU Qiang. GIS Design and Experiment of Soil Erosion Intensity Calculating Based on Hadoop[J]. Transactions of the Chinese Society for Agricultural Machinery,2018,49(9):160-165,137.

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  • 收稿日期:2018-03-29
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  • 在線發(fā)布日期: 2018-09-10
  • 出版日期: 2018-09-10
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