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《Transactions of the Chinese Society of Agricultural Engineering》 2010-10
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Monitoring of winter wheat area by remote sensing based on Cokriging

Fan Lei1,2,Cheng Yongzheng1,Zheng Guoqing1,Wang Laigang1,Liu Ting1(1.Agricultural Economy and Information Research Center,Henan Academy of Agricultural Sciences,Zhengzhou 450002,China;2.College of Information and Management Sciences,Henan Agricultural University,Zhengzhou 450002,China)  
149 wheat sampling frames were chose in winter wheat planting area,the influence factors which could reflect planting structure,the degree of field regulation and terrain were measured by Differential GPS.One of the three factors was determined as the main variable and the others as assistant variables by quantified.Two interpolation methods(ordinary Kriging and Cokriging) were applied in study area for interpolation,and the results were compared with each other in terms of their accuracy.It indicated that the root-mean-square error produced based on Cokriging decreased by1.48% compared with the ordinary Kriging under the same sampling numbers,and correlation coefficient between the predicted value and the measured value increased by 6.82%.Distribution of winter wheat planting area proportion made by Cokriging interpolation method,can correct regional large-scale remote sensing monitoring results.
【Fund】: 国家科技支撑计划课题(2006BAJ05A14)
【CateGory Index】: S512.11;S127
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