基于GEE的苹果园地遥感信息提取研究OACSTPCD

Shaanxi Province is the best apple production region in the world with the largest contiguous ap-ple planting area.Accurate understanding of the spatial patterns and dynamic changes of apple orchards is of paramount importance for the advancement of strategic planning of the apple industry.Fourteen counties located in the Weibei Plateau of Shaanxi Province were taken as the research area.Based on the Google Earth Engine(GEE)cloud computing platform,leveraged Level-2 A data from Sentinel-2 remote sensing images in 2020 were used as data source.Combining with the 461 on-site sample points from apple or-chards,a comprehensive set of 21 classification features including spectral features,remote sensing vegeta-tion index,texture features,and topographic features were constructed.The random forest classification method was used to extract the spatial information of apple orchards in the Weibei Plateau.The results showed that the planting area of apple orchards was 200 300 hm2.Apple orchards with contiguous distribu-tion were mainly distributed in Luochuan of Yan'an,Baishui of Weinan,Chunhua of Xianyang,and Binzhou of Xianyang,with planting areas of 35 400,32 100,29 000 hm2 and 25 100 hm2,respectively.The scheme combining spectral features,remote sensing vegetation index,texture features,and topographic features performed the best among all these classification schemes with overall accuracy and the Kappa coefficient of 94％and 0.86,respectively.Our findings provide a scientific basis and data support for the rational plan-ning of the apple industry and the refined management of apple orchards in Shaanxi.