[1] Guangdong Acad Sci, Guangzhou Inst Geog, Guangdong Prov Key Lab Remote Sensing & Geog Info, Guangdong Open Lab Geospatial Informat Technol &, Guangzhou 510070, Peoples R China
[2] Ctr Nat Resources Policy Survey & Evaluat Jiangxi, Nanchang 330025, Jiangxi, Peoples R China
[3] Agroenvironm Monitoring Ctr Baoshan City, Baoshan 678000, Peoples R China
[4] Xiamen Univ Technol, Sch Comp & Informat Engn, Xiamen 361024, Peoples R China