jgg     2012 32 (5):  48-52    ISSN: 0412-1961  CN: 21-1139/TG RESEARCH ON PROPERTIES OF TOTAL LEAST SQUARES ESTIMATION Wang Leyang 1,2) 1)Faculty of Geomatics, East China Institute of Technology, Nanchang 330013;2)Jiangxi Province Key Laboratory for Digital Land, Fuzhou 344000 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null