jgg     2014 34 (2):  55-59    ISSN: 0412-1961  CN: 21-1139/TG PROPAGATION LAW OF ERRORS IN TOTAL LEAST  SQUARES ADJUSTMENT 1）Faculty of Geomatics, East China Institute of Technology, Nanchang 330013 2）Key Laboratory for Digital Land of Jiangxi Province, Fuzhou 344000 Received: 2013-06-26  Revised: null  Online: 2014-04-21 Supporting info