ANALYSIS OF CORRELATION OF COORDINATE TRANSFORMATION PARAMETERS
Du Lan 1) ;Zhang Hanwei 2) ;Zhou Qingyong 1) ; and Wang Ruopu 1)
1)Institute of Surveying and Mapping, Information Engineering University, Zhengzhou 4500522)School of Surveying & Land Information Engineering, Henan Polytechnic University,Jiaozuo 454000
Abstract Coordinate transformation parameters can be calculated from two sets of 3D points. Based on the characteristics of translation, rotation and zoom components of the transformation, the complete solution is divided into three steps. Firstly，positional vectors are regulated with respect to the centroid of sets of points in order to separate the translation component.Secondly,the scale coefficient and rotation matrix are derived from the regulated positions independently and correlations among transformation model parameters are analysed. It is indicated that this method is applicable to other sets of nonposition data to separate the respective attributions for transformation parameters.
