On Plane Coordinate Transformation Based on Center of Gravity Datum

in the field of engineering measurement,to achieve a smooth transition between the old and the new coordinate system is to make full use of the key before the surveying and mapping results,is the basis for mapping various scale map.This paper takes the plane coordinate transformation as an example,introduces the plane right angle coordinate transformation model,and according to the analysis of morbid phenomena exist in the model of the actual production practice,plane coordinate transformation model proposes a benchmark,at the same time,by a comparative analysis of these two kinds of models,and put forward the method of correcting plane right angle coordinate transformation model,and through the the analysis of engineering example the conversion results and precision.