It put forward an effective new method to resolve the inverse position by using the conversionofcoordinates and projection in analytic geometry, the method was simulated and verified by MATLAB.
The data from the data sources of different countries are converted into the unifying data format and projection coordinates system by data conversion, projection conversion and error correction.
将来自不同国家的数据源进行数据转换、投影变换和误差校正，转换为统一的数据格式和投影坐标系统。
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Then the synoptical conversion parameter is calculated by control coordinates and photogrammetric coordinates of three control points.