关键词: 车载导航, 平面转换模型, 坐标转换, 定位精度

Abstract:

Errors exist in the vehicle navigation system under the positioning of the point conversion to the actual electronic map in the process. In order to improve the vehicle navigation system positioning precision by ameliorating the coordinate transformation model, on the basis of classical plane transformation algorithms, we first use the gauss projection of the GPS receiving (B, L) coordinates into plane coordinates (X, Y), Then, According to the least squares method, we obtain the transformation parameter. At the same time, the error of the common point itself serves as a random processing parameters. According to the method of least square configuration model, we transform parameters as nonrandom parameters. In order to obtain a stable parameter estimation, we avoid the common point error caused by of the uneven distribution. Experimental results show that the algorithm has a higher real-time property and stability.

Key words: vehicle navigation, plane switching model, coordinate transformation, positioning accuracy