数字高程模型坐标系统转换方法及精度分析

The Method and Accuracy Analysis of DEM Coordinate System Conversion

利用两幅1954年北京坐标系为基准的1∶50 000线划图的高程注记点和等值线采样点计算了2000国家大地坐标系的数字高程模型,比较了不同内插算法计算的数字高程模型的精度。结果表明,"克里金"内插算法较好,经转换和内插可以实现数字高程模型的坐标系统转换。

This paper calculates the 2000 national geodetic coordinates DEM using the elevation lettering point and isoline sample point of the two 1954 Beijing coordinate system based 1：50 000 line graph, compares the accuarcy of DEM generated from different in- terpolation algorithm. It is proved that Kriging interpolation algorithm is better and the coordinate system of DEM can be conversed through conversion and interpolation method.