DEM网格间距对重力远区地改精度的影响及效果

李忠平, 戴广凯, 张茂辉

The impact and effect of DEM grid spacing on the accuracy of gravity remote topographic correction

LI Zhong-Ping, DAI Guang-Kai, ZHANG Mao-Hui

表1 改进的双线性插值法试验计算对比

Table 1 Comparison table of test calculation of improved bilinear interpolation method

节点 x坐标/m y坐标/m g(xi,yi)=-11.15 302130 4136486 g(xi,yi+1)=-11.58 302130 4137983 g(xi+1,yi)=-8.03 305036 4136486 g(xi+1,yi+1)=-9.03 305036 4137983 双线性插值法地改后布格重力异常值 -9.55×10-5m·s-2 改进的双线性插值法地改后布格重力异常值 -10.69×10-5m·s-2