We found that higher-order local surface(partial quartic surface)can give more accurate results if the DEM elevation data is very accurate.While if elevation data have a relative error,lower...

• 研究结果表明,当DEM数据精度比较高时,高次曲面(四次曲面)能给出较高精度的曲率计算结果,而当DEM误差较大时,低次曲面(二次曲面)由于具有误差的平滑作用而能产生较高精度的曲率值。