基于克里金法的深圳似大地水准面插值研究

地面点的正常高可以通过GPS技术结合高精度、高分辨率的似大地水准面模型获得,以代替劳动强度大效率低的传统水准(或高程)测量.影响精度的因素有两个:GPS点大地高的测量精度和该点内插高程异常的精度.本文主要针对深圳市1km格网似大地水准面数据,利用克里金法内插拟合高程异常值,用实例说明克里金法在深圳市似大地水准面的应用中可以满足大比例尺数字化测图的需要.

Study of Shenzhen Regional Quasi-geoid Model Based on Kriging Interpolation Method

The normal height of the station can be obtained through GPS technology combined with high precision and high-resolution quasi-geoid refinement model.It can replace the conventional level measurements to reduce labor-intensive and improve efficiency.There are two factors that affect the accuracy: the accuracy of the geodetic height of the GPS station and its interpolation method.On the basis of the geoid of Shenzhen with one-kilometer resolution,the effect and accuracy of GPS height anomaly interpolation are analyzed and the results show that the Kriging interpolation method is accurate and stable for the high resolution quasi-geoid model.