城市地面沉降监测数据的插值方法对比分析

Comparison and Analysis of the Spatial Interpolation Methods of the Urban Ground Subsidence Monitoring Data

以长江三角洲地区某城市为实验区,利用该区2016-2017年地面沉降监测数据,分别采用4种常见的空间插值方法对离散的监测点沉降量进行插值计算,获得地面连续变化的沉降信息。对插值结果采用交叉验证法对比分析,表明反距离权重法插值效果最好。据此对监测区沉降情况分析显示,城区地面较为稳定,农村地区仍存在沉降现象。

Taking a city in the Yangtze River Delta as an experimental area,based on the ground subsidence monitoring data of experimental area from 2016 to 2017,we used four common spatial interpolation methods to interpolate the settlement of discrete monitoring points to obtain continuously changing ground subsidence information.Then,we used the cross-validation method to compare the interpolation results.The result showed that the anti-distance weight method had the best interpolation effect.According to the settlement analysis of the monitoring area,the urban ground was relatively stable and there was still settlement in rural areas.