地面沉降水准监测数据预处理流程与方法探讨

Discussion on the Pretreatment Process and Method of Ground Subsidence Leveling Monitoring Data

对地面沉降监测数据的处理,能够揭示区域地面沉降的分布特点和发展规律,但由于沉降量中不可避免的存在异常值,因此有必要进行数据预处理。本文依据有关规范定义了异常值,提出了剔除异常值和数据预处理的流程方法,并以数据剔除率作为评定指标,采用宁波市1999-2015年的地面沉降水准监测数据进行了处理和分析,结果表明本文提出的流程和方法能够有效剔除异常点位的沉降量,改进分析结果。

To process land subsidence monitoring datacan reveal the distribution characteristics and development regularity of regional land subsidence,because of the inevitable outliers existing in that processing,data pretreatment was needed.This article defined outliers in accordance with relevant specifications,and put forward the method of eliminating the outliers and the procedure of data pretreatment,and the data rejection rate was used as evaluation index to assess the effectiveness of the above methods.By applying the above methods to process the land subsidence monitoring data in 1999-2015 of Ningbo city,the results showed that the proposed method can effectively eliminate land subsidence data of the abnormal monitoring point,and achieved an improvement of analysis results.