坐标转换技术在管道开挖定位中的应用

摘要

根据检测和评价结果对管道进行维修维护工作是管道完整性管理中重要环节，而对埋地管道进行维修维护，缺陷点的开挖定位非常重要。GPS技术具有定位精度高等优点，其被应用于管道开挖定位中。维修维护人员根据开挖单给出的缺陷点坐标使用GPS现场放样完成开挖点的定位工作，但根据开挖单给出的缺陷点的三维相对坐标为平面坐标与GPS所采用的坐标系统不一致，不能直接使用，因此需要使用GIS工具进行坐标转换。本文详述了坐标转换技术的原理和过程，并结合在漠大线中的实践，论述了坐标转换技术在管道开挖定位中的作用。%Maintenance work according to the results of the inspection and evaluation of pipeline is an important part of pipeline integrity management,and excavation positioning of the defect point is very important to the repair and maintenance of buried pipeline.GPS technology has the advantages of a high positioning accuracy,which is applied in the pipeline excavation positioning.Using GPS the Maintenance personnel are able to complete the site positioning work easily,but the three--dimensional coordinates given by the dig sheets are plane coordinates which are inconsistent with the GPS coordinate system that it cannot be used directly,and therefore coordinate conversion using GIS tools is needed.This paper details the principles and process of coordinate transformation technique,combined with the practice in MODA Pipeline,discusses the importance of this technique in pipeline excavation positioning.