应用分区平差提高送电线路航测GPS平面控制精度

Inproving GPS Horizontal Control Precision in the Transmission Line by the Application of Subarea Adjustment

本文主要针对由于地方坐标系下对送电线路路径的严格界定,按照常规送电线路航测单航带拟合已知点的作业方法,将无法满足工作要求的情况,提出了应用分区平差的新方法,保证了外控点在实地投影变形最小且和地方坐标系建立了严密换算关系,满足了工程要求。

This article mainly aims at the reasons about strict limits for transmission line ways under the local coordinate system, according to the convention ways about using single flight strip to fit known point in power transmission aerophotogrammetry, will be unable to satisfy the work requirement, proposed the new method as applying block adjustment to do, has guaranteed the smallest distorts about the aerophotogrammetry outside controlled points and has established the strict conversion relations with the local coordinate system, satisfying the project request.