This paper presents the results of experimental and survey work on the application of Unmanned Aircraft System (UAS) photogrammetry to determine the geometric parameters that describe crane ground rails. The goal was to achieve highly accurate measurements (millimeter accuracy) to determine the geometric parameters of elongated engineering objects (of significant dimensions, such as a crane track) up to several hundred meters long and several dozen meters wide. The method of processing images taken with the use of UAS depends on combining images taken at different flying heights and the use of code targets (of appropriately selected sizes), enabling the automatic measurement of controlled points representing the object. The method of fixing the plates with the code target on the crane track is described.

Experimental field work was conducted using a section of crane track of length 35 m whose span was 6.000 m. The proposed method features high accuracy, takes less time and is therefore less expensive than other known methods.

本文介绍了应用无人机系统摄影测量法确定描述起重机地面导轨的几何参数的实验和调查工作的结果。目标是获得高度精确的测量结果（毫米精度），以确定长至几百米，宽几十米的细长工程对象（尺寸较大，例如起重机轨道）的几何参数。The method of processing images taken with the use of UAS depends on combining images taken at different flying heights and the use of code targets (of appropriately selected sizes), enabling the automatic measurement of controlled points representing the object. 描述了将带有代码目标的板固定在起重机轨道上的方法。

使用一段长度为35 m，跨度为6.000 m的起重机轨道进行了现场实验。所提出的方法具有精度高，花费时间少并且因此比其他已知方法便宜的特征。