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高等级公路以及立交工程的空间线形正日趋多样化和复杂化。联机全站仪的出现给这类曲线的快速高精度测设提供了新的手段和方法。本文介绍了这种基于坐标的任意曲线（仅要求分段解析）的３Ｄ测设方法的基本原理以及主要算法，分析了这一方法的主要特点和适用条件，并介绍了其工程试验情况。
The spatial alignment of high-grade highways and interchanges is increasingly diversified and complicated. The emergence of on-line total station provides a new means and method for rapid and high-precision measurement of such curves. This paper introduces the basic principles and main algorithms of 3D coordinate measuring method based on arbitrary curve (only requires segment analysis), analyzes the main features and applicable conditions of this method, and introduces the engineering experiment.