<正>针对城市地下管线空间分布的复杂性和隐蔽性,提出了城市地下综合管线断面分析的数据结构和断面交点计算方法,研究基于向导的截面可视化生成技术,包括管线的横断面、纵断面分析以及横断面的三维空间距离量测与纵断面的水平距离量测等功能,并结合具体工程项目作了实例应用。

In this paper,the authors put forward a kind of data structure of section analysis for urban underground pipes,and designed a type of arithmetic for getting points of intersection of the section.The authors put forth the section visualization technology and given an example to application.For a transect analysis,geographical coordinate value of X multiplied by cos θ is X-axis.Y-axis is Z-axis of geographical coordinate.For a vertical section analysis,X-axis is X-axis of geographical coordinate,and Y-axis is Z-axis of geographical coordinate.3D distance or horizontal distance can get from a sectional view.Moreover it is important that a sectional view is clear to visualize kinds of underground pipes.