城区铅垂线辅助空中三角测量研究

根据灭点理论建立了铅垂线辅助空中三角测量理论模型，讨论了控制点的分布和旁向重叠度对附加铅垂线约束的空中三角测量的精度与可靠性的影响，最后结合实际数据对上述铅垂线辅助空中三角测量理论分析结果进行了试验验证。试验结果表明，铅垂线约束可以作为一种控制条件，引入城区航空影像的空中三角测量，以减少传统空三所需的高程控制点数，为城区航空影像的空中三角测量解算提供了一种新的思路。

Study of the Vertical Lines Supported Aerial Triangulation over Urban Areas

In this paper, the mathematical model of the vertical lines supported aerial triangulation has been established according to the theory of the vanishing point. Two relative problems, which are the layout of the ground control points and the side-overlap, have been studied in order to reveal the accuracy and the realiability of the vertical lines supported bundle block adjustment. The study and the test results show that the vertical lines could be introduced into the traditional bundle adjustment as additional height control conditions and could reduce the necessary height control points number siginificantly, thus the work presented in this paper provides a new way for the calculation of the aerial triangulation of the aerial imagery over urban areas.