公路航测选线方法的研究

Study of the Highway Reconnaissance by Means of Aerial Photograph

本文阐述利用航摄象片进行公路选线方法的研究。本课题包括:利用放大黑白象片和假彩色象片进行路线初选,利用光学立体模型进行路线布局,利用多倍仪、精密立体测图仪、正射影象装置和数字地面模型四种航测方法对同一路段进行路线中线测量,测制1:5000和1:2000线划地形图和1:2000影象地形图,以实测资料为基础,对比了上述四种航测方法的成果,探讨了四种航测方法的测量精度、适用条件和效益,从而得出适合我国目前条件的最佳勘测方法。

In this paper, the methods for the highway reconnaissance by means of aerial photograph have been studied. The following experiments were carried out. using an enlarging black-and-white photograph and an artificial colorphotograph for the preliminary reconnaissance, using a perspective spatial model for the reconnaissance survey of feasible routes, and using four photoplotting methods (multiplex-plotting, autograph stereo-plotting, orthophotomapping and digital terrain model) for the location survey in the same route. As a result, a photoplotting contour plot (1:5000 and 1:2000) and an orthophotoplan (1:2000) were drawn. The results obtained by the above four methods are compared with those from the field survey. The precision, the application conditions and the effectiveness of these methods are explored and an optimal reconnaissance method suitable for the existing conditions of our country is therefore proposed.