Определение видимости в плане лесовозной автомобильной дороги методом наземной стереофотограмметрии

Abstract

The article describes a method for determining the visibility on the roundings of logging roads based on the materials of ground-based photo and video recording. The essence of this method is to compare the spatial photogrammetric coordinates of the points of the visibility zone. The obstacle zone and the visibility zone are considered in the same photogrammetric coordinate system, and the design center of this system coincides with the left end of the photovideo recording basis. Studies are given to determine the magnitude of the visibility distance on the horizontal curves of logging roads in the presence of an obstacle in relation to the normal case of shooting. Measures to improve traffic conditions on the roundings of logging roads in the event of a complete or partial lack of visibility are also considered. In the course of the research, dependences were obtained to determine the value of the visibility distance by the method of ground-based stereophotogrammetry, in relation to horizontal curves in the road plan; the assessment of the accuracy of determining the distance of visibility based on the materials of ground-based stereophotogrammetry was carried out. In the case of lack of visibility on the horizontal curves of roads, dependencies are proposed to determine the area and volume of the cut, and dependencies are established to assess the accuracy of the measurements performed.