Abstract: A three-dimensional modeling method for slopes based on Geographic Information System (GIS) and unmanned aerial photography technology is proposed in order to achieve high-precision restoration of surface texture and spatial undulations. The terrain and landform model is constructed using unmanned aerial photography and measurement techniques, and the stratigraphic model is established using GIS technology, thereby obtaining a high-precision three-dimensional model. In a certain section of a highway project, this method is applied to establish a slope three-dimensional model consisting of surface, stratigraphy, and underground mineral components. The results indicate that the slope three-dimensional model established using this method has the advantages of high accuracy and good visualization, and can accurately reflect the true conditions of the slope.

Key words: Geographic Information System (GIS), unmanned aerial photography technology, slope three-dimensional modelling

摘要： 为了实现高精度还原地表纹理和空间起伏的目的,提出基于地理信息系统(GIS)和无人机摄影技术的边坡三维建模方法,使用无人机摄影与测量技术构建地形地貌模型,通过GIS技术建立地层模型,从而得到高精度的三维模型。在某高速工程的部分标段中,应用该方法建立由地表、地层及地下矿体3部分组成的边坡三维模型。建立的边坡三维模型可视化好,能够准确地反映边坡的真实情况。

关键词: 地理信息系统(GIS), 无人机摄影技术, 边坡三维建模