Abstract: The conventional method of demolition surveying and mapping measures sides of houses and their appurtenance by outdoor household surveys and then calculates house area within indoor work. However, it is difficult to speed up and increase efficiency without increasing costs to meet the constantly accelerating urban renewal. As an emerging technology in recent years in the international surveying and mapping field, unmanned aerial vehicle (UAV) oblique photogrammetric technique can generate live 3D model automatically, produce large-scale topographic map and collect the sizes and structural elements of ground object based on the model, thus simplifying field work. This article puts forward a new surveying and mapping pattern for old villages demolition based on oblique photogrammetric technique, and tests the validity of this pattern in Beishan village demolition project. The experimental results show that the precision of topographic map, sizes of ground object and area all fit for corresponding criteriaj, and the production efficiency has been improved significantly.

Key words: oblique photogrammetric technique, demolition surveying and mapping, large-scale topographic map, efficiency, live 3D model