Research on Key Technologies and Applications of 1∶1 000 Scale DLG Aerophotogrammetric Updating Based on UAV
Using low-altitude UAV aerial photogrammetry technology as a mean of data acquisition,the production of large-scale topo-graphic maps by aerophotogrammetric method gradually becomes the trend of industry development.In this paper,we conduct a study on the updating method of UAV aerophotogrammetric large scale topographic maps:firstly,we elaborate the key technologies of aero-photogrammetric topographic map updating from four perspectives:sensors,cameras,image control points and aerial triangulation;then,we analyze the accuracy verification of the key links through the actual production project by using 1∶1 000 large scale topo-graphic map updating accuracy requirement as the standard.The results show that the 1∶1 000 large-scale topographic map updating accuracy requirements can be met by the method of aerial triangulation aided by high-accuracy POS on the basis of camera calibra-tion,supplemented by sparse ground image control points.The study can provide a reference for the production of large scale topo-graphic maps.
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