Research on the Accuracy Analysis of 3D Models Based on Oblique Photogrammetric Technology
The development of digital city requires urban basic geographic information data to have the expression of three-dimensional model of real scene.This paper analyzes the advantages and disadvantages of various modeling methods,adopts the oblique photo-grammetric technology with low cost,high accuracy and high degree of automation to carry out the rapid production operation of the ur-ban realistic 3D models,conducts research on the influence of factors such as the number of control points,relative flight height,and POS data-assisted absolute orientation on the model accuracy,designs relevant experiments to verify the data.It concludes that a rea-sonable increase of the number of control points and reducing the relative flight height can effectively improve the accuracy of the 3D models,and the use of POS data to assist the image control points for absolute orientation can improve the accuracy of the high-rise buildings of the 3D model,and the 3D model is more detailed and realistic,which provides a more reliable technical solution for rapid production of a realistic 3D models of digital cities.
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