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Analysis of Georeferencing Accuracy in 3D Building Modeling Using CAD Plans  

Kim, Ji-Seon (세종대학교 지구정보공학과)
Yom, Jae-Hong (세종대학교 지구정보공학과)
Lee, Dong-Cheon (세종대학교 지구정보공학과)
Publication Information
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography / v.25, no.2, 2007 , pp. 117-131 More about this Journal
Abstract
Representation of building internal space is an active research area as the need for more geometrically accurate and visually realistic increases. 3 dimensional representation is common ground of research for disciplines such as computer graphics, architectural design and engineering and Geographic Information System (GIS). In many cases CAD plans are the starting point of reconstruction of 3D building models. The main objectives of building reconstruction in GIS applications are visualization and spatial analysis. Hence, CAD plans need to be preprocessed and edited to adapt to the data models of GIS SW and then georeferenced to enable spatial analysis. This study automated the preprocessing of CAD data using AutoCAD VBA (Visual Basic Application), and the processed data was topologically restructured for further analysis in GIS environment. Accuracy of georeferencing CAD data was also examined by comparing the results of coordinate transformation by using digital maps and GPS measurements as the sources of ground control points. The reconstructed buildings were then applied to visualization and network modeling.
Keywords
CAD Plan; Topology; Georeferencing; 3D Visualization; Network Model;
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