Data Extraction From The Construction Drawing For3D Building Modeling

The construction of three-dimensional city is developing worldwide. As the main constituent element of city, buildings are also the emphasis of the construction of three-dimensional city. The present work of3D building modeling only concentrates on the surface modeling, which makes these models just meet the needs of visualization. With the development of3D city, it proposes further requirements to3D building modeling, that must be applied to Indoor Navigation, Disaster&Emergency Management, Urban Planning, Architectural Design and so on. The integrative model of indoor and outdoor of3D building has been urgently needed. The data semantic, position and geometric information which the architectural working drawing describes, has provided the indispensable information and convenient method for3D building modeling, which lays a foundation for this paper.With the goal of structuring3D building integrative modeling of indoor and outdoor, this thesis has researched building3D modeling data extraction method based on architectural working drawing. Main Research Contents and achievement as follows:Based on the research of the hierarchical relationship of building components, this dissertation has built the classification system of building components, designed the semantic model of building components grade, which provide the theoretical basis for data Extraction.Next, this dissertation analyzed the contents of architectural working drawing and the figure characteristics of building components to summarize the difficult points of object recognition and data extraction. Aiming at solving the difficult points, it came up with the appropriate data extraction method which combined with TArch, after contrasted the architectural software interface.Based on the degree of opening of the TArch about the components information, it classified the building components, and determined different data extraction method for different class. About the components that offered the group code, it research the method to extract the whole value from the software, and about the components that not be offered the group code, it design appropriate algorithm to obtain corresponding information. Finally, it used the real architectural working drawing data to check the veracity and feasibility of these data extraction methods.