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International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XL-5/W2, 2013
XXIV International CIPA Symposium, 2 — 6 September 2013, Strasbourg, France
Figure 3. FARO Photon 120 3D laser scanner
2.3 Modeling of 3D Building Components and
Establishment of Corresponding Attribute Data
The relevant 3D point cloud models of the building before
restoration is reviewed in terms of point cloud model overlay
accuracy to ensure the model accuracy. Regarding the 3D point
cloud models that meet the accuracy requirements, according to
the classification and segmentation of building history scholars,
this study established the 3D digital models of the building and
relevant detailed components. Google SketchUp and its
modeling plug-in Pointools Plug were used because the tools
can simplify the 3D modeling process of the 3D point cloud
data, and considerably reduce file conversion time. Meanwhile,
it can keep high quality visual image and accuracy, and rapidly
increase the 3D modeling speed. In addition, the relevant
attribute data are recorded in XML format.
2.4 3D GIS Platform Planning and Design
This study did not use the commercial BIM commercial
software (AutoCAD Revit, Bentley Architecture, ArchCAD,
Graphisoft), but adopted the BIM construction concept. The 3D
building model data were directly input into the 3D GIS
platform to establish the convenient and low-cost HBIM
construction model. However, the 3D GIS system as the
platform of information relating to 3D building model should be
planned and designed according to the specific background and
maintenance management model. To comply with the
characteristics of “layered” storage and management of the
spatial information and attribute information of the 3D GIS
platform, the major components and detailed components of the
classified 3D building model after modeling as well as the
693
corresponding attribute data are input into the 3D GIS database
in a “layered” architecture. This can achieve the purposes of
saving storage space, fast accessing to data, overlay spatial
analysis and 3D visual demonstration.
3. RESEARCH RESULTS
This study applied 3D laser scanner in the digitalized operation
of the research target. Through “conjugate ball overall mode”,
the multi-station 3D point cloud data are combined into the 3D
point cloud model, and the relevant overlay accuracy meets the
requirements of the building scanning specifications.
Through the point cloud classification and segmentation process
of the 3D point cloud model, this study applied the 3D
modeling technology of the software of SketchUp in the
construction of the component 3D digital models of the research
subjects. The 3D spatial information model and relevant
attribute data of relevant components were input into the 3D
GIS platform process by the layered storage and editing method.
The BIM concept was applied to construct the 3D digital
building component models of the research target into a
database platform of HBIM. This study followed the traditional
building component classification principles upon the layered
storage and demonstration function provided by 3D GIS (Fig.
4). In the future, it can be applied in the construction and
updating of achievements of various stages or the spatial
overlay differential analysis of different image layers and
achievements of different stages.
oe ox pme
Figure 4. 3D GIS-based HBIM database platform
4. CONCLUSION AND SUGGESTIONS
This study proposed that the integration of BIM concept, 3D
GIS platform and 3D laser scanning technology can construct
the 3D spatial information and attribute data of the historical
buildings to be restored and repaired. It can be a multi-
functional platform of storage, editing, analysis and
demonstration. For historic buildings, the proposed method can
provide 3D conditions before, during and after restoration, and
help the digitalization of construction records as well as monitor
the construction quality. After the construction, the construction
process recorded in the platform can be used for the follow-up
management and maintenance of the historic building.
REFERENCES
Murphy M, McGovern E & Pavia, S 2011, 'Historic Building
Information Modeling - Adding Intelligence to Laser and Image