Figure 1. The separation between remote sensing reality-based modelling and civil engineering structural analysis dealing with
beam framed historic roof
1.2 Building Information ModellingManagement
The recently developed Building Information Modelling BIM technique is really accordant with above mentioned need Chi et
al., 2015 about the uniform platform for geometric and parametric modelling, information management and structural
analysis of the beam framed roof structure. BIM contributes to the creation of a digital representation having all physical and
functional building characteristics in several dimensions, as e.g. XYZ 3D, time and non-architectural information that is
necessary for construction and management of building and its elements. BIM technique can help to segment and parameterize
the entity-based virtualgeometry reconstruction to element- based model enriched with measurement, semantic, attribute,
relationship and dynamic information Yang et al. 2016. BIM also provides the base for further structural analysis and data
management. Therefore, the BIM environment combines the geometry modelling, element parameterization, dynamic
information management and structural analysis together, which avoids the transformation among diverse platforms and data
formats. Currently, BIM software typically Autodesk Revit has provided
a platform for manual semantic modelling on reference of reality- based data, such as measurement, total station points, imagery
and laser scanning. Once the elements have been parametrically created, they are simultaneously linked together with strict spatial
relationships. The spatial relationships are fixed, even if the sizes or shapes of the elements change. However, the manual elements
segmentation and parameterization process is time-consuming, especially when addressing complex structures.
Anyway, with recent developments in BIM technique, the well- known traditional geometry model is increasingly developing to
information model. The new model offers us uniform platform for the whole information representing the heritage and further
structural and material analysis Barazzetti et al. 2015; Murphy et al. 2013; Saygi and Remondino, 2013.
1.3 Revit API development
