Conversion of Buildings

Automatic conversion of IFC datasets to geometrically and semantically correct CityGML LOD3 buildings

Although the international standard CityGML has five levels of detail (LODs), the vast majority of available models are the coarse ones (up to LOD2, ie block-shaped buildings with roofs). LOD3 and LOD4 models, which contain architectural details such as balconies, windows and rooms, nearly exist because, unlike coarser LODs, their construction requires several datasets that must be acquired wit...

Moufang Buildings and Twin Buildings

The “Moufang Condition” for spherical buildings was introduced by J. Tits in the appendix of [9], as a tool to give more structure to the classification of spherical buildings of rank at least three (which are automatically “Moufang”). More recently, also the spherical buildings of rank 2 satisfying the Moufang Condition are classified [13]. Hence one could say that, on the geometric level, sph...

Solar Radiation and Orientation of Buildings: Case of Residential Buildings in Isfahan

Climatic conditions have a significant impact on the energy consumption of  buildings. Also check the angle of the solar radiation on buildings and controlling the amount of heat absorbed on building shell during the year have significant impact on building energy efficiency. The aim of this study was to investigate the effect of orientation of the building on the energy consumption and to this...

Axioms of Affine Buildings

We prove equivalence of certain axiom sets for a ne buildings. Along the lines a purely combinatorial proof of the existence of a spherical building at in nity is given. As a corollary we obtain that being an a ne building is independent of the metric structure of the space.

Grassmannians of Classical Buildings