3D City Model with material properties in high resolution for urban simulations

The 3D city model contains 914 buildings that are comprised of small triangles for high-resolution urban simulations. It is given in OBJ format. The city model was generated from building outlines and aerial LiDAR data of the city of Celje, Slovenia (available at clss.si - Surveying and Mapping Authority of Slovenia). The materials of triangles were obtained from the TABULA building typology based on statistical characteristics.

The OBJ file contains data on triangles' geometry and their type (roof, window, wall or floor).  Each building is attributed with the corresponding materials, where every building exterior component's material properties are given in an MTL file. The predefined triangle and material properties' labels were used for compatibility with existing OBJ readers. Building related data is saved to files as follow:

OBJ file: The triangle type is saved as the first coordinate of a triangle's texture coordinate:- 0 - Roof- 1 - Wall- 2 - Window- Other - Floor

MTL file:Each building's material properties are written to a file as follows:- [Roof] Ka Solar_absorptance HT_coeff 0 - [Wall] Kd Solar_absorptance HT_coeff 0- [Window] Ks Solar_absorptance HT_coeff SHGC_coeff - [Floor] Ns HT_coeff