A mixed methodology for detailed 3D modeling of architectural heritage

Three dimensional modeling has become an important tool for applications including record keeping, virtual reality and structural analysis of architectural heritage. Laser scanning and photogrammetry are the two most-used techniques. Whereas the former provides a fast and accurate model, the required equipment is bulky and difficult to position. Therefore, it cannot provide a complete model of the monument. The latter technique uses a digital camerawhich can be used manually, located on a drone or on top of supporting structures. Hence, this versatile technique can generate complete 3D models at the expense of larger processing times. This work proposes a mixed approach for digitization of architectural heritage combining the data from laser scanning and photogrammetry. This approach is applied in three churches of the Andean-Baroque Route. The results show high-detailed 3D digital models which subsequently can be used for generating architectural drawings, 3D solid models, walk-through videos and animations.