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REVISTA IEEE 11

235 José Balsa Barreiro, Dieter Fritsch 3D Modelling of historic urban centres and… Image 7: (a-b) models obtained in certain areas of the historic city of Calw, such as (a-b) the Bads-trasse sector and (c) the sector defined by Calw Market Square and Lederstrasse. Source: a-b53, c54 http://revista.ieee.es RESULTS As a result of the previous step, a textured 3D model of each of the buildings in the study area is obtained. Specific examples are displayed in Figure 7 a-c. These individual models are grouped together and integrated into a virtual environment that represents the whole of the historic city of Calw. This is obtained with Unity software, providing a realistic and dynamic visualisation of the whole set (Figure 8). An optimal execution of the virtual model finally obtained requires a good resolution and low levels of computational weight. Evidence of this is that the weight of the file obtained for the whole area studied so far is below 25 MB.53, 54 53  LI, Jing (supervised by FRITSCH, Dieter and KHOSVARANI, Ali M. «High definition modeling of Calw, Badstrasse and its Google Earth’ integration», Master Thesis, Germany, Stuttgart University, 2014. 54  WANG, Yiwen (supervised by FRITSCH, Dieter and BALSA-BARREIRO, José). «Digital preservation of Calw Market Square-Lederstrasse (1) by means of automated HDS and photogrammetric texture mapping», Master Thesis, Germany, Stuttgart University, 2015.

REVISTA IEEE 11
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