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Abstract

In an era of constant development of digital technology as well as growing urbanisation, larger and larger demand for three-dimensional spatial information can be observed. Photogrammetric measurement technologies meet expectations of the users. Data from aerial photographs and airborne laser scanning let us obtain information even on huge areas in no time, on the basis of which one may produce 3D models of reality. Technologies, such as terrestrial laser scanning or digital terrestrial photography, enrich aerial measurements with morę accurate spatial data. Moreover, such technologies may be an autonomous subject of research.

The aim of this thesis is to produce and compare two LoD3 spatial models of the Mechanics Building of the Warsaw University of Technology and to assess their precision. The first model was produced on the basis of the laser scanning data, while the second one on the basis of the digital photographs.

The theoretical part presents the usefulness of the data collected by way of photogrammetric methods of creating spatial building models. Moreover, it deals with different approaches to the production of 3D models using Computer equipment. Finally, the theoretical part describes the standards of recording, presentation and exchange of data conceming 3D models and explores the characteristics of LoD.

The practical part describes the whole process of production of realistic 3D models, starting with data acquisition, through data processing and ending with using of the data in the modelling process. Moreover, the practical part provides a short description of the programs used at all stages of the research and discusses their functionality as regards the production of LoD3 models. A special focus was put on differences and similarities between using different source data in the process of model production.

The end result of the thesis are two 3D models of the Mechanics Building of the Warsaw University of Technology. The assessment of accuracy of the products received showed that such models have higher accuracy than the one resulting from LOD3 standards.

Keywords:    3D modelling, NURBS, LoD, laser scanning, digital photographs