The purpose of this report is to investigate the accuracy of determining three dimensional air movements in ventilated rooms by means of the photogrammetrical methods. Two approaches to determine the accuracy have been used. The first one is based on analytical calculation which analysis the relations between the image coordinates and the object coordinates. The second method is based on simulation by introducing random errors to the image coordinates and calculation of the object points. A relatively close agreement between the errors obtained analytically and by simulation has been achieved for the typical object of size 3x3x0.3 m. Some other aspects like optimisation o f the network, a selection of a suitable mathematical model of the process are discussed in this paper. Finally recommendations for further research and development are presented.
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