BUNDLE BLOCK ADJUSTMENT WITH HIGH RESOLUTION ULTRACAMD IMAGES

A high resolution photo flight with the UltraCamD has been made by the Bosporus Engineering Consultancy Services Inc (BIMTAS) over the city area of Istanbul for the generation of maps with the scale 1: 1000. The used 9cm ground sampling distance (GSD) can be compared with the information contents of a photo scale 1: 2700 taken by analogue cameras. The resolution satisfies any requirement for mapping in the scale 1: 1000. The narrow angle of the UltraCam is optimal in the city area with high buildings and narrow streets. The mapping requires an accuracy of 0.25mm in the mapping scale or 25cm, corresponding to 3 GSD. This is a low demand for the block adjustment. Nevertheless quite better accuracy is possible with the digital images. The optimal results only can be achieved with self calibration by additional parameters. The block adjustment is investigated in detail and the influence of the systematic image errors to the mapping is analysed