Bundle Block Adjustment Based on Imageries Given Orientation Parameters

According to self-calibrating bundle block adjustment, a mathematical model is set up at first, which solutes elements of exterior orientation of the new imageries by using imageries given orientation parameters in the same area. Then three sets of aerial imageries at different scales are taken respectively from the same area in 2002 and 2004. Finally the elements of exterior orientation of these new imageries and the 3D coordinates of photogrammetric points are calculated by combined bundle block adjustment with the derived mathematical model. The empirical results show that the elements of exterior orientation and the 3D coordinates of photogrammetric points are identical between the mentioned adjustment and the conventional bundle block adjustment for the two periods of imageries at the same scale. If the scales of the fixed imageries are bigger than the scales of new imageries, the solutions of the mentioned adjustment are better than that of the conventional bundle block adjustment. However, when the scales of the fixed imageries are smaller than the scales of new imageries, the adjustment accuracy has an apparent decrease and do not meet the specification of topographic mapping. The experiment has verified that determination of the orientation parameters of the new imageries by using the fixed imageries is correct in theory and is feasible in practice, and that the accuracy of the coordinates, which is gained purely by combined adjustment with two period of imageries, satisfies the requirement of the specification of topographic mapping. That is to say, aerial photogrammetry truly without any ground control point can be realized.