Limiting Error Propagation In Network Design

Ana:ysis of the covariance matrix of object point coordinates forms an integral part of photogrammetric network optlmlZatIOn, especially at the zeroand fIrst-order deSign stages. Yet, computation of full covariance matrices can Impose a consIderable tIme burden in interactive network design systems which are implemented on microcomputers. In this paper an examInatIOn IS made of the applicability of the so-called limiting error propagation to see just how representatIve of the true covanance structure the covanance matrix from limiting error propagation really is. The method, If found to yIeld satIsfactory vanance estimates, offers the potential of immediately solving the zero-order deSIgn problem whIle proVIdIng a SImpler approach to covariance matrix computation in network design.