โ Scribed by ke Johnsson
No coin nor oath required. For personal study only.
The discussion of vertical versus convergent photographs in aerophotogrammetry has up to now mainly been founded upon practical points of view. In this investigation an attempt is made to treat the accuracy problem of convergent photogrammetry in a more theoretical manner. It concerns the propagation of the errors that arise at the stereo-plotting of a model of convergent photographs .when one assumes correct pictures and correct reconstruction of the inner orientation. The errors of the final coordinates are expressed as functions of the errors of the fundamental model operations. Assuming these errors to be of mainly accidental (normally distributed) character the final accuracy can be expressed with the aid of well-known error propagation laws. It is found that the accuracy of the final elevations is greater in the convergent than in the vertical case. In planimetry, the corresponding difference is very small (and reversed).
Some attention is paid to the factors that define the most effective angle of convergence. The angular coverage of the camera seems to be the most important factor.
The greater demand of accuracy in the reconstruction of the inner orientation in the convergent case than in the vertical one is also demonstrated.
๐ SIMILAR VOLUMES
Recently a three dimensional modelling of edge plasma transport in the TEXTOR-DED configuration has been carried out [1], using the 3D edge transport code, EMC3-EIRENE [2][3]. EMC3 solves the time-independent Braginskii's fluid equations for particle, momentum and energy [4], by a Monte Carlo scheme