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Version 2.05 May 2019 * The program gama-local for adjustment of local surveying networks used a C++ class Acord for computing approximate coordinates of adjusted points, if these were not explicitly given on input. Acord's computations were based on intersections (and local transformations if necessary) of the tuples of determining observations (for example a bearing and a distance). Gama-local expected input data to be free of blunders, which might be a strong assumption in practice. New class Acord2 was introduced as a robust alternative for typical two dimensional input configurations (Acord2 is not a complete general solution yet); the idea is to find all (or as many as possible) solutions of coordinates of a selected point and use their median as the robust position estimation. Algorithm Acord2 is followed by the original Acord intersections in gama-local, before the adjustment solution of the network. Acord2 is based on the master's thesis by Petra Millarová <petramillarova@gmail.com> |
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