Influence of bad measurements in establishment of 2D Local Geodetic Network

The quality of Local Geodetic Network ( LGN) for technical and scientific purposes is very important from many points of view. These nets require compatible points ( given and new ones), measurements among points without blunders and reliable determination of approximate coordinates for the new ( to be established) points. If some from the 3 mentioned requirements is not fulfilled for the network computation, the various results from the net adjustments are defective and unusable. In the present treatise, all requirements for faultless measurements are introduced and demonstrated in adjustments of a trilateral net using the standard, constrained adjustment ( GMM of full rank with minimum constraints) and the interactively reweighed Least-Square Robust Adjustment. From analyses of their solutions can be by convenient introduced methods determined and identificy all errors in the net measurements.