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

Abstract

The quality of Local Geodetic Network (LGN) for technical and scientific purposes is very important from many points of view. These netsrequire compatible points (given and new ones), measurements among points without blunders and reliable determination of approximatecoordinates 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 areintroduced and demonstrated in adjustments of a trilateral net using the standard, constrained adjustment (GMM of full rank with minimumconstraints) and the interactively reweighed Least-Square Robust Adjustment. From analyses of their solutions can be by convenient introducedmethods determined and identificy all errors in the net measurements.

Keywords

• Local Geodetic Network
• Method of least squares
• robust adjustment
• weight iteration adjustment