Combined adjustment of geodetic and non-geodetic data: applications in high-precision engineering surveying

The integration of specialised measurement devices or systems and geodetic techniques is often advantageous in terms of the increased measurement accuracy, efficiency and data sampling. In a measurement scheme, if there are data from both the non-geodetic devices or systems and the conventional geodetic instrumentations, all the measurement data should be adjusted simultaneously to obtain the optimum estimate of unknown parameters. This paper presents an adjustment model developed for the measurement of imperfections of large-scale steel silos. The adjustment model uses a rigorous combination of surface profile measurement data and geodetic observations in a least squares sense. -from Authors