Calculating the Vertical Displacement using the Method of Least Squares Adjustment and 3D Objects Fitting

Abstract

In this research, the Iraqi flagpole in Baghdad University, which is the longest flagpole in Baghdad, with a height of 75m, was monitored. According to the importance of this structure, the calculation of the displacement (vertical deviation) in the structure monitored using the Total Station device, where several observation were taken at different times for a period of two years the monitoring started from November 2016 until May 2017, at a rate four observations for one year. And the observation processed using the least square method, and the fitting of circles, then the data was processed and the deviation was calculated using Matlab program with calculating the values of corrections, where the mathematical laws have been programmed in a format that suits the program, observation have been entered and correction were made on them, calculating corrected values and the amount of error between the observed and calculated values. The deviation was between (0.720 to 0.759)m during the observation period. The Auto CAD program and the 3D MAX program used to product the two-dimensional (2D) and (3D) Models of the structure.