3-D modelling and visualization of large building using photogrammetric approach

  • Dr Raad College of Engendering University of Duhok
  • Dr Farsat College of Engineering, University of Duhok
  • Mr Gilyana College of Engineering, University of Duhok
  • Mr Yousif College of Engineering, University of Duhok,

Abstract

Abstract

    The progress in modern technologies such as precise light weight cameras mounted on unmanned aerial vehicles (UAV) and the more user-friendly software in the photogrammetric field, allows for 3-D model construction of any structure or shape. Software now achieve in sequence the processes of matching, generating tie points, block bundle adjustment and generating digital elevation models.

  The aim of this study is to make a virtual 3-D model of the college of engineering /University of Duhok. Kurdistan region, Iraq.  The data input is vertical and oblique imagery acquired by UAV, ground control points distributed on the surrounded ground, facades, and roof. Ground control points were measured by the GPS RTK system in addition to the reflectorless total station instrument. The data is processed mainly using Agisoft PhotoScan software as well as the Global Mapper and the ReCap software. The output is a 3-D model, digital elevation model and orthomosaic.

 Geometric and visual inspections were carried out. Some imperfections appeared on sharp edges and parapets of the building. In the geometric accuracy of selected points on the building, the maximum standard deviation in the coordinates was ±4cm. The relative accuracy in distance measurements were in the range of 0.72% to 4.92 %

Author Biographies

Dr Raad, College of Engendering University of Duhok

Dr Raad is assistant professor at the surveying engineering department  university of Duhok/ Kurdistan Region, Iraq

Dr Farsat , College of Engineering, University of Duhok

Dr Farsat Heeto is the head of surveying engineering department University of Duhok /Kurdistan Region, Iraq

Mr Gilyana, College of Engineering, University of Duhok

Mr Sami is a lecturer at the surveying enginerring department University of Duhok/Kurdistan Region, Iraq

Mr Yousif, College of Engineering, University of Duhok,

Mr Yousif is a lecturer at the surveying engineering department univesity of Duhok/ Kurdistan Region, Iraq

Published
2021-11-03
Section
Architecture