Factors Influencing Measurement Accuracy of Unmanned Aerial Systems (UAS) and Photogrammetry in Construction Earthwork

Earthwork is one of the major components of construction projects. In recent years, unmanned aerial systems (UAS) as a data acquisition platform is becoming attractive for many surveying applications in construction. This work identifies the effects of various flight parameters and construction materials on the measurement accuracy and operational efficiency of UAS. Flight altitudes of 60, 90, 120, and 150 feet above ground level, two image overlapping rates (70% and 90%), and four common types of earthwork material with the use of 16 ground control points (GCPs), are chosen to analyze their influence on the positional errors through multiple comprehensive comparisons and statistical analysis. The results indicate that the use of GCPs is the most influential factor. However, it is necessary to obtain a balance among all factors because no single factor is able to improve the spatial quality of the model if others do not also perform well.

Language

  • English

Media Info

  • Media Type: Web
  • Features: References;
  • Pagination: pp 408-414
  • Monograph Title: Computing in Civil Engineering 2019: Data, Sensing, and Analytics

Subject/Index Terms

Filing Info

  • Accession Number: 01708148
  • Record Type: Publication
  • ISBN: 9780784482438
  • Files: TRIS, ASCE
  • Created Date: Jun 13 2019 3:04PM