The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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Articles | Volume XLVI-4/W4-2021
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLVI-4/W4-2021, 25–31, 2021
https://doi.org/10.5194/isprs-archives-XLVI-4-W4-2021-25-2021
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLVI-4/W4-2021, 25–31, 2021
https://doi.org/10.5194/isprs-archives-XLVI-4-W4-2021-25-2021

  07 Oct 2021

07 Oct 2021

SMARTPHONE-BASED REALITY CAPTURE FOR SUBSURFACE UTILITIES: EXPERIENCES FROM WATER UTILITY COMPANIES IN DENMARK

L. H. Hansen1, T. M. Pedersen2, E. Kjems1, and S. Wyke1 L. H. Hansen et al.
  • 1Department of the Built Environment, Aalborg University, Denmark
  • 2LE34 A/S, Copenhagen, Denmark

Keywords: Reality Capture, point clouds, photogrammetry, subsurface utilities, as-built documentation, water pipes

Abstract. Inaccurate and inconsistent documentation of subsurface utilities is a reoccurring problem in the construction industry affecting not only the end-users, but all actors involved in designing, constructing, and maintaining pipes, cables and other utilities hidden underground. In this study, a new method for 3D capturing of subsurface utilities, based on a newly developed Smartphone-based Reality Capture (RC) solution is explored. The research was divided into two parts. Firstly a testing of the method accuracy and secondly, an investigation of the usability of the method. The research results firstly showed that the RC solution is a feasible surveying method, that facilitate capturing of as-built utility assets, which can be used as a supporting tool to conventional surveying methods or alone, as the testing showed an accuracy of ±5 cm for the generated point clouds. Secondly the usability testing revealed that the RC solution benefited the utility owners by allowing time-savings on construction projects, as well as generating visual-realistic 3D models of exposed subsurface utilities to be used for quality assurance and planning of future utility work.