The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences (Jun 2024)

The Legacy of Sycamore Gap: The Potential of Photogrammetric AI for Reverse Engineering Lost Heritage with Crowdsourced Data

  • L. Morelli,
  • L. Morelli,
  • G. Mazzacca,
  • G. Mazzacca,
  • P. Trybała,
  • F. Gaspari,
  • F. Ioli,
  • Z. Ma,
  • F. Remondino,
  • K. Challis,
  • A. Poad,
  • A. Turner,
  • J. P. Mills

DOI
https://doi.org/10.5194/isprs-archives-XLVIII-2-2024-281-2024
Journal volume & issue
Vol. XLVIII-2-2024
pp. 281 – 288

Abstract

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The orientation of crowdsourced and multi-temporal image datasets presents a challenging task for traditional photogrammetry. Indeed, traditional image matching approaches often struggle to find accurate and reliable tie points in images that appear significantly different from one another. In this paper, in order to preserve the memory of the Sycamore Gap tree, a symbol of Hadrian's Wall that was felled in an act of vandalism in September 2023, deep-learning-based features trained specifically on challenging image datasets were employed to overcome limitations of traditional matching approaches. We demonstrate how unordered crowdsourced images and UAV videos can be oriented and used for 3D reconstruction purposes, together with a recently acquired terrestrial laser scanner point cloud for scaling and referencing. This allows the memory of the Sycamore Gap tree to live on and exhibits the potential of photogrammetric AI (Artificial Intelligence) for reverse engineering lost heritage.