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A low‐cost open‐source workflow to generate georeferenced 3D SfM photogrammetric models of rocky outcrops
Author(s) -
Froideval Laurent,
Pedoja Kevin,
Garestier Franck,
Moulon Pierre,
Conessa Christophe,
Pellerin Le Bas Xavier,
Traoré Kalil,
Benoit Laurent
Publication year - 2019
Publication title -
the photogrammetric record
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.638
H-Index - 51
eISSN - 1477-9730
pISSN - 0031-868X
DOI - 10.1111/phor.12297
Subject(s) - photogrammetry , workflow , software , computer science , structure from motion , georeference , remote sensing , 3d modeling , orthophoto , point cloud , geography , computer vision , motion (physics) , database , physical geography , programming language
Structure‐from‐Motion (SfM) software and unmanned aerial vehicles ( UAV s) have been increasingly adopted in the geosciences. The current mainstream generation of 3D models is still expensive as it relies on UAV s, Differential Global Navigation Satellite System ( DGNSS ) ground control points and commercial software. This paper proposes an end‐to‐end reproducible SfM workflow with minimal legal, financial or field issues. The procedure avoids both UAV s and DGNSS and relies on open‐source software. Interlocked models of a rocky shore in Normandy, France were generated at different scales and point densities, being georeferenced using free spatial data. A spherical target was used for scaling and assessing the relative accuracy, which was better than 1 cm.