Seers, Thomas D. Hodgetts, David Supplemental material: Extraction of three-dimensional fracture trace maps from calibrated image sequences Geosphere, August 2016, v. 12, p. 1323-1340, doi:10.1130/GES01276.1, Supplemental Files - Stanford polygon format (.ply) files demonstrating different stages of the trace map feature extraction and analysis procedure detailed within the manuscript (Lacy's Caves, Vale of Eden, UK). Geoscience 2016-06-16
    https://gsapubs.figshare.com/articles/journal_contribution/Supplemental_material_Extraction_of_three-dimensional_fracture_trace_maps_from_calibrated_image_sequences/12188631
10.1130/GES01276.S1