A survey of the historic carvings at Carlisle Castle, Cumbria, using Structure-from-Motion photogrammetry and terrestrial laser scans

Author(s): Li Sou

Carlisle Castle situated in Carlisle, in the county of Cumbria, originated in the 12th century and was in use as a military base for 900 years. Many renovations and additions to the castle complex were made over time, and as such, a palimpsest of modifications can be found throughout many of the castle’s structures. Reflecting these changes through time are the carvings and graffiti that are scattered over the site. Prior to this project, many have never been officially recorded, and none of them have been surveyed using modern laser scanning and Structure from Motion (SFM) photogrammetric techniques. A programme of recording was undertaken by Li Sou, CIfA Specialist Placement in Geospatial Investigation Techniques, and Paul Bryan, Geospatial Imaging Manager. Within the castle keep a series of reliefs, known as the Prisoners’ Carvings, and a medieval door covered in etchings, were laser scanned, photographed and filmed. The datasets were then compared to examine the detail and quality of their outputs, to determine each technique’s suitability for recording such historic carvings. Additionally, photographic recording for SFM photogrammetry was undertaken for a Roman altar stone, medieval and postmedieval graffiti and carvings across the castle complex, to produce 3D models as a record of their current condition.

Report Number:
Research Department Reports


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