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Archaeology and coastal erosion: monitoring change through 3D digital techniques

AuthorsLópez-Romero, Elías ; Mañana-Borrazás, Patricia ; Güimil-Fariña, Alejandro ; Daire, Marie-Yvane
KeywordsPaisaje costero
Coastal landscape
Documentación 3D
3D record
Fotogrametría terrestre
Close-range photogrammetry
Instituto de Ciencias del Patrimonio
Issue Date28-Aug-2014
AbstractAt present, sea-level rise is one visible effect of climate change, and human activity is also threatening much coastal and island territory on a global scale. The vulnerability of coastal heritage is increasingly coming into focus, particularly in areas such as the European Atlantic façade, where the combined results of sea-level rise, coastal environment dynamics and human activity are significantly altering the coastline. In this context, one of the aims of the eSCOPES Project (Evolving spaces: coastal landscapes of the Neolithic in the European Land's Ends, Marie Curie-IEF) is to provide cost-effective tools for monitoring at-risk coastal archaeological sites. The project uses close-range photogrammetric techniques ('Structure from Motion') to record, 3D model and monitor changes in the architecture of selected megalithic monuments in three areas of the European Atlantic façade: the isle of Coalen (Côtes-d'Armor, Brittany, France), the Pénestin peninsula (Morbihan, Brittany, France) and the isle of Guidoiro Areoso (Ría de Arousa, Galicia, Spain). The sites have been chosen taken into account their location in different environmental settings, their different structural characteristics and their high vulnerability. In addition to the photogrammetric record, a 3D laser scanning has recently been performed in Guidoiro Areoso in order to provide a series of comparative reference models. The project is still ongoing. Two fieldwork campaigns have so far taken place (September 2013 and February-March 2014). As a result, we have obtained more than 1200 photographs for each site so far. Several palaeosols and structures associated with, or in close proximity to, the megalithic monuments have also been documented. A third and last fieldwork campaign will take place in September 2014. Some preliminary 3D models have already been obtained and are being object of in-depth analysis. The use of close-range photogrammetry appears as a cost-effective way to efficiently apprehend coastal archaeological site erosion. The comparison of the 3D models for each site (surface loss, quantitative analysis) will provide a three-dimensional cuantitative and a visual estimate of the erosion rate for the archaeological sites, constituting a powerful tool for decision-making processes to inform best practice in managing coastal heritage. Additionally, the detailed three-dimensional record of the selected case studies will also allow safeguard the potential for architectural analysis of the sites even in the event of severe damage or destruction
DescriptionThis presentation supported the oral communication carried out on 2 September 2014 in the sesion "A4b The scientific value of 3D archaeology" of the XVII World UISPP Congress, celebrated in Burgos.
Appears in Collections:(INCIPIT) Comunicaciones congresos
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