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Alfredo Mayoral

Equipe "Paléoenvironnement et Géoarchéologie"
Contact :
Tél : +33 (0)4 73 34 68 23
Fax : +33 (0)4 73 34 68 24

I currently work at the GEOLAB UMR 6042 UCA-CNRS, Université Clermont Auvergne, in central France. My research concerns geomorphology, geoarchaeology, and multi-proxy palaeoenvironmental studies. I am interested in pre- and protohistoric socio-environmental interaction, and especially in anthropogenic impacts linked with the emergence of proto-urbanization processes.

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ACL - Articles dans des revues à comité de lecture


  • Mayoral Alfredo, TOUMAZET Jean-Pierre, François-Xavier Simon, Vautier Franck et Peiry Jean-Luc (2017) « The Highest Gradient Model: A New Method for Analytical Assessment of the Efficiency of LiDAR-Derived Visualization Techniques for Landform Detection and Mapping », Remote Sensing, 9 (2) (février), p. 120. DOI : 10.3390/rs9020120.
    Résumé : ALS-derived raster visualization techniques have become common in recent years, opening up new possibilities for subtle landform detection in earth sciences and archaeology, but they have also introduced confusion for users. As a consequence, the choice between these visualization techniques is still mostly supported by empirical knowledge. Some attempts have been made to compare these techniques, but there is still a lack of analytical data. This work proposes a new method, based on gradient modelling and spatial statistics, to analytically assess the efficacy of these visualization techniques. A selected panel of outstanding visualization techniques was assessed first by a classic non-analytical approach, and secondly by the proposed new analytical approach. The comparison of results showed that the latter provided more detailed and objective data, not always consistent with previous empirical knowledge. These data allowed us to characterize with precision the terrain for which each visualization technique performs best. A combination of visualization techniques based on DEM manipulation (Slope and Local Relief Model) appeared to be the best choice for normal terrain morphometry, occasionally supported by illumination techniques such as Sky-View Factor or Negative Openness as a function of terrain characteristics.
    Mots-clés : highest gradient model, landforms detection, LiDAR, microtopography, spatial statistics, visualization techniques.

C-ACT - Communications avec publication dans des actes


  • Mayoral Alfredo, Simon François-Xavier, Vautier Franck et Miras Yannick (2015) « Premiers résultats des volets géoarchéologie et géomatique du programme interdisciplinaire AYPONA (Paysages et visages d'une agglomération clermontoise: approche intégrée et diachronique de l'occupation de l'oppidum de Corent, Auvergne, France) », in Journée régionale de l'archéologie Auvergne, Clermont-Ferrand, France : DRAC Auvergne.
    Mots-clés : Géoarchéologie, Géophysique, LiDAR, paléoenvironnement.

C-AFF - Affiches / posters dans une conférence nationale ou internationale


  • Mayoral Alfredo, Peiry Jean-Luc, Berger Jean-François, Poux Matthieu, Milcent Pierre-Yves, Vautier Franck et Miras Yannick (2014) « An integrated geoarchaeological approach to assess human forcing on landscape: evolution of an Iron Age oppidum (Auvergne, France) » (poster), présenté à XVII World UISPP congress, session 46 "Iron Age communities in western-central Europe: new approaches to landscape and identity, September 1-6, Burgos, Spain.

AP - Autres publications