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Alfredo Mayoral

Doctorant/PhD student_ Equipe "Paléoenvironnement et Géoarchéologie" JPEG
Contact : alfredo.mayoral@etudiant.univ-bpclermont.fr
Tél : +33 (0)4 73 34 68 23
Fax : +33 (0)4 73 34 68 24

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Publications

ACL - Articles dans des revues à comité de lecture

2017


  • Mayoral Pascual Alfredo, TOUMAZET Jean-Pierre, François-Xavier Simon, Vautier Franck et Peiry Jean-Luc« 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), p. 120. DOI : 10.3390/rs9020120. https://hal.archives-ouvertes.fr/hal-01464694.
    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

2014

  • Mayoral Pascual Alfredo, Peiry Jean-Luc, Berger Jean-François, Poux Matthieu, Milcent Pierre-Yves, Vautier Franck et Miras Yannick« An integrated geoarchaeological approach to assess human forcing on landscape: evolution of an Iron Age oppidum (Auvergne, France) » (présenté à XVII World UISPP congress, session 46 "Iron Age communities in western-central Europe: new approaches to landscape and identity), in Poster, September 1-6, Burgos, Spain : poster. https://hal.archives-ouvertes.fr/hal-01112300.