3D GPR survey for the archaeological characterization of the ancient Messapian necropolis in Lecce, South Italy

Abstract

Extensive urbanization may cover important archaeological structures that are still buried in urban areas, andGround Penetrating Radar is one of the most reliable geophysical technique for resolving buried archaeologicalstructures in urban territories. In this paper a case study that involves a geophysical surveyemploying the surfacethree-dimensional (3D) GPR techniques, to characterize the investigated areas from the archaeological point ofview, is illustrated. GPR measurements, integrated with archaeological and topographical information aimed atthe production of a digital archaeological map integrated in a webGIS platform, were carried out in some areasat the historical centre of Lecce (Apulia, Italy). The investigated areas are related to somesectors of theMessapiannecropolises (dated mainly in 4th-3rd century BCE), characterized by different types of graves (pits dug in thebedrock or built with slabs, sarcophagi and hypogea) that lying also inside the settlement surrounded by citywalls. The survey was carried out using the IDS Hi Mod georadar system, incorporating a dual band 200-600 MHz centre frequency antennae. The GPR time slices were constructed from closely spaced parallel profiles.The time slices, computed from averaging radar reflections over vertical time windows several nanosecondsthick, are used to map subsoil features associatedwith its structure. The time sliceswere georeferenced in the archaeologicalmap of Lecce in order to acquire new data on the distribution and the ancient topography of the funeraryareas inside the settlements. Moreover, to facilitate the interpretation of the results, a three-dimensionalimage was constructed using closely spaced parallel profiles, which are interpolated.


Tutti gli autori

  • G. Leucci ; L. De Giorgi; G. Di Giacomo; I. Ditaranto; I. Miccoli; G. Scardozzi

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Anno di pubblicazione

2016

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