Integrated Geophysical and Archaeological Investigations of Aquinum in Frosinone, Italy

Piro, Salvatore; Ceraudo, Giuseppe; Zamuner, Daniela

doi:10.1002/arp.409

Cited by 13 publications

(6 citation statements)

References 23 publications

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“…Neubauer et al ., ), single‐antenna instruments are still widely used, and the comparison of a few recent single‐antenna surveys shows a large variation in the profile spacing. It ranges from 0.1 m to 0.5 m, or from ~0.25 to ~4.25 times the dominant wavelength of the antenna (Böniger and Tronicke, ; Piro et al ., ; Novo et al ., ; Rogers et al ., ; Leucci et al ., ). Determination of the proper transect spacing is important because too coarse a sample interval causes aliasing: in the samples measured, high wavenumbers originating from diffractions with steep dips are misrepresented by lower wavenumbers (Yilmaz, ), so that the signal is distorted and the image of the buried archaeological structures can no longer be reconstructed unambiguously from the samples.…”

Section: Introductionmentioning

confidence: 99%

The Impact of Spatial Sampling and Migration on the Interpretation of Complex Archaeological Ground‐penetrating Radar Data

Verdonck

Taelman

Vermeulen

et al. 2015

Archaeological Prospection

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In this paper, the impact of spatial sample density and three-dimensional migration processing on the interpretation of archaeological ground-penetrating radar (GPR) data is assessed. First, the question of how to determine the sample interval required to take full advantage of the spatial resolution capabilities of GPR without oversampling is addressed. To this end, we transform a test profile into the frequency-wavenumber (f-k) domain and estimate the required sample interval from the wavenumber values. For the presented data set, collected at the Roman town Ammaia (Portugal), this resulted in a transect spacing approximately three times the distance prescribed by the λ min /4 criterion (where λ min is the minimum observed wavelength). Second, the effect of three-dimensional migration is assessed. The data set, sampled as prescribed by the analysis of the f-k plot, is migrated with two-and three-dimensional phase-shift algorithms, and the migrated results are compared with non-migrated data. It is shown that certain subtle features are better resolved by three-dimensional migration. Third, it is investigated whether three-dimensional migration following the application of an interpolation algorithm such as Delaunay triangulation or interpolation based on τ-p transform, can further relax spatial sampling requirements. For the GPR data shown in this article, it is demonstrated that interpolation and three-dimensional migration of slightly aliased data, collected with a transect spacing equal to five times the outcome of the λ min /4 criterion, still allow a faithful reconstruction of the original, non-aliased time-slices. Figure 5. Energy time-slices from between 31 and 32 ns, showing details from areas 1A and 1B, surveyed with a 0.05 m × 0.05 m grid spacing in east west and north south directions, respectively: (a and b) data after three-dimensional phase-shift migration; (c and d) data after two-dimensional phase-shift migration in in-line direction; (e and f) Unmigrated data. The large arrows show the direction of the survey lines. The numbers are explained in the text.

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Section: Introductionmentioning

confidence: 99%

The Impact of Spatial Sampling and Migration on the Interpretation of Complex Archaeological Ground‐penetrating Radar Data

Verdonck

Taelman

Vermeulen

et al. 2015

Archaeological Prospection

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“…Among various active geophysical techniques, electric and electromagnetic (em) methods are strongly effective for the detection of archaeological features located in the subsoil at different depths and scenarios [1][2][3][4][5][6][7]. Localization of anthropic structures placed in the soil is possible due to the contrast of the em physical properties between the materials constituting the buried objects and the subsoil where they are "preserved".…”

Section: Introductionmentioning

confidence: 99%

ERT and GPR Prospecting Applied to Unsaturated and Subwater Analogue Archaeological Site in a Full Scale Laboratory

et al. 2022

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Geophysical techniques are widely applied in the archaeological field to highlight variations of the physical behaviour of the subsoil due to the presence of ancient and buried remains., Considerable efforts are required to understand the complexity of the relationship between archaeological features and their geophysical response where saturated conditions occur. In the case of lacustrine and wetland scenarios, geophysical contrasts or electromagnetic signal attenuation effects drastically reduce the capabilities of the geophysical methodologies for the detection of structures in such conditions. To identify the capability of the electrical and electromagnetic methods in different water-saturated scenarios, an experimental activity was performed at the Hydrogeosite CNR laboratory. The test allowed us to analyze the limits and potentialities of an innovative approach based on the combined use of the ground-penetrating radar and 2D and 3D electrical resistivity tomographies. Results showed the effectiveness of the ground-penetrating radar for detecting archaeological remains also in quasi-saturated and underwater scenarios despite the em signal attenuation phenomena; whilst the results obtained involving the resistivity tomographies offered a new perspective for the archaeological purposes due to the use of the loop–loop shaped array. Moreover, the radar signal attenuation, resolution and depth of investigation do not allow to fully characterize the archaeological site as in the case of the scenarios with a limited geophysical contrast (i.e., water-saturated and arid scenarios). The experimental tests show that these limits can be only partially mitigated through the integration of the geophysical methodologies and further efforts are necessary for improving the results obtainable with an integrated use of the adopted geophysical methodologies.

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“…Depending on the inequalities between the emitted and received signal, various anomalies can be shown [25]. GPR has been used to discover previously unknown constructions [26][27] and provide useful information for the identification and characterization of archaeological remains buried at different depths [28].…”

Section: Introductionmentioning

confidence: 99%

Non-destructive Techniques Methodologies for the Detection of Ancient Structures under Heritage Buildings

Gil

Más

Lerma

et al. 2019

International Journal of Architectural Heritage

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Non-destructive techniques methodologies for the detection of ancient structures under heritage buildingsStructures and elements buried beneath heritage buildings are frequent but are often unknown and inaccessible. Therefore, they are difficult to locate in general if an archaeological excavation is not carried out, with the economic cost and time involved. It is important to discover them in order to increase our knowledge of cultural heritage, as well as to know, recover and improve the state of conservation of the materials that make up these structures. This paper presents methodologies for locating old structures using a low-cost NDT approach, with a qualitative and quantitative analysis of GPR profiles in heritage buildings. Small perforations are performed at critical points and introducing an endoscope for verification. Various crypts have been located using the proposed methodologies in a real study case: The Church of the Asución of Llíria in Spain.

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Integrated Geophysical and Archaeological Investigations of Aquinum in Frosinone, Italy

Cited by 13 publications

References 23 publications

The Impact of Spatial Sampling and Migration on the Interpretation of Complex Archaeological Ground‐penetrating Radar Data

The Impact of Spatial Sampling and Migration on the Interpretation of Complex Archaeological Ground‐penetrating Radar Data

ERT and GPR Prospecting Applied to Unsaturated and Subwater Analogue Archaeological Site in a Full Scale Laboratory

Non-destructive Techniques Methodologies for the Detection of Ancient Structures under Heritage Buildings

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