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From pseudo‐3D to full‐resolution GPR imaging of a complex Roman site
Author(s) -
Novo Alexandre,
Lorenzo Henrique,
Rial Fernando I.,
Solla Mercedes
Publication year - 2012
Publication title -
near surface geophysics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.639
H-Index - 39
eISSN - 1873-0604
pISSN - 1569-4445
DOI - 10.3997/1873-0604.2011016
Subject(s) - ground penetrating radar , geology , situated , regional geology , environmental geology , hydrogeology , archaeology , economic geology , seismology , remote sensing , radar , metamorphic petrology , geography , computer science , telecommunications , artificial intelligence , geotechnical engineering
This case history demonstrates how an extra effort applied to data acquisition can benefit the interpretation of 3D GPR data over a Roman site of great complexity situated in a semi‐urban area. Two surveys (during May 2007 and July 2008) were accomplished after Roman wall remains had been found, by chance, during soil removal work at Agro da Ponte (Lugo, NW Spain). The same 250 MHz antenna was used for both of them. The first campaign covered the entire area using a pseudo‐3D strategy (GPR lines spaced by 0.5 m), which was only enough for defining areas of interest and some archaeological features. Based on these results, the next campaign focused on a smaller area and was based on an ultra‐dense grid strategy (GPR lines spaced by 0.1 m), which eventually revealed full‐resolution images of walls, apses and chambers of a Roman villa.