Detection of Underground Anomalies by Evaluation of Ground Penetrating Radar Attribute Combination

Detection of underground utilities can be done by application of the ground penetrating radar (GPR) method. Diffraction or reflection phenomena of high-frequency electromagnetic waves provide tools and physics principles for imaging their locations, sizes, and even shapes. In urban zones, GPR machines equipped with shielded antennas are often used in common offset recording settings which provide high quality data after filtering most of artificial noises from the air. Although the data is still contaminated by different noises, the underground works are often recognized through appearances of different hyperbolae. In our paper, we apply different processing techniques for researching underground anomalies to map 3D metal gas pipes in Ba Ria–Vung Tau province, Vietnam. We have collected many 2D GPR profiles in 2019 and conducted a new technique of their 3D representation. In the new 3D representation, different GPR attributes as processed data and its maximum energy difference attribute are applied for defining the two metal gas pipes and revealing their other nearby anomalies as optical fiber cables.