{ "name": "GPRbase — Free Ground Penetrating Radar Datasets", "description": "Open catalog of free real-world GPR datasets. Raw DZT files under CC BY-NC-SA 4.0.", "url": "https://www.gprbase.com", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "api": { "catalog": "https://www.gprbase.com/api/datasets.json", "dataset": "https://www.gprbase.com/api/datasets/{id}.json" }, "count": 31, "countPublic": 30, "generatedAt": "2026-09-20T17:45:08+00:00", "datasets": [ { "id": "ds001", "title": "3D Grid Concrete bloc wall with voids", "title_fr": "Grille 3D - Mur en blocs à bancher avec des vides", "description": "3D grid 60x60 cm created with the FLEX NX radar, 3D mode (26 profiles per antenna)\n\nSpacing : 5 cm\nOrigin (0,0) : bottom-left", "description_fr": "Grille 3D 60x60 cm réalisée avec le radar FLEX NX, mode 3D (26 profils par antenne)\n\nEspacement : 5 cm\nOrgine (0,0) : bas - gauche", "applications": [ "beton" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "FLEX NX", "frequency_mhz": "2500", "format": "DZT", "dataType": "raw", "fileCount": 26, "targets": [ "voids", "concrete block wall" ], "contributor": "MDSLab", "datePublished": null, "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 2, "gpsAvailable": false, "groundTruth": "verified", "groundTruthMethod": "Visual inspection", "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds001-3d-grid-concrete-bloc-wall-with-voids/", "url_fr": "https://www.gprbase.com/dataset/ds001-grille-3d-mur-en-blocs-a-bancher-avec-des-vides/", "publisher": "GPRbase" }, { "id": "ds002", "title": "Georeferenced dual-frequency ground-penetrating radar (GPR RTK) files", "title_fr": "Profils DF géoréférencés (GPS) montrant des sols hétérogènes dans un parking", "description": "16 Radar profiles in a parking lot, showing heterogeneous soil conditions. The data is georeferenced and can be imported into GPRviewer for 2D/3D processing. The dataset is also useful for demonstrating possible processing on both 300 and 800 MHz antennas.", "description_fr": "16 profils radar dans un parking, montrant des sols hétérogènes. Les données sont géoréférencées et peuvent être importées dans GPRviewer pour traitements en 2D / 3D. Le set de données est également intéressant pour montrer les traitements possibles sur les deux antennes 300 et 800 MHz.", "applications": [ "geotech", "geosciences" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "UtilityScan DF", "frequency_mhz": "300/800", "format": "DZT", "dataType": "raw", "fileCount": 16, "targets": [ "heterogeneous soils", "RTK positioning" ], "contributor": "MDSLab", "datePublished": null, "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 2, "gpsAvailable": true, "groundTruth": "partial", "groundTruthMethod": null, "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds002-georeferenced-dual-frequency-ground-penetrating-radar-gpr/", "url_fr": "https://www.gprbase.com/dataset/ds002-profils-df-georeferences-gps-montrant-des-sols-heterogenes/", "publisher": "GPRbase" }, { "id": "ds003", "title": "FLEX, NX25 and NX15 reference lines (MDSLab)", "title_fr": "Ligne de référence FLEX, NX25 et NX15 (MDSLab)", "description": "Three radar profiles were created on the same line, one of our reference lines in the MDSLab in Aix-en-Provence. Compare the measurements of the three files from the FLEX GSSI range!", "description_fr": "3 profils radar réalisés sur la même ligne, une de nos lignes de références dans le MDSLab à Aix en Provence. Comparez les mesures des 3 fichiers de la gamme FLEX GSSI ! Testez la cross-polarisation avec le fichier du FLEX NX.", "applications": [ "beton" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "FLEX NX;NX25;NX15", "frequency_mhz": "2500;1500", "format": "DZT", "dataType": "raw", "fileCount": 3, "targets": [ "reference line", "antenna comparison", "cross-polarisation" ], "contributor": "MDSLab", "datePublished": null, "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 2, "gpsAvailable": false, "groundTruth": "verified", "groundTruthMethod": "MDSLab Line of Reference", "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds003-flex-nx25-and-nx15-reference-lines-mdslab/", "url_fr": "https://www.gprbase.com/dataset/ds003-ligne-de-reference-flex-nx25-et-nx15-mdslab/", "publisher": "GPRbase" }, { "id": "ds004", "title": "Double layer of reinforcement and structural change (1 profile)", "title_fr": "Double nappe d'armatures et changement de structure (1 profil)", "description": "One radargram. Two identifiable steel layers, the second being more difficult to discern. A change in structure is also visible before 50 cm (distance).", "description_fr": "Un radargramme. Deux lits d'aciers identifiables, le deuxième étant plus difficile à mettre en évidence (intéressant pour expliquer le phénomène d'atténuation). On distingue également un changement de structure dans les 50 cm premiers centimètres, que pouvez-vous en dire ?", "applications": [ "beton" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "StructureScan Mini XT/LXT", "frequency_mhz": "2700", "format": "DZT", "dataType": "raw", "fileCount": 1, "targets": [ "double rebar layer", "structural change", "attenuation" ], "contributor": "MDSLab", "datePublished": null, "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 1, "gpsAvailable": false, "groundTruth": "partial", "groundTruthMethod": null, "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds004-double-layer-of-reinforcement-and-structural-change-1/", "url_fr": "https://www.gprbase.com/dataset/ds004-double-nappe-d-armatures-et-changement-de-structure-1-profil/", "publisher": "GPRbase" }, { "id": "ds005", "title": "Double mesh tightly embedded in a concrete slab with varying concrete cover", "title_fr": "Double treillis resserré dans une dalle en béton armé avec variations d’enrobage", "description": "GPR profile showing a double reinforcement mesh in a concrete slab. The two rebar layers are closely spaced, creating overlapping hyperbolas. The scan reveals varying concrete cover depths across the profile, demonstrating typical signal interference patterns in dense reinforcement configurations.", "description_fr": "Profil GPR montrant un double treillis d'armatures dans une dalle béton. Les deux nappes d'acier sont rapprochées, créant des hyperboles superposées. L'acquisition révèle des variations d'enrobage sur le profil, illustrant les phénomènes d'interférence typiques des configurations à forte densité d'armatures.", "applications": [ "beton" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "StructureScan LT", "frequency_mhz": "1600", "format": "DZT", "dataType": "raw", "fileCount": 1, "targets": [ "double welded mesh", "concrete cover variation" ], "contributor": "MDS Courbevoie", "datePublished": null, "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "pro", "channels": 1, "gpsAvailable": false, "groundTruth": "partial", "groundTruthMethod": null, "isAccessibleForFree": false, "isAccessibleForPro": true, "url": null, "url_fr": null, "publisher": "GPRbase" }, { "id": "ds006", "title": "FLEX 3D grid 60 x 60 cm (reinforced concrete beam and slab).", "title_fr": "Grille FLEX 3D 60 x 60 cm (longrine et dalle béton armé)", "description": "INLINE (channel 1) and CROSS-LINE (channel 2) profiles: 26 profiles, 13 in X, 13 in Y (5 cm spacing)", "description_fr": "Profils INLINE (channel 1) et CROSSLINE (channel 2) : 26 Profils, 13 en X, 13 en Y (espacement 5 cm)", "applications": [ "beton" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "FLEX NX", "frequency_mhz": "2500", "format": "DZT", "dataType": "raw", "fileCount": 26, "targets": [ "beam", "slab", "3D grid" ], "contributor": "IUT Aix Marseille", "datePublished": null, "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 2, "gpsAvailable": false, "groundTruth": "partial", "groundTruthMethod": null, "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds006-flex-3d-grid-60-x-60-cm-reinforced-concrete-beam-and-slab/", "url_fr": "https://www.gprbase.com/dataset/ds006-grille-flex-3d-60-x-60-cm-longrine-et-dalle-beton-arme/", "publisher": "GPRbase" }, { "id": "ds007", "title": "Detection of a backfilled marl pit beneath a road", "title_fr": "Détection d'une marnière comblée sous chaussée", "description": "This profile shows a measurement taken at the level of a roadway, with the presence of a marl pit that has been filled in. Several layers of earthwork with different properties are clearly visible, compared to the very homogeneous and attenuating surrounding soil.", "description_fr": "Ce profil présente une mesure au droit d’une chaussée avec présence d’une marnière qui a été comblée. On y distingue clairement plusieurs couches de terrassement aux propriétés différentes du terrain encaissant très homogène et atténuant.", "applications": [ "geotech" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "UtilityScan DF", "frequency_mhz": "300/800", "format": "DZT", "dataType": "raw", "fileCount": 1, "targets": [ "backfilled marl pit", "earthwork layers" ], "contributor": "MDS Courbevoie", "datePublished": null, "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 2, "gpsAvailable": false, "groundTruth": "partial", "groundTruthMethod": null, "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds007-detection-of-a-backfilled-marl-pit-beneath-a-road/", "url_fr": "https://www.gprbase.com/dataset/ds007-detection-d-une-marniere-comblee-sous-chaussee/", "publisher": "GPRbase" }, { "id": "ds008", "title": "Detection of various buried utilities using a dual-frequency antenna (300 MHz and 800 MHz)", "title_fr": "Croisement de différents réseaux enterrés avec une antenne double fréquence 300 MHz et 800 MHz", "description": "One GPR profile across an avenue, crossing several buried utilities. How many do you see?", "description_fr": "Un profil GPR en travers d'une avenue, croisant plusieurs réseaux enterrés. Combien en voyez-vous ?", "applications": [ "reseaux" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "UtilityScan DF", "frequency_mhz": "300/800", "format": "DZT", "dataType": "raw", "fileCount": 1, "targets": [ "multiple buried utilities" ], "contributor": "MDSLab", "datePublished": "2026-01-07", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 2, "gpsAvailable": false, "groundTruth": "verified", "groundTruthMethod": "DT_DICT maps, Electromagnetic (EM) detection", "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds008-detection-of-various-buried-utilities-using-a-dual/", "url_fr": "https://www.gprbase.com/dataset/ds008-croisement-de-differents-reseaux-enterres-avec-une-antenne/", "publisher": "GPRbase" }, { "id": "ds009", "title": "Two layers of rebars in a reinforced concrete structure (3D grid)", "title_fr": "Deux nappes d'armatures légèrement décalées (grille 3D)", "description": "26 profiles (60 x 60cm grid), 5cm spacing. Ideal dataset for practicing 3D processing with GPRviewer, and easier to see the best possible rendering (migration, color palette, gains, etc...).", "description_fr": "26 profils (grille 60 x 60cm), espacements de 5 cm. Set de données idéal pour s'entraîner à traiter en 3D avec GPRviewer, et essayer d'avoir le meilleur rendu possible (migration, palette de couleurs, gains, etc... ).", "applications": [ "beton" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "StructureScan Mini XT/LXT", "frequency_mhz": "2700", "format": "DZT", "dataType": "raw", "fileCount": 26, "targets": [ "double rebar layer", "3D grid" ], "contributor": "MDSLab", "datePublished": "2026-01-07", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 1, "gpsAvailable": false, "groundTruth": "partial", "groundTruthMethod": null, "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds009-two-layers-of-rebars-in-a-reinforced-concrete-structure-3d/", "url_fr": "https://www.gprbase.com/dataset/ds009-deux-nappes-d-armatures-legerement-decalees-grille-3d/", "publisher": "GPRbase" }, { "id": "ds010", "title": "Highway pavement inspection along an emergency stopping lane (ESL)", "title_fr": "Auscultation de chaussée autoroutière le long d'une bande d'arrêt d'urgence (BAU)", "description": "Six dual-frequency ground-penetrating radar (GPR) profiles (300/800 MHz) showing numerous interfaces and pavement structure layers in a soil context highly favorable to GPR. This dataset is very useful for practicing thickness determination (and mapping) in GPRviewer.", "description_fr": "Six profils géoradar double fréquence (300/800 MHz) montrant de nombreuses interfaces et couches de structures de chaussée, dans un contexte de sol très favorable au GPR. Ce set de données est très intéressant pour s'entraîner à pointer des épaisseurs (et cartographies) dans GPRviewer.", "applications": [ "geotech", "routes" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "UtilityScan DF", "frequency_mhz": "300/800", "format": "DZT", "dataType": "raw", "fileCount": 6, "targets": [ "pavement interfaces", "layer thickness" ], "contributor": "MDSLab", "datePublished": "2026-01-07", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 2, "gpsAvailable": false, "groundTruth": "partial", "groundTruthMethod": null, "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds010-highway-pavement-inspection-along-an-emergency-stopping/", "url_fr": "https://www.gprbase.com/dataset/ds010-auscultation-de-chaussee-autoroutiere-le-long-d-une-bande-d/", "publisher": "GPRbase" }, { "id": "ds011", "title": "Ground-penetrating radar detection of gas connections (HDPE polyethylene)", "title_fr": "Détection géoradar de branchements PE gaz (Polyéthylène PEHD)", "description": "4 dual-frequency ground-penetrating radar profiles (UtilityScan DF) showing the location of HDPE (High-Density Polyethylene) gas connections", "description_fr": "4 profils géoradar double fréquence (UtilityScan DF) montrant la présence de branchements de gaz en PEHD (Polyéthylène haute densité)", "applications": [ "reseaux" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "UtilityScan DF", "frequency_mhz": "300/800", "format": "DZT", "dataType": "raw", "fileCount": 4, "targets": [ "gas service connection", "HDPE" ], "contributor": "MDSLab", "datePublished": "2026-01-09", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 2, "gpsAvailable": false, "groundTruth": "partial", "groundTruthMethod": null, "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds011-ground-penetrating-radar-detection-of-gas-connections-hdpe/", "url_fr": "https://www.gprbase.com/dataset/ds011-detection-georadar-de-branchements-pe-gaz-polyethylene-pehd/", "publisher": "GPRbase" }, { "id": "ds012", "title": "3D concrete scanning over a slab-access ramp interface", "title_fr": "Acquisition 3D au niveau du renforcement d'une liaison dalle - rampe d'accès en béton armé", "description": "60 x 60 cm 3D grid (10 cm spacing). Starting point at bottom left (0,0) and profiles from left to right, then from bottom to top. Try to reconstruct the plan view (C-SCAN or time-slice) from this dataset!", "description_fr": "Grille 3D de dimension 60 x 60 cm (espacement tous les 10 cm). Départ en bas à gauche (0,0) et profils de gauche à droite, puis de bas en haut. Essayez de reconstituer la vue en plan (C-SCAN ou time-slice) à partir de ce set de données !", "applications": [ "beton" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "StructureScan Mini XT/LXT", "frequency_mhz": "2700", "format": "DZT", "dataType": "raw", "fileCount": null, "targets": [ "slab-ramp interface", "reinforcement" ], "contributor": "MDSLab", "datePublished": "2026-01-09", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 1, "gpsAvailable": false, "groundTruth": "partial", "groundTruthMethod": null, "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds012-3d-concrete-scanning-over-a-slab-access-ramp-interface/", "url_fr": "https://www.gprbase.com/dataset/ds012-acquisition-3d-au-niveau-du-renforcement-d-une-liaison/", "publisher": "GPRbase" }, { "id": "ds013", "title": "Detection of buried pipes with the NX15 step-frequency ground-penetrating radar antenna", "title_fr": "Détection de réseaux enterrés avec l'antenne géoradar NX15 à saut de fréquence", "description": "High resolution imaging with the NX15 antenna, for detecting buried cables and pipes. Observe the data quality, ideal for locating small-diameter connections, and promising for HDPE gas connections !", "description_fr": "Imagerie très haute résolution avec l'antenne NX15, pour la détection de câbles et canalisations enterrés. Observez la finesse de l'imagerie, intéressante pour la localisation de branchements de petits diamètres, prometteur pour les branchements gaz en PEHD !", "applications": [ "reseaux" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "NX15", "frequency_mhz": "1500", "format": "DZT", "dataType": "raw", "fileCount": 1, "targets": [ "buried pipes", "buried cables", "small diameter services" ], "contributor": "MDSLab", "datePublished": "2026-01-11", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 1, "gpsAvailable": false, "groundTruth": "partial", "groundTruthMethod": null, "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds013-detection-of-buried-pipes-with-the-nx15-step-frequency/", "url_fr": "https://www.gprbase.com/dataset/ds013-detection-de-reseaux-enterres-avec-l-antenne-georadar-nx15/", "publisher": "GPRbase" }, { "id": "ds014", "title": "Voids in a concrete block wall", "title_fr": "Vides dans un mur en agglos blocs à bancher", "description": "FLEX NX file, dual antenna (inline & cross-line), created on a concrete block wall with gaps (no concrete) at the end of the profile. Test the merging of the two antennas with GPRviewer software!", "description_fr": "Fichier FLEX NX, double antenne (inline & cross-line), réalisé sur un mur en agglos blocs à bancher, présentant des vides (absence de béton) en fin de profil. Testez la fusion des 2 antennes avec le logiciel GPRviewer !", "applications": [ "beton" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "FLEX NX", "frequency_mhz": "2500", "format": "DZT", "dataType": "raw", "fileCount": 1, "targets": [ "voids", "channel merging" ], "contributor": "MDSLab", "datePublished": "2026-01-11", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 2, "gpsAvailable": false, "groundTruth": "partial", "groundTruthMethod": null, "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds014-voids-in-a-concrete-block-wall/", "url_fr": "https://www.gprbase.com/dataset/ds014-vides-dans-un-mur-en-agglos-blocs-a-bancher/", "publisher": "GPRbase" }, { "id": "ds015", "title": "Thickness detection above three masonry bridge arches", "title_fr": "Détection des épaisseurs au-dessus de trois voûtes de pont en maçonnerie", "description": "Ground-penetrating radar measurements recorded with UtilityScan DF 300/800 MHz from the roadway", "description_fr": "Mesures réalisées avec UtilityScan DF 300/800 MHz depuis la chaussée", "applications": [ "beton" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "UtilityScan DF", "frequency_mhz": "300/800", "format": "DZT", "dataType": "raw", "fileCount": 1, "targets": [ "masonry bridge arches", "backfill thickness" ], "contributor": "DEM Ingénierie", "datePublished": "2026-01-29", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 2, "gpsAvailable": false, "groundTruth": "partial", "groundTruthMethod": null, "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds015-thickness-detection-above-three-masonry-bridge-arches/", "url_fr": "https://www.gprbase.com/dataset/ds015-detection-des-epaisseurs-au-dessus-de-trois-voutes-de-pont/", "publisher": "GPRbase" }, { "id": "ds016", "title": "Reinforced Concrete Slab with Expansion Joint", "title_fr": "Dalle en béton armé avec joint de dilatation", "description": "GPR dataset containing 7 files collected on a reinforced concrete slab using a GSSI FLEX NX structure-scanning radar. The data clearly show reinforcing bars (rebar) and an expansion joint. This dataset is particularly useful for rebar picking practice, hyperbola interpretation, and GPR data analysis for reinforced concrete inspection.", "description_fr": "Set de données GPR composé de 7 fichiers acquis sur une dalle en béton armé. Les données mettent en évidence les armatures et un joint de dilatation. Un jeu de données particulièrement adapté à l’apprentissage du pointé des armatures, à l’interprétation des hyperboles et à l’analyse de données radar appliquée au diagnostic des structures en béton.", "applications": [ "beton" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "FLEX NX", "frequency_mhz": "2500", "format": "DZT", "dataType": "raw", "fileCount": 7, "targets": [ "rebar", "expansion joint" ], "contributor": "ISBA TP", "datePublished": "2026-08-12", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 2, "gpsAvailable": false, "groundTruth": "verified", "groundTruthMethod": null, "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds016-reinforced-concrete-slab-with-expansion-joint/", "url_fr": "https://www.gprbase.com/dataset/ds016-dalle-en-beton-arme-avec-joint-de-dilatation/", "publisher": "GPRbase" }, { "id": "ds017", "title": "Utilities & Interfaces in Favorable Soil with Deep GPR Penetration", "title_fr": "Réseaux & interfaces dans un sol favorable à grande profondeur de pénétration", "description": "GPR dataset containing 1 file collected with a GSSI UtilityScan DF dual-frequency 300/800 MHz ground penetrating radar in highly favorable soil conditions, providing excellent radar-wave propagation and deep GPR penetration.\n\nThe radargram reveals multiple underground utilities, interfaces, soil layers, and changes in subsurface materials. This dataset is ideal for GPR interpretation training with GPRviewer, particularly for practicing interface and layer picking, thickness measurements, and subsurface layer analysis.", "description_fr": "Dataset GPR composé de 1 fichier acquis avec un géoradar GSSI UtilityScan DF bi-fréquence 300/800 MHz, dans un sol particulièrement favorable à la propagation des ondes radar, permettant une grande profondeur de pénétration.\n\nLe radargramme révèle de nombreux réseaux enterrés, interfaces, couches et changements de sols. Ce jeu de données est idéal pour l’apprentissage de l’interprétation GPR avec GPRviewer, notamment pour s’entraîner au pointé des interfaces, à la mesure des épaisseurs et à l’analyse des différentes couches du sous-sol.", "applications": [ "reseaux", "geosciences" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "UtilityScan DF", "frequency_mhz": "300/800", "format": "DZT", "dataType": "raw", "fileCount": 1, "targets": [ "buried utilities", "soil interfaces", "deep penetration" ], "contributor": "ISBA TP", "datePublished": "2026-08-12", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 2, "gpsAvailable": false, "groundTruth": "verified", "groundTruthMethod": null, "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds017-utilities-interfaces-in-favorable-soil-with-deep-gpr/", "url_fr": "https://www.gprbase.com/dataset/ds017-reseaux-interfaces-dans-un-sol-favorable-a-grande/", "publisher": "GPRbase" }, { "id": "ds018", "title": "Confirmed Karst Cavities in Limestone — 300 MHz GPR Profiles to 4 m Depth", "title_fr": "Cavités karstiques avérées en terrain calcaire — Profils géoradar 300 MHz jusqu'à 4 m", "description": "Raw GPR profiles acquired over limestone containing confirmed karst cavities, using a GSSI UtilityScan DF dual-frequency antenna. The 300 MHz channel is the useful one here: it delivers a clear signal down to 3.5–4 m and images the dissolution voids together with the bedrock interface. The simultaneously recorded 800 MHz channel covers the shallow weathered zone and lets you compare both frequencies over the same targets.\n\nThis dataset provides an interpretation reference that synthetic or unvalidated data cannot offer. Unprocessed .DZT files, suitable for karst interpretation training, void-detection algorithm testing, and frequency comparison.", "description_fr": "Profils géoradar bruts acquis sur terrain calcaire présentant des cavités karstiques avérées, avec une antenne bi-fréquence GSSI UtilityScan DF. Le canal 300 MHz est celui qui présente l'intérêt ici : il fournit un signal exploitable jusqu'à 3,5–4 m et image les vides de dissolution ainsi que le toit du substratum. Le canal 800 MHz, enregistré simultanément, couvre la zone d'altération superficielle et permet de comparer les deux fréquences sur les mêmes cibles.\n\nCe dataset constitue une référence d'interprétation que les données synthétiques ou non validées ne peuvent fournir. Fichiers .DZT non traités, adaptés à la formation à l'interprétation du karst, au test d'algorithmes de détection de vides et à la comparaison de fréquences.", "applications": [ "geotech", "geosciences" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "UtilityScan DF", "frequency_mhz": "300/800", "format": "DZT", "dataType": "raw", "fileCount": 4, "targets": [ "karst cavities", "dissolution voids", "bedrock interface" ], "contributor": "MDSLab", "datePublished": "2026-08-13", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 2, "gpsAvailable": false, "groundTruth": "verified", "groundTruthMethod": "Bibliography, Geotechnical investigation results", "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds018-confirmed-karst-cavities-in-limestone-300-mhz-gpr-profiles/", "url_fr": "https://www.gprbase.com/dataset/ds018-cavites-karstiques-averees-en-terrain-calcaire-profils/", "publisher": "GPRbase" }, { "id": "ds021", "title": "3D Grid on Reinforced Concrete — Rebar Mesh and Diagonal Electrical Cable", "title_fr": "Grille 3D sur béton armé — Ferraillage et câble électrique en diagonale", "description": "3D grid acquired on a reinforced concrete slab with a GSSI StructureScan XT 2.7 GHz antenna: 38 profiles over a 1.2 × 0.6 m area. The horizontal time slices reveal the reinforcement mesh and an electrical cable crossing the surveyed area diagonally.\n\nThe diagonal cable is what makes this dataset instructive: on a single 2D profile it produces a hyperbola indistinguishable from a rebar. Only the 3D reconstruction shows that it cuts across the mesh at an angle — the situation that leads to accidental strikes when drilling is planned from 2D scans alone.\n\nRaw unprocessed files, suitable for training on 3D grid interpretation, time-slice reading, and distinguishing embedded services from reinforcement.", "description_fr": "Grille 3D acquise sur une dalle en béton armé avec une antenne GSSI StructureScan XT 2,7 GHz : 38 profils sur une zone de 1,2 × 0,6 m. Les coupes horizontales font apparaître le treillis d'armatures et un câble électrique traversant la zone en diagonale.\n\nCe câble en biais fait tout l'intérêt du dataset : sur un profil 2D isolé, il produit une hyperbole impossible à distinguer d'une armature. Seule la reconstruction 3D révèle qu'il recoupe le ferraillage selon un angle — précisément la configuration à l'origine des percements accidentels lorsque le repérage s'appuie sur des profils 2D seuls.\n\nFichiers bruts non traités, adaptés à la formation à l'interprétation de grilles 3D, à la lecture de coupes temporelles et à la distinction entre réseaux noyés et armatures.", "applications": [ "beton", "reseaux" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "StructureScan Mini XT/LXT", "frequency_mhz": "2700", "format": "DZT", "dataType": "raw", "fileCount": 38, "targets": [ "rebar mesh", "electrical cable", "embedded service" ], "contributor": "MDSLab", "datePublished": "2026-08-17", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 1, "gpsAvailable": false, "groundTruth": "partial", "groundTruthMethod": "Electromagnetic (EM) detection", "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds021-3d-grid-on-reinforced-concrete-rebar-mesh-and-diagonal/", "url_fr": "https://www.gprbase.com/dataset/ds021-grille-3d-sur-beton-arme-ferraillage-et-cable-electrique-en/", "publisher": "GPRbase" }, { "id": "ds022", "title": "3D Grid on Reinforced Concrete — Welded Mesh Overlap for Rebar Picking", "title_fr": "Grille 3D sur béton armé — Recouvrement de treillis soudés pour le pointé d'armatures", "description": "3D grid acquired on a reinforced concrete slab with a GSSI NX25 stepped-frequency antenna, over a 1.2 × 0.6 m area. The slab contains two layers of welded wire mesh with an overlap zone, where the reinforcement density locally doubles.\n\nThat overlap is what makes the dataset useful for training: manual picking remains straightforward on the regular part of the mesh, while the lap zone produces closely spaced, partly merged hyperbolas — exactly the configuration where automatic detection tends to miss bars or merge them. Comparing manual and automatic picking in GPRviewer on the same grid shows where each approach reaches its limits.\n\nRaw unprocessed files, suitable for rebar picking practice, cover measurement, and benchmarking automatic detection algorithms.", "description_fr": "Grille 3D acquise sur une dalle en béton armé avec une antenne GSSI NX25 à saut de fréquence, sur une zone de 1,2 × 0,6 m. La dalle comporte deux nappes de treillis soudé avec une zone de recouvrement, où la densité d'armatures double localement.\n\nC'est ce recouvrement qui fait l'intérêt pédagogique du dataset : le pointé manuel reste simple sur la partie courante du treillis, tandis que la zone de recouvrement produit des hyperboles rapprochées et partiellement fusionnées — précisément la configuration où la détection automatique manque des barres ou les confond. Comparer pointé manuel et automatique dans GPRviewer sur une même grille montre où chaque approche atteint ses limites.\n\nFichiers bruts non traités, adaptés à l'entraînement au pointé d'armatures, à la mesure d'enrobage et à l'évaluation d'algorithmes de détection automatique.", "applications": [ "beton" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "NX25", "frequency_mhz": "2500", "format": "DZT", "dataType": "raw", "fileCount": 38, "targets": [ "welded mesh", "overlap zone", "concrete cover" ], "contributor": "MDSLab", "datePublished": "2026-08-17", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 1, "gpsAvailable": false, "groundTruth": "partial", "groundTruthMethod": null, "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds022-3d-grid-on-reinforced-concrete-welded-mesh-overlap-for/", "url_fr": "https://www.gprbase.com/dataset/ds022-grille-3d-sur-beton-arme-recouvrement-de-treillis-soudes/", "publisher": "GPRbase" }, { "id": "ds023", "title": "3D Grid on Densely Reinforced Concrete — Rebar Picking and C-Scan Tuning", "title_fr": "Grille 3D sur béton fortement ferraillé — Pointé d'armatures et réglage de la vue C-scan", "description": "3D grid acquired on a densely reinforced concrete structure with a GSSI StructureScan XT 2.7 GHz antenna, over a 60 × 60 cm area. The high bar density produces overlapping reflections across the whole grid, with no easy zone to fall back on.\n\nThis is what makes it a good training dataset. Picking bars one by one demands care, and the C-scan view is almost unreadable at default settings: the time slice must be adjusted, along with gain and colour range, before the mesh geometry becomes visible.\n\nWorking through those parameters in GPRviewer teaches more about C-scan reading than a clean, easy grid ever could.Raw unprocessed files, suitable for rebar picking practice, C-scan parameter training, and testing detection algorithms under demanding conditions.", "description_fr": "Grille 3D acquise sur un ouvrage en béton armé fortement ferraillé avec une antenne GSSI StructureScan XT 2,7 GHz, sur une zone de 60 × 60 cm. La densité d'armatures produit des réflexions qui se recouvrent sur toute la grille, sans zone facile où se replier.\n\nC'est précisément ce qui en fait un bon support de formation. Le pointé barre par barre demande de la rigueur, et la vue C-scan est presque illisible avec les réglages par défaut : il faut ajuster la profondeur de coupe, le gain et la plage de couleurs avant que la géométrie du treillis n'apparaisse. Travailler ces paramètres dans GPRviewer enseigne davantage sur la lecture des C-scans qu'une grille propre et facile.\n\nFichiers bruts non traités, adaptés à l'entraînement au pointé d'armatures, à l'apprentissage du réglage des C-scans et au test d'algorithmes de détection en conditions exigeantes.", "applications": [ "beton" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "StructureScan Mini XT/LXT", "frequency_mhz": "2700", "format": "DZT", "dataType": "raw", "fileCount": 26, "targets": [ "dense reinforcement", "rebar mesh" ], "contributor": "MDSLab", "datePublished": "2026-08-13", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 1, "gpsAvailable": false, "groundTruth": "partial", "groundTruthMethod": null, "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds023-3d-grid-on-densely-reinforced-concrete-rebar-picking-and-c/", "url_fr": "https://www.gprbase.com/dataset/ds023-grille-3d-sur-beton-fortement-ferraille-pointe-d-armatures/", "publisher": "GPRbase" }, { "id": "ds024", "title": "Unrecorded Utility Crossing Under a Street — Parallel GPR Profiles at 350 MHz", "title_fr": "Croisement de réseaux non répertoriés sous voirie — Profils géoradar 350 MHz", "description": "Utility survey on a street, acquired with a GSSI UtilityScan 350 MHz HyperStacking antenna: 9 parallel profiles spaced 1 m apart, crossing the alignment of a planned trench.\n\nThe survey revealed utilities that do not appear on the record drawings, crossing the street diagonally right where the trench was to be dug. The dataset also shows shallow changes in the road structure — surface layer variations and backfill from earlier works — which produce reflections easily confused with utilities by an untrained eye.\n\nThis combination makes it a realistic training case for utility detection before excavation: locating the crossings, following them from one profile to the next, and telling buried services apart from ground structure. Raw unprocessed files.", "description_fr": "Détection de réseaux sous voirie, acquise avec une antenne GSSI UtilityScan 350 MHz HyperStacking : 9 profils parallèles espacés de 1 m, recoupant l'implantation d'une tranchée projetée.\n\nL'investigation a mis en évidence des réseaux ne figurant pas sur les plans de récolement, traversant la rue en diagonale à l'endroit même du futur terrassement. Le dataset montre également des variations de la structure de chaussée en subsurface — changements de couche et remblais d'anciens travaux — qui produisent des réflexions facilement confondues avec des réseaux par un œil peu exercé.\n\nCette combinaison en fait un cas de formation réaliste pour la détection avant terrassement : localiser les traversées, les suivre d'un profil à l'autre, et distinguer les réseaux enterrés de la structure du sol. Fichiers bruts non traités.", "applications": [ "reseaux" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "UtilityScan 350 MHz", "frequency_mhz": "350 MHz", "format": "DZT", "dataType": "raw", "fileCount": 9, "targets": [ "unrecorded utilities", "road structure" ], "contributor": "MDSLab", "datePublished": "2026-08-13", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 1, "gpsAvailable": false, "groundTruth": "verified", "groundTruthMethod": "Electromagnetic (EM) detection, Trench Work", "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds024-unrecorded-utility-crossing-under-a-street-parallel-gpr/", "url_fr": "https://www.gprbase.com/dataset/ds024-croisement-de-reseaux-non-repertories-sous-voirie-profils/", "publisher": "GPRbase" }, { "id": "ds025", "title": "Masonry Vaults in a Historic Monument - Ground penetrating radar - 2 profiles", "title_fr": "Voûtes en maçonnerie dans un monument historique détectées par un radar de sol double fréquence", "description": "GPR survey inside a historic monument, acquired with a GSSI UtilityScan DF dual-frequency antenna to locate masonry vaults and characterise the structure above them. Two profiles.\n\nHistoric masonry is a difficult subject for GPR: unlike reinforced concrete, it has no regular reinforcement to give clear reflections, and the fill above a vault is heterogeneous — rubble, mortar, voids, later alterations. The vault extrados appears as a curved reflection that must be traced among the reflections of the fill itself.\n\nA realistic case for training in non-destructive diagnosis of heritage buildings, where coring and probing are rarely permitted. Raw unprocessed files.", "description_fr": "Investigation géoradar dans un monument historique, acquise avec une antenne bi-fréquence GSSI UtilityScan DF pour localiser des voûtes en maçonnerie et caractériser la structure. Deux profils.\n\nLa maçonnerie ancienne est un sujet difficile pour le géoradar : contrairement au béton armé, elle ne comporte pas d'armatures régulières donnant des réflexions nettes, et le remplissage au-dessus d'une voûte est hétérogène — blocage, mortier, vides, reprises successives. L'extrados de la voûte apparaît comme une réflexion incurvée qu'il faut distinguer parmi les réflexions du remplissage lui-même.\n\nUn cas réaliste de formation au diagnostic non destructif du bâti ancien, où le carottage et le sondage sont rarement autorisés. Fichiers bruts non traités.", "applications": [ "archeologie" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "UtilityScan DF", "frequency_mhz": "300/800", "format": "DZT", "dataType": "raw", "fileCount": 2, "targets": [ "masonry vault", "vault extrados", "heterogeneous fill" ], "contributor": "MDSLab", "datePublished": "2026-08-13", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 2, "gpsAvailable": false, "groundTruth": "partial", "groundTruthMethod": null, "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds025-masonry-vaults-in-a-historic-monument-ground-penetrating/", "url_fr": "https://www.gprbase.com/dataset/ds025-voutes-en-maconnerie-dans-un-monument-historique-detectees/", "publisher": "GPRbase" }, { "id": "ds026", "title": "Georeferenced Multi-Utility Mapping - 30 RTK GPR Profiles at 300/800 MHz", "title_fr": "Cartographie multi-réseaux en classe A— Couplage GPR & GPS RTK - UtilityScan DF", "description": "Multi-utility GPR survey acquired for cartographic updating ahead of planned works, with a GSSI UtilityScan DF dual-frequency antenna. 30 profiles, each georeferenced with RTK GPS: raw .DZT radar data, .DZX configuration and .DZG positioning files.\n\nThe positioning is what sets this dataset apart. Most freely available GPR data has no coordinates, which limits it to signal interpretation. Here, every trace carries a position, so the detected utilities can be plotted directly, exported to a GIS and compared with record drawings — the full workflow of a mapping campaign, not just a radargram.\n\nUseful for training in georeferenced utility mapping, for testing DZG parsing and coordinate handling in software, and for research on the integration of GPR results into geographic databases. Raw unprocessed files.", "description_fr": "Détection multi-réseaux réalisée pour la mise à jour cartographique avant projet de travaux, avec une antenne bi-fréquence GSSI UtilityScan DF. 30 profils, chacun géoréférencé au GPS RTK : données radar brutes .DZT, configuration .DZX et positionnement .DZG.\n\nC'est le géoréférencement qui distingue ce dataset. La plupart des données GPR librement accessibles sont dépourvues de coordonnées, ce qui les cantonne à l'interprétation du signal. Ici, chaque trace porte une position : les réseaux détectés peuvent être reportés directement, exportés vers un SIG et confrontés aux plans de récolement — la chaîne complète d'une campagne de cartographie, et non un simple radargramme.\n\nAdapté à la formation à la cartographie géoréférencée de réseaux, au test de la lecture des fichiers DZG et de la gestion des coordonnées dans les logiciels, et à la recherche sur l'intégration des résultats GPR dans les bases de données géographiques. Fichiers bruts non traités.", "applications": [ "reseaux" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "UtilityScan DF", "frequency_mhz": "300/800", "format": "DZT", "dataType": "raw", "fileCount": 30, "targets": [ "buried utilities", "RTK positioning", "georeferencing" ], "contributor": "MDSLab", "datePublished": "2026-08-13", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 2, "gpsAvailable": true, "groundTruth": "verified", "groundTruthMethod": "Maps, Manhole Covers", "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds026-georeferenced-multi-utility-mapping-30-rtk-gpr-profiles-at/", "url_fr": "https://www.gprbase.com/dataset/ds026-cartographie-multi-reseaux-en-classe-a-couplage-gpr-gps-rtk/", "publisher": "GPRbase" }, { "id": "ds027", "title": "Rib Vault GPR Survey from Above — Backfill Thickness and Structural Geometry", "title_fr": "Auscultation radar de voûte sur croisée d'ogives — Remblai et géométrie structurelle", "description": "GPR profiles acquired from above a rib vault in a cathedral, with a GSSI UtilityScan DF dual-frequency antenna. Three profiles crossing the vault, recorded from the extrados side to measure the thickness of the backfill covering it. Raw unprocessed files.\n\nThe vault reads as a curved reflection whose depth varies continuously along the profile: shallow at the crown, deeper towards the springing. The points where that curve begins and ends mark the extent of the vault — the information a structural survey needs before locating loads, planning an intervention or assessing the fill above.", "description_fr": "Profils géoradar acquis au-dessus d'une voûte sur croisée d'ogives dans une cathédrale, avec une antenne bi-fréquence GSSI UtilityScan DF. Trois profils recoupant la voûte, mesurés depuis l'extrados pour déterminer l'épaisseur du remblai qui la recouvre. Fichiers bruts non traités.\n\nLa voûte se lit comme une réflexion incurvée dont la profondeur varie continûment le long du profil : faible à la clé, plus importante vers les naissances. Les points où cette courbe commence et s'achève marquent l'emprise de la voûte — l'information que recherche une reconnaissance de structure avant de localiser des charges, de planifier une intervention ou d'évaluer le remblai supérieur.", "applications": [ "archeologie" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "UtilityScan DF", "frequency_mhz": "300/800", "format": "DZT", "dataType": "raw", "fileCount": 3, "targets": [ "rib vault", "vault extrados", "backfill" ], "contributor": "MDSLab", "datePublished": "2026-08-13", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 2, "gpsAvailable": false, "groundTruth": "partial", "groundTruthMethod": null, "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds027-rib-vault-gpr-survey-from-above-backfill-thickness-and/", "url_fr": "https://www.gprbase.com/dataset/ds027-auscultation-radar-de-voute-sur-croisee-d-ogives-remblai-et/", "publisher": "GPRbase" }, { "id": "ds028", "title": "Multiple Utilities and Airwave — Distinguishing Surface Reflections from Buried Targets", "title_fr": "Réseaux multiples et onde aérienne — Distinguer les réflexions de surface des cibles enterrées", "description": "Utility survey acquired with a GSSI UtilityScan DF dual-frequency antenna, showing several buried utilities together with a clear airwave signature.\n\nThe airwave is what makes this dataset worth studying. Part of the emitted energy travels through the air rather than the ground, reflects off objects above the surface and returns as a hyperbola that looks like a buried target. Its velocity gives it away: propagation in air is faster than in most soils, so an airwave hyperbola is markedly wider and flatter than a true subsurface reflection at the same apparent depth.\n\nMistaking one for the other leads to phantom utilities on a plan. Having both on the same profile makes the comparison direct. Raw unprocessed files.", "description_fr": "Détection de réseaux acquise avec une antenne bi-fréquence GSSI UtilityScan DF, montrant plusieurs réseaux enterrés ainsi qu'une signature d'onde aérienne bien marquée.\n\nC'est l'onde aérienne qui fait l'intérêt de ce dataset. Une partie de l'énergie émise se propage dans l'air plutôt que dans le sol, se réfléchit sur un objet en surface et revient sous forme d'hyperbole ressemblant à une cible enterrée. Sa vitesse la trahit : la propagation dans l'air est plus rapide que dans lles sols, si bien qu'une hyperbole d'onde aérienne est nettement plus ouverte et plus plate qu'une véritable réflexion de subsurface à profondeur apparente égale.\n\nConfondre les deux conduit à reporter des réseaux fantômes sur un plan. Les avoir sur le même profil rend la comparaison immédiate. Fichiers bruts non traités.", "applications": [ "reseaux" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "UtilityScan DF", "frequency_mhz": "300/800", "format": "DZT", "dataType": "raw", "fileCount": 1, "targets": [ "buried utilities", "airwave" ], "contributor": "MDSLab", "datePublished": "2026-08-20", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 2, "gpsAvailable": false, "groundTruth": "partial", "groundTruthMethod": null, "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds028-multiple-utilities-and-airwave-distinguishing-surface/", "url_fr": "https://www.gprbase.com/dataset/ds028-reseaux-multiples-et-onde-aerienne-distinguer-les/", "publisher": "GPRbase" }, { "id": "ds029", "title": "Beam-and-Block Floor — Cross-Polarisation on Inline and Cross-Line Channels", "title_fr": "Plancher à poutrelles-hourdis: apport de la cross-polarisation, acquisition inline et cross-line", "description": "Radargram recorded on a beam-and-block floor with a GSSI FLEX NX stepped-frequency antenna, dual channel: one antenna oriented inline, the other cross-line. The profile was run perpendicular to the beams. The structure was verified by visual inspection from the soffit.\n\nA beam-and-block floor poses a specific difficulty: the beams are evenly spaced and their reinforcement runs in one direction only, while the infill blocks between them create voids and interfaces that clutter the section.\n\nWith the scan running perpendicular to the beams, the two channels do not see the same targets in the same way. One antenna is polarised parallel to the longitudinal steel, the other perpendicular to it, and the response of a bar depends strongly on that relative orientation. Comparing the two channels therefore reveals what neither shows alone: the beam pattern separates from the secondary reinforcement, and the boundary between beam and block becomes legible. The merge function in GPRviewer combines both channels and makes that contribution directly visible.\n\nRaw unprocessed files. Visual verification from the soffit gives the true floor geometry, which makes this dataset an interpretation reference rather than an illustration.", "description_fr": "Radargramme acquis sur un plancher à poutrelles-hourdis avec une antenne GSSI FLEX NX à saut de fréquence, en double voie : une antenne orientée inline, l'autre cross-line. Le profil a été relevé perpendiculairement aux poutrelles. La structure a été vérifiée par inspection visuelle en sous-face.\n\nUn plancher à poutrelles-hourdis pose une difficulté propre : les poutrelles sont régulièrement espacées et leurs armatures orientées dans une seule direction, tandis que les hourdis intercalés créent des vides et des interfaces qui brouillent la lecture.\n\nLe balayage étant perpendiculaire aux poutrelles, les deux voies ne voient pas la même chose des mêmes cibles. Une antenne est polarisée parallèlement aux aciers longitudinaux, l'autre perpendiculairement, et la réponse d'une armature dépend fortement de cette orientation relative. La comparaison des deux voies révèle donc ce qu'aucune ne montre seule : la trame des poutrelles se distingue des armatures secondaires, et la limite entre poutrelle et hourdis devient lisible. La fonction de fusion de GPRviewer permet de combiner les deux voies et d'apprécier directement cet apport.\n\nFichiers bruts non traités. La vérification visuelle en sous-face donne la géométrie réelle du plancher, ce qui fait de ce jeu une référence d'interprétation et non une simple illustration.", "applications": [ "beton" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "FLEX NX", "frequency_mhz": "2500", "format": "DZT", "dataType": "raw", "fileCount": 1, "targets": [ "beam-and-block floor", "precast beams", "infill blocks", "antenna polarisation" ], "contributor": "MDSLab", "datePublished": "2026-08-25", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 2, "gpsAvailable": false, "groundTruth": "verified", "groundTruthMethod": "visual", "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds029-beam-and-block-floor-cross-polarisation-on-inline-and-cross/", "url_fr": "https://www.gprbase.com/dataset/ds029-plancher-a-poutrelles-hourdis-apport-de-la-cross/", "publisher": "GPRbase" }, { "id": "ds030", "title": "Reinforced Concrete Column — Cross-Polarisation to Image the Far Face and Calibrate Permittivity", "title_fr": "Poteau en béton armé — Cross-polarisation pour imager la face opposée et caler la permittivité", "description": "Reinforced concrete column surveyed on all four faces, labelled A, B, C and D, by vertical scanning from bottom to top along the centre line of each face. Two configurations: a GSSI FLEX NX dual-channel antenna enabling cross-polarisation, inline and cross-line, then a single-channel NX25, both at 2.5 GHz. Eight files in total. The cross-section dimensions are known, distances A-C and B-D.\n\nWhat makes this dataset useful is what cross-polarisation reveals: the concrete-air interface at the far face. In a conventional acquisition that back-wall reflection is often masked by reinforcement echoes and by attenuation. Under crossed polarisation the response from the steel weakens while the response from a planar interface persists, and the far face emerges.\n\nThat reflection has direct metrological value. The column width can be measured on site with a tape, so a known thickness (14,17 in) is paired with a measured two-way travel time. The ratio of the two gives the propagation velocity in that particular concrete, and therefore its permittivity — rather than a tabulated value somewhere between 6 and 8 depending on the reference consulted.\n\nOnce that constant is calibrated, the depth scale of the radargram is correct, and so is any cover measured on the stirrups. That is the difference between estimating cover and measuring it.\n\nThree comparisons are available: between the four faces, between the two FLEX channels to assess what cross-polarisation adds to the back-wall reading, and between the two antennas at equal frequency.\n\nRaw unprocessed files.", "description_fr": "Poteau en béton armé ausculté sur ses quatre faces, notées A, B, C et D, par balayage vertical de bas en haut au milieu de chaque face. Deux configurations : une antenne GSSI FLEX NX à double voie permettant la cross-polarisation, inline et cross-line, puis une antenne NX25 à voie unique, toutes deux à 2,5 GHz. Huit fichiers au total. Les dimensions de la section sont connues, distances A-C et B-D.\n\nL'intérêt de ce jeu tient à ce que la cross-polarisation rend visible : l'interface béton-air de la face opposée. Sur une acquisition classique, cette réflexion de fond est souvent masquée par les échos des armatures et par l'atténuation. En polarisation croisée, la réponse des aciers diminue tandis que celle de l'interface plane subsiste, et le retour de la face arrière se dégage.\n\nCette réflexion a une valeur métrologique directe. La largeur du poteau étant mesurable in situ au mètre, on dispose d'une épaisseur connue (36 cm) associée à un temps de trajet mesuré. Le rapport des deux donne la vitesse de propagation dans ce béton précis, donc sa permittivité — plutôt qu'une valeur tabulée comprise entre 6 et 8 selon les ouvrages.\n\nUne fois cette constante calée, l'échelle de profondeur du radargramme est juste, et les enrobages mesurés sur les cadres le sont aussi. C'est la différence entre une estimation d'enrobage et une mesure.\n\nTrois comparaisons sont possibles : entre les quatre faces, entre les deux voies du FLEX pour apprécier ce que la cross-polarisation apporte à la lecture du fond, et entre les deux antennes à fréquence égale.\n\nFichiers bruts non traités.", "applications": [ "beton" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "FLEX NX;NX25", "frequency_mhz": "2500", "format": "DZT", "dataType": "raw", "fileCount": 8, "targets": [ "concrete column", "back-wall reflection", "stirrups", "permittivity calibration" ], "contributor": "MDSLab", "datePublished": "2026-08-26", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 2, "gpsAvailable": false, "groundTruth": "verified", "groundTruthMethod": "Measured column width 14,17 in / 36 cm", "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds030-reinforced-concrete-column-cross-polarisation-to-image-the/", "url_fr": "https://www.gprbase.com/dataset/ds030-poteau-en-beton-arme-cross-polarisation-pour-imager-la-face/", "publisher": "GPRbase" }, { "id": "ds031", "title": "Circular Reinforced Concrete Column : Perimeter Scan and Rebar Repositioning in Section View", "title_fr": "Poteau circulaire en béton armé : Balayage du pourtour et repositionnement des armatures en section", "description": "Circular reinforced concrete column, 20 cm radius, surveyed by horizontal scanning around its full perimeter with a GSSI FLEX NX dual-channel antenna, inline and cross-line. One file. The circumference was measured on site with a tape.\n\nA circular column poses a problem that flat surfaces do not. A radargram assumes a flat surface and plots depth perpendicular to a straight line. Here the distance axis is an arc, and the perpendiculars to the surface converge towards the column axis.\n\nThe section view in GPRviewer corrects exactly this: given the radius, it places each picked bar at its true geometric position within the cross-section, and the reinforcement cage recovers its circular shape.\n\nThe measured circumference provides a direct check: the radius follows from it, and the profile length should match one full turn of the column. A discrepancy reveals a survey-wheel calibration error before interpretation even begins.\n\nRaw unprocessed files.", "description_fr": "Poteau circulaire en béton armé de 20 cm de rayon, ausculté par balayage horizontal sur tout son pourtour avec une antenne GSSI FLEX NX à double voie, inline et cross-line. Un fichier. La circonférence a été mesurée au mètre ruban sur site.\n\nUn poteau circulaire pose un problème que les surfaces planes ne posent pas. Le radargramme suppose une surface plane et reporte les profondeurs perpendiculairement à une ligne droite. Or ici l'axe des distances est un arc, et les perpendiculaires à la surface convergent vers l'axe du poteau.\n\nC'est ce que corrige la vue en section de GPRviewer : connaissant le rayon, elle replace chaque armature pointée à sa position géométrique réelle dans la section, et la cage d'armatures reprend sa forme circulaire.\n\nLa circonférence mesurée fournit une vérification directe : le rayon s'en déduit, et la longueur du profil doit correspondre au tour complet du poteau. Un écart signale une erreur d'étalonnage de la roue codeuse avant même de commencer l'interprétation.\n\nFichiers bruts non traités.", "applications": [ "beton" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "FLEX NX", "frequency_mhz": "2500", "format": "DZT", "dataType": "raw", "fileCount": 1, "targets": [ "circular column", "longitudinal bars", "hoops", "column cross-section" ], "contributor": "MDSLab", "datePublished": "2026-08-27", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 2, "gpsAvailable": false, "groundTruth": "verified", "groundTruthMethod": "measured column circumference (tape measure)", "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds031-circular-reinforced-concrete-column-perimeter-scan-and/", "url_fr": "https://www.gprbase.com/dataset/ds031-poteau-circulaire-en-beton-arme-balayage-du-pourtour-et/", "publisher": "GPRbase" }, { "id": "ds032", "title": "Reinforced Concrete Beam: Continuous Longitudinal GPR Survey with Markers at Two Columns", "title_fr": "Poutre en béton armé : auscultation radar longitudinale continue avec repères au droit de deux poteaux", "description": "Reinforced concrete beam, 35 cm thick, surveyed continuously over more than 9 metres with a GSSI FLEX NX antenna. Two user markers were placed during acquisition, at the supporting columns.\n\nThe markers act as anchors. They locate the supports on the section and allow the picking to be tied to the real geometry of the structure — clear span between columns, critical shear zones, position of construction joints.\n\nThe measured 35 cm thickness allows the propagation velocity to be calibrated against a known dimension.\n\nRaw unprocessed files.", "description_fr": "Poutre en béton armé de 35 cm d'épaisseur, auscultée en continu sur plus de 9 mètres avec une antenne GSSI FLEX NX. Deux repères utilisateur ont été posés pendant l'acquisition, au droit des poteaux porteurs.\n\nLes repères servent d'ancrage. Ils localisent les appuis sur la section et permettent de rattacher le pointé à la géométrie réelle de l'ouvrage — portée entre poteaux, zones critiques d'effort tranchant, position des reprises de bétonnage.\n\nL'épaisseur de 35 cm est mesurée et permet de caler la vitesse de propagation sur une épaisseur connue.\n\nFichiers bruts non traités.", "applications": [ "beton" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "FLEX NX", "frequency_mhz": "2500", "format": "DZT", "dataType": "raw", "fileCount": 1, "targets": [ "concrete beam", "stirrups", "supports", "beam thickness" ], "contributor": "MDSLab", "datePublished": "2026-08-27", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 2, "gpsAvailable": false, "groundTruth": "verified", "groundTruthMethod": "measured beam thickness and column positions", "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds032-reinforced-concrete-beam-continuous-longitudinal-gpr-survey/", "url_fr": "https://www.gprbase.com/dataset/ds032-poutre-en-beton-arme-auscultation-radar-longitudinale/", "publisher": "GPRbase" }, { "id": "ds033", "title": "T-Shaped Retaining Wall: Variable Thickness from a Vertical then Horizontal GPR Profile", "title_fr": "Mur de soutènement en T : épaisseur variable relevée au radar, profil vertical puis horizontal", "description": "T-shaped retaining wall surveyed with a GSSI FLEX NX antenna. A single profile, run first vertically up the stem, then horizontally, without interrupting the acquisition.\n\nThe concrete-air interface at the back face stands out clearly on the radargram. Its depth gives the stem thickness at any point, and the stem of a T-wall is not of constant thickness: it thickens towards the base to resist earth pressure. The back-wall reflector therefore forms an oblique line rather than one parallel to the surface.\n\nThe change of direction mid-profile produces a visible break in the section. Recognising it is part of the exercise: it is a reminder that the distance axis follows the antenna path, not the geometry of the structure.\n\nRaw unprocessed files.", "description_fr": "Mur de soutènement en T ausculté avec une antenne GSSI FLEX NX. Un seul profil, parcouru d'abord verticalement sur la hauteur du voile, puis horizontalement, sans interrompre l'acquisition.\n\nL'interface béton-air de la face arrière ressort nettement sur le radargramme. Sa profondeur donne l'épaisseur du voile en tout point, et le voile d'un mur en T n'a pas d'épaisseur constante : il s'épaissit vers la base pour reprendre la poussée des terres. Le réflecteur de fond dessine donc une oblique, et non une ligne parallèle à la surface.\n\nLe changement d'orientation en cours de profil crée une rupture visible dans la section. La reconnaître fait partie de l'exercice : elle rappelle que l'axe des distances suit le trajet de l'antenne, pas la géométrie de l'ouvrage.\n\nFichiers bruts non traités.", "applications": [ "beton" ], "measurementTechnique": "Ground Penetrating Radar", "manufacturer": "GSSI", "antenna": "FLEX NX", "frequency_mhz": "2500", "format": "DZT", "dataType": "raw", "fileCount": 1, "targets": [ "retaining wall", "back-wall reflection", "variable thickness", "wall stem" ], "contributor": "MDSLab", "datePublished": "2026-08-27", "license": "https://creativecommons.org/licenses/by-nc-sa/4.0/", "status": "public", "channels": 2, "gpsAvailable": false, "groundTruth": "partial", "groundTruthMethod": null, "isAccessibleForFree": true, "isAccessibleForPro": false, "url": "https://www.gprbase.com/en/dataset/ds033-t-shaped-retaining-wall-variable-thickness-from-a-vertical/", "url_fr": "https://www.gprbase.com/dataset/ds033-mur-de-soutenement-en-t-epaisseur-variable-relevee-au-radar/", "publisher": "GPRbase" } ] }