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Free GPR data

To learn how to read a radargram, test a processing step or compare antennas, nothing beats real measurements. GPRbase, the open database by MDS, publishes real, documented and free ground penetrating radar surveys that open directly in GPRviewer.

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Each dataset is described on GPRbase (context, equipment, targets, ground truth when available) and can be downloaded for free. In GPRviewer, the “Samples on GPRbase.com” button on the start screen opens the same catalogue.

How to use them

Pick a dataset below and download it from GPRbase (ZIP archive).
Open GPRviewer and drop the .DZT files onto the window.
Compare with the dataset description: rebars, utilities, voids or interfaces are identified there.

GPR dataset opened in GPRviewer with detections

Concrete and structures 20

3D Grid Concrete bloc wall with voids GSSI FLEX NX · 2500 MHz · ds001
FLEX, NX25 and NX15 reference lines (MDSLab) GSSI FLEX NX, NX25, NX15 · 2500, 1500 MHz · ds003
Double layer of reinforcement and structural change (1 profile) GSSI StructureScan Mini XT/LXT · 2700 MHz · ds004
Double mesh tightly embedded in a concrete slab with varying concrete cover GSSI StructureScan LT · 1600 MHz · ds005
FLEX 3D grid 60 x 60 cm (reinforced concrete beam and slab). GSSI FLEX NX · 2500 MHz · ds006
Two layers of rebars in a reinforced concrete structure (3D grid) GSSI StructureScan Mini XT/LXT · 2700 MHz · ds009
3D concrete scanning over a slab-access ramp interface GSSI StructureScan Mini XT/LXT · 2700 MHz · ds012
Voids in a concrete block wall GSSI FLEX NX · 2500 MHz · ds014
Thickness detection above three masonry bridge arches GSSI UtilityScan DF · 300/800 MHz · ds015
Reinforced Concrete Slab with Expansion Joint GSSI FLEX NX · 2500 MHz · ds016
3D Grid on Reinforced Concrete — Welded Mesh Overlap for Rebar Picking GSSI NX25 · 2500 MHz · ds022
3D Grid on Densely Reinforced Concrete — Rebar Picking and C-Scan Tuning GSSI StructureScan Mini XT/LXT · 2700 MHz · ds023
Beam-and-Block Floor — Cross-Polarisation on Inline and Cross-Line Channels GSSI FLEX NX · 2500 MHz · ds029
Reinforced Concrete Column — Cross-Polarisation to Image the Far Face and Calibrate Permittivity GSSI FLEX NX, NX25 · 2500 MHz · ds030
Circular Reinforced Concrete Column : Perimeter Scan and Rebar Repositioning in Section View GSSI FLEX NX · 2500 MHz · ds031
Reinforced Concrete Beam: Continuous Longitudinal GPR Survey with Markers at Two Columns GSSI FLEX NX · 2500 MHz · ds032
T-Shaped Retaining Wall: Variable Thickness from a Vertical then Horizontal GPR Profile GSSI FLEX NX · 2500 MHz · ds033
Reinforced Concrete Accessibility Ramp: Three Frequencies, Two 2.5 GHz Antennas and Cross-Polarisation on the Same Profile GSSI FLEX NX, NX25, UtilityScan DF · 300 à 2500 MHz · ds034
Formwork block Wall: 3D Grid Over a Void, 24 Crossing Profiles GSSI FLEX NX · 2500 MHz · ds038
Pier shaft of a Toulouse Metro Line C viaduct with step-frequency GPR GSSI FLEX NX · 2500 MHz · ds039

Buried utilities 7

Detection of various buried utilities using a dual-frequency antenna (300 MHz and 800 MHz) GSSI UtilityScan DF · 300/800 MHz · ds008
Ground-penetrating radar detection of gas connections (HDPE polyethylene) GSSI UtilityScan DF · 300/800 MHz · ds011
Detection of buried pipes with the NX15 step-frequency ground-penetrating radar antenna GSSI NX15 · 1500 MHz · ds013
Unrecorded Utility Crossing Under a Street — Parallel GPR Profiles at 350 MHz GSSI UtilityScan · 350 MHz · ds024
Georeferenced Multi-Utility Mapping - 30 RTK GPR Profiles at 300/800 MHz GSSI UtilityScan DF · 300/800 MHz · ds026
Multiple Utilities and Airwave — Distinguishing Surface Reflections from Buried Targets GSSI UtilityScan DF · 300/800 MHz · ds028
Buried utility crossing and two metal manhole covers — dual-frequency Compass NX profile (.nx) GSSI Compass NX · 400/1000 MHz · ds040

Geotechnics and pavements 1

Detection of a backfilled marl pit beneath a road GSSI UtilityScan DF · 300/800 MHz · ds007

Heritage and archaeology 2

Masonry Vaults in a Historic Monument - Ground penetrating radar - 2 profiles GSSI UtilityScan DF · 300/800 MHz · ds025
Rib Vault GPR Survey from Above — Backfill Thickness and Structural Geometry GSSI UtilityScan DF · 300/800 MHz · ds027

geotech,geosciences 2

Georeferenced dual-frequency ground-penetrating radar (GPR RTK) files GSSI UtilityScan DF · 300/800 MHz · ds002
Confirmed Karst Cavities in Limestone — 300 MHz GPR Profiles to 4 m Depth GSSI UtilityScan DF · 300/800 MHz · ds018

geotech,routes 1

Highway pavement inspection along an emergency stopping lane (ESL) GSSI UtilityScan DF · 300/800 MHz · ds010

reseaux,geosciences 1

Utilities & Interfaces in Favorable Soil with Deep GPR Penetration GSSI UtilityScan DF · 300/800 MHz · ds017

beton,reseaux 1

3D Grid on Reinforced Concrete — Rebar Mesh and Diagonal Electrical Cable GSSI StructureScan Mini XT/LXT · 2700 MHz · ds021

geotech,beton,reseaux 1

Industrial Slab GPR Survey: Heterogeneous Reinforcement and Subgrade, Inputs for Bearing Capacity Assessment GSSI UtilityScan DF · 300/800 MHz · ds035

reseaux,beton 1

Buried Utilities Beneath a Reinforced Concrete Slab: Detection Through Dense Reinforcement GSSI UtilityScan DF · 300/800 MHz · ds036

beton,geotech 1

GPR Survey of a Car Park Raft Slab Showing Multiple Defects and Forms of Distress GSSI NX15 · 1500 MHz · ds037

Frequently asked questions

Where can I find free GPR data?

On GPRbase.com, which publishes real GSSI surveys with their context. They open for free in GPRviewer.

Can I use them for training or a publication?

Yes, under the licence stated on each dataset page.

Which formats?

Mostly GSSI .DZT files, sometimes with .DZX files, GPS tracks or Compass files (.nx).

See also

Open a DZT file · Free GPR software · Pro version · AI rebar picking API

Open GPRviewer for free