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GPR-SLICE imaging of post tension cables in concrete with rebar
GPR imagery of a frozen lakebed bottom reflection measured using a GPR drone system. The antenna is a Radarteam AB Sweden (www.radarteam.se) subecho 70MHz that can stack 32000 scans/second. The heavy duty drone system is manufactuered by SPH-Engineering in Latvia (www.sph-engineering.com). The lakebed is mapped detected in the GPR-SLICE Horizon menu and gridded to show ontop of a Goggle Earth map.
GPR-SLICE real time topography adjustments in OpenGL
GPR-SLICE provides for Google Earth KMZ time slice image output. In this Google Earth image, Kofun burial mounds located in Saitobaru, Miyazaki Japan are shown. Some of the strong reflections repressent intact subterranean burial chambers. (Data courtesy of Hongo Hiromichi and Higashi Noriaki, curator at the Saitobaru Archaeological Museum)
GPR-SLICE example of shaded color option for time slice displays to provide artificial relief
GPR-SLICE has new options to make vector imaging easy to orient a 3D radar survey made on the surface of any geometry. In this example surveying the walls inside a room can be easily set with a one button navigation operation.
GPR-SLICE new menu to do vector addition of local volumes into a vector volume. The new menu can synthesize a single vector volume for volumes taken on the surface of a square column. (data courtesy of Geomaster Corp, Philippines)
GPR-SLICE has options to generate solid pulse volumes for non multichannel users when a high profile density is used. Pulse imaging can have advantages over amplitude/envelope imaging for some sites and as shown in an example provided by Horsley Archaeological Prospection LLC, Illinois. In the example some faint ciricular features shown in pulse imaging illuminate a rampart from an Indian village - but not seen in typical envelop/amplitude imaging.
Recommended reading for beginners and advanced surveyors involved in GPR exploration http://www.amazon.com/Remote-Sensing-Archaeology-Geotechnologies-Environment/dp/3642318568
GPR-SLICE V7.0(1994-2018) is a comprehensive ground penetrating radar imaging software designed for creation of 2D/3D subsurface images for use in a variety of geotechnical, engineering and archaeological applications. GPR-SLICE began development in 1990 and became a full commercial software by 1994. The first Windows version of the software was released in 2001. The software is directly marketed by the Geophysical Archaeometry Laboratory Inc. and our affliated worldwide distributors.
GPR-SLICEis compatible with all the major manufacturers of GPR including:
Geophysical Survey Systems Inc
Mala Geoscience Sensors and Software
IDS US Radar
Ditch Witch ERA Technology 3D Radar of Norway UTSI Electronics Geoscanners
Leica Zond Radar
Loza SEGY and SEG 2 Plus customized formats for research radar systems
GPR-SLICEmulti-channel extended licenses include integration of: IDS Stream Italy Mala Mira Sweden 3D Radar Geoscope Norway
Koden Radar Japan
Impulse Radar Sweden
Radar Portal Australia
Terravision USA *** with complete integration of GPS and total station
GPR-SLICEapplies a unique process of radargram desampling/binning and then recreates GPR data volumes using estimation algorithmsfor single channel - coarsely spaced profile lines. For multi-channel dataset direct compilation to pulse 3D volumes can be quickly generated without interpolation because of the hi-density acquisition. GPR-SLICEhandles all surveyed data densities to make the most comprehensive subsurface imagery. Many researchers have migrated to the software because of the professional quality images that can be created in the software. GPR-SLICE software is designed to remove line noises and artifiacts that show profile directions and pixelation noises from incomplete sampling of the ground. GPR-SLICE images help interpreters extract hidden information contained in noisy radargrams which would otherwise be lost and never revealed within the raw data. Many options in GPR-SLICE set it apart from manufacturers imaging solutions. GPR-SLICE was the first commericial software in 2003 to release complete integration with GPS navigation, including GPR/GPS volume imaging and time slices. The software is completely integrated for GPS with all the major manufacturers of GPR. GPR-SLICE is also already integrated for Total Station navigation where the typical GPS NMEA string formats are used. GPR-SLICE was also the first software to provide for static corrections that account for the tilt of the antenna over sites with topography. GPR-SLICE has a unique overlay option, which provides for comprehensive subsurface maps that synthesizes structures located at different depth levels. Civil engineers that are surveyors of infrastructure can use features in GPR-SLICE to image tunnels and present 3D slices of tunnel or cylindrical volumes. With the addition of our built-in OpenGL 3D Modules GPR-SLICEOpen GL Volume,real time flythroughs, real time isosurface rendering, transparency and fences yield dynamic displays of GPR-SLICE data volumes. The GPR-SLICE includes built-in Open GL options for mixing of 3D time slice volumes, isosurfaces, horizon surfaces with raw or processed radargrams in the same graphic dialog. The latest release of GPR-SLICE has complete Vector navigation formats - random GPR tracks + the yaw, tilt and pitch of the antenna are all included in the most generalized navigation. Vector navigation is all inclusive of the navigation for regular surveys, GPS, total station navigated surveys, any navigated survey - but with the antenna orientation. What this means is that any survey of a GPR antenna in 3D space can be mapped and the radarscans projected into their proper location. GPR-SLICE v7.0 is the first commercial software to provide for vector imaging.
GPR-SLICE has been providing support in the software for 4D GPR monitoring. GPR monitoring is fastly becoming an important market in GPR surveying to reoccupy sites and to determine the differences in time that have occurred. GPR monitoring of runaways, railway systems, and other critical infrastructures are getting noticed by the engineering community. GPR time slice differencing since 2003 and recently volume differencing for 4D measurements have become available in 2015.
GPR-SLICE Software features:
2D/3D time slices
3D volume displays, Isosurface Rendering, Fence Plots
Antenna yaw, pitch and roll used in projecting scans
Longitudinal tunnel radar survey menu for automatic vector setting
Radial tunnel survey menu for automatic vector setting
Meandering track menu and automatic vector setting
Complete GPS Navigation Integration Including:
GPS 2D/3D Time Slices
GPS 2D/3D Radargram Displays
Specialized menu for editting/filtering GPS fallout
Batch GPS topography corrections
Builtin UTM utility conversion
Exportability to GIS (world file creation)
Direct export to Google Earth (*.kmz image file creation
Builtin GPS staggering/scan lag latency correction
Complete GPS integration
Open GL Graphics
2D surface displays and automatic animation creation
Open GL 3D real time flythroughs, x, y, z, xy fence diagrams, isosurface rendering
Open GL 3D radargram displays, with pulse thresholding and automatic animation creation
Open GL Object drawing for interpretation (pipes, rectangular volumes, spheres etc ) with DXF file creation
Cylinder volume warping for imaging tunnels
Exportable animation menu
Multi-threaded animation displays
Built-in macros for processing all the high frequency concrete scanning systems
Unique processes including Overlay Analysis
Split Screen Options: time slice to radargram anomaly comparison
Split Screen Options: radargram to time slice anomaly comparison
Static corrections for topography
Static corrections accounting for antenna tilt
Horizon Detection and Mapping
Automatic horizon detection
Layer depth maps using variable layer velocities
Horizon amplitude profiles and maps
Horizon slicing in Open GL 3D Volume
Customizable multi-time slice and radargram displays
Easy grid connection and appending
Specialized filters to automatically remove mosaic noises from multi-grid surveys
Time slice differencing for GPR montioring - 4D surveys
Radargram differencing for GPR monitoring - 4D surveys
Volume differencing for GPR monitoring - 4D survyes
FK Radargram filtering
0ns scan-by-scan or 0ns line-by-line offset auto detection/editing of radargrams menu
Migration with variable velocity profiles
Bandpass filtering and spectra menu
Fast Fourier Transform - 2D spatial frequency time slice filtering menu
Mosaic correction menu
2D FFT grid filtering
Individualized map transform controls
Radargram tunnel/cylinder warping
jpeg / bmp / dxf / kmz / jgw / bmw / png / pdf outputs
Importability and processing Magnetometer, Resistivity, EM data and any 2D/3D data.
Image synthesizing of GPR, Mag, Resistivity and EM using Overlay Analysis
The complete list of government agencies, universities, engineering/geotechnical companies and private organizations currently subscribing or maintaining purchased licenses toGPR-SLICE Software for Windows in 2017 is:
Saitobaru Archaeological Museum, Miyazaki, Japan
United States Forest Service, Louisiana
Nara National Research Institute for Cultural Properties, Nara, Japan
Dept of Civil Engineering, Unversity of Texas at Arlington
Historic Environment Scotland, United Kingdom
Ayed Eid Al Osaimi Geotechnic Co., Saudi Arabia
Metopolitan Police, United Kingdom
Busan Metropolitan City, Korea
Civil Engineering, University of Ositek, Croatia
GPR-SLICE volume imaging with GPS navigation: Mala Geoscience
GPR-SLICE Software - Fixing GPS Latency seen in GPR Time Slices : example from a GSSI SIR 4000 (data courtesy of Ryan North, US Army Corps of Engineers)
GPR-SLICE volume imaging with GPS navigation: Sensors and Softwares
GPR-SLICE volume imaging with GPS navigation: GSSI
GPR-SLICE concrete imaging using XY decoupled gridding:
The GPR-SLICE Grid menu has been enhanced with FFT-2D time slice filtering. In the example seen, plow scars or crop noise at about 45 degrees to the grid is seen. Fast Fourier Transforming the image in 2 dimensions, the spatial frequency components of the crop noise can be identified as linear features normal to the crop lines. By selectiively blanking out the desired spatial frequency components and doing an inverse FFt on the time slice grid, the crop noise can be effectively filtered. (Data courtesy of the British School at Rome).
New OpenGL XYZ-2D menu in GPR-SLICE allows the user to click on time slice anomalies and to instantenously see the X and Y volume cuts. IDS Stream multichannel was used during the workshop "GPR methods for Archaeology and Historical Buildings" and were collected in the Geophysical Test Site of ITABC National Research Area of CNR Roma1. The site was surveyed by Gianfranco Morelli of Geostudi and processed in GPR-SLICE with multichannel options. The software was recently enhanced to properly account for phase lag in GPS collection with this multichannel system to properly position all the individual channels.
GPR-SLICE v7.0 has a new bridgedeck module featuring an auto-hyperbola detection and mapping menu of recorded hyperbolas from bridgedecks or any subsurface structures with rebar or piping. The auto-detetction algorithm allows the user to adjust threshold settings to selectively detect only the desired hyperbolic features. An editting dialog allows the user to easily intervene and edit the detected features. Peak amplitude responses on the rebar hyperbola which are correlated with bridgedeck corrosion are gridded in the GPR-SLICE Grid menu.
The 2D Radar menu in GPR-SLICE lets the user display as many radargrams to the display dialog as they want. Anomaly picking on any radargram shown to the screen is also easily launched in the menu.
A recent image by Xpresa Geophysics shows utility mapping capabilities in GPR-SLICE. Data from an IDS Stream Multichannel system supporting 24 channels separated 6cm apart shows connected utilities across a street in Barcelona Spain. The data was processed by Miquel Coll using GPR-SLICE v7.0 with Multichannel Options. Interpretation was made directly in the OpenGL Volume Draw menu in the software with utilities placed direclty on top of 3D slices in a real time environment. The data were then exported to DXF in the software for import directly to AutoCAD.
GPR-SLICE v7.0 is now equipped for automatic detecting up to 8 layers and outputting these layers for 3D imaging in Open GL. These new features are useful for road evaluation surveys and geologic/stratigraphic mapping. In addition to the horizon surfaces and profiles detected, horizon amplitudes are outputted for use in horizon slice mapping. Road evaluation licenses also contain capabilities to calibrate layer dielectrics/velocities from layer reflections using metal plate calibration signals which are automatically integrated and used to calculate layer thicknesses. The new CALTRANS (California Dept of Transportation) Standard format for road evaluations will be provided to authorized licenses.
GPR-SLICE v7.0 has complete Vector Radargram Imaging formats! This is a the most generalized navigation formats which is inclusive of GPS, total station, any random track, but with the addition of antenna/radar scans vector in 3D space. With the new 20 columns Vector-GPS formats, any orientation conceivable with GPR can be visualized in GPR-SLICE v6.0.
GPR-SLICE v7.0 is equipped with Open GL Drawing Tools to assist the user in making interpretations of depth slices and volume images, in a real time - completely user controlled graphical enviornment. The latest version of GPR-SLICE also has DXF file creation of the drawn objects for import to AutoCAD software.
GPR-SLICE has a built-in GPS track filter menu for fixing GPS fallout and a variety of recording problems, in addition to track smoothing routines. The GPS radargram track can be displayed in Open GL that allow the user to include radargrams, time slices, horizon surfaces and topography - with capabilities to show any combination of desired datasets.
OpenGL 3D visualization menus in GPR-SLICE are equipped for transparency rendering. In this example a raw radargram is interpreted for 2 utilities found at the site.
GPR surveys were conducted jointly with Dr. Salvatore Piro of the Consiglio Nacionale delle Ricerche next to the Romaneque church of Santa Maria in Vescovio, Italy. GPR-SLICE subsurface images revealed many buried wall foundations. Helen Patterson at the British School of Archaeology in Rome believes the buried buildings to be portions of a Roman marketplace which initially began construction in the 1st century BC and flourished through the 4th century AD as the Roman town of the Forum Novum. Archaeologists were able to reconstruct the entire marketplace, including living quarters, storage areas, hallways and door entrances, all of which could be discerned from the radar images. The wall foundations begin at about 30 cm from the ground surface.
One area surveyed at the Villa of Roman Emperor Traianos revealed a large oval shaped structure. This is estimated by archaeologists to be a garden pond that was probably used for domesticating eels - eels that were incorporated into a fish sauce to be eaten by the emperor. The rectangular anomalies are believed to be military buildings on the villa premises. In the radar image other buildings colocated under the oval but weaker in reflected amplitude suggest that an earlier occupation of the site may have existed prior to the construction of Traianos' villa getaway. The 3D radar volume was created from radar profiles collected at 0.5m intervals.