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What is the Difference between GPR Scanning and 3D Laser Scanning?

Added: Monday, November 14th 2016 at 6:10am by advancedengineering
Category: Technology

GPR scanning is into practice for quite some time now and the latest 3D laser scanners can now offer the most accurate data through surveying. There are many unique benefits to both the methods, but the surveyors as well as clients are a bit confused lately about which method to use.

The requirements of each project may vary, so it is important to consider various aspects of the project in order to decide which one to adopt. Here, we will discuss in detail about both GPR and 3D laser scanning so that you can get a better insight about the differences between them and decide which can be best used for the purpose in hand.

GPR scanning

GPR scanning will enable comprehensive coverage of a construction or plant site and the survey is targeted to many specific features. In GPR scanning, the entire site is scanned in a grid pattern, which will record all the images and specialised software to be used to process the information. Finally, a complete report as an annotated site plan can be created based on the client specifications and by detailing all the survey findings.

 GPR surveys are now also used to investigate the buried features too as in case of;

         Underground fuel pipes, tanks, and utility structures.

        Void detection

        Buried structures as foundations and footprints.

        Concrete rebars

        Pile caps

        Non-metallic entities as plastic structures and fibre optics

        Asphalt thickness detection

        Chimney flue surveys

        Screen thickness etc.

 When compared to the old invasive techniques, GPR scanning is a fully non-destructive / non‑intrusive alternative over which only needs access to any one side of the structure. GPR scanning is also used effectively in concrete scanning to assess complicated concrete structures as mapping of the reinforcing bars, to determine slab thickness, locating concrete pipework and conduits, detection of any structural anomalies or voids in big concrete structures etc.

 3D laser scanning

 3D laser scanning is the latest revolution in terms of structural scanning, which uses laser technology for High Definition Surveying (HDS). This enables capturing of up to one-million co-ordinated points per second. Data collection is made much easier, quicker, and accurate with 3D laser scanning and its remote operational capabilities help the surveyors to ensure more safety with lesser on-site time needed for surveying.

 A combination of technologies like Faro, Leica, and high definition (HD) imaging cameras is used for 3D scanning, which can give the most realistic survey reports based on the specific needs of the projects and clients. Featuring easy integration with third party software like CAD, 3D and 3D floor plans and elevations can be rendered easily with the help of 3D scanning.

 3D laser scanning technology is now very effective used in projects like;

         Building surveys

        Engineering surveys

        Elevation surveys

        Right of light surveys

        Volume surveys

        Building information modelling

        Heritage surveys

        Topographic surveys

        3D modelling

        3D rendering

        Clash detection

        As-built surveys

        Verticality surveys of various structures

 3D laser scanning is highly adopted in industries like property, construction, domestic, industrial, oil & gas, architecture etc. Offering a lot more than the traditional surveying and measuring methods, 3D scanning technology is expected to be the most effective solution in future for many existing surveying challenges.



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