GNSS and its Uses at Berkeley
The second and third days of Dig Berkeley saw our technician Nick Hannon starting to teach our students how to use our new GNSS machine, with the intention of producing a topographical survey to the north of Trench 8 in the Paddock field. GNSS stands for Global Navigation Satellite System, and it uses a collection of navigational systems to produce accurate 3-D positioning.
Technician Nick Hannon with the GNSS machine. |
Nick and students laying out the tape for the GNSS machine. |
The Paddock Field has a deeper depth of made-up soil at the south end where kitchen gardens were installed in the 18th century and were in use up until the Victorian period. This means that most of the archaeological features in this area have been obscured by the adding of up to 1m of topsoil.
It is hoped that by using the GNSS on the shallower soils of the northern end we may get an indication of what archaeology lies beneath. This recording of all the lumps, bumps or troughs will help us to make a decision as to whether we choose to open another trench in this area or not.
Nick and students taking measurements on the GNSS machine. |
northern side of the Paddock. The machine takes a point every 50cm and this data will eventually produce a virtual 3D image of the surveyed area. In addition to helping us decide where to dig next, this survey will help us to restore the Paddock surface to the level it was before we started.
The screen of the GNSS machine, showing an aerial view of the Paddock. |
- Emily Glass and Abbie O'Connell.
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