3D Underground Mapping
GEOTEC Surveys also provide survey results in 3D AutoCAD DWG format for buried services & utility mapping surveys, as well as those in line with PAS 128.
This is achieved through precisely understanding the positions, depth and sizes of the services which are visible within their corresponding manhole or inspection chamber, which are topographically recorded using a Total Station.
Their routes are surveyed using radio frequency detection AND Ground Penetrating Radar (GPR) on a suitably tight orthogonal grid, so that the depths can be evaluated in line with the ground level (z).
The 3D outputs identified below have predominantly been produced using a multi-array GPR system and post processed in special software to allow a 3D representation to be produced.
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Examples of rendered 3D buried services survey results
The detection of buried services & utilities is conducted using the same standards, techniques & methods used for our 2D surveys, including GPR & EML; however additional data is collected in order to provide a 3D representation.
This tool also allows us to confirm the presence of metallic and conductive services that have already been detected through radio frequency detection / electro-magnetic locating (RFD / EML).