3D underground mapping displays the depths of detected buried services as 3D polylines with their corresponding vertical, or Z, values in the model space.

The model can also be enhanced so that pipes and ducts are displayed as cylinders based on their recorded sizes and shown at the correct height or depth.

A 3D underground mapping survey is useful when project designers or consultants require detected services to be displayed with accurate depth information.

For example, this level of detail may be required for a pipeline project where a new pipeline will be installed using directional drilling.

The survey methodologies are the same as those used for standard underground mapping, but more detailed site information must be recorded. Processing and producing the 3D results also takes longer because of the additional level of detail.

The same detection and surveying equipment is used for both 2D and 3D underground mapping surveys.

In 3D underground mapping, surveyed points are displayed at their correct Z values—representing their vertical position or depth—within the model space and are shown as 3D polylines.

In standard 2D underground mapping, surveyed points are generally displayed with a zero Z value.

Yes. GEOTEC has developed suitable line types that allow information to be displayed in 3D while maintaining the required PAS 128 quality scores and references.