FAQ: Surveyed Surface impact on volumes

Document created by David Kosakowski on Oct 22, 2020Last modified by David Kosakowski on Oct 26, 2020
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How do Surveyed Surfaces impact my volumes?



Surveyed Surfaces can be used as an original ground for a project before any machine data was recorded. They can also be used for an ‘as-at’ state of the project stating at a certain point in time this was deemed to be the truth for how the Project surface looked. 

Surveyed Surfaces work on the basis on the Surveyed Date that is specified when the Surveyed Surface is imported into WorksOS. This Surveyed Date works in two ways with Machine Data:

- Any Machine Data in the same area as the Surveyed Surface that is dated prior to the Survey Date will be superseded by the Surveyed Surface.

- Any Machine Data in the same area as the Surveyed Surface that is dated after the Surveyed Surface will supersede it.

Surveyed Surfaces can combine with machine data to form a composite of the two where there are both data types in an area see the two rules above. Where there is both data types in different areas, both data types will be used as a composite. A Project Extents calculation will go back to the first recorded surface for the project, whether it is an original ground Surveyed Surface or the first Machine Pass to determine the starting point.