Use case TK02: Spatially relate aspect models from different sources

[aothms]

In a construction project, aspect models are created by subcontractors without the ability to establish relationships outside of file boundaries. When coordinating on the complete project with all models incorporated, spatial relationships from elements by different disciplines have to be inferred.

Based on the type of elements and the relationship of the aspect models you would want to be able to infer e.g:

• Every column in the architecture model should have an 'equivalent' representation in the structural model
• Every column needs to have a reinforcing bar contained in the geometry
• Elements of this type cannot intersect with that type
• Elements of this type have to touch an element of that type

Given precision and rounding issues these operations have to be assessed under a specified tolerance.

Precision issues:

• Construction tolerance, modelling sloppiness
• Rounding errors due to matrix multiplication from local placements