BIM Compare FAQs

For our team to be able to create a BIM Compare, the Camera must have LDC (Lens Distortion Correction) enabled by our Support team. This means we remove the fisheye effect of the camera to make it straight. This will affect the camera's Field of View (FOV) and must be considered before approving the final FOV.

What are the Requirements?

  • A Geolocated BIM Model in any popular format (e.g. Revit, Synchro, Navisworks, or an .ifc file).

    For best results, include the project 4D timeline.

  • The camera coordinates (position on site) should be provided by a surveyor.

What FoV (Field of Vision) do we work with?

We can do BIM Compare for exterior, interior, or bird's eye view.

BIM Compare cannot be done on a 180-degree camera FOV, a PTZ camera or on a Gate Report camera.

What layers do we support?

We can overlay different layers of the BIM model on the BIM compare feature, and you can switch between them.

You can send us a federated model with all the layers or separate models for each discipline.


How often can we have the BIM realigned due to camera re-positioning?

One (1) BIM realignment per month is part of the software fee.

Any additional realignment (due to changing the position or location of the camera) per month would incur an extra cost.

What are the types of realignment that may occur?

  1. BIM - Relocation

The camera moved to a new Location / new Field of View requiring a complete realignment of the model (which will take 1-3 days estimate) 

  1. BIM - Realignment (Minor)

The camera Field of View has changed slightly due to onsite activities (e.g. camera nudged by accident) 

  1. BIM - Realignment (Major)

The camera Field of View has changed significantly due to on-site activities or due to a request for a different Field of View from the Client.

Realignments may incur additional fees. Ask your AE or CS Manager about it.

What is the difference between 2D and Forge BIM Compare?

 

2D BIM Compare

Forge BIM Compare

Scope

Camera-based

Camera-based

Definition

Static image exported from a BIM model on top of the camera live view

3D model on top of camera view

Multidimensional

2D + Timeline

3D + Timeline

Access BIM information

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