What is a point cloud used for?

A point cloud is a 3D record of an object, building, or site captured as millions of measured points. Each point has X, Y, Z coordinates and usually intensity and colour. The full set is a measurable, photorealistic record that supports a wide range of uses.

Common uses

Design. The point cloud is the existing-conditions reality the design is built against. Architects, structural engineers, and MEP designers all import the cloud into their design environments.

BIM coordination. In a federated BIM environment, the cloud is the existing-conditions layer. New design coordinates against it; clashes are detected on screen.

Drawings. Floor plans, sections, and elevations are derived from the cloud — at any time, including drawings that nobody anticipated when the survey was commissioned.

Modelling. A Revit (or equivalent) BIM model is built from the cloud at agreed Levels of Development.

Verification. Installed work is verified against the design by overlaying the relevant model on the cloud.

Structural monitoring. Repeat captures, tied to the same control network, detect movement at engineering tolerance.

Inspection. Defects, geometry queries, and visual checks are made on the cloud without going back to site.

Heritage record. For listed buildings, the cloud becomes part of the building’s archival record.

Dispute resolution. Disagreements about installed work or pre-existing condition are resolved against the captured data.

Deliverable formats

• E57 — open, vendor-neutral, supported by every major design platform.
• RCP / RCS — Autodesk’s format, directly importable into Revit and other Autodesk products.
• PLY, PTS, LAS — for specialist downstream pipelines.

What makes a cloud useful long term

• Registration accuracy. A few millimetres across the capture, recorded in a registration report.
• Coordinate system. Aligned with the project survey grid or, for listed buildings, OS National Grid.
• Coverage. Includes everything the downstream uses will reference.
• Metadata. Date, conditions, surveyor, equipment, and registration accuracy all on file.

A well-captured point cloud is a one-shot capture with a long downstream life.

When a point cloud is the right deliverable

• Almost any project that involves working with existing fabric.
• Refurbishment, change of use, fit-out, and structural alteration.
• Listed building work where invasive investigation is not acceptable.
• Façade restoration design.
• Structural monitoring of critical assets.
• Dispute and forensic work on as-built quality.

How to specify

When commissioning, specify:

• The area to be captured.
• The accuracy required.
• The deliverable formats.
• The coordinate system.
• Any specific conditions (security restrictions, occupied environments).
• Any downstream uses (BIM modelling, listed-building documentation, monitoring).

For more, see What is a point cloud survey.