3D Laser Scanning & BIM Glossary and Comparisons

Key 3D scanning & BIM terms, defined

Point cloud

A point cloud is a dense set of 3D data points captured by a laser scanner, each with precise X, Y, Z coordinates, that together form an accurate digital model of a space or object.

Reality capture

Reality capture is the process of digitally recording existing physical conditions — via laser scanning, photogrammetry, or 360° imaging — to create measurable, true-to-life 3D data.

Registration

Registration is aligning multiple individual scans into one unified coordinate system so the combined point cloud is accurate and seamless. Survey-grade registration is typically 2-4 mm.

Level of Development (LOD)

LOD describes how detailed and reliable a BIM element is, from LOD 200 (generalized geometry) to LOD 350 (accurate, coordinated elements with interfaces between systems).

As-built drawing

An as-built drawing is an accurate 2D CAD drawing documenting a building exactly as it currently exists, typically produced from a laser scan rather than the original design intent.

Record drawing

A record drawing is a design drawing marked up to show changes made during construction — it reflects reported changes rather than an independent measurement of actual conditions.

Scan-to-BIM

Scan-to-BIM is the workflow of converting a laser-scan point cloud into an intelligent Revit/BIM model of an existing building.

360° virtual tour

A 360° virtual tour is an interactive set of panoramic images (often Matterport-style) that lets viewers walk through a space remotely.

How the methods compare

3D laser scanning vs traditional measuring

Traditional tape or total-station measuring captures a limited number of points by hand and is slow and error-prone on complex sites. 3D laser scanning captures millions of precise points in minutes, producing a complete, verifiable record of existing conditions.

Matterport vs LiDAR laser scanning

Matterport-style cameras are fast and great for 360° visualization and rough dimensions, but survey-grade LiDAR laser scanning delivers far higher accuracy (typically 2-4 mm) suitable for design, fabrication, and as-built documentation.

As-built vs record drawings

Record drawings are marked-up design drawings; the as-builts we produce are independently field-verified from a laser scan of the actual building, making them far more accurate.

Point cloud vs BIM model

A point cloud is raw measured data — millions of points. A BIM model is an intelligent, object-based 3D model (walls, doors, MEP) built from that point cloud, with data you can schedule and coordinate.

Scan-to-BIM vs 2D as-builts

2D as-builts give you accurate drawings; scan-to-BIM gives you a coordinated 3D model with embedded data for clash detection, renovation design, and facility management.

Frequently asked questions

What is the most accurate way to document a building?

Survey-grade 3D laser scanning, which captures millions of measured points and registers them to 2-4 mm accuracy.

Do I need a point cloud, as-builts, or a BIM model?

It depends on your goal: a point cloud for raw reference, 2D as-builts for drawings, or a scan-to-BIM model for coordinated 3D design and data.

Is laser scanning better than Matterport?

For accuracy and design use, yes — LiDAR laser scanning is far more precise. Matterport excels at fast 360° visualization.

How accurate is 3D laser scanning?

Survey-grade scanning typically achieves 2-4 mm registration accuracy.

What areas does CAD Construct LLC serve?

Pittsburgh and Western Pennsylvania, with travel available for larger projects.

Need existing conditions documented accurately?

Talk to CAD Construct LLC about 3D laser scanning, as-built drawings, and scan-to-BIM across Pittsburgh & Western PA. Contact us or call (800) 967-2627.

Topic glossaries

Go deeper with our topic-specific glossaries: 3D laser scanning terms, as-built documentation terms, and scan-to-BIM terms, and 360° virtual tour terms.