What is Laser Scanning and Surveying?

What is Laser Scanning Surveying?

Laser scanning surveying is the process of measuring and documenting an existing structure or space on-site using 3D laser scanning; the resulting data is then converted into a point cloud, 2D/3D drawing, or BIM model. While traditional surveying involves measuring individual points, laser scanning surveying records surfaces simultaneously with millions of points.

In practice, searches for "laser scanning surveying" often ask: Is laser surveying sufficient instead of traditional surveying? Is the output a drawing or a point cloud? What level of detail is required in a restoration project?

Where is Laser Scanning Surveying Used?

Restoration and historical buildings: Documentation of facades, ornamentation, and load-bearing details without damage
Architectural survey: Interior plans, ceiling levels, facade projections
Strengthening projects: Determination of existing condition of column, beam, and floor deformations
Industrial facilities: As-built survey of pipelines, equipment, and machine rooms
Fit-out / interior architecture: Quick and complete measurement of the existing condition

Difference from Traditional Surveying
Traditional Surveying
Measurement speed: Slow, point-based
Detail level: Operator dependent
Difficult access areas: Scaffolding/ladder required
Output: 2D CAD drawing
Laser Scanning Surveying
Measurement speed: Fast, surface-based
Detail level: High-density point cloud
Difficult access areas: Remote scanning possible
Output: Point cloud + CAD/BIM

Outputs after Laser Scanning Surveying
Point cloud (LAS/LAZ, E57), 2D architectural plans/sections, 3D models, Scan to BIM files, and digital archives are the main outputs produced after laser scanning surveying. Depending on project needs, only a point cloud or a full BIM model can be delivered.

Important Notes

Laser scanning surveying alone does not mean "drawing delivery." Issues that need to be clarified before delivery include: level of detail (LOD), coordinate system, drawing standard (AutoCAD/Revit), reflective surfaces such as glass/mirrors, and scanning scope. Comparing prices and timelines without these definitions can be misleading.

KG Engineering

We offer laser scanning surveying services for restoration, facade surveying, reinforcement, and industrial facility projects using Leica RTC360. You can find references on our 3D Laser Scanning - Restoration, Scan to BIM, and Projects pages.