3D Laser Scanning – Digital twins as a reliable basis for modern planning

Why laser scanning has become essential

Retrofits, extensions, and modifications in industrial plants and existing buildings require a planning basis that goes far beyond conventional surveying.
Measurement errors in existing structures often lead to construction delays, additional costs, and improvised solutions—especially in complex, historically grown environments.

This is where 3D laser scanning becomes indispensable.
Using modern laser technology, existing conditions are captured completely and transformed into an accurate 1:1 digital twin. This digital representation forms the foundation for all subsequent planning, engineering, and execution processes.

Creating a precise point cloud

Using high-resolution FARO laser scanners, existing structures are captured with high density and accuracy.
Multiple scan positions—indoors and outdoors—are combined into a single, coherent point cloud, independent of:

• complex geometries
• limited accessibility
• varying lighting conditions
• extensive technical installations

The result is a faithful digital representation of walls, structures, installations, deviations, and surface irregularities.

CAD-based processing and digital planning

The point cloud is imported into our CAD systems and used as the digital basis for:

• reference modeling of structures, machinery, and plant components
• generation of precise 2D as-built drawings
• sections, elevations, and layout derivations
• collision detection for new installations
• dimensional checks and tolerance analysis
• export for BIM and further planning environments

In this way, the real-world environment becomes an integral part of the digital engineering process.

Efficient handling of large point clouds

To work efficiently with extensive datasets, we apply:

• clipping functions to isolate relevant areas
• region-based filtering to structure large data volumes
• freely defined section planes for targeted design work
• modular working areas for plant engineering, architecture, and interior planning

This enables efficient processing of even large industrial facilities without compromising performance or workflow stability.

BIM integration and digital project coordination

For larger projects, point clouds can be directly integrated into BIM workflows. Key benefits include:

• all disciplines working on a single, reliable data source
• seamless continuity from planning to operation
• early detection of geometric conflicts
• improved decision-making through full transparency

In international projects, the digital twin often serves as the central interface between distributed teams and disciplines.

Typical application areas

3D laser scanning is used in:

• industrial retrofit projects
• mechanical and plant engineering
• architecture and structural design
• existing buildings and halls
• modifications during ongoing operation
• complex measurement situations with high geometric requirements

Wherever accurate as-built data is critical, laser scanning provides a secure and reliable planning foundation.

Conclusion

Modern 3D laser scanning creates a precise digital basis for industry, plant engineering, and construction.
The digital twin reduces planning risks, accelerates decision-making, and enables efficient collaboration across all project participants—regardless of location.

This article demonstrates how we apply laser scanning in real industrial projects: from on-site data capture to BIM coordination and as-built modeling—providing transparent insight into our methodology and the tangible benefits of modern scanning technology.

Digital as-built survey for precise planning and retrofit projects

Project Overview

For an international client in Tbilisi, Georgia, a multi-section underground parking facility was fully captured using 3D laser scanning.
The objective was to create a reliable digital as-built dataset to support planned structural modifications and the integration of additional installations.

The resulting point cloud accurately represents all relevant structural elements, installations, and spatial conditions, enabling efficient and precise further processing in CAD systems.

Why This Project Was Challenging

Underground parking facilities are demanding environments for laser scanning due to their complex geometries and varying environmental conditions. Key challenges included:

• Numerous obstacles and parked vehicles
• Highly variable surface materials (concrete, steel, glass)
• Limited accessibility in certain areas
• Dense installations in ceiling and wall zones
• High geometric accuracy requirements for future construction planning

Despite these conditions, a complete and precise point cloud was generated and successfully imported into HiCAD for detailed engineering work.

International and Interdisciplinary Collaboration

This project combined engineering, digitalization, and cross-border collaboration. Key aspects included:

• On-site data acquisition in Georgia
• Scanning performed using FARO laser scanner technology
• CAD processing and modeling carried out in Austria
• Digital collaboration across multiple countries
• Use of the point cloud as a direct planning basis for future installations and structural extensions

This workflow enables efficient retrofit projects where accurate as-built data is essential—independent of geographic location.

Technical Outcome

The completed scan resulted in a comprehensive point cloud accurately representing:

• Parking layouts and spatial geometry
• Columns, walls, ceilings, and load-bearing structures
• Ramps, transitions, and elevation changes
• Technical installations and infrastructure
• Fixed obstacles and built-in elements
• Existing vehicles and temporary objects (for orientation purposes)

The dataset was subsequently used for:

• Collision-free integration of new structures
• Precise layout and positioning studies
• Geometrically reliable design of additional installations
• Reduction of planning errors and construction risks

Conclusion

This project demonstrates how 3D laser scanning combined with modern CAD integration significantly improves planning reliability in retrofit and refurbishment projects.

By creating a high-precision digital representation of the existing environment, engineering decisions can be made with confidence—across borders and disciplines—making laser scanning an indispensable tool for complex projects in existing structures.