Which One is Right for You?
Laser scanning technology has revolutionized industries like surveying, construction, and robotics by enabling highly accurate 3D mapping of environments. Whether you're capturing a historic building, documenting a construction site, or navigating an underground tunnel, choosing the right scanner can make all the difference. The two most common types of laser scanners—static (terrestrial) laser scanners (TLS) and SLAM-based mobile laser scanners—offer different strengths when it comes to speed, accuracy, and cost. So, which one is right for your project? Let’s break it down.
How They Work
· Static Laser Scanners (TLS): These scanners sit on tripods and scan from a fixed position, capturing ultra-detailed 3D point clouds by emitting laser pulses and measuring how long they take to bounce back. Because TLS units stay in one spot while scanning, they need to be moved manually from place to place to map larger areas. While this makes them incredibly accurate, it also means they take more time to cover extensive sites. A great example is the Faro Focus Premium, a high-precision TLS used for detailed architectural surveys, forensic investigations, and industrial plant documentation.
· SLAM-Based Mobile Laser Scanners: SLAM stands for Simultaneous Localization and Mapping. These scanners use a combination of LiDAR, IMUs (inertial measurement units), and smart algorithms to continuously track their position and map the environment—all while in motion. Unlike TLS, SLAM-based scanners don’t require GPS, making them perfect for underground environments, dense forests, and complex indoor spaces. The Faro Orbis Premium is a prime example of a high-performance SLAM-based mobile scanner, offering real-time mapping and rapid data collection, making it ideal for large-scale, dynamic environments.
Speed: Mobile Scanners Win on Efficiency
· TLS: Since static scanners need to be set up at multiple locations to cover a large space, the process can take hours or even days, depending on the project size. Each scan requires careful positioning, and afterward, data from multiple setups must be merged into a single model.
· SLAM-Based Mobile Scanners: These scanners work on the go, collecting data continuously as they move. This makes them dramatically faster than TLS systems—what might take a Faro Focus Premium an entire day to capture, the Faro Orbis Premium can often complete in just minutes. This speed advantage is crucial for time-sensitive applications, such as emergency response planning or facility management.
Accuracy: Static Scanners Lead in Precision
· TLS: If you need absolute precision down to the millimeter, TLS is the way to go. Because they scan from fixed positions, they eliminate motion-related distortions, making them the gold standard for engineering, high-detail 3D modeling, and forensic investigations. The Faro Focus Premium, for example, offers exceptionally high resolution, making it a preferred choice for structural analysis and heritage preservation.
· SLAM-Based Mobile Scanners: SLAM scanners trade some accuracy for speed and mobility. While still very precise, they typically have an accuracy range within a few centimeters rather than millimeters. That’s more than enough for large-scale mapping applications, but it may not be suitable for projects requiring extreme detail. The Faro Orbis Premium, while not as precise as a TLS, provides excellent accuracy for quick and efficient mapping of large environments, such as warehouses or urban landscapes.
Cost: Mobile Scanners Are Often More Budget-Friendly
· TLS: High-precision scanning comes at a cost—static laser scanners typically range from $50,000 to $150,000. They also require skilled professionals to operate and post-process the data, which can add to the overall cost.
· SLAM-Based Mobile Scanners: These systems range from $40,000 to $100,000, making them more accessible for companies that need fast, cost-effective scanning solutions. Plus, the reduced setup time and faster data collection help lower operational expenses. The Faro Orbis Premium, for example, provides a balance between affordability and high-performance mobile scanning, making it a compelling choice for businesses looking to optimize their workflow.
Which Scanner Should You Choose?
· Go with TLS if: Accuracy is your top priority. If you're working on forensic reconstructions, engineering-grade surveys, or projects that demand fine-detail 3D models, static laser scanners are your best bet.
· Choose SLAM if: You need to scan large areas quickly, especially in environments where setting up a static scanner isn’t practical. If you’re mapping underground tunnels, large warehouses, or outdoor sites where speed matters more than extreme precision, SLAM-based scanners are a great choice.
· Use Both for Best Results: Many professionals use a hybrid approach—quickly scanning an entire site with a SLAM-based scanner and then capturing critical areas in high detail with a TLS system. This balances speed and accuracy while keeping costs under control.
Final Thoughts
Both static laser scanners and SLAM-based mobile scanners serve valuable roles in the world of 3D mapping. If you need pinpoint precision, a TLS like the Faro Focus Premium is the best choice. If speed and efficiency are more important, a SLAM-based scanner like the Faro Orbis Premium is the way to go. As technology advances, the gap between these two approaches is narrowing, and hybrid solutions are becoming more common. Whatever your scanning needs, understanding these differences will help you make the best choice for your project.
Still unsure? Reach out to an Altohelix expert to find the right laser scanning solution for your needs!