WHY TERRESTRIAL LASER SCANNING (TLS) IS ESSENTIAL IN SURVEYING

Terrestrial Laser Scanning (TLS) also known as Terrestrial LiDAR, stands for Light Detection and Ranging. It consists of a laser rangefinder that operates from a platform such as a tripod or other platform.

The rangefinder repeatedly measures the distances from the platform to surfaces or structures. The position and elevation of the platform are precisely determined through survey methods and dimensional control points. Thus, the coordinates of the surfaces can be calculated by subtracting the laser rangefinder distance from the platform location.

Laser scanning, with its high level of accuracy and detail, is very versatile and widely used. Here are 10 reasons for using Terrestrial Laser Scanning in surveying :

1. High Precision and Accuracy

TLS provides higher precision and accuracy compared to traditional surveying methods. The laser beam accuracy of TLS allows for the creation of highly accurate 3D models. Additionally, TLS measurements are not subject to the same human errors as traditional surveying methods, resulting in higher precision in mapping. This makes TLS increasingly popular in fields such as architecture, engineering, construction and land surveying.

2. Rapid Data Collection

TLS allows for the rapid collection of large amounts of data, making it an efficient tool for mapping. A TLS scanner emits thousands of laser pulses per second, capturing a vast amount of data in a short time. A single TLS scan can capture millions of points in just a few minutes, significantly faster than traditional surveying methods, thereby saving time and resources in the field.

3. High Level of Detail

TLS can capture data with a high level of detail, allowing for the creation of highly accurate 3D models. This high resolution is particularly useful for applications in design, analysis, and visualization. It also makes TLS valuable in fields such as archaeology and cultural heritage, where precise measurements are essential for documenting and preserving historical sites and artifacts.

4. Non-Intrusive Mapping

TLS allows mapping to be carried out without physically disturbing the site, which is particularly useful in sensitive areas or where site access is difficult. Unlike traditional surveying methods that require physical access to the site, TLS can capture data from a distance without causing any damage or disruption.

5. Versatile Applications

TLS can be used to map a wide range of environments, including urban areas, rural landscapes, and archaeological sites. It can create 3D models of buildings and infrastructure in urban areas, detailed maps of topography and vegetation in rural landscapes, and accurate 3D models of artifacts and structures in archaeological sites.

6. Cost-Effective

TLS can be more cost-effective than traditional surveying methods, especially for large or complex sites. It requires fewer personnel and can be completed more quickly, reducing labor costs and the need for repeated site visits.

7. Increased Safety

TLS enhances the safety of surveying teams by reducing the need for surveyors to work in dangerous or hard-to-reach areas. It allows for detailed data capture from a distance, eliminating the risks associated with hazardous environments.

8. Integration with Other Technologies

TLS data can be integrated with other mapping technologies, such as photogrammetry to provide a more comprehensive and accurate picture of a site. This combination can enhance data accuracy and completeness, providing both geometric measurements and high-resolution imagery.

9. Stunning Visualizations

TLS provides highly detailed data that can be used to create visually stunning 3D models and virtual reality experiences. These models can be used for urban planning, architecture, cultural heritage preservation, and more. Virtual reality experiences offer an immersive way to explore sites, which can be particularly useful for cultural heritage sites.

10. Range of Analytical Uses

TLS data can be used for a variety of analytical purposes, including volume calculations, deformation analysis, and change detection over time. This is useful in construction, mining, structural monitoring, and more. Multiple scans over time allow for the detection of changes in the surveyed area, helping identify potential safety hazards.