Terrestrial Laser Scanning

How It Works and What It Does
Terrestrial laser scanners are contact-free measuring devices which can collect dense point-clouds of objects. After processing each point is assigned with X, Y, Z coordinates; colour and reflectance value. The relative precision, that is the ratio between absolute precision and measurement range, is better than 10-4. This technology is becoming increasingly important for surveying applications. The authors provide an overview of how the technology works, illustrated by examples from their own research activities. Lasers emit electromagnetic radiation, which is coherent and monochromatic. The emitted beams are highly directional, contain a lot of energy, bridge hundreds of metres and are reflected... (read more)
2010-12-03 02:41:52

Terrestrial Laser Scanning User Meeting

Optech is to organise its fifth International Terrestrial Laser Scanning User Meeting on 8th and 9th June 2010 in Prague, Czech Republic. Optech clients and expert users of static and mobile land-based scanning technologies will share their experiences and suggestions for best-practice implementation in an increasingly dynamic market. Presentation topics will include monitoring natural hazards and man-made structures, techniques for efficiently mapping large natural and urban landscapes, modeling inaccessible features, and analysing lidar data sets. "There has been a dramatic shift in surveying techniques in the past three years. This has been brought on by the introduction of cost-effective survey-grade... (read more)
2010-04-12 09:46:39

Airborne and Terrestrial Laser Scanning

Last month we reported back from the Intergeo trade show that it was all about three abbreviations: Airborne Laser Scanning (ALS), Terrestrial Laser Scanning (TLS) and Mobile Laser Scanning (MLS). This month a comprehensive text book, Airborne and Terrestrial Laser Scanning, appears from Whittles Publishing, aimed at students, researchers and practitioners. In just two decades all three scanning techniques have become well established survey techniques for acquiring (geo)spatial information. Yet publicly accessible knowledge about them has been broadly distributed over the literature. This concise book redresses the balance. Airborne and terrestrial laser scanning differ in terms of data capture mode,... (read more)
2009-12-29 11:50:58

Terrestrial Laser Scanning Used For Vegetation Analysis

A vegetation analysis survey using terrestrial laser scanning for Safe Trees Ltd in Jihlava, Czech Republic, has been completed. The focus of this survey was to evaluate the condition of trees using Lidar data. The collected data is used in the process of stress analysis: a requirement for determining the operational safety of trees during so-called pulling tests.    The stress analysis as accomplished by Blom Czech Republic and Control System International Ltd consists of stressing tested trees with small forces and determining the​​ trunk deformation (interpreted as resistance to breakage and torsion) and tilt of the root plate. The... (read more)
2011-10-03 09:57:46

Successful Terrestrial Laser Scanning User Meeting

Optech (Canada) has successfully concluded its International Terrestrial Laser Scanning User Meeting, held on 26 and 27 June 2012 at the Novotel Nice Centre in Nice, France. With registered attendees from around the world, the conference looked at emerging applications and fostered networking among users of Optech's Lynx Mobile Mapper and ILRIS Terrestrial Laser Scanner Lidar systems, ending on an extremely positive note. Julien Losseau, managing director of Optech in Europe said that the keynote speaker, James Kavanagh (director Land Group, The Royal Institution of Chartered Surveyors (RICS) in the UK) expressed the need to communicate the value of Lidar... (read more)
2012-07-06 12:00:00

Terrestrial Laser Scanning in Forest Inventories

Toward International Benchmarks
Terrestrial laser scanning (TLS) is an effective technique for acquiring detailed tree attributes in forest plots. During the last two decades, national mapping agencies, companies, universities and research organisations have put tremendous effort into developing methods for tree attribute estimation using TLS. There is, however, still a lack of proper understanding on TLS performance. Different data collection methods and processing standards have led to a large range in tree detection and measurement accuracy. This article explains the early results of an international benchmarking initiative for TLS methods in forest inventories. The study has identified important differences in methods that should lead... (read more)
2017-12-18 03:58:07

Mobile Handheld Competes with Terrestrial Laser Scanning

The ZEB1 mobile handheld laser mapping system has been proven to be able to outperform traditional terrestrial laser scanning during field tests in Chile. Supplied by 3D Laser Mapping and operated by Chilean company GEOCOM, the ZEB1 was used to conduct a survey of a stockpile in a covered mining facility. The same area was scanned using a terrestrial laser scanner and the results were compared. Data capture with the ZEB1 was found to be around 5 times faster while automatic data processing, via 3D Laser Mapping’s secure server facility, took less than 5 minutes. Data accuracies and definitions were... (read more)
2014-04-09 09:06:27

Terrestrial Laser Scanners

This is our third Product Survey (PS) on Terrestrial Laser Scanners (TLS). The first was published in January 2001 and the second in December 2004. A lot has changed since the turn of the millennium. First of all, the number of systems on the list has more than doubled, from nine to nineteen. Secondly, two formerly listed companies, Mensi and Cyra Technologies, have since been taken over respectively by Trimble and Leica Geosystems. Neither company was included in the 2001 survey but have been since 2004. Optech was already present with the ILRIS-3D, and Callidus, Zoller+Fröhlich and Riegl were also... (read more)
2007-07-16 03:59:48

Laser Scanning

Both overview and detail are necessary during all phases of disaster management: preparedness, prevention, emergency response, recovery, mitigation and damage assessment; and both can be simultaneously provided by earth observation (EO) from air or space. Three main EO technologies can be used: optical imaging, radar and laser scanning, the latter two being active techniques emitting energy from the sensor and detecting the backscatter. Optical imagery requires sunlight, and is most often used. Since the information is similar that perceived by the human eye, its interpretation is not restricted to GI masters. Geocoded imagery and orthophoto maps can also be automatically... (read more)
2008-04-11 12:00:00

Major Update of RIEGL’s Terrestrial Laser Scanning Software

RIEGL has released a major update to its terrestrial laser scanning software suite of RiSCAN PRO, RiMINING and RiSOLVE. The latest terrestrial laser scanning software suite update includes a number of key upgrades featuring the new RIEGL Point Cloud Database (RDB 2.0), which provides new and advanced point cloud capabilities. With this upgrade, it is now possible to visualise and manage massive files, hundreds of scans and billions of points simultaneously with a new level of detail. These new features enable massive point clouds to be visualised, with the added advantage of providing the user with the ability to instantly toggle between... (read more)
2016-01-29 09:24:51
Search Filter