Lidar Quality Assurance

Open-source Software for Processing Lidar Point Clouds
Basic tools for processing Lidar point clouds, which can be extended depending on needs, provide a flexible platform for service providers and users alike. The companies Dielmo 3D, Spain, and Water Management, Australia, have demonstrated how a publicly available open-source application with basic tools for visualising, editing and analysing Lidar point clouds has been extended into a compliant platform that serves diverse applications including mapping of power-line corridors, land uses and riverbeds. By José Carlos Garcia and Rafael Torró (Spain), and David Hine (Australia) The platform, called DielmoOpenLiDAR and released under the GNU GPL licence, enables management and display of... (read more)
2015-06-01 11:39:59

Mapping with Mobile Lidar

High Speed, Accuracy and Density
The use of Mobile Lidar systems enters the scene when large areas have to be surveyed at accuracy and resolution exceeding those available through aerial photogrammetry, and when using static Lidar is impractical. The Lynx Mobile Mapper captures high-accuracy, high-density points, allowing easy and precise identification of objects. In 2006 Sineco S.p.A, an Italian engineering firm belonging to the ASTM Group, began collaborating with Optech Incorporated, the Canadian manufacturer of laser-based imaging systems, to develop a mobile Lidar system. The first prototype, ready in early 2007, combined two ILRIS-3D laser scanners with a position-and-orientation system (Applanix POS LV 420). This... (read more)
2009-04-02 12:00:00

First ALS LIDAR Project

Airborne Laser Solutions (South Africa) has undertaken the first aerial lidar survey project in its new Rockwell Aero Commander 1000 aircraft. This survey is required for the route selection and design of a 220km-power line linking Tete in Mozambique and Blantyre in Malawi. The company’s prime equipment currently consists of an Optech 3033 ALTM LiDAR system combined with a Hasselblad camera and Phase One digital back. With this equipment in the Aero Commander ALS is able to generate terrain models at 50cm to 10cm vertical accuracy, and colour digital orthophotos at pixel ground resolution ranging from 50cm to 10cm. The... (read more)
2005-03-17 12:00:00

Swedish Lidar Project

New Nationwide Elevation Model
Airborne Lidar is being used to establish a new national elevation model of the entire territory of Sweden (450,000km2), one point per two m2. The project, spanning 2009 to 2013, is the responsibility of two internationally operating Scandinavian geospatial product service providers: Blom, headquartered in Oslo, Norway, and Denmark-based COWI. The authors discuss specifications, status and challenges posed by this large-scale, long-term project. Appointed in June 2005 by the Swedish Government to assess the impact of global climate change on Swedish society, the ‘Commission on Climate and Vulnerability’ revealed its recommendations in 2007. Climate change will entail rising sea levels,... (read more)
2011-02-03 04:02:29

Kansas Lidar Elevation Survey

AeroMetric, USA, has been awarded a contract to provide the State of Kansas with Lidar elevation data covering 9,720 square miles in the eastern part of the State. This is an area including 11 counties, the Missouri river and Kansas City.   Funded by state and county agencies, this project is a key component of the Kansas Geographic Information System Partnership initiative which aims at developing a robust geospatial infrastructure to enhance the safety, economy, environment and quality of life in Kansas.   This project augments AeroMetric's extensive state mapping experience, which includes major recent projects in Alaska, Minnesota, North... (read more)
2012-02-15 09:56:47

Lidar Use in Haiti

A new last minute addition to the International Lidar Mapping Forum conference program will include two presentations on how Lidar is being used in Haiti to assess the damage from the recent earthquake and the future probability of subsequent earthquakes. Imagery of the region damaged by the M7 Haiti earthquake, including high-resolution photography and airborne Lidar, has revealed a variety of ground failure that resulted from shaking. Surprisingly, the Enriquillo Fault seems to have not ruptured at the ground surface, so the negative result obtained from imagery has significant implications. The USGS issued a statement, based on imagery analysis, that... (read more)
2010-02-11 03:12:02

Airborne Lidar in Rainforest

Towards a UAV-based System for Measuring Canopy Height
At the experimental forest site Paracou in French Guiana, a range of data is being collected to enable the short-term dynamics within the tropical rainforest canopy to be better understood and quantified. Airborne laser scanning (ALS) was used to obtain high spatial resolution data of the 3D canopy structure. The data has been utilised to build a canopy height model and provides valuable information about the foliage density. The sensing system can also be mounted on an unmanned aerial vehicle (UAV). The French Guianian project demonstrates proof of concept for the further application of this technique. By Sam Fleming, Prof... (read more)
2014-09-01 11:42:29

Lidar and Sound Modelling

Improving Existing Propagation Models
Simulation of sound propagation is key for today’s urbanised society, in which sound is omnipresent and often negatively affects people’s lives. Existing methods of sound-propagation modelling fail to capture the complexity of terrain. Airborne Lidar in conjunction with aerial photos is able to fill this gap. The authors propose a programme of research to find out how high-resolution terrain data might improve the efficiency of sound models. Sound propagation is affected by obstructing objects such as buildings and trees, and influenced by the relative location of sound source and receiver, type of intermediate ground and meteorological conditions. Computation of sound... (read more)
2007-08-11 12:00:00

Optech Lidar Technology

Optech Lidar technology has successfully delivered The weather report from Mars at the heart of NASA's Phoenix Mars mission. The Phoenix Mars lander made a dramatic landing on the Red Planet on Sunday, 25 May 25, after a journey of 10 months and hundreds of millions of miles through deep space. The first Lidar results from Mars arrived late in the evening of 28 May, amid cheers and applause from NASA officials and science team members gathered at JPL and the Science Mission Operations centre at the University of Arizona. The Phoenix Lidar was designed and built by Optech in... (read more)
2008-06-06 09:10:10

Velodyne Lidar Introduces Low-cost Small Lidar Sensor

Velodyne Lidar has introduced Velabit, the company’s smallest sensor that brings new levels of versatility and affordability to 3D Lidar perception. The Velabit leverages Velodyne’s innovative Lidar technology and manufacturing partnerships for cost optimization and high-volume production. The sensor contributes to Velodyne’s mission to make high-quality 3D Lidar sensors readily accessible to everyone. The Velabit perfectly complements Velodyne’s sensor portfolio. The sensor delivers the same technology and performance found on Velodyne’s full suite of sensors and is set to be the catalyst for creating endless possibilities for new applications in a variety of industries. The compact Velabit can be embedded... (read more)
2020-01-16 09:18:33
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