Lidar

This issue of GIM is largely devoted to emergent Lidar technology. We have a feature on 3D-visualisation of Lidar data co-authored by new contributing editor Dr Bharat Lohani of IIT Kanpur India, and no fewer than two product surveys, one on Airborne Lidar Systems, the other on Lidar software. Two regular features, Technology in Focus and Company’s View, this month address processing the product of Lidar survey, point-clouds. Lidar is without doubt a most successful data-acquisition technique. As an acronym of Light Detection and Ranging - some prefer to read Lidar as Laser Imaging Detection And Ranging - the term... (read more)
2007-01-19 12:00:00
2017-01-05 08:56:47

LiDAR Compressor

LizardTech has released the LizardTech LiDAR Compressor. This product enables users to turn giant point cloud data into efficient MrSID files that retain 100% of the raw data at just 25% of the file size.     Unlike raw LAS or ASCII data, LiDAR files compressed to MrSID are easily managed resources from which derivatives can be extracted over and over again. One of the key features of LiDAR Compressor is its ability to reduce LiDAR file sizes by 75% while retaining all of the points and all of the point precision and accuracy of the original file. If users... (read more)
2009-07-14 09:49:29

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

International Lidar Mapping Forum

Rapidly Increasing Acquisition Capabilities
With over 580 registered delegates from 32 countries, forty international exhibitors and nearly a hundred abstracts submitted, the eighth annual International Lidar Mapping Forum(ILMF) reflected the growing importance of Lidar and was one of the most rewarding ILMF events ever.<P> Lidar manufacturers, service providers and users, including national and state government departments, presented a total of 34 technical papers. Jamie Wilder of Sanborn Map discussed trends in miniaturisation and software-controlled sensors, and recognised the need to establish national standards and control systems for metadata. He also considered threats posed by lower commercial rates and competition from other technologies such as... (read more)
2008-04-11 12:00:00

Capturing Scenes with Lidar

Technology in Focus has on three occasions (February 2005, 2006 and 2007) addressed laser and terrestrial Lidar, also called 3D-laser mapping. The first two articles treated the laser component, and the last was on software processing to extract meaningful object models from point-clouds. This fourth article focuses on precautions required when capturing scenes. Terrestrial Lidar: I know what it is, I know what it does, but how do I capture a scene? Vendors of terrestrial Lidar scanners often proudly present the operation of their instruments in the field as “a piece of cake”. And they are right; it is convenient.... (read more)
2007-07-07 12:00:00

Finnish National Lidar Survey

Blom has been awarded a contract to provide Lidar data for the National Land Survey of Finland (NLSF). The total contract value is approximately NOK34 million over a period of four years. The contract is expected to be signed in January 2010, with start-up of the project at the beginning of second quarter of 2010. NLSF is responsible for production and maintenance of geographic- and real estate information in Finland. The purpose of the project is to create a new and accurate national height model covering an area of app. 120 000 sq.km.The dataset will also provide valuable information for... (read more)
2009-12-18 03:04:04

Lidar-based Survey Solutions

Optech Incorporated
Optech Incorporated focuses on the development, manufacture and support of advanced, lidar-based survey solutions. Established in 1974 as a privately held, Canadian-owned research and development firm, Optech was originally an offshoot of research into light detection and ranging ('laser radar') conducted by its founder, Dr Allan Carswell, at York University in Toronto. In the 1980s Optech airborne lidar systems produced the world's first nautical charts based on airborne lidar data. In the early 1990s, ground-based Differential Absorption Lidar (DIAL) systems were installed at several Arctic sites to monitor stratospheric ozone. At the same time, the company developed the compact, versatile... (read more)
2005-03-21 12:00:00

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
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