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

European Lidar Mapping Forum

Intelligent Exhibitions is organising the second edition of the European Lidar Mapping Forum. The venue will be Salzburg, Austria and is to take place from 29th to 30th November 2011. The Call for Papers has also been released with the conference committee requesting abstracts in the following areas: Data Acquisition - Airborne and Terrestrial Lidar and Bathymetric, Data Fusion & Processing Technologies, Developments in GIS & Data modelling, Industry Issues, Mobile Mapping & Survey and details on recent projects. The deadline for submission is 25th July 2011.   This event focuses on airborne, bathymetric, and terrestrial Lidar and mobile mapping... (read more)
2011-06-23 04:49:09

Lidar Rectification Software

OLMS V1.0 (Optech Lidar Mapping Suite V1.0) is a new software package for Optech ALTM Airborne Laser Terrain Mapper clients. It enables users to maximise lidar accuracies over large project areas in a production environment. Incorporating batch-mode processing capability, OLMS V1.0 automates production processing of multi-mission data collections, and includes multi-threaded and distributed processing capabilities to increase processing efficiency even further. "Optimising lidar data accuracies by minimising flight-line to flight-line variations is a standard workflow process," says Michael Sitar, Optech's Airborne Products Manager. "As manufacturers, we have the unique ability to incorporate our proprietary lidar sensor optical models, thus enabling... (read more)
2010-04-19 11:37:19

Lidar: Organising the Unorganised

A Lidar sensor generates hundreds of millions of XYZ coordinates in a few hours. From this massive number of sampled points one wants to reconstruct surfaces Lidar points are described as being ‘unorganised’; they form clouds. How to convert the unorganised into the organised Lidar has gained widespread recognition as the main source for the reconstruction of real-world surfaces. Its many applications include the creation of accurate Digital Elevation Models (DEM) and 3D-city models for planning purposes. It offers benefits for planning, design, inspection and maintenance of infrastructure. Dunes, beaches, dykes and floodplains can be captured accurately and with a... (read more)
2007-01-19 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. Here, the authors demonstrate 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. The platform, called DielmoOpenLiDAR and released under the GNU GPL licence, enables management and display of massive Lidar datasets together with vectors, rasters, OGC services such as WMS, WFS, WCS and other geoinformation. For professional... (read more)
2015-04-10 01:29:47

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

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

Lidar Rectification Software

Optech has released the Optech LMS Lidar Mapping Suite for its Lynx Mobile Mapper clients. It offers Lynx clients a new workflow designed specifically for high-volume production processing, and incorporates a fully automated batch-mode capability.     Optech LMS enables simultaneous processing of multi-mission data collects, and includes multi-threaded and distributed processing capabilities to further increase processing efficiency.   According to Daina Morgan, Optech's Lynx Mobile Mapper product manager, Optech LMS Standard includes all the capabilities the clients are used to, with the added feature of comprehensive coordinate conversion. This facilitates a transition without the need of extensive retraining.   (read more)
2011-11-29 09:31:41
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