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

Lidar Map of Nigeria

The Enugu State has awarded a contract to a South African company to conduct aerial surveys of the state which is situated in the Eastern part of Nigeria. The creation of an accurate Geographical Information System or GIS is crucial to many government programs. The purpose of the survey is to provide the local municipality with accurate maps and surveys to be used for planning, development and infrastructure maintenance.     Southern Mapping Company will be partnering with The Digital Map Company (DMCo) in Nigeria and share their knowledge, resources and expertise. SMC will be delivering a set of digital... (read more)
2009-07-06 10:34:59

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
2018-11-15 03:22:40

Taiwanese Lidar Project

Getting Prepared for Flooding
Nearly three-quarters of the territory of Taiwan and 95% of its population are exposed to frequent natural hazard. In the aftermath of typhoon Morakot that scourged Southern Taiwan on 8th and 9th August 2009, causing the worst flooding in a century, the authorities realised that the country was dreadfully lacking in detailed, accurate and current elevation data, as well as aerial imagery covering the entire territory (36,000km2). In response, a national mapping programme spanning 2010 to 2015 was launched with the aim of simultaneously capturing the entire country by airborne Lidar and digital imagery. The authors discuss specifications, status and... (read more)
2011-07-25 04:07:49

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 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-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
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