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

Airborne Lidar

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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

Airborne Lidar Bathymetry

Mapping Shallow Rivers Under Low-flow Conditions

Although operational for more than twenty years, Airborne Lidar Bathymetry (ALB) has rarely been used in riverine areas. The US Bureau of Reclamation adopted it to study how flow change in the Yakima Rivera affected fish habitat. The authors show that ALB offers accuracy and precision at least as good, if not better than that achieved in typical survey by boat with sonar and GPS. The United States Bureau of Reclamation needed to create an accurate hydraulic model of the Yakima River in Washington State to study how changes in river flow would effect downstream fish habitat. For many years... (read more)

2006-10-23 12:00:00

Lidar Flight Planning

A System with Minimal User Intervention

Airborne Lidar has become a regular technology for acquiring accurate, consistent and dense point clouds. However, the constraints on specifications, available sensors and aerial platforms are still a challenge for Lidar data acquisition. Optimal flight planning is essential. Current practices rely on rules of thumb and trial and error, meaning that optimal solutions are rare. The authors have developed a Lidar flight planning system which does provide an optimal solution at a high level of automation and requiring minimal user intervention. Once acquired, Lidar data should satisfy the specifications on density, overlap, spatial distribution and accuracy. Data clusters and voids... (read more)

2014-02-17 10:39:05

Lidar Rectification Software

The Optech Lidar Mapping Suite (LMS) version 2.0, for Airborne Laser Terrain Mapper (ALTM) clients, has been released. The suite offers a new workflow designed for the production environment. Incorporating 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. A new lidar rectification module provides additional value by maximising and quantifying project-wide accuracies. According to Michael Sitar, Optech's Airborne Survey products manager, optimizing lidar data accuracies by minimising flight-line to flight-line variations is a standard workflow process. By incorporating proprietary lidar optical models, Optech... (read more)

2010-12-16 11:13:23

LiDAR for DRONE

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2018-11-15 03:22:40

Lidar Treatment Software Releases

Tiltan is to present the automatic Lidar processing product TLID - and the 3D Modelling Sensor and System AGM during Intergeo 2010. TLiD is an automatic solution for point cloud data processing Lidar data and other, low noise, point clouds are handled. The package automatically transforms geo-referenced point clouds into GIS layers and 3D Photo-realistic dynamic presentation. The company will be represented at the Diamond booth (1F-142). (read more)

2010-09-20 04:42:35

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