Fugro Marinestar to Sponsor Hydrographic Data Acquisition & Processing Weeks

Fugro Marinestar, provider of a range of GNSS positioning services worldwide tailored for the dredging and marine construction, navy and hydrographic, wind farm and oceanographic research sectors, has become official sponsor of the Hydrographic Data Acquisition & Processing Weeks organized by 'Hydro International'. The online event will consist of a dedicated web page, extra newsletters and the bumper-packed November-December issue of 'Hydro International', the global magazine for the hydrography industry. During the Hydrographic Data Acquisition & Processing Weeks (November 9 – December 21), which will be supported by an abundance of new articles, columns, Q&As, videos and other new content, the Hydro International community... (read more)
2020-10-21 02:59:09

The Road to Autonomy: Unmanned Subsea Asset Inspection

Reducing Requirements for Manual Intervention
In 2019, Swire Seabed successfully used a novel AUV/USV solution to complete a commercial pipeline inspection campaign, surveying 175km of pipe. This involved use of a HUGIN AUV paired with the Sea-Kit Maxlimer USV. The 2019 survey campaign formed the final part of a developmental project involving Swire Seabed, EIVA, Kongsberg and Sea-Kit in which inspection work scopes were completed for Equinor. In this, emphasis was placed on the automation of survey processes, allowing remote command and control of operations. This work typifies the direction in which the industry is heading, with many survey companies now seeking to reduce requirements... (read more)
2020-10-20 08:58:57

Applying Side-scan Sonar and an AI-powered Platform for Environmental Protection

Over the past few years, the University of Delaware, USA, has participated in a state programme which supports rescuing abandoned crab pots from the seabed and researches technologies to make the search process more effective. It has developed advanced sonar surveys from a boat with further map storage and processing in SPH Engineering’s ATLAS AI-powered platform. The evaluations proved to be time-effective and more accurate in comparison to the detections of human annotators.  Blue crab fishing is a popular commercial and recreational activity throughout the United States. In order to catch these crabs, people use 'crab pots'. These devices are placed... (read more)
2020-10-19 08:42:35

Panagiotis Agrafiotis

Panagiotis Agrafiotis holds a doctorate in Engineering from the National Technical University of Athens as well as an MSc in Geoinformatics and an MEng diploma in Surveying Engineering. His current research focuses on image-based bathymetry mapping for shallow and deep waters using photogrammetry and machine learning techniques. His expertise includes 3D computer vision, remote sensing and machine learning. During the past 8 years, he has worked on more than 16 research projects as a member of the Lab of Photogrammetry of NTUA, the Photogrammetric Vision Lab of CUT and the Institute of Communication and Computer Systems of NTUA. He also... (read more)
2020-10-13 10:50:47

Bathymetry from UAV Imagery and Machine Learning

Improving Results with Refraction Corrections
Accurate bathymetric mapping of shallow areas is essential for a plethora of offshore activities. Through Structure from Motion (SfM) and Multiview Stereo (MVS) techniques, images can provide a low-cost alternative compared to Lidar and sonar systems while also offering important visual information. This article presents a new framework for mapping the seabed in clear and calm shallow waters for small- and large-scale surveys using aerial imagery and machine learning to correct the geometric effects of refraction on the 3D point clouds and the imagery. SfM is a photogrammetric technique for estimating 3D structures from 2D image sequences. It involves acquiring... (read more)
2020-10-13 10:42:39

Venezuela Performs Bathymetric Surveys with Own Satellite

Ever since the launch of the VRSS-2 Antonio José de Sucre satellite in 2017, researchers have been looking into how best to use and apply the information that it provides for the benefit of environmental development and sustainability. For example, the bathymetry derived from satellite images is very beneficial for hydrographic services, since it allows information to be obtained that has not been explored with traditional acoustic methods. The Venezuela Hydrographic Office has started to use this method, also to improve its hydrographic coverage. The Antonio José de Sucre satellite is Venezuela's third artificial satellite. It was launched from the Jiuquan... (read more)
2020-10-07 11:06:14

IHO Releases New Standards for Hydrographic Surveys

Earlier this month, the IHO released a new edition of the Standards for Hydrographic Surveys (S-44). In addition to surveys to support the safety of navigation, these standards can be adapted for oil and gas, renewable energies, dredging, geophysics and geotechnics. By clarifying the required levels of accuracy, they will help define the requirements in terms of technology, time and human resources and will save valuable resources. One of the notable changes in this latest version is the introduction of a new, more stringent classification for surveys called 'Exclusive Order', which expands the standards' applicability. This is designed for specific... (read more)
2020-10-05 08:51:31

Julian Le Deunf

Julian Le Deunf is a French hydrographic category A engineer. After graduating in 2015 from ENSTA Bretagne, where he completed a six-month internship at CCOM (UNH, US), he started at Shom as a survey team leader (in Cameroon, Gabon, Mauritania and France). He is now an expert in bathymetric data processing at Shom and is focusing in his PhD on this topic. (read more)
2020-09-29 11:07:16

Jordan McManus

Jordan McManus, programmer analyst at CIDCO. Graduated in software engineering from the University of Ottawa in 2006. Specialized in physical oceanography and software development related to remote sensing and hydrographic data processing. (read more)
2020-09-29 11:06:13

Automatic Calibration for MBES Offsets

A New Way to Monitor Your Data
Currently, calibration of MBES for hydrographic surveys is based on the traditional ‘patch test’ method. This subjective method, although rigorous, has major drawbacks, such as being time-consuming (both data acquisition and processing) and supposing that potential angle misalignments can be considered as uncoupled. A new algorithmic solution, providing an objective and repeatable first step to the automation of the calibration process, is offered through the MSPAC solution. Hydrography is essential in many marine activities: Ensuring navigational safety for nautical charts and dredging. Acquiring accurate knowledge of environmental background for offshore installations and dredging. Modelling the seabed for marine energy prospection.... (read more)
2020-09-29 10:45:33
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