Ocean Floor to be Mapped by 2030

Hydro International interviews Shin Tani, chair of GEBCO Guiding Committee
The first Forum for Future of the Ocean Floor Mapping was held in Monaco from 15 to 17 June 2016. Some 200 delegates gathered, under the flag of General Bathymetric Chart of the Oceans (GEBCO), to discuss the future of the mapping of the ocean floor, aiming to come up with a roadmap towards 100% coverage of a mapped ocean floor. GEBCO was established 113 years ago, also in Monaco. Hydro International talked with the chair of GEBCO Guiding Committee, former chief hydrographer of Japan, Shin Tani. Shin Tani is adamant about the need of sharing data to reach the goal... (read more)
2016-07-28 04:25:23

The Art of Bathymetry

Using 3D Printer Technology to Represent Survey Information
Great advancements have been made in three dimensional printing over the last few years and have made an impressionable impact across a variety of industries. 3D printings’ versatility can be incorporated into any industry that has some form of three dimensional design. An exciting application is to model point clouds from survey techniques to create three dimensional scaled models for visualisation and communication. In this article we will explore a new medium using 3D printed technology.  Over the last few years great advancements have been made to all forms of surveying in three dimensional data capture, whether it be multibeam... (read more)
2016-05-19 11:44:56

SHOA on the Move

Towards an efficient, digital and modern HO
In 2002, the Hydrographic and Oceanographic Service of the Chilean Navy (SHOA) established a Research and Development Department. This was to provide an independent group devoted to the investigation, development and implementation of new technologies for the management of information and restructuring of Service productive and administrative processes, independent of productive bodies. The initiative would facilitate technological harmonisation of projects contained in the Seven Years Development Plan (2001-2007). It would also be in line with the governmental modernisation process launched by Presidential Instructions towards E-government and a National Territorial Information System (SNIT), intended to form a geo-spatial data infrastructure for... (read more)
2008-01-01 01:00:00

Dredge Efficiency and Precise Positioning

Integrating Dredging and Hydrographic Techniques
Dredgers involved in mining for (precious) minerals and metals often work in an inland dredging pit. Dredgers float in a ‘wet environment’ where the surrounding water is used as transport medium. The fact that the minerals are mostly covered in various sediments is one of the biggest problems in mining them. This article describes some of the techniques used in these dredging operations and illustrates the importance of integrating techniques and information. Most minerals, like rutile and zirconia, are to be found on top of a layer of clay with the highest concentrations found closest to it. Pewter is mostly... (read more)
2008-01-01 01:00:00

Satellite Derived Bathymetry Migration

From Laboratories to Chart Production Routine
Much has been said about Satellite Derived Bathymetry (SDB), but with the exception of SHOM, which led to the introduction of a number of SDB charts into the French chart series, next to nothing has been implemented within the international hydrographic community. This article aims to update readers as SDB, thanks to new generation satellites and modelling, seeing the light after going through a thirty years’ tunnel. In 2014, detailed tests and analysis conducted by government hydrographers, cartographers and recognised satellite scientists operating for a number of projects initiated by the European Space Agency, the WWF and other stakeholders, were completed,... (read more)
2015-10-12 04:09:41

Technology in Focus: Multi-beam Echosounders

New Technology, New Capabilities and New Markets
The evolution of multi-beam echo sounders (MBES) is leading to systems with enhanced capabilities in their traditional markets, but also provides features to allow the expansion of their use into new areas and applications. This short review highlights some of the features of the latest generation of systems. The attributes of an MBES system are traditionally described by technical specifications, such as operating frequency, pulse length, beamwidth, number of beams and coverage. These technical parameters define the nature of the system, but the fundamental characteristics of greatest interest. By Dave Mann, Gardline Geosurvey, UK. Just as technological advances mean there... (read more)
2013-03-26 02:25:34

Educational Institutes Need to Reach Out in Co-operation

Hydro international Interviews Nicolas Seube
Brest is the biggest supplier of highly qualified hydrographers in Europe with more than 30 graduates per year and growing. Can you explain the success of ENSTA? The success of ENSTA has several components. Our institute is a Grande Ecole, which means that students must take a National competitive exam in order to get in, or go through a selective file examination after a BSc or a first year of MSc. This ensures us of high level students. Our curriculum contains difficult scientific components, applied mathematics, physics and information technologies to ensure that students obtain a thorough understanding of the... (read more)
2012-07-26 03:31:50

Mapping Diamondiferous Gravel

Using the Aquares Resistivity System on a Fluvial Diamond Concession
An Aquares resistivity survey was carried out in a river in sub-Saharan Africa to map the sub-bottom features of a diamond concession. Diamondiferous gravels were distinguished remotely from bedrock and other soft sediments by the Aquares Resistivity System (ARS), a sub-bottom acquisition and profiling tool. It was selected due to its cost-effective operation and ability to provide qualitative and quantitative results. The ARS utilises recently developed processing innovations, which enable data to be presented in vertical sections and horizontal slices. This facilitates accurate volume calculations and the development of isopach maps for distinguishable types of bedrock and sediments. Acoustic sub-bottomprofiling... (read more)
2009-06-04 12:00:00

Hydrographic Data Science

The Art and Craft of Making Useful Hydrography
We are seeing the introduction and application of automated technologies everywhere that supplant the common and accepted ways of doing jobs, writes Paul Cooper. Indeed, the pages of Hydro International are often dominated by examples of such applications, and most of us can think of concrete situations or comparisons between ‘then and now’. Modernisation and new thinking are dramatically changing the way hydrography is collected, processed and made available to users. As the focus is shifting from data collection to data analysis, hydrographic data scientists are becoming increasingly important. When I reported on board at the Naval Oceanographic Office in 1971, we had just... (read more)
2018-01-09 08:44:12

Mapping Submarine Groundwater Discharge with Thermal Infrared Imaging

Using Cutting-edge Technology and High-resolution UAS
Submarine groundwater discharge (SGD) is a significant part of the water cycle that delivers anthropogenically derived and naturally occurring nutrients to coastal waters. As part of the drive to develop methods to prevent the degradation of coastal water quality, research conducted at the University of North Carolina Wilmington attempts to address the ambiguity associated with SGD point source locations. This case study outlines how cutting-edge high-resolution unmanned aerial system (UAS) thermal infrared (TIR) imaging methods have been coupled with the newest technology for continuous and autonomous SGD monitoring. Submarine groundwater discharge – the process in which groundwater flows down-gradient through... (read more)
2020-07-14 08:21:52
Search Filter