Evolution in Nautical Charting

Toward Convergence of Paradigms
For all their difficulty to learn, implement, fix, re-learn, and keep trying to fix, data standards have become essential to many aspects of our modern world. For almost 90 years, the International Hydrographic Organization (IHO) has provided international standards for nautical charting and hydrography. This in itself was a paradigm shift compared with previous centuries of ocean navigation, in which nautical charts were carefully guarded as state and industry secrets. The next great paradigm shift began when the IHO’s S-57 Transfer Standard for Digital Hydrographic Data was introduced in 1992 to enable nautical chart data to be transferred digitally and... (read more)
2011-09-08 02:11:23

Low Cost or Cost Effective?

Managing cost through the fit for purpose principle
When asked to do an article on low cost hydrography within the offshore construction industry the first word that sprang to mind was 'cheap'. However 'cheap' might not be 'cost effective' which is, or at least is supposed to be, the decision driver. For a private Company to remain in business it is essential that any external service hired, provides value for money. Hence all survey services within the private sector can be considered 'lowest cost'. There is however another critical factor that shall be considered. If a service impacts on installation spread efficiency, it might be worthwhile to spend... (read more)
2008-01-01 01:00:00

Lidar Bathymetry on the Alaskan North Slope

Inventory and Characterisation of More than 4,500 Shallow-water Bodies
In June 2014, the Bureau of Economic Geology, a research unit at the University of Texas at Austin, was contracted to conduct an airborne bathymetric Lidar survey on the Alaskan North Slope. The purpose of the project was to further determine, understand, and map the local landscape and thaw-lake attributes of an area west of the Dalton Highway and Sagavanirktok (Sag) River, approximately 30km southwest of Deadhorse, Alaska. Researchers from the Bureau had visited the area in 2012 and found bathymetric Light Detection and Ranging (Lidar) to be an effective tool for measuring the area’s lakes. The group returned in... (read more)
2016-04-04 10:08:41

Riverbed Surveying

Hydromapping - High Resolution Shallow Water Mapping from an Airborne Platform
In order to meet the requirements of the European Water Framework Directive (EU-WFD), authorities face the problem of performing area-wide surveys of all kinds of inland waters repeatedly. Especially for mid-sized and small rivers, a traditional survey approach imposes almost insurmountable logistical efforts and costs. Employing the new airborne hydrographic laser scanner RIEGL VQ-820-G, potential large-scale surveying of a river system is exemplarily demonstrated on the river Loisach in southern Germany, carried out by the company AirborneHydroMapping (AHM) and the University of Innsbruck. By Martin Pfennigbauer, RIEGL, and Frank Steinbacher, University of Innsbruck, Austria. In co-operation with the Bavarian Water... (read more)
2012-03-08 04:33:36

Improving Uncertainty Visualisation in ENCs

Towards a Better Portrayal of Bathymetric Data Quality for Mariners
The visualisation of bathymetric data and associated uncertainty in electronic nautical charts (ENCs) is important when it comes to planning and monitoring a ship’s route safely. However, a study confirmed that the current uncertainty representation is not very intuitive and does not provide clear orientation for mariners. To improve this situation, Fraunhofer IGD proposed novel visualisation solutions for the next-generation S-101 ENC standard. Read on for a summary. Electronic nautical charts (ENCs) are common tools for safe navigation at sea. By providing information concerning water as depth zones, contours and spot soundings, they support mariners in planning routes, which maintain... (read more)
2017-02-01 09:33:04

Hydrographic Use of Satellite Imagery in South Pacific

The French Hydrographic Office (SHOM) uses remotely sensed visible imagery for the cartography of atolls and reefs. It is considered as an efficient and relatively inexpensive method to collect information where data is sparse. Remotely sensed visible imagery is used in Pacific French Overseas territories for the cartography of atolls, reefs et cetera. All shallow-water areas may be involved, in particular when the cost of usual hydrography would be out of proportion with maritime traffic. Remotely sensed imagery is mixed with all field information available (bathymetry, buoys, seamarks) and a ‘spatiocarte’ (spatio-chart) is produced, which provides information on: Land: coastline,... (read more)
2008-01-01 01:00:00

A Challenge in the Arctic

Bathymetric Survey for Delineation of the Extended Continental Shelf of the Russian Federation
In 1997, the Russian Federation (RF) ratified the United Nations Convention on the Law of the Sea and started the explorations intended to specify the outer limit of the continental shelf in the Arctic Ocean. In December 2001, Russia was the first State to present the Submission on the outer limit of the continental shelf in this region prepared in compliance with the requirements of the Convention to the Secretary General of the United Nations. In 2002, the UN Commission on the Limits of the Continental Shelf prepared its decision concerning the submitted Claim of the Russian Federation. The commission... (read more)
2012-03-08 04:47:48

Identification of the ­Wreck of the U.S.C.S.S. ­Robert J. Walker

From 21 to 24 June 2013, a NOAA team from the Office of Coast Survey (OCS) and the Office of National Marine Sanctuaries (ONMS) conducted a joint mission to explore a shipwreck off the coast of New Jersey near Absecon Inlet and Atlantic City. That wreck has proved to be the oldest known wreck of a hydrographic survey ship yet found, Robert J. Walker, a US Coast Survey ship wrecked in 1860 with loss of twenty crewmembers, whose tragic story resonates within NOAA to this day. The NOAA Ship Thomas Jefferson, performing hydrographic surveys off the New Jersey coast in... (read more)
2013-12-04 05:01:20

When the Boat Comes in

In the November/December 1998 issue of Hydro international I summarised considerations related to the design of a new hydrographic survey vessel. A new hydrographic survey launch (catamaran type) for the Kingdom of Bahrain and first experiences with her are described here. The online and off-line survey equipment set-up implemented with onboard database will undoubtedly lead to discussions in collegial hydrographic services. The arrival of the Mærsk chartered container ship ‘Global Myth’ on the evening of 8 December 2000 became a historic day for the Bahrain Hydrographic Section. There on the poop deck, on top of two 40’ containers was ‘Al... (read more)
2008-01-01 01:00:00

MSDI at the Flemish Coastal Division

Developing a Marine Spatial Data Infrastructure in Flanders, Belgium
The Flemish Hydrography, part of the Flemish government in Belgium, is currently setting up and integrating a Marine Spatial Data Infrastructure (MSDI) for the Belgian coast, the canal Ghent-Terneuzen and the River Scheldt. This process will be done in three consecutive phases, of which the first is nearing its testing phase. The newly developed MSDI will harmonise the data between land and sea. Not only within the Flemish government, but worldwide a shift can be seen in the appreciation and implementation of SDIs. Spatial Data Infrastructures tend to prove their use in all sorts of fields, ranging from spatial planning... (read more)
2011-03-16 12:16:00
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