Focus Stories

Every month we will focus on a specific theme, featuring a selection of articles which have previously been published in Hydro International magazine. By including a mix of older and more recent articles, we will present a complete recap of the subject. Furthermore, we will be bringing you a bi-weekly round-up of ‘Focus Stories’ related to the theme through our newsletter (sign up here). The theme for April 2016 is Data Processing.

Data is inevitable when it comes to hydrography. This month, data is the focus of the collected papers. What are standards, what do you need to consider for storage, analysis, display the data? And also – what is the quality of the data and how can you improve it?

Focus on: Data Processing

Casualties of the Nautical Chart

When ships run aground unexpectedly the initial presumption is that the vessel has struck an ‘uncharted’ feature. In practice this is rarely so. This article reviews a number of chart-related casualties. These demonstrate that while no charts are infallible, a better appreciation of their limitations might have... (read more)

Coastal Risk Assessment

SHOM contributes routinely to the preparedness against coastal risks along French coastlines. For this purpose, regional to coastal digital elevation models are built for implementation in forecast systems against rapid flooding. By integrating users’ needs and its expertise relative to bathymetric data, SHOM offers n... (read more)

Designing a New Way to Deliver Marine Weather Data

Mariners rely on many sources of information during daily operations to ensure their safety at sea. Nautical charts and weather information are critical and can sometimes lead to life-changing decisions. The ways in which navigation and weather data is created, disseminated and displayed by mariners are drastically dif... (read more)

Environmental Data ­Sharing and Publishing

The Port of London Authority (PLA) has had an extensive tide gauge network for many years. However, the existing system, installed in the 1990s was becoming increasingly unreliable providing inconsistent information due to a number of factors. There was a pressing need to develop a state of the art tidal monitoring system a... (read more)

Integrating Offshore Tide Model Output with Onshore Observations

The National Oceanic and Atmospheric Administration (NOAA) develops tide correctors for reducing hydrographic survey soundings to Chart Datum by using the Tidal Constituent and Residual Interpolation (TCARI) software to interpolate harmonic constituents (HCs), tidal datum elevation relationships and water level residuals fr... (read more)

Introducing GIS to Support Maritime Accessibility

With over 500 line connections to and from more than 1,000 ports around the globe, the Port of Rotterdam in The Netherlands is the cornerstone of international freight transport. It is the perfect base for import and export and a gateway to the European market and its more than 500 million consumers. However, this... (read more)

Opportunistic Multibeam Surveying

Currently only ten to fifteen percent of the ocean floor has been mapped at resolutions of 100-metre pixel size or better and the vast majority of this mapped area is within territorial waters. One way to significantly increase seafloor coverage is to outsource data collection to non-hydrographic vessels or ships of opportu... (read more)

Robust Data in Sensitive Environments

There are settings where an unmanned survey represents more than a safe, cost-effective alternative; it may be the only option. Capitol Lake in Olympia, WA, USA, is such a location. In this article, we report on a recent survey that highlights the advantages offered by an unmanned platform operating in a highly public, envi... (read more)

The Art of Bathymetry

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... (read more)

Tool to Process Sound Velocity Profiles

Hydrographic and geosciences surveys, using acoustic devices, need to use accurate water sound velocity profiles. Because the acoustic path depends on the sound velocity profile (SVP), the use of the most accurate SVP is one of the keys to conducting effective surveys (with multibeams, for instance). To date, the existing s... (read more)

What Users Want in Their Bathymetry

More and more users are demanding bathymetry to support many new and different applications. New applications have necessitated changes in data acquisition and processing technologies to meet user requirements. The complexity of these requirements needs to be better understood if bathymetric datasets are to be multi-usable,... (read more)
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