Data Quality

In hydrography, there are many aspects influencing the quality of your data during acquisition, processing and managing the data. This theme gives an overview of articles reflecting on this subject.

Must read

Quality Control of Survey Data

Quality control of survey data is an integral part of any hydrographic survey or inspection operation, but the focus is too often concentrated on the wrong sensors, the carrying out of unnecessary comparisons and ultimately burying real issues in a flood of confusing and con... (read more)
Most read

Rapidly Identifying Patterns and Problems in Multibeam Datasets

The Naval Oceanographic Office (NAVOCEANO) utilises a diverse suite of survey assets to collect high-resolution oceanographic and hydrographic data in shallow-water areas all over the globe. These assets maintain a high operation tempo, resulting in extremely large data volu... (read more)
About the 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. to present a complete recap of the subject. If you don't want to miss these themed recaps, sign up for the newsletter (sign up here).

Data Quality

Great Potential for SAS in Hydrography

Synthetic Aperture Sonar (SAS) has been around for over a decade but its primary purpose has been in mine detection rather than hydrographic surveying. To use SAS effectively a stable survey platform is required such as an au... (read more)

Effective Surveying Tool for Shallow-water Zones

A recent article provides an overview of satellite-derived bathymetry methods and how data can be integrated into survey campaigns, and showcases three use cases. Bathymetric data in shallow-water zones is of increasing impor... (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... (read more)

Improving Satellite-derived Bathymetry

Bathymetry is traditionally acquired using singlebeam or multibeam echosounders. This method produces accurate depth measurements along transects but is constrained by operating cost and an inability to survey in very shallow... (read more)

Error in GNSS Augmented Heading Systems: Influence of Attitude

My earlier articles on the alignment of motion reference units (MRU) with the ships reference frame (SRF) did not cover the calibration of GNSS augmented heading systems. Although the alignment can be done in the same way as... (read more)
Data Quality

Improving Uncertainty Visualisation in ENCs

The visualisation of bathymetric data and associated uncertainty in electronic nautical charts is important when it comes to planning and monitoring a ship’s route safely. However, a study confirmed that the current unc... (read more)

Technology in Focus: Hydrographic Processing Software

Discussing and comparing software has often been tricky in Hydro International as it is difficult to put the packages together and see clear differences. In this overview of hydrographic processing software, we will high... (read more)

Telepresence Technology

Telepresence, in this context, refers to the suite of technologies and operational methodologies required to allow key mission personnel to be located onshore while conducting ship-based oceanographic research and exploration... (read more)

Crowdsourcing Enhances Navigation Awareness

In this internet age, crowdsourcing is fast providing practical contributions to our understanding of the world around us. Whether it be software developed in an open-source environment, inputs from ‘those in the know&r... (read more)

Very Shallow Water Survey - a New Approach

Hydrographic surveys in very shallow waters can have several applications such as nautical chart updating, performing environmental monitoring and characterisation, determination of dredged volumes, establishing navigational... (read more)
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