The Study of Mapping the Seafloor

What is the Difference Between a Bathymetry Chart and a Hydrographic Chart?
This article will immerse you into the deep water of bathymetry. It explains in detail what a bathymetry map is, what it shows, what methods we use to collect the bathymetry data and, last but not least, how to create a good-quality bathymetry map. It will also cover the difference between a bathymetry chart and a hydrographic chart and the techniques our ancestors used in the past to collect and record depths. What is Bathymetry? Bathymetry is the study of mapping the seafloor. Bathymetric maps represent the ocean (sea) depth as a function of geographical coordinates, just as topographic maps represent... (read more)
2019-01-15 08:58:54

Optimizing a Low-cost Multi Sensor System for Hydrographic Depth Determination

Surveying devices with lower costs are being welcomed by hobbyists eager to determine water depth. The Department of Geodesy and Geomatics at HafenCity University (HCU) in Hamburg has been working on cost-efficient solutions in recent years. With shallow water surveys not required to be performed with the accuracy and precision of industrial projects, surveying devices with lower costs are being welcomed by hobbyists eager to determine water depth. With this low-cost demand rising, the investigative development of these products has become a scientific research issue. The Department of Geodesy and Geomatics at HafenCity University (HCU) in Hamburg has been working on cost-efficient solutions in recent years. The Old Openseamap Project During a project with openseamap.org, a Multi Sensor System (MSS) including an Echo sounder, GPS and inertial measurement unit (IMU) was built up and tested. Despite... (read more)
2019-04-08 01:44:05

Habitat Mapping - Increasing Importance

Two decades ago as CO of a survey ship, I interpreted the SSS-registrations (still on wet paper) twice. Once was for nautical charting purposes and the second, in my own time, was simply to ‘get the most from data collected at high costs’ (my hobbyhorse) when I made a bottom texture chart for those institutions interested. Since then, for various reasons e.g. a growing concern about the environment, more and more habitat studies are now conducted, ranging from baseline surveys to full-blown scientific studies. The multidisciplinary studies are mostly based on hydrographic charting specifications and data quality methods (which I... (read more)
2008-08-27 12:00:00

IMAR Acquires New Kongsberg Maritime Multi-beam Package

Imar Survey Limited has announced the acquisition of its latest suite of shallow and medium depth multi-beam echo sounder systems from Kongsberg Maritime. The new suite includes EM 3002 dual transducer head multi-beam system with Seafloor Information System, EM 1002 and EA 400 SBES. The EM 3002 is an advanced multi-beam echo sounder with extremely high resolution and dynamically focused beams. It is suited for detailed seafloor mapping and inspection with water depths between 0.5 and 150 meters. Due to its electronic pitch compensation system and roll stabilized beams, the system performance is stable even in foul weather conditions. Typical... (read more)
2005-08-12 12:00:00

Innovation Platform for Hydrographic Measurements 2.0

Flanders, Belgium, is taking a leap forward into the next generation of bathymetric measurement technology. The economic development of the maritime industry in Flemish harbours demands new and advanced technologies to stay ahead of various challenges. There is especially a need for continuous, accurate and reliable bathymetric measurements over a wide area and at reasonable cost, according to the Maritime Access division of the Department of Mobility and Public Works. The indispensability of digital elevation models as a major source of information for evaluating the effects of human activities in sensitive environments requires breakthrough technologies in hydrographical measurements and data... (read more)
2013-10-29 03:12:34

FarSounder Joins NOAA as a Trusted Node

FarSounder is the most recent company to join the International Hydrographic Organization’s Crowd-Sourced Bathymetry (CSB) initiative by becoming a “trusted node” with the NOAA. This project enables mariners to voluntarily contribute seafloor depths measured from their vessels to NOAA’s data repository. The partnership can be seen as a logical step because FarSounder’s customers regularly travel to remote areas with poorly maintained nautical charts, using a FarSounder 3D-FLS for real-time navigation. Due to the development of FarSounder’s Local History Mapping (LHM), the latest feature of its SonaSoft software, users now have the ability to create a real-time chart of the seafloor... (read more)
2018-11-06 09:47:51

Hydrographic Survey Engineer - Swathe Services (UK)

The primary role of the Survey Engineer will be to provide technical support on all survey equipment and software owned and sold to customers by the company.  The position is based at the company’s office in Cornwall, UK and may involve site work to support equipment rental activities and/or customer demonstrations. Main duties: Provide technical support on all survey equipment to customers and the inhouse sales team Support the R&D team with Unmanned Surface Vessel equipment integration Manage the company’s equipment rental pool for booking, tracking & checking procedures Maintain inventory and asset registers and track all calibration and maintenance... (read more)
2018-06-27 11:11:38

Update for SonarMite Driver

The SonarMite.dll is a singlebeam echosounder driver for the Ohmex SonarMite SBES. Having remained unchanged since it was first written years ago, it has now been updated. It appears also to give an output of roll, pitch, heave, battery condition and a current depth relative QA value in its string. Hypack has modified the drive so that it now displays the battery status in real time while in survey mode without being logged in the raw file. The new driver will now also record the quality code as a second depth in the raw file which can be displayed in... (read more)
2014-03-27 12:00:00

Teledyne PDS Introduces New Ways of Visualising and Controlling Singlebeams

Teledyne PDS has released a new view to display singlebeam echogram data and to control the singlebeam device. The Online SBES Echogram view and features have been developed to enable singlebeam users in the hydrographic and dredging markets to be more agile in their survey processes. The new features eliminate the need to use external visualisation or command and control software, enabling more screen space for the actual survey information. Currently, Odom DSO data (EchoTrac singlebeams) and RESON GT data (Navisound singlebeams) are supported. The Echogram view has the capability to display up-to four depth channels simultaneously, displaying one channels’... (read more)
2018-06-08 12:12:47

Bathymetric Survey of Cebu Harbor

EGS (Asia) Ltd. has completed a detailed bathymetric survey in Cebu, the Philippines, on behalf of Cebu Port Authority (CPA). Work was completed over a 30 day period, starting on 25 January 2004. To cope with the steadily increasing marine traffic within the Cebu Harbour, CPA has commenced a study on the Cebu Integrated Port Development Plan. As part of master plan of the study, it is essential to carry out a detailed bathymetric survey to map the seabed in great details in order to: To update and upgrade existing charts To map areas where siltation appears to be taking... (read more)
2004-07-26 12:00:00
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