Data Integration for Coastal Surveying

Combining Laser Scanner and Bathymetric Sensor
When surveying the coastline, the integration of bathymetric (below sea level) and laser scanning (above sea level) data causes problems due to the different imaging properties. However, by ensuring that the different data sets have been accurately georeferenced and oriented, a complete and accurate model of the terrain above and below sea level can be obtained. This technique was employed to survey the area of Portovenere in Italy, including the San Pietro church located on a steeply sloping rocky promontory, with positional accuracies in the order of 5cm.<P> View Larger Map One of the biggest issues incoastline survey is the... (read more)
2009-06-04 12:00:00

Oi06 in All its Diversity

Dr Richard Spinrad, Ass. Administrator for NOAA Research, and Chairman of Oi06 Conference Committee
Through the years, Oceanology International (OI) events have been the most important of their kind, and Oceanology Intenational 06 (Oi06) will be no exception. But of equal importance is the parallel-running conference, at which many papers are presented on new developments, and the simultaneously held meetings. To draw more attention to these ‘alongside’ components of Oi06, Dr Richard Spinrad, assistant administrator for NOAA Research, USA and chairman of the Oi06 Conference committee agreed to be interviewed on the conference and related matters. Please give our readers a brief explanation of how you became involved in oceanology and hydrography, and describe... (read more)
2008-01-01 01:00:00

Hydrography in Japan

Interview with D.Sc. Shoichi Oshima of the Japan Hydrographic Association
In spite of modern communications and connections by air, Japan still is for most people from Europe and America, a ‘far away country’. Hydro international is in the fortunate position to have very good contacts in Japan via dr. Shoichi Oshima, who served as Editorial Advisory Board (EAB) member since the start of Hydro international. The term of an EAB member is officially limited to two years and therefore dr. Shoichi Oshima is now leaving the EAB. On the occasion of his withdrawal he agreed to be interviewed and inform readers on some more details of hydrography in Japan. Can... (read more)
2008-01-01 01:00:00

An Introduction to EGS

From modest beginnings with just a handful of employees in Hong Kong and the United Kingdom twenty-eight years ago, the EGS Group has now grown into an international group of companies with well over two hundred permanent staff. EGS provides global, specialist multidisciplinary services and products to the civil engineering, construction, telecommunications, power, maritime, hydrocarbon and mining industries. The group head office, EGS (Asia) Ltd, is based in Hong Kong. EGS International is located in the United Kingdom and services the western hemisphere, including Africa and the Middle East. Regional offices are located throughout South East Asia, including Singapore, Malaysia,... (read more)
2008-01-01 01:00:00

New Generation Hydrographic Databases

Enhancing data availability
The importance of data availability is increasingly being recognised, not just as an important topic for an exclusive section of the geospatial community but all over the geospatial spectrum, including the hydrographic community. If data is not available it’s no use! Traditionally, hydrographic production systems have data spread over multiple (chart) files and might be set up to include (relational) databases e.g. to store point features such as navigational aids. This has, for instance, been done for more than a decade with CARIS GIS, a widely used tool for chart production at Hydrographic Offices (HOs) and in combination with other... (read more)
2008-01-01 01:00:00

The Advanced Argus System

Coastal management and engineering monitoring
Coastal managers aim for sustainable development of coastal systems, including protection of the hinterland against flooding, swimmer safety, beach recreation and nature conservation. The design and evaluation of coastal-policy measures and engineering interventions are hampered by the dynamics of any natural system. Remote-sensing techniques can provide low-cost support information. A natural system such a coastal zone is subject to the vagaries of natural conditional variation. Within in a matter of weeks to months beach nourishment adopts an equilibrium profile through phases that may be both unexpected and pose temporary problems. Rip currents may even develop within days, forming a serious... (read more)
2008-01-01 01:00:00

FIG and Hydrography

Interview with Adam Greenland, Dep Port Hydrographer, PLA
Founded in 1878 in Paris, the Federation International des Geometres (FIG) is an international umbrella organisation for national surveying associations which covers all disciplines of the surveying profession. Commission 4 (Hydrography) has been active since 1968 and the new Chairman, Adam Greenland, Deputy Port Hydrographer at the Port of London Authority (PLA) agreed to be interviewed to enlighten our readers on the activities and importance of Commission 4. Can you give our readers a summary of your hydrographic involvement and career? Following a brief sea-going career, I studied Surveying and Mapping Sciences at the NE London Polytechnic. After graduating I... (read more)
2008-01-01 01:00:00

Marine SDI

Introducing Spatial Data Infrastructures
Global warming, climate change, rising sea levels and increased commercial exploitation of the seabed and sea space are important global indicators of a changing world environment. A crucial role is played by hydrographic and oceanographic spatial data in supporting response. Accurate and timely base reference information minimally comprises seabed topography and characterisation to which temporal information such as wave, tide and current can be referenced. In order to provide a complete picture, information held by HOs, National Mapping Agencies (NMAs), geologists, biologists and oceanographers can be brought together to provide solutions through enabling frameworks known as Spatial Data Infrastructures (SDIs).... (read more)
2007-07-13 12:00:00

Offshore Environmental Surveys

Introduction to UK Legislation and Guidelines
This is a brief introduction to UK offshore marine environmental survey legislation and guidelines, written from a fairly narrow perspective: that of a contractor providing such survey services to the oil & gas industry. Legislation requires environmental surveys of the North Sea but the extent and definition of these is open to interpretation, with quite a variety of standards and guidelines to choose from or ignore. Legal FrameworkUK environmental legislation transposes European Community (EC) directives on the environment. The prime EC directives are Council Directive 92/43 ‘on the Conservation of Natural Habitats and of Wild Fauna and Flora’ (‘the Habitats... (read more)
2007-05-09 12:00:00

Lines in the Sea

Maritime Boundary Delimitation
Under the 1982 United Nations Convention on the Law of the Sea (UNCLOS) coastal states may claim rights over the resources of the sea and seabed up to 200 nautical miles (M) from their coasts, and seabed jurisdiction out to 350M where the continental margin is wider than 200M. But many boundaries are ill defined and even disputed. With the oil and gas industry operating in ever-deeper waters, the need for geodetically precise maritime boundaries has become increasingly pressing. This article explores the challenges involved. More than 30% of the world’s oceans now fall under state jurisdiction, with overlapping maritime... (read more)
2007-04-04 12:00:00
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