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U.S. Law Of The Sea Cruise To Map The Foot Of The Slope And 2500-M Isobath Of The Northeast Us Atlantic Continental Margin: Legs 1, 2 And 3. Cruise Report, James V. Gardner

Center for Coastal and Ocean Mapping

U.S. Law of the Sea cruise to map the foot of the slope and 2500-m isobath of the Northeast US Atlantic continental margin: Legs 1,2 and 3

CRUISES H04-1, 2 and 3

August 23, to November 30, 2004

Gulfport, MS to Norfolk, VA

Deep-Sea Image Processing, Yuri Rzhanov, Larry A. Mayer, D J. Fornari

Center for Coastal and Ocean Mapping

High-resolution seafloor mapping often requires optical methods of sensing, to confirm interpretations made from sonar data. Optical digital imagery of seafloor sites can now provide very high resolution and also provides additional cues, such as color information for sediments, biota and divers rock types. During the cruise AT11-7 of the Woods Hole Oceanographic Institution (WHOI) vessel R/V Atlantis (February 2004, East Pacific Rise) visual imagery was acquired from three sources: (1) a digital still down-looking camera mounted on the submersible Alvin, (2) observer-operated 1-and 3-chip video cameras with tilt and pan capabilities mounted on the front of Alvin, and (3) …

Variable Bandwidth Filter For Multibeam Echo-Sounding Bottom Detection, Barbara J. Kraft, Christian De Moustier

Center for Coastal and Ocean Mapping

The accuracy of a seafloor map derived from multibeam swath bathymetry depends first and foremost on the quality of the bottom detection process that yields estimates of the arrival time and angle of bottom echoes received in each beam. Filtering of each beam with a fixed bandwidth filter, with the bandwidth based on the length of the transmitted pulse, reduces the error associated with the time-angle estimates. However, filters of this type can not be optimal over the wide range of operational environments encountered. Better results are obtained with a processing scheme that varies the filter bandwidth across the swath …

The Next Edition Of Iho-S-57 (4.0): A Primer, Lee Alexander

Center for Coastal and Ocean Mapping

The International Hydrographic Organization (IHO) is an intergovernmental consultative and technical organization that was established in 1921 to support the safety of navigation and the protection of the marine environment. IHO Special Publication 57 (IHO S-57) is the IHO Transfer Standard for Digital Hydrographic Data. It is the standard to be used for the exchange of digital hydrographic data between hydrographic offices (HOs), and for the distribution of hydrographic data to manufacturers, mariners and other data users (e.g., GIS). It was developed so that the transfer all forms of hydrographic data would take place in a consistent and uniform manner. …

Measurement Of In Situ Acoustic Properties For The Onr Geoclutter Program, Larry A. Mayer, Barbara J. Kraft, Luciano E. Fonseca

Center for Coastal and Ocean Mapping

No abstract provided.

Investigations For Ergonomic Presentation Of Ais Symbols For Ecdis, Florian Motz, Heino Widdel, Parry Oei, Scott Mackinnon, Lee Alexander

Center for Coastal and Ocean Mapping

Empirical investigations were carried out in a research project for the German Federal Ministry of Transport, Building, and Housing to evaluate the presentation of AIS target information on ECDIS. The investigations were performed at three international simulation centres. The features, colour and fillingjsize of AIS symbols, as well as the influence of the ECDIS display category on the detection of AIS targets were the main issues of the investigations. Results show that blue (5-52 colour token RE5BL) is the most suitable colour of the tested colours for the presentation of AIS targets under all ambient light conditions on the tested …

Enc Distribution Options Based On Wend, Lee Alexander

Center for Coastal and Ocean Mapping

The electronic chart is a new technology capable of continuously determining a vessel's position in relation to land, charted objects, aids-to-navigation, and unseen hazards. As a real-time navigation system, electronic charting provides significant benefits in terms of improvements in navigation safety, efficiency of maritime transportation, and marine environmental protection.

In terms of system components, features and functional capability, there are two basic types of electronic charts. The most advanced form is an Electronic Chart Display and Information System (ECDIS). All other types can be regarded, generically, as Electronic Chart Systems (ECS). For an electronic chart to be considered an ECDIS, …

Haptic Gdraw: A Fun And Easy To Use 3d Haptically Enhanced Sculpting Program, Rick Komerska, Colin Ware

Center for Coastal and Ocean Mapping

We have developed a simple haptically-enhanced 3D sculpting application which utilizes Hermite spline-based primitives as building blocks to construct more complex solid models. To accomplish this, we have constructed a VR work environment which is intuitive and whose control affordances are made clear through the use of graspable handles. Haptics is used to support handle selection and provide physical constraints on handle movements consistent with their visual affordances. Our goal is to demonstrate how relatively simple haptic force constraints can combine with a visually intuitive and compelling environment to enable a program that is fun and easy to use.

Visualizing The Geology Of Lake Trout Spawning Sites: Northern Lake Michigan, Peter Dartnell, Peter Barnes, James V. Gardner, Kristen Lee

Center for Coastal and Ocean Mapping

Geologists and biologists are working together to understand the links between lake floor geology (composition and shape) and the distribution of lake trout throughout their life cycle. Lake floor geology is one of the main factors determining where lake trout spawn, feed, and hide. In support of ongoing research to study Lake Michigan trout habitats, the U.S. Geological Survey in cooperation with the U.S. Army Corps of Engineers mapped the morphology of principle lake trout spawning sites. Using the Army Corps of Engineer's SHOALS airborne lidar (Light Detection and Ranging) system we mapped six regions in Northern Lake Michigan in …

On The Uncertainty Of Archive Hydrographic Datasets, Brian R. Calder

Center for Coastal and Ocean Mapping

As the international hydrographic community continues to address the question of the irreducible uncertainty in modern surveys, we must ask how we do the same with archived Vertical Beam Echosounder (VBES) and leadline datasets. The ONR funded Strataform project surveyed an area of the New Jersey shelf around 39◦12’N 72◦50’W using an EM1000 Multibeam Echosounder (MBES). This area is also covered by NOAA surveys from 1936- 38 (assumed to be leadline) and 1975-76 (VBES). By comparison of the archival soundings to the MBES data, estimates of measurement error for the archival surveys are constructed as a function of depth. The …

Inland Ecdis Development And Standardization, Lee Alexander

Center for Coastal and Ocean Mapping

Report on the work undertaken and progress made since CHRIS15 on developing and standardizing Inland ECDIS through North American and European collaboration, and future plans

View Direction, Surface Orientation And Texture Orientation For Perception Of Surface Shape, Colin Ware, Graeme Sweet

Center for Coastal and Ocean Mapping

Textures are commonly used to enhance the representation of shape in non-photorealistic rendering applications such as medical drawings. Textures that have elongated linear elements appear to be superior to random textures in that they can, by the way they conform to the surface, reveal the surface shape. We observe that shape following hache marks commonly used in cartography and copper-plate illustration are locally similar to the effect of the lines that can be generated by the intersection of a set of parallel planes with a surface. We use this as a basis for investigating the relationships between view direction, texture …

Quantitative Inter-Channel Calibration Of Shoals Signals For Consistent Bottom Segmentation And Characterization, Semme J. Dijkstra, G. Elston

Center for Coastal and Ocean Mapping

No abstract provided.

Report On Open Ecdis Forum (Oef) Activities, Lee Alexander

Center for Coastal and Ocean Mapping

No abstract provided.

Integrated Navigation System: Not A Sum Of Its Parts, Lee Alexander, Joseph F. Ryan Capt., Michael J. Casey

Center for Coastal and Ocean Mapping

Similar to the evolutionary process for living organisms, marine navigation systems are becoming increasingly complex and sophisticated. Both by design and function, shipboard and shore-based navigation systems are no longer individual equipment components operating independently. Instead, the trend is toward integration, data fusion and synergy. One example of this are new Performance Standards being considered by IMO to achieve a “harmonized” presentation of all navigation-related information on the display of an integrated navigation system (INS). Unlike a dedicated display for ECDIS or radar, the new INS displays will be a task-oriented composite presentations that enable the mariner to configure the …

A Time Comparison Of Computer-Assisted And Manual Bathymetric Processing, Brian R. Calder, Shep Smith

Center for Coastal and Ocean Mapping

We describe an experiment designed to determine the time required to process Multibeam Echosounder (MBES) data using the CUBE (Combined Uncertainty and Bathymetry Estimator) [Calder & Mayer, 2003; Calder, 2003] and Navigation Surface [Smith et al., 2002; Smith, 2003] algorithms. We collected data for a small (22.3xl06 soundings) survey in Valdez Narrows, Alaska, and monitored person-hours expended on processing for a traditional MBES processing stream and the proposed computer-assisted method operating on identical data. The analysis shows that the vast majority of time expended in a traditional processing stream is in subjective hand-editing of data, followed by line planning and …

U.S. Law Of The Sea Cruise To Map The Foot Of The Slope And 2500-M Isobath Of The U.S. Arctic Ocean Margin, Barrow To Barrow. Cruise Report, Larry A. Mayer

Center for Coastal and Ocean Mapping

U.S. Law of the Sea cruise to map the foot of the slope and 2500-m isobath of the US Arctic Ocean margin

CRUISES HE-0302

August 30 to September 11, 2003

Barrow, AK to Barrow, AK