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Articles 1 - 10 of 10
Full-Text Articles in Physical Sciences and Mathematics
Development Of A Geo-Spatial Analysis Methodology For Assessing The Adequacy Of Hydrographic Surveying And Nautical Charts, Chukwuma Azuike, Shachak Pe'eri, Lee Alexander, Christopher Parrish, Andy Armstrong
Development Of A Geo-Spatial Analysis Methodology For Assessing The Adequacy Of Hydrographic Surveying And Nautical Charts, Chukwuma Azuike, Shachak Pe'eri, Lee Alexander, Christopher Parrish, Andy Armstrong
Center for Coastal and Ocean Mapping
IHO Publication C-55 (Status of Hydrographic Surveying and Nautical Charting Worldwide) contains information about the progress of hydrographic surveying and nautical charting for a country with navigable waters under its jurisdiction. Listed primarily as percent coverage, it is difficult to use this information to determine: 1) if the current level of surveying or charting is adequate or in need of action, or 2) can be used to compare different locations. An analysis and assessment methodology has been developed to assess the adequacy hydrographic surveying and nautical charting coverage. Indications of chart adequacy and completeness as depicted on current charts or …
Beyond The Chart: The Use Of Satellite Remote Sensing For Assessing The Adequacy And Completeness Information, Shachak Pe'eri, Chukwuma Azuike, Lee Alexander, Christopher Parrish, Andy Armstrong
Beyond The Chart: The Use Of Satellite Remote Sensing For Assessing The Adequacy And Completeness Information, Shachak Pe'eri, Chukwuma Azuike, Lee Alexander, Christopher Parrish, Andy Armstrong
Center for Coastal and Ocean Mapping
Chart adequacy and completeness information consists of the symbols, abbreviations and warnings used to inform mariners of the level of confidence that should be given to data on a nautical chart. This information is derived both from the nautical chart and sailing directions. However, analysis based solely on these datasets is limited without access to the sources (e.g., smooth sheets). Publically-available, multi-spectral satellite imagery and published algorithms can be used to derive estimates of the relative bathymetry in shallow, clear waters. In this study, we evaluate the potential of these methods for supplementing the procedure to assess the adequacy of …
The Port Norfolk Project: Improved Raster Navigation Products From High Resolution Source Data, Matt Wilson, James J. Miller, Vanessa Self Miller, Kolleen Mortimer, Katrina Wyllie
The Port Norfolk Project: Improved Raster Navigation Products From High Resolution Source Data, Matt Wilson, James J. Miller, Vanessa Self Miller, Kolleen Mortimer, Katrina Wyllie
Center for Coastal and Ocean Mapping
With increasing capabilities in technology, modern hydrographic surveys are comprised of similarly increasing amounts of data, only a minute fraction of which is currently available in the nautical charts produced by the NOAA Office of Coast Survey (OCS). Simultaneously, a tremendous amount of effort goes into the generalization and optimal cartographic representation of the hydrographic data onto raster products, from which the vector products are digitized. Preserving and maintaining a single database of high-resolution vector source data will retain— and make accessible—much more of the hydrographic data collected, alleviate the burden of generalization, and would allow for delivery of high-resolution …
Enhancing Ais To Improve Whale-Ship Collision Avoidance And Maritime Security, Philip A. Mcgillivary, Kurt Schwehr, Kevin Fall
Enhancing Ais To Improve Whale-Ship Collision Avoidance And Maritime Security, Philip A. Mcgillivary, Kurt Schwehr, Kevin Fall
Center for Coastal and Ocean Mapping
Whale-ship strikes are of growing worldwide concern due to the steady growth of commercial shipping. Improving the current situation involves the creation of a communication capability allowing whale position information to be estimated and exchanged among vessels and other observation assets. An early example of such a system has been implemented for the shipping lane approaches to the harbor of Boston, Massachusetts where ship traffic transits areas of the Stellwagen Bank National Marine Sanctuary frequently used by whales. It uses the Automated Identification Systems (AIS) technology, currently required for larger vessels but becoming more common in all classes of vessels. …
Minimizing Vessel Strikes To Endangered Whales: A Crash Course In Conservation Science And Policy, David N. Wiley, Moira W. Brown
Minimizing Vessel Strikes To Endangered Whales: A Crash Course In Conservation Science And Policy, David N. Wiley, Moira W. Brown
Center for Coastal and Ocean Mapping
The North Atlantic right whale is one of the most endangered of all large whales: about 350-400 individuals remain. Species recovery is, in part, contingent on reducing vessel-strike mortality. Our science-based conservation program resulted in three efforts specifically designed to minimize the risk of lethal vessel-strikes of endangered baleen whales without compromising vessel navigation and safety. In Atlantic Canada, the Bay of Fundy Traffic Separation Scheme (TSS) was relocated to reduce the risk of lethal vessel strikes by 90% where the original outbound lane of the TSS intersected the Right Whale Conservation Area, and an Area To Be Avoided (ATBA) …
Environmental Response Management Application (Erma) - Web-Based Gis Data Display And Management System For Oil Spill Planning And Environmental Response, Michele Jacobi, Rob Braswell, Amy A. Merten, Nancy E. Kinner, Kurt Schwehr
Environmental Response Management Application (Erma) - Web-Based Gis Data Display And Management System For Oil Spill Planning And Environmental Response, Michele Jacobi, Rob Braswell, Amy A. Merten, Nancy E. Kinner, Kurt Schwehr
Center for Coastal and Ocean Mapping
NOAA’s Office of Response and Restoration (ORR) in a partnership with the University of New Hampshire Coastal Response Research Center (CRRC), is leading an effort to develop an Open Source GIS system that is accessible to both the command post and to assets in the field during a response. The ERMA (Environmental Response Management Application) system is an integrated data management platform that uses MapServer and Open Layers software to combine real-time and static regional geospatial data sets. Data available include: weather and forecasts, ESI maps, IOOS buoys, modeled spill trajectories, real-time tracks of vessels, response plans, navigational charts, bathymetry, …
Right Whale Ais Project (Rap): Acoustic Detections In The Boston Approaches, Kurt Schwehr, Lee Alexander
Right Whale Ais Project (Rap): Acoustic Detections In The Boston Approaches, Kurt Schwehr, Lee Alexander
Center for Coastal and Ocean Mapping
No abstract provided.
Geocoastpilot: Linking The Coast Pilot With Geo-Referenced Imagery & Chart Information, Kurt Schwehr, Matthew D. Plumlee, Briana M. Sullivan, Colin Ware
Geocoastpilot: Linking The Coast Pilot With Geo-Referenced Imagery & Chart Information, Kurt Schwehr, Matthew D. Plumlee, Briana M. Sullivan, Colin Ware
Center for Coastal and Ocean Mapping
No abstract provided.
Google Earth Visualizations: Preview And Delivery Of Hydrographic And Other Marine Datasets, Kurt Schwehr, Briana M. Sullivan, James V. Gardner
Google Earth Visualizations: Preview And Delivery Of Hydrographic And Other Marine Datasets, Kurt Schwehr, Briana M. Sullivan, James V. Gardner
Center for Coastal and Ocean Mapping
Existing hydrographic data analysis and visualization tools are very powerful, but lack easy access to web data management tools. Virtual globe software provides a gateway to a host of important data products in formats usable by specialized tools such as CARIS, Fledermaus, and Arc/Info. With virtual globe interfaces, users see complimentary and consistent geographic representations of available data in an easy-tonavigate format. We present a preview of visualizations that build upon virtual globe software. These examples are viewed in Google Earth, but could also be implemented in a number of alternative programs (e.g. NASA World Wind, Dapple, OSSIM Planet). We …
Proposed Ais Binary Message Format Using Xml For Providing Hydrographic-Related Information, Schwehr Kurt, Lee Alexander
Proposed Ais Binary Message Format Using Xml For Providing Hydrographic-Related Information, Schwehr Kurt, Lee Alexander
Center for Coastal and Ocean Mapping
UNH is working with the USCG and NOAA to use XML (Extensible Markup Language) to define binary messages for maritime-based AIS (Automatic Identification System). A draft specification format is under development that will enable hydrographic and maritime safety agencies to encode AIS message contents by providing a bit-level description in XML (informally known the "AIS Binary Message Decoder Ring"). An AIS binary message definition in XML specifies the order, length, and type of fields following a subset of that used by the ITU-R.M.1371-1. The specification is independent of programming language (e.g., can be implemented in C, C++, C#, Java, Python, …