| 词条 | Navigation surface |
| 释义 |
In hydrography, the Navigation Surface paradigm represents an alternative to traditional approaches to manage bathymetric data by creating bathymetric databases that can be used to generate high-resolution navigation aids and other applications.[1] The paradigm also provides methods to manipulate the data to create products for various applications (e.g., thematic maps for marine geology,acoustic seabed classification and marine biology).{{citation needed|date= June 2018}} HistoryRecent technological developments in hydrography (e.g., large adoption of multibeam echosounder and electronic navigational charts) have pushed hydrographic organizations to adopt a new production paradigm centered on gridded surfaces rather than sounding-based workflow and products.[2] Based on such a shift, the concept of navigation surface was introduced in 2003 to provide a seafloor model at the best resolution that the data support. Depth values for nautical charting are then derived by generalization of the available gridded surfaces. In addition, a quality assessment for each grid node of the navigation surface is created through an uncertainty layer.[1] The Open Navigation Surface (ONS) project designed a free, open-source code library to manage (read/write) the information required to create a Navigation Surface. The implementation of these requirements is represented by the Bathymetric Attributed Grid data format.[3] The US Navy has implemented a global navigation surface database using an infrastructure called DBDB-NV.[2] References1. ^1 {{cite thesis|type=Masters|title=The Navigation Surface: A Multipurpose Bathymetric Database|last1=Smith|first1=Shepard|date=2003|publisher=University of New Hampshire |url=http://ccom.unh.edu/publications/navigation-surface-multipurpose-bathymetric-database |location=Durham, NH|pages=|accessdate=16 June 2018}} {{ocean-stub}}{{measurement-stub}}2. ^1 {{cite journal |last1=Titley |first1=David |title=Implementation of Navigation Surface |journal=Hydro International |date=26 June 2009 |url=https://www.hydro-international.com/content/article/implementation-of-navigation-surface |accessdate=17 June 2018}} 3. ^{{cite web |title=The Open Navigation Surface project |url=http://www.opennavsurf.org/index.html |accessdate=16 June 2018}} 1 : Topography techniques |
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