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    Wyświetlanie 1-5 z 5
    Tytuł:
    Towards a Universal Hydrographic Data Model
    Autorzy:
    Astle, H.
    Schwarzberg, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/117428.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    International Hydrographic Organization (IHO)
    GIS Technology
    geographic information system (GIS)
    Maritime Applications
    IHO Transfer Standard for Digital Hydrographic Data S-57 Hydrographic Offices
    Universal Hydrographic Data Model (UHDM)
    IHO S-100
    Opis:
    The International Hydrographic Organization’s (IHO) [1] Transfer Standard for Digital Hydrographic Data S-57 [2] standard has been in force for more than a decade, and has successfully been used for official ENCs adopted by Hydrographic Offices around the world and by navigation equipment manufacturers. Additionally S-57 has been used for many additional purposes. However S-57, and especially the administration of the standard, has also experienced limitations. In 2010, IHO released the next generation hydrographic standard called S-100 Universal Hydrographic Data Model [3]. A move that will open up the door to new possibilities to existing S-57 users and potentially broaden the use of IHO standards in the hydrographic community. This paper will try to explain why an S-57 replacement was needed and give examples on some possibilities with S-100 and its derived product specifications such as S-101.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 4; 567-571
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Proposal of new data structures for the management of the multilayer seabed DTM
    Autorzy:
    Maleika, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/360391.pdf
    Data publikacji:
    2014
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    multilayer DTM
    sea bottom modelling
    grid
    modelling accuracy
    hydrographic data processing
    Opis:
    The paper contains a proposal of developing new data structures, which would describe a digital terrain model (DTM). The essential characteristic of of the proposed design is the fact, that they consist of multiple layers, where each layer describes the same, but with different accuracy (density point), and the whole structure describes a selected seabed area. Using such a novel data structure will allow for creating seabed models incorporating data of varying accuracy, and the particular layers might be used for specific purposes (e.g. low density data for quick visualisation, medium density data for general calculations, high density data for analysis small objects on the seabed). The author describes the assumptions underlying the development of such a structure, its functionality, possible applications and properties, as well as the outline of planned research regarding the structure.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2014, 38 (110); 75-80
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Increases in the temperature and salinity of deep and intermediate waters in the West Spitsbergen Current region in 1997–2016
    Autorzy:
    Merchel, M.
    Walczowski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/2079090.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    climate change
    deep water
    temperature
    salinity
    intermediate water
    West Spitsbergen current
    hydrographic data
    Opis:
    This study investigated the temporal variability in the basic physical properties of deep and intermediate waters in the West Spitsbergen Current region at 76°30’N latitude from 1997 to 2016. Emphasis was placed on quantifying the changes in temperature and salinity and determining the potential drivers of these changes. Hydrographic data were obtained during annual summer cruises aboard the r/v Oceania in the Nordic Seas. The increase in the water temperature, which was especially strong in the western part of the investigated section, was associated with considerable changes in the water layers salinity. The temperature and salinity of the intermediate water increased much faster (0.021°C yr−1 and 0.0022 yr−1, respectively) than those of the deep water (0.009°C yr−1 and 0.0004 yr−1, respectively). The warming rate in the upper 2000 m was also higher than the mean warming rate of the global ocean. The source of the deep water temperature and salinity increases was the deep water inflow from the Arctic Ocean into the Greenland Sea. In contrast, the increase in these properties in the intermediate water was associated with the advection of warmer and more saline Atlantic Water from the North Atlantic to the Nordic Seas.
    Źródło:
    Oceanologia; 2020, 62, 4PA; 501-510
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Meteorological influences on the surface hydrographic patterns of the North Aegean Sea
    Autorzy:
    Sylaios, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/48232.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    water mass
    Baltic Sea
    Aegean Sea
    sea water
    hydrographic data
    wind stress
    bottom topography
    meteorological influence
    hydrographic pattern
    Anthos Peninsula
    salinity
    Opis:
    Hydrographic data from the North Aegean Sea were used to examine the summer variability of surface water masses during the period 1998–2001. Attention was placed on the surface hydrographic features of the area, such as the Black Sea Water (BSW) plume expansion, the frontal characteristics of the BSW with the Levantine Intermediate Water (LIW) and the variability of submesoscale hydrographic features (such as the Samothraki Anticyclone). Strong southerly wind stresses were found responsible for relaxing the horizontal density gradients across the BSW-LIW frontal zone and displacing this front to the north of Lemnos Island, thus suppressing the Samothraki Anticyclone towards the Thracian Sea continental shelf. Under northerly winds, the BSW-LIWfront returns to its regular position (south of Lemnos Island), thus allowing the horizontal expansion of the Samothraki gyre up to the Athos Peninsula. Present results indicate the importance of medium-term wind stress effects on the generation of Samothraki Anticyclone suppression/expansion events.
    Źródło:
    Oceanologia; 2011, 53, 1
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geostrophic current patterns off the Egyptian Mediterranean coast
    Autorzy:
    Kamel, M.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/48462.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    geostrophic current circulation
    hydrographic data
    Egyptian Mediterranean coast
    Salum Bay
    Egypt
    Nile Delta
    Port Said
    nearshore area
    water mass
    surface water
    salinity
    oxygen content
    Opis:
    Using objectively analysed hydrographic data, currents have been calculated off the Egyptian Mediterranean coast at the surface and at 30, 50, 75, 100, 200 and 300 m depths for the four seasons. The surface circulation is dominated by an anticyclonic circulation off Salum Bay in winter, spring and summer. In nearshore areas, the current flows eastwards at the shallower levels but westwards at the deeper levels. Off the Nile Delta, the current is almost eastward with a higher velocity in summer and autumn, while in spring it is very weak. Off the area between Port Said and Rafah, there is a clear cyclonic circulation appearing in all seasons except winter. At 50 and 75 m depth, the velocity of the circulation is weak. At 100 m depth, the circulation that appeared between Matruh and Alamen in summer decreases in area and magnitude at the former depths. At 200 and 300 m in winter, the current velocity is quite low. In spring the current flows southwards off the area between Rafah and Port Said. In summer, the current off the area between Port Said and Rafah is quite strong and flows to the south. The situation in autumn is quite similar to that in summer, except in the eastern area, where the current is a westward one.
    Źródło:
    Oceanologia; 2010, 52, 2; 299-310
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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