![]() Details regarding these datasets are provided in Halcrow (2012).Ģ.2.2.1 General Bathymetric Chart of the Oceans ( GEBCO) Three existing coarse resolution bathymetry data sets were identified which cover the study area: the GEBCO_08, the ETOPO-1 grid and the EMODnet grid. The GSHHS data are considered appropriate for use in areas where the model resolution is coarse, the OS vector map district MHWS line should be used in areas of higher resolution, such as for the Pentland Firth and Orkney Waters. These are at higher spatial resolution than the GSHHS shoreline dataset. The Ordnance Survey ( OS) Vector Map District contains tidal boundary polylines, which are at Mean High Water Spring level ( MHWS) in Scotland and MHW in England and Wales. The GSHHS coastlines have been data processed to ensure they are free of internal inconsistencies such as erratic points and crossing segments. For the UK, the best resolution available is the World Vector Shoreline ( WVS), designed to be used at a resolution of 1:250,000. ![]() The GSHHS coastline comes in different resolutions. Some reference has also been made to coastline data from the US National Geophysical Data Centre, Marine Geology & Geophysics Division ( MGGD), for the whole NW European Shelf model. Two coastline data sets were obtained for use in this study: the Global Self-consistent, Hierarchical, High-resolution Shoreline ( GSHHS) distributed by National Geophysical Data Centre ( NGDC) in the US, and Ordnance Survey Mapping. Note that the proposed model domains shown in this section are not the final model domains but an approximation. Where appropriate reference is made to the overall project data review report (Halcrow, 2012). ![]() This section of the report describes the data collated/identified for the Scottish Shelf Waters ( SSW) model area.
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