OpenStreetMap (OSM) is a collaborative project to create a free editable geographic database of the world. The geodata underlying the maps is considered the primary output of the OSM project. The creation and growth of OSM has been motivated by restrictions on use or availability of map data across much of the world, and the advent of inexpensive portable satellite navigation devices. EMODnet bathymetry considers OSM to be the best source for land data to complement the marine environment and to allow easier navigation in the data portal. OpenStreetMap is a free and noncommercial project; everyone can just download OpenStreetMap data free of charge and process it. However EMODnet Bathymetry requires a tailored rendering of OpenStreetMap data as in all standard available visualisations the world oceans are obscured by water features which have no use in a marine environment. In addition, EMODnet requires a non-projected rendering with no land use which is not the OSM render default. The OSM rendering is provided to EMODnet by the German company Geofabrik (www.geofabrik.de).

The EMODnet Bathymetry World Coastline is available as a WFS service from EMODnet Bathymetry. The service URL is: https://ows.emodnet-bathymetry.eu/wfs. The layer contains vector lines derived from land polygons available from OpenStreetMap. The original source url is https://osmdata.openstreetmap.de/. Parts of these polygons have been modified for use in EMODnet Bathymetry. In addition to the OSM EMODnet default coastline, three sub-layers are available as part of the EMODnet world coastline service. These sub-layers contain the best-estimate coastlines for Europe determined by Dutch research institute Deltares from satellite data (typically Sentinel-2 and Landsat-8) and in combination with the Global Tide Surge Model (GTSM) processed into digital coastlines for the European seas at LAT (Lowest Astronomical Tide), MSL (Mean-Sea-Level), and MHW (Mean-High-Water). The level of detail is bound to the resolution of the satellite sensor (e.g. 10m for Sentinel-2). The latest December 2022 version covers the entire coastline of Europe and now also part of the Caribbean. A detailed paper is available describing the methodology used to determine the three versions of the satellite derived coastline: https://emodnet.ec.europa.eu/sites/emodnet.ec.europa.eu/files/public/EMODnet-Bathymetry_2022_satellite_derived_coastlines_Deltares-Feb2023.pdf

The National Base Map service provides seamless topographic colour mapping for the whole of Australia, including the outer islands of Norfolk, Lord Howe & Macquarie Islands, the external territories …Show full descriptionThe National Base Map service provides seamless topographic colour mapping for the whole of Australia, including the outer islands of Norfolk, Lord Howe & Macquarie Islands, the external territories of Cocos (Keeling), Christmas, Heard and McDonald Islands and the Australian Antarctic Territory. The service consists of data sourced from Geoscience Australia, Australian Antarctic Division & OpenStreetMap. The data for Christmas Island has been sourced from the Christmas Island Edition 1 NATMAP Topographic Mapping dataset (1:30,000 scale). The data for Cocos (Keeling) Islands has been sourced from the Cocos (Keeling) Islands Edition 1 NATMAP Topographic Mapping dataset (1:25,000 scale). Vegetaion for the the Australian continent is an aggregated layer from ACLUMP (Australian Collaborative Land Use and Management Program). The topographic information was checked in 2008 using satellite imagery, and supplemented using other sources in 2009. Limited field checking has been undertaken for these data and therefore some information may not be accurate. Information and assistance was supplied by the Attorney General's Department (Territories of Australia) and Department of Environment, Water, Heritage and the Arts (Parks Australia). Geoscience Australia gratefully acknowledges contibutions to data content.) When viewing the map of mainland Australia beyond 1:100,000 scale, the data is derived from the Geoscience Australia GEODATA TOPO 250K product, except roads which are OpenStreetMap data, and in from 1:100,000 scale the data is derived from OpenStreetMap data ( © OpenStreetMap contributors). The suburbs layer is sourced from the Suburb 2018 and 2020 data, Australian Bureau of Statistics. The map portrays detailed graphic representations of features that appear on the Earth's surface. These features include cultural, hydrography, marine, transport, vegetation and relief themes. The SRTM data was acquired by NASA in February 2000 and was publicly released under Creative Commons licensing from November 2011 in ESRI Grid format. The SRTM DEM has quite different characteristics to DEMs derived by interpolation from topographic data. The SRTM data is derived from radar measurements that are dense (there is essentially a measurement at almost every grid cell) but noisy. The main processing of the SRTM DEM product has included: stripe removal, void filling and vegetation offset removal. Processing methods are further described in the 1 and 3 second SRTM Derived Products User Guide (Geoscience Australia, 2011). The bathymetry image used for this map is sourced from Natural Earth. Free vector and raster map data @ naturalearthdata.com.