The US territorial sea is a maritime zone, over which the United States exercises sovereignty. Each coastal State claims a territorial sea that extends seaward up to 12 nautical miles from its coastal baseline. As defined by maritime law, the coastal State exercises sovereignty over its territorial sea, the air space above it, and the seabed and subsoil beneath it. The U.S. territorial sea extends 12 nautical miles from the coastal baseline. The zone is usually used in concert with several other Limits and Boundary Lines for Maritime purposes.Maritime limits for the United States are measured from the US baseline, which is recognized as the low-water line along the coast as marked on NOAA's nautical charts. The baseline and related maritime limits are reviewed and approved by the interagency US Baseline Committee. The Office of Coast Survey depicts on its nautical charts the territorial sea (12nm), contiguous zone (24nm), and exclusive economic zone (200nm, plus maritime boundaries with adjacent/opposite countries. US maritime limits are ambulatory and subject to revision based on accretion or erosion of the charted low water line. Dataset SummaryThis map service contains data from NOAA and BOEM sources that address USA Regional coastal areas and are designed to be used together within an ArcGIS.com web map. These include: World Exclusive Economic Zone (EEZ) from NOAA Office of Coast SurveyContiguous Zone (CZ) from NOAA Office of Coast SurveyTerritorial Sea (TS) Boundary from NOAA Office of Coast SurveyRevenue Sharing Boundary [Section 8(g) of OCSLA Zone Boundary] from Bureau of Ocean Energy Management (BOEM)Submerged Land Act Boundaries (SLA) aka State Seaward Boundary (SSB)State Administrative Boundary from Bureau of Ocean Energy Management (BOEM)Continental Shelf Boundary (CSB) from Bureau of Ocean Energy Management (BOEM)Regional Maritime Planning Area Boundaries from NOAA Office of Coast SurveyInternational Provisional Maritime Boundary from NOAA (International Boundary Commission)The data for this layer were obtained from MarineCadastre.gov and is updated regularly.More information about U.S. Maritime Limits and BoundariesLink to source metadataWhat can you do with this layer?The features in this layer are used for areas and limits of coastal planning areas, or offshore planning areas, applied within ArcGIS Desktop and ArcGIS Online. A depiction of the territorial sea boundaries helps disputing parties reach an agreement as in the case of one state's boundary overlapping with another state's territorial sea, in which case the border is taken as the median point between the states' baselines, unless the states in question agree otherwise. A state can also choose to claim a smaller territorial sea.Conflicts still occur whenever a coastal nation claims an entire gulf as its territorial waters while other nations only recognize the more restrictive definitions of the UN convention. Two recent conflicts occurred in the Gulf of Sidra where Libya has claimed the entire gulf as its territorial waters and the US has twice enforced freedom of navigation rights, in the 1981 and 1989 Gulf of Sidra incidents.This layer is a feature service, which means it can be used for visualization and analysis throughout the ArcGIS Platform. This layer is not editable.

An exclusive economic zone (EEZ) is a sea zone prescribed by the United Nations Convention on the Law of the Sea over which a sovereign state has special rights over the exploration and use of marine resources, including energy production from water and wind. This maritime boundary is designed to be used with other marine boundaries in order to help determine areas of trade, commerce and transportation. The 200 NM zone is measured, country-by-country, from another maritime boundary, the baseline (usually but not in all cases the mean low-water mark, used is not the same thing as the coast line. For each country, obtain the official list of the baseline points from the United Nations under Maritime Space.The exclusive economic zone stretches much further into sea than the territorial waters, which end at 12 NM (22 km) from the coastal baseline (if following the rules set out in the UN Convention on the Law of the Sea). Thus, the EEZ includes the contiguous zone. States also have rights to the seabed of what is called the continental shelf up to 350 NM (648 km) from the coastal baseline, beyond the EEZ, but such areas are not part of their EEZ. The legal definition of the continental shelf does not directly correspond to the geological meaning of the term, as it also includes the continental rise and slope, and the entire seabed within the EEZ. The chart below diagrams the overlapping jurisdictions which are part of the EEZ. When the (EEZ) boundary is between countries which are separated by less than 200NM is settled by international tribunals at any arbitrary line. Many countries are still in the process of extending their EEZs beyond 200NM using criteria defined in the United Nations Convention on the Law of the Sea. Dataset Summary The data for this layer were obtained from https://www.marineregions.org/published here. Link to source metadata.Preferred Citation: Flanders Marine Institute (2023). Maritime Boundaries Geodatabase: Maritime Boundaries and Exclusive Economic Zones (200NM), version 12. Available online at https://www.marineregions.org/. https://doi.org/10.14284/632This layer is a feature service, which means it can be used for visualization and analysis throughout the ArcGIS Platform. This layer is not editable.

This shapefile provides a worldwide geographic division by merging the World Continents division proposed by Esri Data and Maps (2024) to the Global Oceans and Seas version 1 division proposed by the Flanders Marine Institute (2021). Though divisions of continents and oceans/seas are available, the combination of both in a single shapefile is scarce.

The Continents and Oceans/Seas shapefile was carefully processed to remove overlaps between the inputs, and to fill gaps (i.e., areas with no information) by spatially joining these gaps to neighbour polygons. In total, the original world continents input divides land areas into 8 categories (Africa, Antarctica, Asia, Australia, Europe, North America, Oceania, and South America), while the original oceans/seas input divides the oceans/seas into 10 categories (Arctic Ocean, Baltic Sea, Indian Ocean, Mediterranean Region, North Atlantic Ocean, North Pacific Ocean, South Atlantic Ocean, South China and Easter Archipelagic Seas, South Pacific Ocean, and Southern Ocean). Therefore, the resulting world geographic division has 18 possible categories.

References

Esri Data and Maps (2024). World Continents. Available online at https://hub.arcgis.com/datasets/esri::world-continents/about. Accessed on 05 March 2024.

Flanders Marine Institute (2021). Global Oceans and Seas, version 1. Available online at https://www.marineregions.org/. https://doi.org/10.14284/542. Accessed on 04 March 2024.

The map is designed to be used as a basemap by marine GIS professionals and as a reference map by anyone interested in ocean data. The basemap focuses on bathymetry. It also includes inland waters and roads, overlaid on land cover and shaded relief imagery.

The International Map of the World (IMW) series is no longer maintained, and printed copies of this map are no longer available. The Australian portion of the series consists of 49 maps. They were produced to an international specification using the R502 series at 1:250,000 scale as source material. Production commenced in 1926 and was completed in 1978. The maps were revised from time to time and the last reprint was undertaken in 2003. Each standard map sheet covers 4 degrees of latitude by 6 degrees of longitude and was produced using a Lambert Conformal Conic projection with 2 standard parallels. The series has recently been superseded by the 1:1 000 000 topographic map general reference.

In June 2000 the Geological Survey of Ireland (GSI) under the auspices of the Department of Public Enterprise (later moved to the Department of Communications, Marine and Natural Resources in 2002) awarded a contract to Global Ocean Technologies Limited (GOTECH) to undertake the Irish National Seabed Survey (INSS), Zone 3 Hydrographic Survey. This area, of some 413,760 square Kilometres, stretches from the 200 metre water depth line on the Western Seaboard of Ireland, westward into the full oceanic depths of the Atlantic Ocean. The INSS mapped to approximately the 200m contour. The project was completed in 2006.The INFOMAR programme is a joint venture between Geological Survey Ireland (GSI) and Marine Institute (MI) and is the successor to the Irish National Seabed Survey. INFOMAR aims to survey the remaining shelf and coastal waters between 2006 to 2026.It is a vector dataset. Vector data portrays the world using points, lines and polygons (areas). The zone data is shown as polygons. Each polygon holds information on the zone number, zone part, area (km2) and perimeter (m).The United Nations Convention on the Law of the Sea (UNCLOS), also called the Law of the Sea Convention or the Law of the Sea Treaty, is an international agreement that establishes a legal framework for all marine and maritime activities. Articles 3 and 4 of UNCLOS sets out what a territorial sea is and what is permitted. Territorial sea, as defined by the 1982 United Nations Convention on the Law of the Sea (UNCLOS), is a belt of coastal waters extending at most 12 nautical miles (22 km; 14 mi) from the baseline (usually the mean low-water mark) of a coastal state. The territorial sea is regarded as the sovereign territory of the state, although foreign ships (military and civilian) are allowed innocent passage through it, or transit passage for straits; this sovereignty also extends to the airspace over and seabed below. Adjustment of these boundaries is called, in international law, maritime delimitation.A state's territorial sea extends up to 12 nm (22 km; 14 mi) from its baseline. A nautical mile is 1,852 metres. If this would overlap with another state's territorial sea, the border is taken as the median point between the states' baselines, unless the states in question agree otherwise. A state can also choose to claim a smaller territorial sea.It is a vector dataset. Vector data portrays the world using points, lines and polygons (areas). The data is shown as a line.The exclusive economic zone is an area beyond and adjacent to the territorial sea, subject to the specific legal regime established in this Part, under which the rights and jurisdiction of the coastal State and the rights and freedoms of other States are governed by the relevant provisions of this Convention. An exclusive economic zone, as prescribed by the 1982 United Nations Convention on the Law of the Sea, is an area of the sea in which a sovereign state has exclusive rights regarding the exploration and use of marine resources, including energy production from water and wind.It stretches from the outer limit of the territorial sea (22.224 Km or 12 NM from the baseline) out to a maximum of 370.4 Km (or 200 nautical miles) from the coast of the state in question. It is also referred to as a maritime continental margin and, in colloquial usage, may include the continental shelf. The term does not include either the territorial sea or the continental shelf beyond the 200 nautical mile limit. The difference between the territorial sea and the exclusive economic zone is that the first confers full sovereignty over the waters, whereas the second is merely a "sovereign right" which refers to the coastal state's rights below the surface of the sea. The surface waters are international waters.It is a vector dataset. Vector data portrays the world using points, lines and polygons (areas). The data is shown as a line.The United Nations Convention on the Law of the Sea (UNCLOS), also called the Law of the Sea Convention or the Law of the Sea Treaty, is an international agreement that establishes a legal framework for all marine and maritime activities. Article 76 of UNCLOS sets out the definition of what the continental shelf is and what is permitted. The Geoscience Regulatory Office (GSRO) (formerly Petroleum Affairs Division (PAD)) a division of the Department of the Environment, Climate and Communications (DECC) has statutory responsibility for Ireland’s Continental Shelf.A state wishing to extend its shelf beyond 200 nautical miles must make a submission to the Commission on the Limits of the Continental Shelf. Ireland’s continental shelf physically extends beyond 200 nautical miles to the west and south of the country and, working together, the Departments of Foreign Affairs and of the Environment, Climate and Communications have in all made three submissions to the Commission – in 2005 in relation to the Porcupine Abyssal Plain, then jointly with France, Spain and the UK for the seabed of the Celtic Sea and Bay of Biscay, and finally for the Hatton Rockall area of the North East Atlantic in 2009.The submission concerning the Porcupine Abyssal Plain successfully resulted in the addition of 39,000 km² of seabed to the State’s continental shelf. The Commission has also made recommendations that would enclose an area of approx. 80,000 km² of seabed in the Celtic Sea and Bay of Biscay and the division of this area is currently under negotiation between the four countries concerned. In addition, regular discussions have taken place for a number of years between Ireland and the UK (who agreed continental shelf boundaries in 1988), Iceland and the Faroe Islands in relation to overlapping claims in the North East Atlantic.It is a vector dataset. Vector data portrays the world using points, lines and polygons (areas). The data is shown as a line.

World Water Bodies provides a detailed basemap layer for the lakes, seas, oceans, large rivers, and dry salt flats of the world.

World Water Bodies represents the open water rivers, lakes, dry salt flats, seas, and oceans of the world.For complete hydrographic coverage, use this dataset in conjunction with the World Linear Water dataset.

Global Fishing Watch's datasets leverage satellite technology and machine learning to map and monitor industrial activities across global waters. These datasets aim to increase transparency in ocean use, improve maritime governance, and support marine conservation by providing detailed insights into offshore infrastructure and maritime activities.

This polygon shapefile represents areas of inland water in Nepal. This layer is part of Global Map version 2. The drainage and Transportation layers version 2 are prepared by using the digital 1:1000k data of nepal. The Global Map Nepal version 1.0 Boundaries layer was developed using The Digital Map 200000. Updating the data of version 1.0 using 1:500,000 District Map series and 1:1,000,000 International Map series developed the Global Map Nepal version 1.1 Boundary layer. Updating the Global Map Nepal version 1.1 using 1:1,000,000 Topographic Maps and other information developed the Global Map Nepal version 2.0 Boundary layer, which is corresponding to the merger of municipalities as of April 1, 2010. The Global Map Nepal version 1.0 Population center layer was developed using The 1:1,000,000 Chart International series. Updating the data of version 1.0 using The 1:500,000 District Map series and 1:1,000,000 International Map series developed the Global Map Nepal version 1.1 Population center layer. Updating the Global Map Nepal version 1.1 developed the Global Map Nepal version 2.0 Population center layer, which is corresponding to the merger of municipalities as of April 1, 2010. (Because the built-up area data of the Global Map Nepal is corresponding to the location of each municipality.)

This dataset represents Exclusive Economic Zones (EEZ) of the world. Up to now, there was no global public domain cover available.
Therefore, the Flanders Marine Institute decided to develop its own database. The database includes two global GIS-layers: one contains polylines that represent the maritime boundaries of the world countries, the other one is a polygon layer representing the Exclusive Economic Zone of countries. The database also contains digital information about treaties. Please note that the EEZ shapefile also includes the internal waters of each country.

This dataset contains global and regional mean sea level time series and trend maps calculated on a continual basis since December 1992 by Laboratory for Satellite Altimetry (LSA), Center for Satellite Applications and Research (STAR), NESDIS/NOAA. They are based on data from the series of reference missions (TOPEX/Poseidon, Jason-1 and Jason-2) that provide global mean sea level about every ten days with an uncertainty of 2-4 mm. In addition, estimates of mean sea level are also calculated from other satellite altimeter missions, including Geosat Follow-on, Envisat, ERS-1, and ERS-2.

IntroductionClimate Central’s Surging Seas: Risk Zone map shows areas vulnerable to near-term flooding from different combinations of sea level rise, storm surge, tides, and tsunamis, or to permanent submersion by long-term sea level rise. Within the U.S., it incorporates the latest, high-resolution, high-accuracy lidar elevation data supplied by NOAA (exceptions: see Sources), displays points of interest, and contains layers displaying social vulnerability, population density, and property value. Outside the U.S., it utilizes satellite-based elevation data from NASA in some locations, and Climate Central’s more accurate CoastalDEM in others (see Methods and Qualifiers). It provides the ability to search by location name or postal code.The accompanying Risk Finder is an interactive data toolkit available for some countries that provides local projections and assessments of exposure to sea level rise and coastal flooding tabulated for many sub-national districts, down to cities and postal codes in the U.S. Exposure assessments always include land and population, and in the U.S. extend to over 100 demographic, economic, infrastructure and environmental variables using data drawn mainly from federal sources, including NOAA, USGS, FEMA, DOT, DOE, DOI, EPA, FCC and the Census.This web tool was highlighted at the launch of The White House's Climate Data Initiative in March 2014. Climate Central's original Surging Seas was featured on NBC, CBS, and PBS U.S. national news, the cover of The New York Times, in hundreds of other stories, and in testimony for the U.S. Senate. The Atlantic Cities named it the most important map of 2012. Both the Risk Zone map and the Risk Finder are grounded in peer-reviewed science.Back to topMethods and QualifiersThis map is based on analysis of digital elevation models mosaicked together for near-total coverage of the global coast. Details and sources for U.S. and international data are below. Elevations are transformed so they are expressed relative to local high tide lines (Mean Higher High Water, or MHHW). A simple elevation threshold-based “bathtub method” is then applied to determine areas below different water levels, relative to MHHW. Within the U.S., areas below the selected water level but apparently not connected to the ocean at that level are shown in a stippled green (as opposed to solid blue) on the map. Outside the U.S., due to data quality issues and data limitations, all areas below the selected level are shown as solid blue, unless separated from the ocean by a ridge at least 20 meters (66 feet) above MHHW, in which case they are shown as not affected (no blue).Areas using lidar-based elevation data: U.S. coastal states except AlaskaElevation data used for parts of this map within the U.S. come almost entirely from ~5-meter horizontal resolution digital elevation models curated and distributed by NOAA in its Coastal Lidar collection, derived from high-accuracy laser-rangefinding measurements. The same data are used in NOAA’s Sea Level Rise Viewer. (High-resolution elevation data for Louisiana, southeast Virginia, and limited other areas comes from the U.S. Geological Survey (USGS)). Areas using CoastalDEM™ elevation data: Antigua and Barbuda, Barbados, Corn Island (Nicaragua), Dominica, Dominican Republic, Grenada, Guyana, Haiti, Jamaica, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, San Blas (Panama), Suriname, The Bahamas, Trinidad and Tobago. CoastalDEM™ is a proprietary high-accuracy bare earth elevation dataset developed especially for low-lying coastal areas by Climate Central. Use our contact form to request more information.Warning for areas using other elevation data (all other areas)Areas of this map not listed above use elevation data on a roughly 90-meter horizontal resolution grid derived from NASA’s Shuttle Radar Topography Mission (SRTM). SRTM provides surface elevations, not bare earth elevations, causing it to commonly overestimate elevations, especially in areas with dense and tall buildings or vegetation. Therefore, the map under-portrays areas that could be submerged at each water level, and exposure is greater than shown (Kulp and Strauss, 2016). However, SRTM includes error in both directions, so some areas showing exposure may not be at risk.SRTM data do not cover latitudes farther north than 60 degrees or farther south than 56 degrees, meaning that sparsely populated parts of Arctic Circle nations are not mapped here, and may show visual artifacts.Areas of this map in Alaska use elevation data on a roughly 60-meter horizontal resolution grid supplied by the U.S. Geological Survey (USGS). This data is referenced to a vertical reference frame from 1929, based on historic sea levels, and with no established conversion to modern reference frames. The data also do not take into account subsequent land uplift and subsidence, widespread in the state. As a consequence, low confidence should be placed in Alaska map portions.Flood control structures (U.S.)Levees, walls, dams or other features may protect some areas, especially at lower elevations. Levees and other flood control structures are included in this map within but not outside of the U.S., due to poor and missing data. Within the U.S., data limitations, such as an incomplete inventory of levees, and a lack of levee height data, still make assessing protection difficult. For this map, levees are assumed high and strong enough for flood protection. However, it is important to note that only 8% of monitored levees in the U.S. are rated in “Acceptable” condition (ASCE). Also note that the map implicitly includes unmapped levees and their heights, if broad enough to be effectively captured directly by the elevation data.For more information on how Surging Seas incorporates levees and elevation data in Louisiana, view our Louisiana levees and DEMs methods PDF. For more information on how Surging Seas incorporates dams in Massachusetts, view the Surging Seas column of the web tools comparison matrix for Massachusetts.ErrorErrors or omissions in elevation or levee data may lead to areas being misclassified. Furthermore, this analysis does not account for future erosion, marsh migration, or construction. As is general best practice, local detail should be verified with a site visit. Sites located in zones below a given water level may or may not be subject to flooding at that level, and sites shown as isolated may or may not be be so. Areas may be connected to water via porous bedrock geology, and also may also be connected via channels, holes, or passages for drainage that the elevation data fails to or cannot pick up. In addition, sea level rise may cause problems even in isolated low zones during rainstorms by inhibiting drainage.ConnectivityAt any water height, there will be isolated, low-lying areas whose elevation falls below the water level, but are protected from coastal flooding by either man-made flood control structures (such as levees), or the natural topography of the surrounding land. In areas using lidar-based elevation data or CoastalDEM (see above), elevation data is accurate enough that non-connected areas can be clearly identified and treated separately in analysis (these areas are colored green on the map). In the U.S., levee data are complete enough to factor levees into determining connectivity as well.However, in other areas, elevation data is much less accurate, and noisy error often produces “speckled” artifacts in the flood maps, commonly in areas that should show complete inundation. Removing non-connected areas in these places could greatly underestimate the potential for flood exposure. For this reason, in these regions, the only areas removed from the map and excluded from analysis are separated from the ocean by a ridge of at least 20 meters (66 feet) above the local high tide line, according to the data, so coastal flooding would almost certainly be impossible (e.g., the Caspian Sea region).Back to topData LayersWater Level | Projections | Legend | Social Vulnerability | Population | Ethnicity | Income | Property | LandmarksWater LevelWater level means feet or meters above the local high tide line (“Mean Higher High Water”) instead of standard elevation. Methods described above explain how each map is generated based on a selected water level. Water can reach different levels in different time frames through combinations of sea level rise, tide and storm surge. Tide gauges shown on the map show related projections (see just below).The highest water levels on this map (10, 20 and 30 meters) provide reference points for possible flood risk from tsunamis, in regions prone to them.

This data asset contains various layers / covarages, such as: - Linear features like canals, drains, streams, etc. - Features of polygon shapes like lakes and lagoons Original Map name: CARTE INTERNATIONALE DU MONDE

Originating center: Division de la Cartographie - Direction de la Conservation Fonciere et des traveaux topographiques.

The Global Land Cover Characterization Project was established to meet science data requirements identified by the International Geosphere and Biosphere Programme (IGBP), and the U. S. Global Change Research Program. The overall goal is to produce flexible large-area land cover databases to meet evolving requirements of the earth science research community.

The project was implemented by the United States Geological Survey/EROS Data Center (EDC), the University of Nebraska-Lincoln (UNL), and the Joint Research (JRC) of European Commission. This effort is part of the National Aeronautic's and Space Administration (NASA) Earth Observing System Pathfinder Program.

Funding for the project was provided by the USGS, NASA, the U.S. Environmental Protection Agency (EPA), National Oceanic and Atmospheric Administration (NOAA), U.S. Forest Service (USFS) , and the United Nations Environment Programme.

The data base has been adopted by the International Geosphere-Biosphere Programme Data and Information System office (IGBP-DIS) to fill its requirement for a global 1-km land cover data set.

[Summary provided by the USGS.]

The Maritime Zone Notification (M.Z.N. 143.2019.LOS) states that on 28 March 2019, Australia deposited with the Secretary -General, pursuant to article 16, paragraph 2, of the Convention, lists of geographical coordinates of points, concerning the baselines for measuring the breadth of the territorial sea, as contained in the Seas and Submerged Lands (Territorial Sea Baseline) Proclamation 2016.

The lists of geographical coordinates of points are referenced to the World Geodetic System (WGS 84)

https://www.un.org/depts/los/LEGISLATIONANDTREATIES/PDFFILES/mzn_s/MZN_143_2019%28RELEASED%29.pdf

https://www.un.org/depts/los/LEGISLATIONANDTREATIES/STATEFILES/AUS/Australia_TerritorialSeaBaseline2016.pdf

A digital total-sediment-thickness database for the world's oceans and marginal seas has been compiled by the NOAA National Geophysical Data Center (NGDC). The data were gridded with a grid spacing of 5 arc-minutes by 5 arc-minutes. Sediment-thickness data were compiled from three principle sources: (i) previously published isopach maps including Ludwig and Houtz [1979], Matthias et al. [1988], Divins and Rabinowitz [1990], Hayes and LaBrecque [1991], and Divins [2003]; (ii) ocean drilling results, both from the Ocean Drilling Program (ODP) and the Deep Sea Drilling Project (DSDP); and (iii) seismic reflection profiles archived at NGDC as well as seismic data and isopach maps available as part of the IOC's International Geological-Geophysical Atlas of the Pacific Ocean [Udinstev, 2003].

This polygon shapefile represents areas of inland water in Cote d'Ivoire. The Global Map Cote d'Ivoire version 2 was developed based on Global Map Specifications version 2.2. The data source of Boundary, Drainage and Transportation layers were a 1:500000 map image (Topo 500 V2) made in 2012.

The NASA Earth Observatory produces high-quality global images monthly for public use and distribution. These monthly global images provides web-resolution copies of each of the monthly maps, along with links to 8km/pixel and 2km/pixel JPEGs, and full-resolution torrents.

The "EMODnet Digital Bathymetry (DTM) - 2016" is a multilayer bathymetric product for Europe’s sea basins covering:: • the Greater North Sea, including the Kattegat and stretches of water such as Fair Isle, Cromarty, Forth, Forties, Dover, Wight, and Portland • the English Channel and Celtic Seas • Western and Central Mediterranean Sea and Ionian Sea • Bay of Biscay, Iberian coast and North-East Atlantic • Adriatic Sea • Aegean - Levantine Sea (Eastern Mediterranean) • Azores - Madeira EEZ • Canary Islands • Baltic Sea • Black Sea • Norwegian – Icelandic seas

The DTM is based upon more than 7700 bathymetric survey data sets and Composite DTMs that have been gathered from 27 data providers from 18 European countries and involving 169 data originators. The gathered survey data sets can be discovered and requested for access through the Common Data Index (CDI) data discovery and access service that also contains additional European survey data sets for global waters. The Composite DTMs can be discovered through the Sextant Catalogue service. Both discovery services make use of SeaDataNet standards and services and have been integrated in the EMODnet portal (https://emodnet.ec.europa.eu/en/bathymetry#bathymetry-services ).

In addition, the EMODnet Map Viewer (https://emodnet.ec.europa.eu/geoviewer/ ) gives users wide functionality for viewing and downloading the EMODnet digital bathymetry such as: • water depth (refering to the Lowest Astronomical Tide Datum - LAT) in gridded form on a DTM grid of 1/8 * 1/8 arc minute of longitude and latitude (ca 230 * 230 meters) • option to view depth parameters of individual DTM cells and references to source data • option to download DTM in 16 tiles in different formats: EMO, EMO (without GEBCO data), ESRI ASCII, ESRI ASCII Mean Sea Level, XYZ, NetCDF (CF), RGB GeoTiff and SD • layer with a number of high resolution DTMs for coastal regions • layer with wrecks from the UKHO Wrecks database. The NetCDF (CF) DTM files are fit for use in a special 3D Viewer software package which is based on the existing open source NASA World Wind JSK application. It has been developed in the frame of the EU FP7 Geo-Seas project (another sibling of SeaDataNet for marine geological and geophysical data) and is freely available. The 3D viewer also supports the ingestion of WMS overlay maps. The SD files can also be used for 3D viewing by means of the freely available iView4De(Fledermaus) software.

The original datasets themselves are not distributed but described in the metadata services, giving clear information about the background survey data used for the DTM, their access restrictions, originators and distributors and facilitating requests by users to originator.

The "EMODnet Digital Bathymetry (DTM) - 2016" is a multilayer bathymetric product for Europe’s sea basins covering:: • the Greater North Sea, including the Kattegat and stretches of water such as Fair Isle, Cromarty, Forth, Forties, Dover, Wight, and Portland • the English Channel and Celtic Seas • Western and Central Mediterranean Sea and Ionian Sea • Bay of Biscay, Iberian coast and North-East Atlantic • Adriatic Sea • Aegean - Levantine Sea (Eastern Mediterranean) • Azores - Madeira EEZ • Canary Islands • Baltic Sea • Black Sea • Norwegian – Icelandic seas

The DTM is based upon more than 7700 bathymetric survey data sets and Composite DTMs that have been gathered from 27 data providers from 18 European countries and involving 169 data originators. The gathered survey data sets can be discovered and requested for access through the Common Data Index (CDI) data discovery and access service that also contains additional European survey data sets for global waters. This discovery service makes use of SeaDataNet standards and services and have been integrated in the EMODnet portal (https://emodnet.ec.europa.eu/en/bathymetry#bathymetry-services ). The Composite DTMs are described using the Sextant Catalogue Service that makes also use of SeaDataNet standards and services. Their metadata can retrieved through interrogating the Source Reference map in the Central Map Viewing service (https://emodnet.ec.europa.eu/geoviewer/ ). In addition, the EMODnet Map Viewer gives users wide functionality for viewing and downloading the EMODnet digital bathymetry such as: • water depth (refering to the Lowest Astronomical Tide Datum - LAT) in gridded form on a DTM grid of 1/8 * 1/8 arc minute of longitude and latitude (ca 230 * 230 meters) • option to view depth parameters of individual DTM cells and references to source data • option to download DTM in 16 tiles in different formats: EMO, EMO (without GEBCO data), ESRI ASCII, ESRI ASCII Mean Sea Level, XYZ, NetCDF (CF), RGB GeoTiff and SD • layer with a number of high resolution DTMs for coastal regions • layer with wrecks from the UKHO Wrecks database. The NetCDF (CF) DTM files are fit for use in a special 3D Viewer software package which is based on the existing open source NASA World Wind JSK application. It has been developed in the frame of the EU FP7 Geo-Seas project (another sibling of SeaDataNet for marine geological and geophysical data) and is freely available. The 3D viewer also supports the ingestion of WMS overlay maps. The SD files can also be used for 3D viewing by means of the freely available iView4De(Fledermaus) software.

The original datasets themselves are not distributed but described in the metadata services, giving clear information about the background survey data used for the DTM, their access restrictions, originators and distributors and facilitating requests by users to originator.