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Deposit your marine geoscience data in the ���ճԹ� MEDIN DAC using the NGDC Data Deposit Portal (select MEDIN from the list of data sources). Data will be archived for the long term and made openly available.

For large or recurrent deposits, please contact us first.

Larger datasets can be deposited by file transfer program (FTP) or hard drive. You should still use the Data Deposit Portal to enter the details and��specify��how the data will be transferred.

See our data deposit guidelines.

• View and download data using the offshore GeoIndex.
• The GeoIndex is also available as a web map service (WMS).
• Data is also made available via the .
• Access NGR collections if you wish to arrange a visit or sample the��marine core and grab��material.
• More�����Դڴǰ������پ��Dz� on ���ճԹ� marine data.

Most open-access data is freely available online under the . However, some data is not yet processed for online delivery and, in these cases, there may be a charge to cover data preparation.

• Contact us

Data held includes both ���ճԹ� data and data from other organisations and includes various data types:

• ���ճԹ� marine data
• offshore GeoIndex
• : a list of surveys in the MEDIN portal, which links to the survey on the ��where you can view and download data
• : a higher-level summary of ���ճԹ� marine data holdings
• : oil and gas industry site survey metadata collated by the ���ճԹ�. The ���ճԹ� does not hold this data; contact the custodian for further information and access to data. See the for more information
• : Strategic Environmental Assessment (SEA) data. SEA data is also searchable via the��SEA Portal
• Maritime and Coastguard Agency (MCA) Civil Hydrography Programme (CHP)��seabed sample data��.
• (or via��)

The marine data goes back to the 1960s and thus contains a large amount of paper records. Scans are available to view and download through the offshore GeoIndex, though a proportion remain on paper only; these are available on request.

The records range from simple geological descriptions, graphical borehole logs and seismic data plots through to full technical reports.

• Gallery of examples

Data was collected using various geophysical techniques. Digital data is held together with legacy analogue data and paper records. Where possible, records have been scanned and data has been migrated to modern media. A proportion remains on paper; these are available on request.

Seismic reflection profiling data

Sub-seabed imaging gives information about structures beneath the seabed. You can access the data via the seismic reflection layer in the . Digital segy data is available on request.

• Gallery of examples

Multibeam backscatter and side-scan sonar data

Seabed imaging provides information about the seabed that can be used in seabed characterisation. You can view and download backscatter data via the backscatter layers and side-scan data via the sonar layer in the . Associated bathymetry data are available from the .

Gravity and magnetic data

This includes unadjusted ship gravity and magnetic��data collected by the ���ճԹ� or received from various commercial and academic surveys.

Geological sample data from cores, boreholes, grabs, etc. is available via the . Much of the legacy paper records have also been transcribed to digital form.

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Particle size analyses

This dataset, primarily at seabed, includes folk analysis, gravel, sand and mud fractions, carbonate content and phi/half phi analysis. You can access data via the seabed sediment data layers of the .

Geological descriptions

Geological descriptions and observations of the various types of lithological units found in offshore samples. You can access data via the geology data layers of the .

Geotechnical analyses

Compressive and shear strength measurements for selected sample locations. You can access data via the geotechnical data layers of the .

Geochemical analyses

Geochemical data, consisting of a set of 38 elements, is available for seabed samples and was�� collected from a variety of sediment types. For more information, see . You can access data via the geochemical data layer of the .

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Much of the legacy paper records��have also been transcribed to digital form.

• Gallery of examples

Marine geological samples are held in the��National Geological Repository. See Accessing NGR collections if you wish to arrange a visit or sample the material. Please��deposit any data��from analysis carried out on the samples��with the NGDC.

Offshore core material

Borehole, vibrocore and gravity core and seabed drillcore material collected by the ���ճԹ� and other organisations from the sea areas around the UK.

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Seabed samples

Seabed surface samples are material collected using equipment such as grabs or dredges from around the UK.

Offshore hydrocarbon wells

The UK Continental Shelf (UKCS) hydrocarbon well collection contains drillcore material and samples of cuttings.��Search the wells or use the ��and view images of core where available.

MCA CHP seabed samples

Seabed samples���ڰ��dz�����(MCA) UK Civil Hydrography Programme (CHP) bathymetric surveys and associated data are held and available for further analysis.

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• Ensure the�����ܳ�����������information entered��in the data portal��is accurate and meaningful.  This allows someone to quickly understand what the dataset is and if it is of interest to them.
• The dataset title should be brief and precise and include the following: date, organisation/programme, location, and survey and��data types.��
• The dataset description should be a clear and concise statement of what the dataset contains.��See some examples.
• Open data is preferred and data will be made available under an , whereby it can be used for any purpose without restriction provided the data owner is acknowledged. If you require any other licence, such as , please specify. See Digital Curation Centre’s guide on .
• Data can be held temporarily under embargo (between six months and two years) if required. Metadata will be visible during this time.
• If a specific acknowledgement statement is required, please include this.
• Let us know if you require a��digital object identifier��(DOI) so that your data can be cited in the same manner as a scientific journal article. A DOI is persistent and recognises the value of the data and the effort that has gone into its creation.
• Include a data availability statement in your publications, specifying where to access the data��and the DOI.
• See the��NGDC deposit guidelines��for more details.

The ���ճԹ� is a partner in the European EMODnet ingestion project, aiming to connect marine data holders not yet connected to existing infrastructures��such as MEDIN.��Data can be deposited via the . After data is ingested, it is passed to the appropriate expert national data centre for publishing.

Discovery metadata is information about your dataset that allows someone else to quickly understand where and when your dataset was collected and what type of data is available.

We provide metadata to MEDIN in the , which can be searched via the��, or metadata can be provided directly to MEDIN. MEDIN provides some tools for this.

• Follow good data management practice throughout the generation of your data and ensure that any data provided is�� re-usable.
• Use standard, open, non proprietary formats, e.g. segy for seismic data or xtf for sidescan sonar. See acceptable formats�����Ի�����for more information.
• Both raw and processed data��may be deposited, provided the files��are useful,��clearly specified��and processing steps are documented.��Processing techniques��may improve in future, enabling data to be reprocessed.
• Do not include duplicate, draft, interim or spurious files or empty folders.
• Clearly label parameters and units.
• Use unique, meaningful and consistent file names that match documentation.
• Quality control your data.
• Ensure your data is well organised and consistent. Data can be organised in a defined folder structure such as the ���ճԹ� folder structure.
• See the�����ճԹ� survey data management handbook��for more information.

Include detailed metadata/documentation with your data to enable future users to use the data with confidence. Refer to the��. These are specific to each data type (e.g. bathymetry, sidescan sonar, seismic, grab and core), providing guidance on what information to archive alongside your data.

This also makes it easier to ingest data into the DAC. The information may be provided in a MEDIN data guideline template or survey report, including the information below:

• equipment, software, processing, methods, etc.
• quality information and any issues
• coordinate reference system
• reason for any missing data
• any other useful documents, such as acquisition, processing, QC reports or logs
• GIS information, e.g. polygons, lines and points of survey extent and data locations
• if data/metadata are in reports, ensure that the information is easily extractable (tables)

Geological sample data

• See the����and geotechnical data guidelines for more details.
• Each core or grab should have a distinct ID, which should match filenames/data.

Geophysical data

• Processed data should be corrected with any laybacks applied.
• Each line should have a distinct name/ID, which should match filenames.
• Ensure positional data is available for each line.

Multibeam bathymetry/backscatter data

• We archive the backscatter component of multibeam data.
• Send bathymetry data directly to the��.

Photos and videos

• Photos and videos from benthic surveys with a biological component should be sent to the����DAC for marine species and habitats data.
• We can accept photos and videos from geological surveys with no biology.

Renewables and aggregates data

• Renewables and aggregates-related data (England and Wales) should be submitted to the��.
• Please refer to the��.

Oil and gas data

• Oil and gas data relating to exploration should be submitted to��/.
• We archive metadata for site surveys and publish on the MEDIN portal (the ���ճԹ� does not hold the data).��.

• Physical sample material from boreholes, cores and grabs can be deposited with the��National Geological Repository.
• The possibility of depositing these will be discussed case-by-case depending on location, terminal depth and proximity to other samples.��Samples must be��fully and accurately documented��including��tables��of all��cores/grabs with positions��so the material can be correctly registered.��