SeaDataNet is a pan-European distributed marine data infrastructure for the management, exchange and re-use of marine and oceanographic data sets and collections. A major objective and challenge in SeaDataNet is to promote discoverability of these data resources in a consistent and comprehensive manner. This is achieved through the SeaDataNet metadata services a set of directories, with associated user interfaces and web services, each governed by a SeaDataNet partner and content provided through national SeaDataNet collating nodes. The European Directory of Cruise Summary Reports (CSR) is the SeaDataNet catalogue promoting discoverability of, and access to, reports of the research oceanographic cruises operated by European countries. CSR utilises a metadata format based upon the ISO 19119 content model. The CSR Schema and XML coding are supported by URLs and URNs to the SeaDataNet Common Vocabularies.Find an existing cruise, see if cruises exist in your area of interestChief scientists of Research cruises, Oceanographers, researchers, ship owners, public authorities.

The **SeaDataNet CDI OGC WMS service** provides an endpoint for visualization of CDI metadata on a map. It can be used to add CDI metadata locations into a (web)GIS application, possibly in combination with the CDI WFS service. The SeaDataNet infrastructure links more than 100 national oceanographic data centres and marine data centres from 35 countries bordering all European seas. The data centres manage large sets of marine and ocean data (such as samples, timeseries, profiles, trajectories, etc), originating from their own institutes and from other parties in their country, in a variety of data management systems and configurations. The CDI service itself provides access to the data resources from more than 800 data originators. The Common Data Index service (CDI) gives users, via an ISO19115 - ISO19139 based index (metadatabase), a highly detailed insight in the availability and geographical spreading of marine data from the different data centres across Europe. Data sets are available in ODV (Ocean Data View) and NetCDF (CF) SeaDataNet formats that can be imported to ODV software, which includes the Data Interpolating Variational Analysis software tool (DIVA).

SeaDataNet is a pan-European distributed marine data infrastructure for the management, exchange and re-use of marine and oceanographic data sets. A major objective and challenge in SeaDataNet is to promote discoverability of these data resources in a consistent and comprehensive manner. This is achieved through the SeaDataNet metadata services a set of directories, with associated user interfaces and web services, each governed by a SeaDataNet partner and content provided through national SeaDataNet collating nodes. The European Directory of Marine Environmental Data (EDMED) is the SeaDataNet catalogue promoting discoverability of, and access to, marine and oceanographic data sets and collections held within European research organisations. EDMED covers a wide range of disciplines including marine meteorology; physical, chemical and biological oceanography; and marine geology and geophysics. Data sets are described in EDMED irrespective of their format. EDMED utilises a metadata format based upon the ISO 19115 content model. The EDMED Schema and XML coding are supported by URLs and URNs to the SeaDataNet Common Vocabularies.For communities who need to search and access standardised marine data sets and collectionsMore than 110 data providers (linked to more than 600 data originators) and several thousands of data users.

The **SeaDataNet CDI OGC WFS service** provides a metadata endpoint in OGC Feature format. It provides a WFS endpoint to the metadata overview of the CDI service, e.g. for integration in (web)GIS applications. The SeaDataNet infrastructure links more than 100 national oceanographic data centres and marine data centres from 35 countries bordering all European seas. The data centres manage large sets of marine and ocean data (such as samples, timeseries, profiles, trajectories, etc), originating from their own institutes and from other parties in their country, in a variety of data management systems and configurations. The CDI service itself provides access to the data resources from more than 800 data originators. The Common Data Index service (CDI) gives users, via an ISO19115 - ISO19139 based index (metadatabase), a highly detailed insight in the availability and geographical spreading of marine data from the different data centres across Europe. Data sets are available in ODV (Ocean Data View) and NetCDF (CF) SeaDataNet formats that can be imported to ODV software, which includes the Data Interpolating Variational Analysis software tool (DIVA).

SeaDataNet is a pan-European distributed marine data infrastructure for the management, exchange and re-use of marine and oceanographic data sets. One of the objectives is to provide an overview of marine environmental research projects. This is set up as a directory that is ready for discovery, but also supporting other SeaDataNet metadata directories (e.g CDI datasets information refers to a project in EDMERP to indicate the origine of data). EDMERP covers marine research projects for a wide range of disciplines including marine meteorology; physical, chemical and biological oceanography; sedimentology; marine biology and fisheries; environmental quality; coastal and estuarine studies; marine geology and geophysics etc. Research projects are described as metadata factsheets with their most relevant aspects. The primary objective is to support users in identifying interesting research activities and in connecting them to involved research managers and organisations across Europe, which is valuable for EOSC and EOSC communities. Currently, EDMERP describes around 3.000 research projects from organisations across Europe. EDMERP offers two interfaces, a regular HTML interface for human users and a SPARQL Endpoint for machine applications.For users who want to have access to the main european-scale marine research projects active in the marine research domain.

ODV (Ocean Data View, Schlitzer (2002)) is a widely used software package for the analysis, exploration and visualization of oceanographic and other environmental data with almost 100,000 registrations since the 1990’s and more than 10,000 active users. ODV has been developed largely in the framework of SeaDataNet (the pan-European infrastructure of marine data centers) in which it has become one of the pillars for working with marine in situ data, as well as quality control of the data. One strength of ODV is the flexible and efficient handling of diverse and large data collections often consisting of millions of stations on standard computer hardware. By design, ODV is a stand-alone application that has to be installed on local computers and operates on locally stored datasets. This concept is optimal for cases where datasets are not widely shared and do not change often. Also, because software and data both reside on the end-user’s computer, ODV can be used during expeditions and in remote regions, when internet connections are slow or non-existing. However, the stand-alone configuration is not ideal when users want to work with large community datasets that are updated frequently. The disadvantages are that users have to download the typically large datasets to their local computers and that the local copies of the datasets quickly become outdated because changes in the dataset master copy are not automatically transmitted to the local copy. Users would have to download the modified master dataset again to synchronize with the latest version. Additionally, users are often only interested in specific parts of a large dataset, thus a subsetting service prior to downloading the data would be highly appreciated. To address these issues AWI has developed an online version of the ODV software called webODV, and provides typical ODV functionality in form of web services. The idea is to provide clients with user-friendly interfaces in their web-browser and give access to datasets centrally maintained and administered on a server. Obviously, this setup requires internet connection. Users will always work with the latest version of the datasets and will not have to download and store the data on the local computer. This allows analysis and exploration of marine and other environmental data on less capable hardware, such as tablets and smartphones. A first version of WebODV was developed under SeaDataCloud as part of its Virtual Research Environment in the cloud. The version currently deployed on EGI resources (supported by the EGI-ACE project) provides users access to large collections of high quality marine in situ data, on top of which WebODV can be used to direct extract subsets, inspect and visualise the datasets.

The SeaDataNet infrastructure links more than 100 national oceanographic data centres and marine data centres from 35 countries bordering all European seas. The data centres manage large sets of marine and ocean data (such as samples, timeseries, profiles, trajectories, etc), originating from their own institutes and from other parties in their country, in a variety of data management systems and configurations. CDI offers two interfaces, a regular HTML interface for "human users" and a SPARQL Endpoint. The **SeaDataNet CDI SPARQL Endpoint** provides a machine-to-machine access to the harmonised CDI metadata with links to order/access these data resources. The SPARQL endpoint is meant for users who need machine access the CDI metadata collection decribing oceanographic in-situ measurements of high quality in a standardised format (datasets from more than 800 data originators). The SPARQL endpoint follows the W3C rules and allows data to be harvested and indexed by machines applications like search engines. On the SPARQL endpoints webpage you will find the references to documentation how to use it. Data sets are available in ODV (Ocean Data View) and NetCDF (CF) SeaDataNet formats that can be imported to ODV software, which includes the Data Interpolating Variational Analysis software tool (DIVA).

The SeaDataNet infrastructure links more than 100 national oceanographic data centres and marine data centres from 35 countries bordering all European seas. The data centres manage large sets of marine and ocean data (such as samples, timeseries, profiles, trajectories, etc), originating from their own institutes and from other parties in their country, in a variety of data management systems and configurations. The **SeaDataNet CDI User Interface** provides to human users an integrated and harmonised overview and access to these data resources from more than 800 data originators. The Common Data Index service (CDI) gives via an ISO19115 - ISO19139 based index (metadatabase) users a highly detailed insight in the availability and geographical spreading of marine data from the different data centres across Europe. The data is also targeted to EOSC and EOSC communities for use in research towards the state of the ocean. Data sets are available in ODV (Ocean Data View) and NetCDF (CF) SeaDataNet formats that can be imported to ODV software, which includes the Data Interpolating Variational Analysis software tool (DIVA).