How to share your metadata through the EU BON Portal - Home


The European Biodiversity Portal offers access to biodiversity observations and ecological data, statistics, and analyses of changes over time, along with tools for sharing or discovering data and products generated by scientific and analytical processes.

Use Case Topics

The EU BON tools, products and services support the following particular use case topics.  For the decision making and scientific assesment, biodiversity change can be measured and analysed at different levels. Data sharing is also supported, helping users to find solutions to gather and share their own data.

Essential Biodiversity Variables

Derived measurements required to study, report, and manage biodiversity change

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Citizen Science

Find guidelines, use cases and help to start a citizen science project

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Test sites

In situ application and results of EU BON tools, guidelines and products

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Model where maritime species are and where they may be in the future, as the foundation for plans to save species

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How to share your metadata through the EU BON Portal

The EU BON Portal integrates biodiversity observation systems under one search facility. The portal offers a spatially, temporally, and taxonomically oriented user interface to locate biodiversity datasets. See


Many national or thematic metadata catalogues exist, which can easily share their data through EU BON, and hence, through GEOSS Here is how various metadata catalogues can link their data with EU BON. We would suggest one of two alternatives:

  1. Ecological Metadata Language (EML): Create a EML harvest list, that is, a simple XML file linking each EML file, e.g., see

  2. ISO 19115: Use GeoNetwork, or similar software, to expose metadata as an OGC CSW service.

If you start from scratch and have no other uses for the metadata, go for the first option. As a manual exercise, map your metadata fields to EML elements. It requires title and short description of the dataset, contact information, spatial, temporal, and taxonomic coverage, and optionally some description of the observation methods used. Then programmatically from your own database generate one EML document for each metadata entry. Finally, generate the EML harvest list following the above example. Guidance for EML is available here


If you are sharing your metadata through INSPIRE or other mechanisms, you may want to use ISO 19115. The EU BON Portal can also consume other formats, such as OAI-PMH, OpenSearch, etc. If you already have those formats available, you can instead use them.


Once you have your metadata ready for harvesting or just testing, please inform EU BON Portal administrator using the contact form

EU BON Project Site