Data Repository Comparison Chart
The table below is a starting point for choosing a data repository for archiving your data. This is not a comprehensive list of all data repositories out there, but a starting point that covers some of the most common options. The re3data project (Registry of Research Data Repositories) is a global registry of research data repositories across various disciplines. To explore data repositories by subject, use their graphical web tool.
| Repository Name | Metadata Requirements | Domain | Data Formats Accepted | Data Size Restrictions | Storage Costs |
|---|---|---|---|---|---|
| Environmental Data Initiative | Metadata is submitted in the Ecological Metadata Language (EML) | All ecological and environmental data, irrespective of origin. | Non-proprietary and non-binary format (e.g. .csv, .txt). Some exceptions allowed. | Soft limit of 500MB and hard limit of 100GB per data package. | Free |
| Dryad | Required fields: journal name, title, author(s), abstract, research domain, keywords. | All research domains. | Most file types are supported, but non-proprietary files are preferred. | Individual files should not exceed 10GB. | Priced per dataset size. |
| Figshare | Required fields: item title, item type, author(s), categories, keywords, description, and license. | All research domains. | Almost all file types are supported. | All figshare accounts are provided with 20GB of storage. Individual files cannot exceed 20GB. | Free up to 20GB per figshare account. Plans are available for increased storage capacity. |
| Zenodo | Required fields: title, publication date, creators, and description. | All research domains. | Most file types are supported, but non-proprietary formats are preferred. | 50GB per record with a maximum of 100 files. | Free up to 50GB per record. A free one-time 200GB request is allowed. |
| PANGAEA | Required fields: title, author(s), abstract, license, and parameters. | Georeferenced data from earth system research. | Focus on tabular data. Data should be formatted as TAB-delimited text files in UTF-8 encoding or open spreadsheet file formats (MS Excel). | Individual files must be less than 15GB. Limit of 20 files per submission. | Free but they accept a contribution for projects with funding for publication costs. |
Another resource you can use is the Generalist Repository Comparison Chart, designed by The American Geophysical Union and generalist repository collaborators. This chart explores other topics and repositories not mentioned above, including licensing options, persistent identifiers, and usage statistics.
Metadata standards and FAIR data
Metadata standards often drive the query logic behind these data repositories. It’s important to consider this when you are choosing your data repository. Think about how different requirements might make it easier, or more difficult, for your data to be discovered and accessed.
While submitting to any of the above repositories often checks off the Findable and Accessible points of the FAIR data standards, you also need to ensure that you are providing rich and contextual metadata alongside your data to ensure that it is also Interoperable and Reusable. While some of the data repositories above have more relaxed metadata requirements, simply submitting your data with the minimum requirements won’t necessarily make them FAIR. It is recommended to go beyond the minimum metadata requirements when depositing your data to enhance discoverability and ensure reusability.
While EDI’s Ecological Metadata Language is detailed and complex, they provide metadata generation tools that can make it easier to meet their requirements. For a great example of EML metadata, check out Ariel Johnson’s data set from the Forest Resilience Threshold Experiment DOI (Full metadata here)