Data check

Check marine dataset files and their metadata before you publish them. Add your files or a link to a public Zenodo or GeoNetwork record or a DOI; the tool proposes a column mapping, you confirm it, and it reports each problem it finds in plain words, with the rule and its source.

What it checks

• Licence: is it stated, machine-readable (name, version and link), and the same in every record (ISO 19139, DataCite, Zenodo)?
• Metadata against the data: dates outside the stated time span, points outside the bounding box, variables named in the abstract but missing from the file.
• Rows: impossible coordinates, latitude written into the longitude column, ragged rows, text in numeric columns, unreadable or ambiguous dates, missing units.
• Across several files: the same samples under different dates or unit labels, swapped or differing station positions.
• Chemistry: unit pairs that disagree (e.g. mg/L against µmol/L), DIC above alkalinity, values outside published QC ranges (Argo, GTSPP).

What this tool does not check

• Whether the measurements are scientifically valid.
• Instrument calibration and measurement accuracy.
• Species names and taxonomy.
• The contents of PDF files (tables are not extracted from PDFs).
• Variables for which this tool has no cited range or unit rule.

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