> For the complete documentation index, see [llms.txt](https://docs.os.uk/osngd/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.os.uk/osngd/using-os-ngd-data/os-ngd-land-cover-enhancements/cross-reference-table.md).
# Cross reference table
The Habitat Coverage cross reference table provides the new attribution for habitat mapping and percentage coverage by linking to the OSID. There is a one-to-many relationship which should be considered when joining the cross reference table to features in GIS software packages.
The naming of the Habitat Coverage Reference file depends on which topographic area feature it applies to, i.e.:
* OS NGD Land feature type = land\_habcovref
* OS NGD Rail feature type = rail\_habcovref
* OS NGD Road Track or Path feature type = roadtrackorpath\_habcovref
* OS NGD Structure feature type = structure\_habcovref
* OS NGD Water feature type = water\_habcovref
The Habitat Coverage Reference table is included with the GeoPackage file and is available separately if data is requested in CSV format.
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