# Introduction

The land cover enhancements align the OS land cover classifications to European Nature Information System (EUNIS) and UK Biodiversity Action Plan (BAP) Broad Habitats classification scheme values and provide a percentage of each land cover classification. These enhancements apply to ‘natural’ topographic area features which exist across several OS NGD themes:

| OS NGD Theme      | Feature Type       |
| ----------------- | ------------------ |
| OS NGD Land       | Land               |
| OS NGD Structures | Structure          |
| OS NGD Transport  | Rail               |
| OS NGD Transport  | Road Track Or Path |
| OS NGD Water      | Water              |

<figure><img src="/files/gmkQcdFolcRrNIGFhKjv" alt="Example map showing Land Cover Enhancement features, including Land, Water, Structure, Rail and Road Track Or Path features."><figcaption><p>Example map showing Land Cover Enhancement features, including Land, Water, Structure, Rail and Road Track Or Path features.</p></figcaption></figure>

The feature’s OS Land Cover Tier B attribute is mapped to EUNIS and UK BAP Broad Habitats classification scheme values where the topographic area feature is ‘natural’, i.e. the [OS Land Cover Tier A](/osngd/code-lists/code-lists-overview/landcovertieravalue.md) attribute is one of ‘Excavated or Deposited’, ‘Open Vegetation’, ‘Mineral’, ‘Multiple’, ‘Trees’, ‘Under Construction’ or ‘Water’.

A percentage cover value is also assigned to the OS Land Cover Tier B attribute for those features above the Mean High Water (Springs) line. Water features are not given a percentage cover value.

The land cover enhancements are supplied in a new cross-reference table. See the [Habitat Coverage Reference table](/osngd/data-structure/land/land-features/land.md#habitat-coverage-reference) relating to the Land Feature Type.

The image below provides examples of these natural land cover features in the OS NGD:

<figure><img src="/files/PKyzyyGwe1WA2wKn3lkF" alt="Example map showing natural land cover features and attribution in OS NGD, including Land, Water, Structure, Rail and Road Track Or Path features."><figcaption><p>Example map showing natural land cover features and attribution in OS NGD, including Land, Water, Structure, and Rail and Road Track Or Path features.</p></figcaption></figure>


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