# What data is available?

## What feature types are available in OS NGD API – Tiles?

### Basemap (ngd-base)

The following table details the OS NGD datasets that were used to create the OS NGD API – Tiles basemap. The result is a detailed OS basemap that combines [OS Open Zoomstack](https://www.ordnancesurvey.co.uk/business-government/products/open-zoomstack) and OS NGD data.

<table><thead><tr><th width="212">Theme</th><th width="202.33333333333331">Collection</th><th>Feature Type(s)</th></tr></thead><tbody><tr><td><a data-mention href="../../../using-os-ngd-data/os-ngd-buildings">os-ngd-buildings</a></td><td><a data-mention href="../../../data-structure/buildings/building-features">building-features</a></td><td><a data-mention href="../../../data-structure/buildings/building-features/building-part">building-part</a></td></tr><tr><td><a data-mention href="../../../data-structure/geographical-names">geographical-names</a></td><td><a data-mention href="../../../data-structure/geographical-names/named-features">named-features</a></td><td><a data-mention href="../../../data-structure/geographical-names/named-features/named-point">named-point</a></td></tr><tr><td><a data-mention href="../../../data-structure/land">land</a></td><td><a data-mention href="../../../data-structure/land/land-features">land-features</a></td><td><a data-mention href="../../../data-structure/land/land-features/land">land</a>, <a data-mention href="../../../data-structure/land/land-features/land-point">land-point</a>, <a data-mention href="../../../data-structure/land/land-features/landform">landform</a>, <a data-mention href="../../../data-structure/land/land-features/landform-line">landform-line</a></td></tr><tr><td><a data-mention href="../../../data-structure/land-use">land-use</a></td><td><a data-mention href="../../../data-structure/land-use/land-use-features">land-use-features</a></td><td><a data-mention href="../../../data-structure/land-use/land-use-features/site">site</a></td></tr><tr><td><a data-mention href="../../../using-os-ngd-data/os-ngd-structures">os-ngd-structures</a></td><td><a data-mention href="../../../data-structure/structures/structure-features">structure-features</a></td><td><a data-mention href="../../../data-structure/structures/structure-features/compound-structure">compound-structure</a>, <a data-mention href="../../../data-structure/structures/structure-features/field-boundary">field-boundary</a>, <a data-mention href="../../../data-structure/structures/structure-features/structure">structure</a>, <a data-mention href="../../../data-structure/structures/structure-features/structure-line">structure-line</a></td></tr><tr><td><a data-mention href="../../../using-os-ngd-data/os-ngd-transport">os-ngd-transport</a></td><td><a data-mention href="../../../data-structure/transport/transport-features">transport-features</a></td><td><a data-mention href="../../../data-structure/transport/transport-features/cartographic-rail-detail">cartographic-rail-detail</a>, <a data-mention href="../../../data-structure/transport/transport-features/rail">rail</a>, <a data-mention href="../../../data-structure/transport/transport-features/road-line">road-line</a>, <a data-mention href="../../../data-structure/transport/transport-features/road-track-or-path">road-track-or-path</a></td></tr><tr><td></td><td><a data-mention href="../../../data-structure/transport/transport-network">transport-network</a></td><td><a data-mention href="../../../data-structure/transport/transport-network/path">path</a>, <a data-mention href="../../../data-structure/transport/transport-network/path-link">path-link</a>, <a data-mention href="../../../data-structure/transport/transport-network/road">road</a></td></tr><tr><td><a data-mention href="../../../data-structure/water">water</a></td><td><a data-mention href="../../../data-structure/water/water-features">water-features</a></td><td><a data-mention href="../../../data-structure/water/water-features/inter-tidal-line">inter-tidal-line</a>, <a data-mention href="../../../data-structure/water/water-features/tidal-boundary">tidal-boundary</a>, <a data-mention href="../../../data-structure/water/water-features/water">water</a>, <a data-mention href="../../../data-structure/water/water-features/water-point">water-point</a></td></tr><tr><td></td><td><a data-mention href="../../../data-structure/water/water-network">water-network</a></td><td><a data-mention href="../../../data-structure/water/water-network/water-link">water-link</a>, <a data-mention href="../../../data-structure/water/water-network/water-link-set">water-link-set</a>, <a data-mention href="../../../data-structure/water/water-network/water-node">water-node</a></td></tr></tbody></table>

{% hint style="info" %}
Find out more about the hierarchy of OS NGD data from the [Terminology and access page in the OS NGD Fundamentals](https://docs.os.uk/osngd/getting-started/os-ngd-fundamentals/terminology-and-access).
{% endhint %}

{% hint style="info" %}
If you are interested in addressing information, [**OS Places API**](https://docs.os.uk/os-apis/accessing-os-apis/os-places-api) **provides a detailed view of an address and its lifecycle**, giving you direct access to rich address data for geocoding, postcode searching, form-filling and much more.
{% endhint %}

### Data overlays

The following table details the OS NGD datasets that can be used as overlays to the basemap to add additional information:

<table><thead><tr><th>Theme</th><th width="155">Collection</th><th width="217">Feature Type(s)</th><th>Collection ID</th></tr></thead><tbody><tr><td><a data-mention href="../../../data-structure/administrative-and-statistical-units">administrative-and-statistical-units</a></td><td><a data-mention href="../../../data-structure/administrative-and-statistical-units/boundaries">boundaries</a></td><td><a data-mention href="../../../data-structure/administrative-and-statistical-units/boundaries/boundary-high-water-mark">boundary-high-water-mark</a>, <a data-mention href="../../../data-structure/administrative-and-statistical-units/boundaries/ceremonial-county">ceremonial-county</a>, <a data-mention href="../../../data-structure/administrative-and-statistical-units/boundaries/country">country</a>, <a data-mention href="../../../data-structure/administrative-and-statistical-units/boundaries/devolved-parliament-constituency">devolved-parliament-constituency</a>, <a data-mention href="../../../data-structure/administrative-and-statistical-units/boundaries/devolved-parliament-electoral-region">devolved-parliament-electoral-region</a>, <a data-mention href="../../../data-structure/administrative-and-statistical-units/boundaries/electoral-division">electoral-division</a>, <a data-mention href="../../../data-structure/administrative-and-statistical-units/boundaries/gla-assembly-constituency">gla-assembly-constituency</a>, <a data-mention href="../../../data-structure/administrative-and-statistical-units/boundaries/historic-county">historic-county</a>, <a data-mention href="../../../data-structure/administrative-and-statistical-units/boundaries/historic-european-region">historic-european-region</a>, <a data-mention href="../../../data-structure/administrative-and-statistical-units/boundaries/lower-tier-local-authority">lower-tier-local-authority</a>, <a data-mention href="../../../data-structure/administrative-and-statistical-units/boundaries/parish-or-community">parish-or-community</a>, <a data-mention href="../../../data-structure/administrative-and-statistical-units/boundaries/polling-district">polling-district</a>, <a data-mention href="../../../data-structure/administrative-and-statistical-units/boundaries/region">region</a>, <a data-mention href="../../../data-structure/administrative-and-statistical-units/boundaries/regional-authority">regional-authority</a>, <a data-mention href="../../../data-structure/administrative-and-statistical-units/boundaries/upper-tier-local-authority">upper-tier-local-authority</a>, <a data-mention href="../../../data-structure/administrative-and-statistical-units/boundaries/ward">ward</a>, <a data-mention href="../../../data-structure/administrative-and-statistical-units/boundaries/westminster-constituency">westminster-constituency</a></td><td><code>asu-bdy</code></td></tr><tr><td><a data-mention href="../../../using-os-ngd-data/os-ngd-transport">os-ngd-transport</a></td><td><a data-mention href="../../../data-structure/transport/transport-network">transport-network</a></td><td><a data-mention href="../../../data-structure/transport/transport-network/railway-link">railway-link</a>, <a data-mention href="../../../data-structure/transport/transport-network/railway-link-set">railway-link-set</a>, <a data-mention href="../../../data-structure/transport/transport-network/railway-node">railway-node</a></td><td><code>trn-ntwk-railway</code></td></tr><tr><td><a data-mention href="../../../data-structure/water">water</a></td><td><a data-mention href="../../../data-structure/water/water-features">water-features</a></td><td><a data-mention href="../../../data-structure/water/water-features/river-basin-district-catchment">river-basin-district-catchment</a>, <a data-mention href="../../../data-structure/water/water-features/waterbody-catchment">waterbody-catchment</a></td><td><code>wtr-ctch</code></td></tr><tr><td></td><td><a data-mention href="../../../data-structure/water/water-features">water-features</a></td><td><a data-mention href="../../../data-structure/water/water-features/tidal-boundary-continuous-high">tidal-boundary-continuous-high</a> ,<a data-mention href="../../../data-structure/water/water-features/tidal-boundary-continuous-low">tidal-boundary-continuous-low</a></td><td><code>wtr-tidalboundary</code></td></tr></tbody></table>

### Attribution available in OS NGD API – Tiles

The following attribution is available as part of OS NGD API – Tiles:

<table><thead><tr><th width="182">CollectionID</th><th width="213.33333333333331">Layer(s)</th><th>Available Attribution</th></tr></thead><tbody><tr><td><code>ngd-base</code></td><td>All</td><td>osid,<br>description, <br>name1_text  (only applicable to the Named Point, Site and Water Link Set layers),<br>designatedname1_text (only applicable to the Road layer),<br>versionavailablefromdate</td></tr><tr><td><code>asu-bdy</code></td><td>All</td><td><p>osid,<br>description, <br>name1_text (only applicable to the Country layer),<br>name2_text,</p><p>pollingdistrictid (only applicable to the Polling District layer),<br>versionavailablefromdate</p></td></tr><tr><td><code>trn-ntwk-railway</code></td><td><a data-mention href="../../../data-structure/transport/transport-network/railway-link">railway-link</a></td><td>osid,<br>description,<br>railwayuse,<br>operationalstatus, <br>physicallevel,<br>name1_text, <br>versionavailablefromdate </td></tr><tr><td></td><td><a data-mention href="../../../data-structure/transport/transport-network/railway-node">railway-node</a></td><td>osid,<br>description, <br>versionavailablefromdate</td></tr><tr><td></td><td><a data-mention href="../../../data-structure/transport/transport-network/railway-link-set">railway-link-set</a></td><td><p>osid,</p><p>name1_text,</p><p>name2_text,</p><p>versionavailablefromdate</p></td></tr><tr><td><code>wtr-ctch</code></td><td><a data-mention href="../../../data-structure/water/water-features/river-basin-district-catchment">river-basin-district-catchment</a></td><td>osid,<br>riverbasindistrictname,<br>versionavailablefromdate</td></tr><tr><td></td><td><a data-mention href="../../../data-structure/water/water-features/waterbody-catchment">waterbody-catchment</a></td><td>osid,<br>waterbodyname_text,<br>waterbodycategory,<br>versionavailablefromdate</td></tr><tr><td><code>wtr_tidalboundary</code></td><td><a data-mention href="../../../data-structure/water/water-features/tidal-boundary-continuous-high">tidal-boundary-continuous-high</a> </td><td>N/A</td></tr><tr><td></td><td><a data-mention href="../../../data-structure/water/water-features/tidal-boundary-continuous-low">tidal-boundary-continuous-low</a></td><td>N/A</td></tr></tbody></table>

{% hint style="info" %}
The map features do not contain every OS NGD feature type, nor the complete list of attribution available within the feature types that are included; we have purposefully only selected feature types and a subset of attribution from them that are useful for visualisation as this keeps the tiles lightweight and quick to render.&#x20;

The inclusion of unique identifiers (IDs), where available, allows you to cross-reference with the full product, for example, with [os-ngd-api-features](https://docs.os.uk/osngd/getting-started/access-the-os-ngd-api/os-ngd-api-features "mention"). \
\
Find out more about OS NGD [unique-identifiers](https://docs.os.uk/osngd/getting-started/os-ngd-fundamentals/unique-identifiers "mention").
{% endhint %}

## Update frequency

| Collection ID       | Update Frequency                                                       |
| ------------------- | ---------------------------------------------------------------------- |
| `ngd-base`          | Weekly                                                                 |
| `asu-bdy`           | Biannually                                                             |
| `trn-ntwk-railway`  | Monthly                                                                |
| `wtr-ctch`          | Updated as and when updates are received from the authoritative bodies |
| `wtr-tidalboundary` | Monthly                                                                |

{% hint style="info" %}
Although OS NGD API – Tiles will be updated weekly, the data updates are based on the set [currency of the OS NGD collections](https://docs.os.uk/osngd/os-ngd-fundamentals/os-ngd-data-ordering-and-currency#currency-of-os-ngd-data) (for example, the OS NGD Structure Features Collection currency is daily, whereas the OS NGD Water Network Collection currency is monthly).&#x20;
{% endhint %}