# positionalaccuracyvalue This code list is used in association with the Positional Accuracy attribute which is present within multiple feature types in the OS NGD Address Theme*.* The code list describes the quality of position for an address coordinate in the real world and the conditions under which an address coordinate will be assigned each value. {% tabs %} {% tab title="v2.0" %} V2.0 of the code list was released on 30 September 2025. ### What's new? The Low Accuracy label is now in title case (it incorrectly appears in sentence case in v1.0 of the code list, i.e. Low accuracy). \ The new value has a 'new' emoji (🆕) against it. | Label | Definition | | ------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Central Internal Position | The address seed is contained within a Building and within 2.5m of its calculated centre or the seed is in the best possible position based on the nature of the premises, for example, Development Land, House Boat, Wind Farm. | | General Internal Position | The address seed is contained with a Building but is more than 2.5m away from its calculated centre or the seed is in an internal position based on the nature of the premises, for example, Development Land, House Boat. | | :new: Low Accuracy | This address seed has been captured to a low level of accuracy and has been marked for priority review to be updated as a priority. | | Postcode Unit Position | The address seed has been captured to Postcode Unit level. It will be updated when more information becomes available. | | Street Location | The address seed is plotted in accordance with the declared street start or end coordinates. Note this is the highest accuracy possible for Street Records. | | Transitional Position | The address seed has been changed from provisional to live in the last six months. It has been captured to a high level of positional accuracy, but the topographic feature is not yet captured. Note the address seed will only be moved pending any imminent mapping updates. | | {% endtab %} | | {% tab title="v1.0" %} V1.0 of the code list was released on 02 November 2022. | Label | Definition | | ------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | Central Internal Position | The address seed is contained within a Building and within 2.5m of its calculated centre or the seed is in the best possible position based on the nature of the premises, for example, Development Land, House Boat, Wind Farm. | | General Internal Position | The address seed is contained with a Building but is more than 2.5m away from its calculated centre or the seed is in an internal position based on the nature of the premises, for example, Development Land, House Boat. | | Low accuracy | This address seed has been captured to a low level of accuracy and has been marked for priority review to be updated as a priority. | | Postcode Unit Position | The address seed has been captured to Postcode Unit level. It will be updated when more information becomes available. | | Street Location | The address seed is plotted in accordance with the declared street start or end coordinates. Note this is the highest accuracy possible for Street Records. | | Transitional Position | The address seed has been changed from provisional to live in the last six months. It has been captured to a high level of positional accuracy, but the Topographic feature is not yet captured. Note the address seed will only be moved pending any imminent mapping updates. | | {% endtab %} | | | {% endtabs %} | | --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.os.uk/osngd/code-lists/code-lists-overview/positionalaccuracyvalue.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.