> For the complete documentation index, see [llms.txt](https://docs.os.uk/os-downloads/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/os-downloads/products/land-and-terrain-portfolio/os-mastermap-sites-layer/os-mastermap-sites-layer-technical-specification/enumerations/reasonforchangevalue.md).

# ReasonForChangeValue

### RoutingPoint feature

The ‘reasonForChange’ attribute is used across all features found within the OS MasterMap Sites Layer.

Defines the reason for a change made to a feature.

| Value        | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                |
| ------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| New          | This is a new feature in the database.                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| Modified     | <p>The feature has been edited by an operator. Used in the following cases:</p><p>1. The geometry of a topographic feature is changed following real-world change (applicable to point, line and text features only and not polygons).</p><p>2. The geometry of a non-topographic feature, for example, inferred link or BoundaryLine feature is changed.</p><p>3. A cartographic symbol feature is repositioned.</p><p>4. A CartographicText feature is repositioned.</p> |
| Reclassified | The descriptive attributes of a feature have changed. The feature code may have changed.                                                                                                                                                                                                                                                                                                                                                                                   |
| Attributes   | Applied to features that have had only attributes changed, except those covered by TextChange and Reclassified values.                                                                                                                                                                                                                                                                                                                                                     |
| Position     | Feature has changed geometry and/or position due to an improvement in its absolute accuracy; that is, its relationship to the National Grid (relevant for the positional accuracy improvement programme which is now complete). This type of feature change is not associated with real-world change.                                                                                                                                                                      |
| Software     | Feature has been adjusted by an automatic software process. Includes geometric adjustment, cleaning, squaring, paralleling (text and lines) and reversing direction of digitising.                                                                                                                                                                                                                                                                                         |


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