> 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/code-lists/code-lists-overview/roofshapevalue.md).

# roofshapevalue

This code list is used in association with the Roof Shape attribute which is present within the Building Feature Type. The code list provides a list of possible roof shape values.

| Label   | Definition                                                                                                                                                                                                                                                                                           |
| ------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Flat    | The roof is predominantly comprised of faces with a pitch value of <= 15°.                                                                                                                                                                                                                           |
| Mixed   | The roof is comprised of multiple faces, with different pitch and aspect values. There is no one predominant roof shape for the building as there are near equal area values of flat (<= 15°) or pitched (> 15°) roof faces.                                                                         |
| Pitched | The roof is predominantly comprised of faces with a pitch value of > 15°.                                                                                                                                                                                                                            |
| Unknown | The shape could not be determined, for example, due to obscuring vegetation or roof furniture. This value is also applied if the building was surveyed after the imagery and height data were captured, so the roof shape value will not be derived until new imagery and height data are available. |


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