# roofconfidenceindicatorvalue

This code list is used in association with the Roof Material Confidence Indicator and Roof Shape Aspect Confidence Indicator attributes, which are present within the Building Feature Type. The code list provides a qualitative assessment of the confidence of the roof attribute values.

| Label                                           | Definition                                                                                                                                                                                                                                                                                                                |
| ----------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Complex Roof                                    | The roof shape, aspect, or composition of materials was detected as being overly complex, which may affect the reliability of the output from the automated process.                                                                                                                                                      |
| Existing Building Changed Since Imagery Capture | The geometry of the building has changed since the imagery and height data were captured, which may affect the reliability of the output from the automated process, depending on the extent of the real world change.                                                                                                    |
| Expected Data Output                            | The output follows the normal expected process, either the automated process where there were no indications that the quality is lower than expected, or one or more of the values were manually captured.                                                                                                                |
| Insufficient Building Size                      | The building geometry is less than 8 square metres in size, which is an insufficient size for accurately determining the roof material, shape and aspect from imagery and height data.                                                                                                                                    |
| New Building Surveyed After Imagery Capture     | The building was surveyed after the imagery and height data were captured, so the roof attributes will not be derived until new imagery and height data are available.                                                                                                                                                    |
| Obscured Roof                                   | Some or all of the roof is obscured by overhanging vegetation or is in shadow, for example, in an urban ‘canyon’.                                                                                                                                                                                                         |
| Uncertain Data Output                           | The roof information that has been derived contains data that either has a high numerical standard deviation or that contradicts an expected data output. For example, large variation in aspect values for a given roof face or unexpected data combinations, such as fabric roofs containing solar panel installations. |


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