Known limitations

There are two known limitations for Street Light data:

• Street Light Completeness: Street Lights have been captured from aerial imagery and therefore there are some limitations to completeness. Where features are not visible from aerial imagery (for example, where obscured by tree cover or not visible due to urban shading), these will not be included.

• Overlighting and Underlighting: Street Light coverage attribution on Road Links and Path Links is indicative only, and there may be some instances of overlighting and underlighting. An algorithm is used to give an indication of how well-lit a link is; this algorithm is based on an inferred light radius and does not account for information such as the height of a lamp post, the type of bulb, or the presence of any light-blocking obstructions or buildings.