| Key | Value | 
| barrier | yes | 
| check_date | 2021-07-09 | 
| fixme:perimeter | There's a modern wire fence running around the edge of the wall, very likely for safety as the fall is a several-metre sheer drop. | 
| note:source | Tagging this way is intentional, having given it serious thought. Trawling through changeset history while out surveying is impractical. History metadata isn't readily available in surveying editors, yet. | 
| source:geometry | Esri World Imagery (Clarity) Beta; survey | 
| source:name | survey; sign | 
| source:start_date | survey; sign | 
| start_date | 1837 | 
| survey:date | 2021-07-09 |