Using Sound to Represent Uncertainty in Address Locations

All spatial data have positional uncertainty, which sometimes users ignore. There are a number of different ways of representing these data visually, but they have limitations which can be addressed by utilising non-visual methods. This study uses piano notes to represent spatial uncertainty in Ordnance Survey Address Layer 2 (AL2) data, and was evaluated by 49 spatial data users using computer based evaluations and discussion sessions.