Fig. 13From: Heuristics for spatial finding using iterative mobile crowdsourcingNoise map and its abstract version. a Noise map from http://urbanobservatory.org/compare/index.html (NoiseWatch) around London, red and orange triangles indicate high noise levels. b Abstracted discretized view of noise map with \(\alpha\) = 0.030657748 with 69 × 52 regions;1s representing high noise regionsBack to article page