Fig. 9From: Heuristics for spatial finding using iterative mobile crowdsourcingCoverage map and its abstract version. a 3G/4G coverage map from http://opensignal.com/ of a part of New York city, of size roughly 10 by 8 km; orange regions have 3G/4G coverage. b Abstracted discretized view of coverage map with \(\alpha = 0.1784138191905182\) with103 × 77 regions, each region corresponding to roughly 100 by 100 m; 1s representing regions with coverageBack to article page