Fig. 5

Parking map and its abstract version. a Parking map from http://sfpark.org/resources/parking-census-data-context-and-map-april-2014/, of size roughly 1 by 0.7 km; pink regions have parking spaces. b Abstracted discretized view of parking map with \(\alpha = 0.2076923076923077\) with 26 × 20 regions, each region corresponding to roughly 37 by 37 m; ‘1’s representing regions with parking spaces.