Open WiFi 2018: distribution by zone of connected, new and recurring devices

The dataset aggregates daily values using a column by zone. The zones from 1 to 9 correspond to the 9 administrative municipalities of Milan, zone 10 instead corresponds approximately to a strip that goes from Piazza Castello to San Babila, and does not include zone 1 repeaters. The columns marked by ALL report the daily totals. The values of the ALL.returning devices column do not correspond to the sum of the corresponding columns of zone.returning because a device could cross multiple zones on the same day.本数据集按区域维度对每日数值进行聚合统计。区域1至9对应米兰的9个行政自治市；区域10则大致对应从城堡广场（Piazza Castello）至圣巴比拉（San Babila）的带状区域，且不包含区域1的中继设备。标记为`ALL`的列代表每日总数值。`ALL.returning devices`列的数值并非各区域对应`zone.returning`列的数值之和，原因在于同一台设备可在单日跨越多个区域。