Table 2 Spatial features characterising individual’s activity patterns. The node degree (a) is equivalent to the location visiting frequency
Type | Feature | Description | |
|---|---|---|---|
Geographical characteristics | \(r_{g}\) (km) | Radius of gyration | Travel distance range weighted by the visiting frequency. |
\(D_{o}\) (km) | Location distance variance | Geographical dispersion degree of visited locations. | |
d (km) | Mean trip distance | Average distance between two consecutive geotagged tweets. | |
Network properties | C̅ (−) | Clustering coefficient | To which degree the visited locations are connected together. |
z (−) | Mean node degree a | Overall visiting frequency. | |
\(z_{m}\) (−) | Max node degree divided by the sum of total degrees | Degree of how centralised the overall visited locations are by visiting frequency. | |