Fig. 5.

The rule for determining activity purposes based on spatial features measured by proportions and using POI data as an example: (a) indicates a typical residential area, (b) indicates an area with a large office building, and (c) indicates an area around a hospital. The text below each circle indicates the proportions of the types of POIs. Note that residential houses and companies relate to “Home (H)” and “Work (W)” activities, respectively, while retail stores and drugstores correspond to “Leisure (L)” and “Other (O)” activities, respectively, in this figure.