| Summary: | Thanks to the increasing popularity of location-based social networks, a large amount of user-generated geo-referenced check-in data is now available, and such check-in data is becoming a new data source in the study of mobility and travel. Conventionally, spatial interactions between places were measured based on the trips made between them. This paper empirically investigates the use of social media data (i.e., Foursquare data) to study the “locality” of such intra-urban spatial interactions in New York City, and specifically: (i) the level of “locality” of spatial interactions; (ii) the impacts of personal characteristics on “locality” of spatial interaction and finally; (iii) the heterogeneity in spatial distribution of “local” interactions. The results of this study indicate that: (1) spatial interactions show a high degree of locality; (2) gender does not have a considerable impact on the locality of spatial interactions and finally; (3) “local” interactions likely cluster in some places within the research city.
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