An Integrated Data Model for Spatial-Temporal Trajectories and theSocial Relationships of Moving Objects

Objective In the pan geographic information age,with the development of the SoLoMo(social,localand mobile)modes in the mobile internet industry,how to effectively manage massive location-baseddata,social network and geospatial data has become a major challenge in the moving object databasesfield of research.In this paper,a spatial-temporal integrated data model for moving object trajectoriesand social relationships,called the Geo-Social-Moving(GSM)model,is proposed to manage bothmoving object geographical locations,trajectories and social relationships in an integrated framework.We define a series of common operations including interception,extension,projection and multi-di-mensional projection.Then,the GSM model is implemented based on a graph database system.Weconducted detailed experiments with two free location-based social network datasets from Brightkiteand Gowalla to verified the effectiveness of the GSM model.Results show that the proposed GSMmodel can avoid query inefficiency caused by relational database table joins with the efficiency and sta-bility to provide support for location-based social network applications.