The role of location and social strength for friendship prediction in location-based social networks.

•A taxonomy for friendship prediction methods for location-based social networks is proposed.•Five new methods for friendship prediction in location-based social networks are proposed.•A comprehensive analysis of selected current methods on link prediction for LBSNs is carried out.•From a set offifteen friendship prediction methods, we identified the top-5 methods with feasibility for real-world applications. Two of our proposals are in this top-5.