1. A method for relationship modeling and visualization from social media, the method comprising: determining a relationship type of a network-based relationship, between an individual and a network contact of the individual, from at least one social media data source, the relationship type determined using a relationship model based on relationship types comprising operational, personal, and business; performing timeline based relationship strength segmentation using Group Lasso, the timeline based relationship strength segmentation specifying a past and current strength of the relationship; predicting a future strength of the relationship using Extended Kalman Filter; and providing, through a visual interface, interactive visual analytics to view and monitor relationship states including the past, current, and future strengths over time.