A method for inferring activities to a user is provided. The system receives at least one location trace and corresponding contextual information. The system then derives a set of venues based on a venue database, wherein a respective hypothetical visit is associated with the contextual information corresponding...http://www.google.com/patents/US7984006?utm_source=gb-gplus-sharePatent US7984006 - Learning a user's activity preferences from GPS traces and known nearby venues
