Location-based analytic platform and methods

A method of learning an audience member function, the method comprising:

• obtaining, with one or more processors, a training set of geographic data describing geolocation histories of a plurality of mobile devices, wherein members of the training set are classified according to whether the respective member of the training set is a member of an audience;
• retrieving, with one or more processors, attributes of geolocations in the geolocation histories from a geographic information system;
• learning, with one or more processors, feature functions of an audience member function based on the training set, wherein at least some of the feature functions are a function of the retrieved attributes of geolocation, wherein the feature functions are learned, at least in part, by calculating a plurality of impurity measures for candidate feature functions and selecting one of the candidate feature functions based on the relative values of the impurity measures;
• and
• storing, with one or more processors, the feature functions of the audience member function in an audience repository.