Graphical user interface and display process for data segments in a computer database

A flexible navigational tool for a database is provided by using display objects for segments in the database which have visual characteristics based on values computed from database variables of entities in the segments. The visual characteristics include the size, position and appearance of the display objects. These visual characteristics may be determined according to segment values such as a segment aggregate for a database variable or a statistical measure associated with a segment which indicates the likelihood of whether an entity in the segment meets target conditions.