What usgs stand for and what do they do? The United States Geological Survey/service were and are the cartographers that converted early maps into the GPS location system known today. Edit
Medical Definition of EGOCENTRIC. 1. : limited in outlook or concern to one's own activities or needs.
The Ego (or I). Initially the ego is ' that part of the id which has been modified by the direct influence of the external world ' (Freud 1923). The ego develops in order to mediate between the unrealistic id and the external real world. It is the decision making component of personality.