Radar or a mini-map is a miniature map that is often placed at a screen corner in video games to aid players in orienting themselves within the game world. They are often only a small portion of the screen and thus must be selective in what details they display. Elements usually included on Mini-maps vary by video game genre. However, commonly included features are the position of the player character, allied units or structures, enemies, objectives and surrounding terrain.
Zoom - Rotation
In some 3D video games the mini-map rotates when the player character or game camera faces different directions, to keep the top of the map always corresponding to forward from the cameras point of view, this is common for games in the Grand Theft Auto series, and many racing games which show the track in a mini-map
Auto-map is a minimap used for navigation, it is bigger and uses the top-down view.