Patent ID: 8195383

Claim:
A system for controlling a display of geographic data to assist in navigation of a mobile platform, the system comprising: a graphical user interface module that generates at least one of a primary display and a context display, and receives at least one user input; the user input enabling a user to provide geographic data relating to a planned route of travel of the mobile platform, to the graphical user interface module for assisting in the navigation of the mobile platform; an image control module responsive to the geographic data for generating primary display data used to generate a primary display on a display screen that has a first magnification level, the primary display covering an entirety of the display screen; and the image control module further operating to determine whether the primary display shows all of the geographic data, and when the primary display is only able to display a portion of the planned route of travel on the display screen as the primary display, at least in part as a result of a magnification level being used with the primary display, the image module generates a context display that is presented on the display screen as an overlay on the primary display, without substantially affecting a visual presentation of information forming the primary display, the context display displaying an entirety of the planned route of travel at a second magnification level that is less than the first magnification level, and the display window context display occupying only a subportion of the display screen; the context display further including an indicator to indicate that specific portion of the context display that is being displayed as the primary display, and wherein dimensions of the indicator are controlled at least in part on a magnification level selected for use with the primary display such that dimensions of the indicator are enlarged or reduced in size to indicate, on the context display, that portion of the primary display that is being presented on the context display; the image control module further being adapted to remove the context display from the primary display when it is determined that, as a result of a magnification level selected for use with the primary display, all of the user provided geographic data is able to be displayed in the primary display; wherein positioning of the indicator is also controlled in accordance with panning of an image displayed in the primary display; and wherein the indicator in the context display is able to be panned, which causes a corresponding panning of the primary display such that information presented within an area defined by the indicator is presented in the primary display.