Patent ID: 8650499

Claim:
A method of managing the display of overlay information in one or more views, the method comprising the steps of: receiving a user selection of one or more item types from a plurality of item types selectively displayable together in the same geographic chart view on a display; receiving a user selection of an altitude from which to represent a current geographic chart view; determining whether one or more overlay items are available for display in the current geographic chart view, a given overlay item being available for display if the item is included in the overlay information for the current view and visible if scaled in the current view in accordance with the altitude selected by the user for the current view; for each overlay item available for display in the current view, determining whether the available overlay item has an item type currently selected for display; and for each available overlay item having a currently selected item type, including the available overlay item for display in the current view; displaying an item type of each available overlay item being displayed on the display in a legend, within a subportion of the display, simultaneously, on the display; the method further comprising: omitting from the legend any currently selected item type for which it is determined in the determining operation that no overlay item is available for display in the current view being displayed on the display; and using a processor to alter a transparency of the overlay item being displayed from one intermediate level to a different intermediate level over a plurality of the views preceding the current view, based on at least a current view scale of the current view as selected by the user, and further altering an appearance of the item type corresponding to the overlay item being displayed in the legend such that display characteristics of the item type match those being used on the corresponding overlay item; and the method being performed by a processor configured with memory.