Patent ID: 7933716

Claim:
A method for providing an aircraft navigation display, comprising: in either order, obtaining current latitude and longitude Φ 1 ,λ 0 of the aircraft, and obtaining the desired range R to be covered by the navigation display at least in the forward direction of the aircraft; then reading electronic map data for an area of approximate radius R around (φ 1 ,λ 0 ) in at least the forward direction of the aircraft, wherein the map data file includes topographical features associated with each electronic map data spatial coordinate; converting the electronic map data spatial coordinates to spatial coordinates of an azimuthal equidistant projection (AEP) so that the topographical features are now associated with said AEP spatial coordinates; and sending the converted map data and associated topographical features in AEP spatial coordinates to a display to be presented in AEP relationship to Φ 1 ,λ 0 .