Patent ID: 9019302
Filing Date: 2015-04-28
Classification: G01C

Abstract:
1. A method for generating a display image for a navigation device, wherein the display image includes a map view for display on the navigation device and the map view comprises a two dimensional plan view, the method comprising: identifying, using a processor, a plurality of map objects from a digital map for display in a display image on a navigation device, each of the map objects comprising a set of coordinate data points that together define a polygon; identifying, using the processor, an outermost boundary defined by at least part of the set of coordinate data points; determining, using the processor, that said map object includes one or more non-visible features if said set is determined to include any further coordinate data points within said boundary, non-visible features being features that are not visible to a user at ground level outside of the boundary; generating, using the processor, an adapted set of map objects that does not include any of said non-visible features; and generating, from said adapted set of map objects, a simplified display image for display on the navigation device, wherein said simplified display image does not include any of said non-visible features, using the processor.