Loading patent…
OwnerYoshinori Endo, Toshio Fujiwara +5inventors
InventorsYoshinori Endo, Toshio Fujiwara, Hiroyuki Satake, Hiroshi Shojima, Norimasa Kishi, Masaki Watanabe, Motoki Hirano
Estimating the term…
In a navigation system using a bird's-eye view display mode, map data on a plan view map are subjected to a perspective projection conversion to obtain drawing data on a bird's-eye view map. In this case, an input of the position of a view point is accepted, and a projection plane for a bird's-eye view is determined on the basis of the coordinates of a current position and a destination and the position of the view point so that the display positions of the two points which have been subjected to perspective-projection conversion are coincident with predetermined positions. Alternatively, an input of a scale is accepted, and the position of the view point and the projection plane are determined on the basis of the coordinates of the two points and the scale so that the display positions of the two points after the perspective projection conversion are coincident with predetermined positions and the drawing scale is coincident with the input scale. Or, as a further alternative, an input of the projection angle is accepted, and the projection plane is determined on the basis of the projection angle and the position of the view point.
A map display apparatus comprising:
A map display apparatus comprising an image display device, map storing means for storing map data to display a map, and map drawing means for preparing drawing data of said map by using said map data read out from said map storing means and displaying a map image on said image display device on the basis of the drawing data, wherein the map data contain data of character strings, and wherein said map drawing means includes means for setting display priority ranks of the character strings, and character rearranging means for displaying a character string having the highest display priority rank of overlapped character strings when the display positions of said character strings are overlapped with one another on a display map.
A navigation system comprising an image display device, map storing means for storing map data to display a map, map drawing means for preparing drawing data of said map by using said map data read out from said map storing means and displaying a map image on said image display device on the basis of the drawing data, and current position recognizing means for recognizing a current position, wherein said map drawing means includes coordinate transforming means for transforming coordinate data contained in the map data, and said coordinate transforming means includes perspective projection means for perspectively projecting the coordinate data contained in the map data onto a predetermined projection plane with a view point at a desired position, to thereby prepare the drawing data of a bird's-eye view.
A bird's-eye view forming method for preparing drawing data of a map represented in a bird's-eye view display mode with map data, characterized in that coordinate data contained in the map data are perspectively projected onto a predetermined projection plane with a view point at a desired position to thereby prepare the drawing data of a bird's-eye view.
Dependencies are inferred from the claim text.