Method of obtaining a three-dimensional map representation and navigation system
AssigneeSiemens Aktiengellschaft
InventorDieter Ritter
Life of this patent
Estimating the term…
Abstract
In a method for obtaining a three-dimensional map representation for a navigation system from digital, two-dimensional road map data, the road map data for a field of view that is to be represented and has a predetermined visual range are curved in a radially symmetric fashion about a virtual viewpoint by means of a polynomial transformation. A navigation system suitable for generating such a map representation is distinguished by a conversion unit with the aid of which two-dimensional road map data can be transferred into a view curved in a radially symmetric fashion.
Claims10
A method for obtaining a three-dimensional map representation for a navigation system from two-dimensional road map data having a network of road segments, comprising:
- obtaining a field of view from the two-dimensional road map data, wherein the field of view is determined by a plane in a form of a sector of a circle around a virtual viewpoint, and a radius of the circle corresponds to a predetermined visual range;
- and
- transforming the plane into a third dimension using a polynomial function such that the plane is concave in shape the polynomial function being
- z=Σiai*ri;
- r=[(x−xp)+(y−yp)2]1/2.
A navigation system, comprising:
- a display device;
- a position-determining unit;
- a storage medium on which two-dimensional road map data is stored with the aid of a network of road segments;
- and
- a conversion unit to convert from the two-dimensional road map data a field of view, which is determined by a plane in a form of a sector of a circle around a virtual viewpoint, wherein a radius of the circle corresponds to a predetermined visual range, into a three-dimensional view by using a polynomial function such that the plane is concave in shape, the polynomial function being
- z=Σiai*ri;
- r=[(x−xp)+(y−yp)2]1/2.
Dependencies are inferred from the claim text.