초록 ▼

In a method for obtaining a three-dimensional map representation for a navigation system from two-dimensional road map data, road segments to be represented are linked with the aid of three-dimensional topological data. The navigation system has a conversion unit for converting the two-dimensional r

In a method for obtaining a three-dimensional map representation for a navigation system from two-dimensional road map data, road segments to be represented are linked with the aid of three-dimensional topological data. The navigation system has a conversion unit for converting the two-dimensional road map data and the three-dimensional road topological data into a three-dimensional map representation.

대표청구항 ▼

1. A method for obtaining a three-dimensional map representation for a navigation system, which comprises: providing a road map database containing two-dimensional map data having a network of road segments represented by points; interconnecting the road segments by nodes and assigning geocoordi

1. A method for obtaining a three-dimensional map representation for a navigation system, which comprises: providing a road map database containing two-dimensional map data having a network of road segments represented by points; interconnecting the road segments by nodes and assigning geocoordinates to the nodes; providing a separate geotopology database containing three-dimensional topological data; linking the road segments to be represented with the separate geotopology database; generating display data by determining associated points of the three-dimensional topological data for the nodes of the road segments to be output; and subsequently outputting the display data onto a display device and plotting the road segments between the determined associated points. 2. The method according to claim 1, which comprises: connecting the road segments to one another at nodes, the nodes being assigned geocoordinates in the road map database and associated points of the three-dimensional topological data are determined for the nodes of the road segments to be output; and plotting the road segments between the associated points determined in the topological data. 3. The method according to claim 2, which comprises multiplying a coordinate of the associated points, which is responsible for a representation of height, in each case by a factor >1. 4. The method according to claim 2, which comprises assigning textures stored in a texture database and have a raster of the geocoordinates to the three-dimensional topological data. 5. The method according to claim 2, which comprises assigning objects to the three-dimensional topological data in accordance with the geocoordinates as three-dimensional geometrical bodies. 6. The method according to claim 1, which comprises providing the road segments with boundary lines, and distorting the boundary lines into a curved course in a region of juxtaposed road segments. 7. The method according to claim 1, which comprises curving the road map data to be displayed, for a field of view with a predetermined visual range, in a radially symmetric fashion around a virtual viewpoint by using a polynomial transformation in a case of intensive enlargement and in downtown areas. 8. The method according to claim 7, which comprises using the navigation system to continuously determine the virtual viewpoint, and displacing the field of view synchronously with the virtual viewpoint. 9. A navigation system, comprising: a display device; a position-determining unit; at least one storage medium for storing a road map database with two-dimensional road map data of a network of road segments; a geotopology database containing three-dimensional topological data; and a conversion unit receiving and converting the road segments of said two-dimensional road map database and the three-dimensional topological data of said of geotopology database into a three-dimensional road map representation, said conversion unit connected to said display device for displaying the three-dimensional road map representation.