Map viewer and method
First Claim
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1. A map viewer for displaying a three-dimensional, 3d, map view of a 3d geographical map, the map viewer comprising:
- a database storing data which defines the 3d geographical map, wherein said data comprises at least one of 3d elements, 3d polygons, or wireframes, wherein the database stores the data in a layered hierarchy comprising data layers which can be individually rendered for the 3d map view, wherein the database comprises at least the following data layers;
a data layer of a digital terrain model which is modelling a terrain surface, anda data layer of a 3d road network comprising 3d road elements;
a processor for rendering the 3d map view and coupled to the database, the processor being configured to;
select specific data layers of the database in response to a resolution setting of the 3d map view, wherein the resolution setting of the 3d map view and the selection of the specific data layers of the database are based on a current position of a vehicle in which the map viewer is located, andrender the 3d map view using the selected specific data layers of the database; and
an optical output device, configured for displaying the rendered 3d map view.
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Abstract
Techniques for displaying a 3d map view of a 3d geographical map are provided. A database stores data which defines the 3d geographical map in a layered hierarchy comprising data layers which can be individually rendered for the 3d map view. The database comprises a data layer of a digital terrain model which is modelling a terrain surface and a data layer of a 3d road network comprising 3d road elements. A processor is configured for selecting specific data layers of the database in response to a resolution setting of the 3d map view and to render the 3d map view using the selected specific data layer.
32 Citations
18 Claims
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1. A map viewer for displaying a three-dimensional, 3d, map view of a 3d geographical map, the map viewer comprising:
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a database storing data which defines the 3d geographical map, wherein said data comprises at least one of 3d elements, 3d polygons, or wireframes, wherein the database stores the data in a layered hierarchy comprising data layers which can be individually rendered for the 3d map view, wherein the database comprises at least the following data layers; a data layer of a digital terrain model which is modelling a terrain surface, and a data layer of a 3d road network comprising 3d road elements; a processor for rendering the 3d map view and coupled to the database, the processor being configured to; select specific data layers of the database in response to a resolution setting of the 3d map view, wherein the resolution setting of the 3d map view and the selection of the specific data layers of the database are based on a current position of a vehicle in which the map viewer is located, and render the 3d map view using the selected specific data layers of the database; and an optical output device, configured for displaying the rendered 3d map view. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of displaying a three-dimensional, 3d, map view of a 3d geographical map on a map viewer, the method comprising:
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retrieving data which defines the 3d geographical map from a database, wherein said data comprises at least one of 3d elements, 3d polygons, or wireframes, wherein the retrieved data is stored in the database in a layered hierarchy comprising data layers which can be individually rendered for the 3d map view, wherein the retrieved data comprises at least the following data layers; a data layer of a digital terrain model which is modelling a terrain surface; and a data layer of a 3d road network comprising 3d road elements; selecting, using one or more computer processing, specific data layers of the retrieved data in response to a resolution setting of the 3d map view, wherein the resolution setting of the 3d map view and the selection of the specific data layers of the database are based on a current position of a vehicle in which the map viewer is located; rendering the 3d map view using the selected specific data layers of the retrieved data; and transmitting for display the rendered 3d map view on an optical output device. - View Dependent Claims (15, 16)
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17. A method of generating a database on a map viewer for storing data which defines a three-dimensional, 3d, geographical map, the method comprising:
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receiving digital map data, the digital map data comprising a digital terrain model which is modelling a terrain surface and a 3d road network comprising 3d road elements, storing in the database in a first data layer the data of the digital terrain model; and storing in the database in a second data layer the data of the 3d road network, wherein said data which defines the 3d geographical map comprises at least one of 3d elements, 3d polygons, or wireframes, wherein the data layers can be individually rendered in a 3d map view, wherein specific data layers are selected for rendering and displaying in response to a resolution setting of the 3d map view, wherein the resolution setting of the 3d map view and the selection of the specific data layers of the database are based on a current position of a vehicle in which the map viewer is located. - View Dependent Claims (18)
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Specification