Bird's-eye view forming method, map display apparatus and navigation system
US6141014A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 17, 1996 |
| Grant date | Oct 31, 2000 |
| Priority date | — |
| Expiry date | Apr 17, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09B29/106
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A map display apparatus for displaying perspective image of a map. The apparatus includes an image display device for displaying the perspective image of the map and a map data storage device for storing map data. Map drawing means is included for preparing map drawing data using the map data and for displaying a perspective image of the map on the display device on the basis of the drawing data. The map drawing means transforms coordinate data of a map into data suitable for display of the perspective image of the map. The data transformation is accomplished by perspectively projecting the coordinate data onto a predetermined projection plane with a view point at a desired position. The projection plane is determined on the basis of two predetermined points in the map data, such as the current position of a vehicle and the destination, so that drawing positions of the two points after the perspectively projecting operation are coincident with predetermined positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.