Map display device
US5297051A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1992 |
| Grant date | Mar 22, 1994 |
| Priority date | — |
| Expiry date | Mar 10, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/3673
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An on-board navigation apparatus constantly displays characters of name data associated with geographical data in legible order and direction whenever the display direction is changed to one of the north, south, east, and west directions. In operation, after the geographical data and associated name data in a desired region are read, name reference point and name area of the read name data is retrieved, and display direction of map orientation is retrieved. Coordinates of a drawing start point are then calculated on the basis of absolute coordinate of name reference point in accordance with the display direction. Correspondence between absolute coordinates of the geographical data and the coordinates of the drawing start point of the name data is established, and the name data is written into the name area so that the geographical data and the name data are stored while being superimposed with each other, thereby forming map data. The display is performed on the basis of the map data produced by the superimposition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.