Information terminal and cartographic information providing system
US6430499B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2002 |
| Grant date | Aug 6, 2002 |
| Priority date | — |
| Expiry date | Mar 12, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/26
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An information terminal 1 is provided with a first input section 11, a position detector 12, a first arithmetic operation section 13, a data storage section 15, a first data reader 18, a connection information generator 17, and a first output section 16. The data storage section 15 stores cartographic data having the data structure simplified but capable of recovering information about connection among nodes and links constructing a road network. The connection information generator 17 complements the connection information of the cartographic data. The first arithmetic operation section 13 uses the connection information complemented by the connection information generator 17 to carry out data processing for various purposes, such as route search and position detection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.