Multi-mode route guidance system and method therefor
US5412573A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 1993 |
| Grant date | May 2, 1995 |
| Priority date | — |
| Expiry date | May 20, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/367
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A multi-mode route guidance system and a corresponding method for same include a device to determine a present position, preferable a GPS receiver, and an input device (111) for inputting a traveler specified destination position. A map database (115) provides memory capable of storing a first, or topology, type of record (225) that has topology and connectivity information (227), and a second, or route guidance, type of record (217) that has topology, connectivity, and traffic flow restriction information (227, 229). A route guidance device (101) retrieves selected records (217, 219, 221, 223, 225) from the map database (115). The selected records (217, 219, 221, 223, 225) retrieved are determined by the specified destination position and the present position of the traveler. The route guidance device (101) uses a selected record of the first type (225) to provide ground track guidance cues (601) to the traveler, and a selected record of the second type (217) to provide maneuver instruction guidance cues (501) to the traveler. Other system features include partial route planning for generating guidance instructions for guiding the traveler to an intermediate position (941) nearest…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.