System and method for providing route guidance with a navigation application program
US6212474A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1998 |
| Grant date | Apr 3, 2001 |
| Priority date | — |
| Expiry date | Nov 19, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/3629
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A route guidance program and method are disclosed. Maneuver data structures are formed that include data from a geographic database for each location along a route at which a maneuvering instruction is to be provided. These maneuver data structures are used to form a list of tokens. A token can be either a character string or a symbol that refers to another item of data, which can be either a character string, audio data, or graphics data. Maneuvering instructions are provided by explicating the tokens in the list of tokens. Explicating the tokens is done by providing all the data contained in or referred to by the tokens in the order specified in the list of tokens. If the token is a character string, explication includes providing the character string data contained in the token. If the token is a symbol, explication includes providing the data referred to by the symbol, which can be either a character string, audio data, or graphics data. The list of tokens is built by combining sequences of tokens. A sequence of tokens is formed for each of the maneuver data structures. Each sequence of tokens is formed from a output list formed by application of a rules set to the data in the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.