Geographic information system
US6389356B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 2, 2000 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Jun 2, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/3874
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Records related to objects are stored in a map database (10) in ascending order of occurrences of the objects or in descending order of extinction of the objects. When objects available on a specified date are extracted, the date of the occurrences or extinction of the objects in the records are ascertained sequentially from the top. This ascertaining process is cancelled regarding the objects appearing after the specified date, or regarding the objects disappearing before the specified date. Objects seasonally available or available depending on the weather and temporary traffic regulations to be carried out irregularly are stored in the map database (10) by an operator or through a communication from a traffic control center. Those objects and regulations are not indicated on a calendar due to their irregularity. The objects agreeing with a condition can be extracted, or roads available are selected to form a passable route.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.