Map data storage device, map data updating method, and computer program
US9869558B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 9, 2014 |
| Grant date | Jan 16, 2018 |
| Priority date | — |
| Expiry date | Jun 12, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/3896
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A map data storage device, a map data updating method, and a computer program that can shorten the time required for a map data updating process. In the case where map data stored in a navigation-side local DB of a navigation apparatus are to be updated, the navigation apparatus updates the map data stored in the navigation-side local DB on the basis of map updating data received from a map distribution center, and prepares a data reference index that associates a PID (universal identification information) included in the map data with a record number (internal identification information) included in the map data on the basis of the updated map data. After that, in the case where an application is executed by the navigation apparatus, the prepared data reference index is referenced to access the map data stored in the navigation-side local DB.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.