Method and system for providing map data of navigation device
US10520318B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 5, 2015 |
| Grant date | Dec 31, 2019 |
| Priority date | — |
| Expiry date | Jul 15, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/0969
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed is a method and system for providing map data of a navigation device. The system comprises: a server for comparing, for each mesh, old version map data and new version map data, generating delta data by extracting only changed spatial data from the meshes, and providing an update of the map data compressed and stored in a navigation device on the basis of the delta data; and the navigation device for receiving a delta file and a delta file header from the server, decompressing the compressed file header included in the old version map data, and extracting only the compressed data block included in an update item in the old version map data by referring to the decompressed file header and the delta file header, the navigation device being built in a car.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.