The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 31, 2019
Filed:
Jun. 05, 2015
Engis Technologies, Inc., Seoul, KR;
Yong Sun Park, Seoul, KR;
ENGIS TECHNOLOGIES, INC., Seoul, KR;
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.