News Column

Patent Issued for Apparatus and Method of Producing Map Differential Data

August 19, 2014



By a News Reporter-Staff News Editor at Information Technology Newsweekly -- A patent by the inventors Nomura, Toshio (Chiryu, JP); Suzuki, Takamitsu (Okazaki, JP), filed on July 11, 2012, was published online on August 5, 2014, according to news reporting originating from Alexandria, Virginia, by VerticalNews correspondents.

Patent number 8799246 is assigned to Denso Corporation (Kariya, JP).

The following quote was obtained by the news editors from the background information supplied by the inventors: "US 2010/0030460A1 corresponding to JP 2008-249798A discloses a data distribution apparatus for distributing map differential data to a vehicle navigation apparatus when a map update for updating (e.g., adding or deleting) a map element (e.g., roads) of map data occurs. The map differential data is a difference between pre-update map data and post-update map data.

"In the conventional data distribution apparatus, the map differential data is produced in units of blocks in a map and stacked in chronological order. Assuming that the map differential data is managed by versions, not only map differential data for the latest version of map data but also map differential data for the immediately previous version of map data are required to update the map data to the latest version. Accordingly, the volume of the map differential data distributed to the vehicle navigation apparatus is increased so that communication cost and time necessary to update the map data can be increased. Further, when a road is located over adjacent blocks, both of the blocks need to be updated. If only one block is updated without updating the other block, a road network is not ensured. That is, the road is disconnected in a map displayed on the vehicle navigation apparatus."

In addition to the background information obtained for this patent, VerticalNews journalists also obtained the inventors' summary information for this patent: "In view of the above, it is an object of the present disclosure to provide an apparatus and method of producing map differential data for ensuring a road network and for reducing the volume of the map differential data distributed to a vehicle.

"According to an aspect of the present disclosure, an apparatus includes a map data storage device, a map update device, a determination device, and a data production device. The map data storage device stores map data representing arrangement of map elements. The map update device reflects a first map update of a first map element to a first version of the map data to produce a second version of the map data when the first map update occurs. The map update device reflects a second map update of a second map element to the second version of the map data to produce a third version of the map data when the second map update occurs after the first map update. The determination device determines whether the first map update and the second map update depend on each other by determining whether the first map element and the second map element have a common portion. The data production device produces map differential data from the first map update and the second map update when the determination device determines that the first map update and the second map update depend on each other.

"According to another aspect of the present disclosure, a method includes a step of reflecting a first map update of a first map element to a first version of map data representing arrangement of map elements to produce a second version of the map data when the first map update occurs, a step of reflecting a second map update of a second map element to the second version of the map data to produce a third version of the map data when the second map update occurs after the first map update, a step of determining whether the first map update and the second map update depend on each other by determining whether the first map element and the second map element have a common portion, and a step of producing map differential data from the first map update and the second map update upon determination that the first map update and the second map update depend on each other."

URL and more information on this patent, see: Nomura, Toshio; Suzuki, Takamitsu. Apparatus and Method of Producing Map Differential Data. U.S. Patent Number 8799246, filed July 11, 2012, and published online on August 5, 2014. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=8799246.PN.&OS=PN/8799246RS=PN/8799246

Keywords for this news article include: Denso Corporation, Information Technology, Information and Data Storage.

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Source: Information Technology Newsweekly


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