×

Geographic data transmitting method, information delivering apparatus and information terminal

  • US 7,339,496 B2
  • Filed: 10/01/2003
  • Issued: 03/04/2008
  • Est. Priority Date: 10/01/2002
  • Status: Expired due to Fees
First Claim
Patent Images

1. A map data transmission method comprising:

  • determining a recommended route extending from a current position to a destination;

    extracting map data that include road shape information indicating shapes of roads and road connection information indicating conditions with which the roads connect with one another, over a slicing range set within a predetermined distance from the determined recommended route;

    making a decision as to whether or not the road connection information is to be eliminated from the extracted map data based on;

    (1) whether the extracted map data correspond to;

    a) an urban area,b) an area with good GPS reception, orc) a road which does not connect with the recommended route;

    or (2) whether an estimated total data size of the extracted ma data is greater than a predetermined value; and

    transmitting the road shape information of the roads without corresponding road connection information if results of the decision indicate that the road connection information is to be eliminated.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×