×

Apparatus for displaying travel path

  • US 4,963,865 A
  • Filed: 03/16/1987
  • Issued: 10/16/1990
  • Est. Priority Date: 03/14/1986
  • Status: Expired due to Term
First Claim
Patent Images

1. An apparatus for displaying a travel path of a running body in which a constantly changing location of the running body on two-dimensional coordinates is successively computed and the current location of the running body is displayed successively, in accordance with the data thus computed, on a display screen having a map previously displayed thereon, comprising:

  • means for registering as known factors longitude and latitude values of reference points, each of which is formed by an intersection point of a mesh consisting of lines of longitude and latitude on the map, the map having divided areas;

    means for converting the current location of the running body on the two-dimesional coordinates to a position on latitude-longitude coordinates;

    means for calculating the current location on the map, on the basis of the known latitude-longitude values of a reference point on the map displayed on the display screen; and

    means for displaying the current location on the display screen,wherein the latitude-longitude of a position of a target point set on a map displayed on the display screen is calculated from the reference point of the map and means is provided to obtain and display a distance between the current location of the running body and the target point from a difference in position between latitude-longitude coordinates of the current location of the running body displayed on the map of one area and of the target point displayed on the map of another area.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×