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Method for the perspective display of a part of a topographic map, and device suitable for performing such a method

  • US 5,161,886 A
  • Filed: 11/18/1991
  • Issued: 11/10/1992
  • Est. Priority Date: 01/11/1989
  • Status: Expired due to Term
First Claim
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1. A method for the perspective display of a portion of topographic information of the surface of the earth including a surface portion on which a vehicle is capable of travelling, comprising:

  • maintaining a data structure of topographic information of coordinates of points on the surface of the earth;

    selecting from said data structure a portion of the topographic information for display dependent on a current position of the vehicle on said surface portion;

    determining a position of an apparent point of view and viewing direction for said display, said apparent point of view being outside of the vehicle and above the position of the vehicle;

    performing a coordinate transformation of said selected topographic information to represent said selected information as would be seen from said apparent point of view in said viewing direction, anddisplaying within said vehicle said selected transformed topographic information as a perspective image.

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