Method for the perspective display of a part of a topographic map, and device suitable for performing such a method
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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Abstract
A method and device for the perspective display of a portion of topographic coordinate information of points on the surface of the earth proximate to the current position of a vehicle travelling thereon, utilizes a coordinate transformation to generate a perspective image from an apparent point of view above and behind the vehicle in a viewing direction, which, with the direction of travel of the vehicle, defines an imaginary plane which is perpendicular to the surface of the earth.
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Citations
20 Claims
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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:
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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, and displaying within said vehicle said selected transformed topographic information as a perspective image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A device for perspective topographic display of successive images in relation to the position of a vehicle a surface comprising:
- a memory for the storage of topographic coordinate information of the surface, means for the determination of the position of the vehicle on the surface, first selection means for selecting, on the basis of the position of the vehicle, topographic sub-information from the topographic information by performing at least a first selection operation, transformation means for performing a coordinate transformation on the selected sub-information, in a projection from an apparent point of view, outside of the vehicle and above the current position of the vehicle, and display means for the display within the vehicle of a perspective image produced by the transformation.
- View Dependent Claims (19, 20)
Specification