Map display system
First Claim
Patent Images
1. A map display system for displaying a map in accordance with map data stored, comprising:
- memory means for storing coordinate components in a predetermined coordinate system of at least two specified points as map data, a first of said at least two specified points representing a beginning point and a second of said points representing an ending point of a predetermined section of a road on the map to be displayed, and for storing coordinate components of each of a plurality of crossing points on said predetermined section of the road, at each of which crossing points said predetermined section of the road crosses one of a plurality of parallel lines that are parallel with a straight line connecting said at least two specified points and which are spaced at equal distances from said straight line and from one another;
display control means for converting said coordinate components of said at least two specified points and of said plurality of crossing points stored in said memory means into display coordinates and for generating a display signal for displaying a connecting line connecting said points stored in said memory on said predetermined section; and
display means for displaying said map by displaying said connecting line of the points on said predetermined section of the road in accordance with the display signal from said display control means.
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Abstract
A map display system for displaying a linear object on a map in accordance with stored map data is disclosed. The coordinate components of at least two specified points on the linear object and other points thereon crossing straight lines drawn in spaced relationship and in parallel with the straight line connecting the specified points are stored as map data in a memory. The coordinate components thus stored are converted into a display coordinate by a display control to generate a display signal. In accordance with the display signal the linear object is displayed on a display within a predetermined display section.
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Citations
4 Claims
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1. A map display system for displaying a map in accordance with map data stored, comprising:
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memory means for storing coordinate components in a predetermined coordinate system of at least two specified points as map data, a first of said at least two specified points representing a beginning point and a second of said points representing an ending point of a predetermined section of a road on the map to be displayed, and for storing coordinate components of each of a plurality of crossing points on said predetermined section of the road, at each of which crossing points said predetermined section of the road crosses one of a plurality of parallel lines that are parallel with a straight line connecting said at least two specified points and which are spaced at equal distances from said straight line and from one another; display control means for converting said coordinate components of said at least two specified points and of said plurality of crossing points stored in said memory means into display coordinates and for generating a display signal for displaying a connecting line connecting said points stored in said memory on said predetermined section; and display means for displaying said map by displaying said connecting line of the points on said predetermined section of the road in accordance with the display signal from said display control means. - View Dependent Claims (2, 3)
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4. A system as in claim 7 wherein said instruction means further comprises:
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means for determining locations of said plurality of parallel lines, and means for determining all of said crossing points between said predetermined section and any of said plurality of parallel lines and for storing said crossing points in said memory means.
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Specification