DETERMINING A DISPLAY POSITION OF ROAD NAME DATA AND DISPLAYING THE ROAD NAME DATA
First Claim
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1. A method of determining a display position for road name data, comprising:
- selecting a link representing a road segment with an initial road name display position from stored map data;
calculating an angle of the selected link;
based on the calculated angle of the link, determining a display reference position to display the road name; and
storing, relative to the link, updated road name display position information including the determined display reference position.
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Abstract
A method of determining a display position for road name data including selecting a link representing a road segment with an initial road name display position from stored map data. An angle of the selected link is calculated, and calculating an angle of the selected link, a display reference position is identified to display the road name. Updated road name display position information including the determined display reference position is stored relative to the link.
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Citations
27 Claims
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1. A method of determining a display position for road name data, comprising:
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selecting a link representing a road segment with an initial road name display position from stored map data;
calculating an angle of the selected link;
based on the calculated angle of the link, determining a display reference position to display the road name; and
storing, relative to the link, updated road name display position information including the determined display reference position. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for determining a display position for road name data in a navigation system, the method comprising:
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sequentially selecting links representing a road segment in a route to determine an initial road name display position from map data for the selected link;
acquiring information of a start node, a shape point and an end node for each of the selected links;
calculating a length of each of the selected links;
selecting a link as a reference link based on a comparison of the lengths of the links;
calculating an angle of the reference link;
determining a display reference position to display a road name according to the calculated angle of the selected link; and
storing road name display position information representing the display reference position. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method of displaying road name data in a navigation system, the method comprising:
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generating a map with road links using map data read from a map data storage unit;
acquiring road name display position information based upon an angle of each of the links from the map data; and
inserting road names in the map according to the acquired road name display position information. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification