Method and apparatus for displaying current vehicle position
First Claim
1. A method for displaying information corresponding to a current vehicle position on a display of a vehicle navigation system comprising the steps of:
- (A) determining a current road;
(B) referring to a map database to construct a separate current road database, the current road database being a subset of the map database and comprising first nodes and first segments corresponding to the current road and second segments emanating from selected ones of the first nodes;
(C) determining a current road segment corresponding to the current vehicle position;
(D) referring to the current road database to determine a first geographical location based on the current road segment; and
(E) displaying a text representation of the current vehicle position relative to the first geographical location.
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Abstract
Methods and apparatus are described for displaying information corresponding to a current vehicle position on a display of a vehicle navigation system. After the current vehicle position is determined by a separate process, the system determines the road on which the vehicle is currently located. The system then refers to a map database to construct a current road database corresponding to the current road. A current road segment corresponding to the current vehicle position is then determined. The system then refers to the current road database to determine a first geographical location based on the current vehicle road segment. The system then displays a text representation of the current vehicle position relative to the first geographical location.
177 Citations
19 Claims
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1. A method for displaying information corresponding to a current vehicle position on a display of a vehicle navigation system comprising the steps of:
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(A) determining a current road;
(B) referring to a map database to construct a separate current road database, the current road database being a subset of the map database and comprising first nodes and first segments corresponding to the current road and second segments emanating from selected ones of the first nodes;
(C) determining a current road segment corresponding to the current vehicle position;
(D) referring to the current road database to determine a first geographical location based on the current road segment; and
(E) displaying a text representation of the current vehicle position relative to the first geographical location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
determining whether the current road has changed; and
repeating steps (A)-(E) when the current road has changed.
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17. An apparatus for displaying information corresponding to a current vehicle position on a display of a vehicle navigation system comprising:
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(A) means for determining a current road;
(B) means for referring to a map database and constructing a separate current road database, the current road database being a subset of the map database and comprising first nodes and first segments corresponding to the current road and second segments emanating from selected ones of the first nodes;
(C) means for determining a current road segment corresponding to the current vehicle position;
(D) means for referring to the current road database and determining a first geographical location based on the current road segment; and
(E) means for displaying a text representation of the current vehicle position relative to the first geographical location.
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18. A vehicle navigation system, comprising:
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a plurality of sensors for detecting a current vehicle position and a vehicle heading, and generating signals indicative thereof;
a display for communicating the current vehicle position to a user;
a database medium having map data stored therein; and
a processor coupled to the sensors, the display, and the database medium, the processor being operable to (A) determine a current road;
(B) refer to the database medium and construct a separate current road database, the current road database being a subset of the map database and comprising first nodes and first segments corresponding to the current road and second segments emanating from selected ones of the first nodes;
(C) determine a current road segment corresponding to the current vehicle position;
(D) refer to the current road database and determine a first geographical location based on the current road segment; and
(E) display a text representation of the current vehicle position relative to the first geographical location.
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19. A computer program product for displaying information corresponding to a current vehicle position on a display of a vehicle navigation system, comprising:
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a computer-readable medium; and
a computer program mechanism embedded in the computer-readable medium for causing a computer to perform the steps of;
(A) determining a current road;
(B) referring to a map database to construct a separate current road database, the current road database being a subset of the map database and comprising first nodes and first segments corresponding to the current road and second segments emanating from selected ones of the first nodes;
(C) determining a current road segment corresponding to the current vehicle position;
(D) referring to the current road database to determine a first geographical location based on the current road segment; and
(E) displaying a text representation of the current vehicle position relative to the first geographical location.
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Specification