Route guidance at intersections
First Claim
Patent Images
1. A method of providing route guidance along a planned route by means of a navigation system, the method comprising:
- upon determining that the planned route along a plurality of road segments of a road network graph comprises at least two adjacent intersections, retrieving from a database predetermined attributes for a transition between an incoming road segment of the plurality of road segments and leading towards a first one of the at least two adjacent intersections and an outgoing road segment of the plurality of road segments and leading away from a last one of the at least two adjacent intersections, wherein;
the predetermined attributes specify at least a curved path modelling a geometrical form of the transition,the curved path is defined from the incoming road segment leading toward the first one of the at least two adjacent intersections and the outgoing road segment leading away from the last one of the at least two adjacent intersections,the curved path is defined with respect to a first point on the incoming road segment, a second point on the outgoing road segment, and at least one further point in-between the incoming road segment and the outgoing road segment,the respective points are at given geolocations and have associated tangents to the curved path thereby defining a curvature of the curved path, andthe curved path is distinct from the plurality of road segments and at least partially deviates from the plurality of road segments; and
controlling a display to display the curved path in a map view for route guidance along the planned route.
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Abstract
Various embodiments relate to techniques of providing route guidance along a planned route leading through at least one intersection. Predetermined attributes for a respective transition through the at least one intersection are retrieved from a database, the attributes specifying at least a curved path modelling a geometrical form of the transition. The curved path is displayed in a map view for route guidance along a planned route.
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Citations
15 Claims
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1. A method of providing route guidance along a planned route by means of a navigation system, the method comprising:
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upon determining that the planned route along a plurality of road segments of a road network graph comprises at least two adjacent intersections, retrieving from a database predetermined attributes for a transition between an incoming road segment of the plurality of road segments and leading towards a first one of the at least two adjacent intersections and an outgoing road segment of the plurality of road segments and leading away from a last one of the at least two adjacent intersections, wherein; the predetermined attributes specify at least a curved path modelling a geometrical form of the transition, the curved path is defined from the incoming road segment leading toward the first one of the at least two adjacent intersections and the outgoing road segment leading away from the last one of the at least two adjacent intersections, the curved path is defined with respect to a first point on the incoming road segment, a second point on the outgoing road segment, and at least one further point in-between the incoming road segment and the outgoing road segment, the respective points are at given geolocations and have associated tangents to the curved path thereby defining a curvature of the curved path, and the curved path is distinct from the plurality of road segments and at least partially deviates from the plurality of road segments; and controlling a display to display the curved path in a map view for route guidance along the planned route. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A navigation system for providing route guidance along a planned route, the navigation system comprising:
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a database configured for storing map data comprising road segments of a road network graph and further configured for storing predetermined attributes for transitions of intersections of the road segments; at least one processor which is configured for, upon determining that the planned route along a plurality of road segments of the road network graph comprises at least two adjacent intersections, retrieving from the database predetermined attributes for a transition between an incoming road segment of the plurality of road segments and leading toward a first one of the at least two adjacent intersections and an outgoing road segment of the plurality of road segments and leading away from a last one of the at least two adjacent intersections, wherein; the predetermined attributes specify at least a curved path modelling a geometrical form of the transition, the curved path is defined from the incoming road segment leading toward the first one of the at least two adjacent intersections and the outgoing road segment leading away from the last one of the at least two adjacent intersections, the curved path is defined with respect to a first point on the incoming road segment, a second point on the outgoing road segment, and at least one further point in-between the incoming road segment and the outgoing road segment, the respective points are at given geolocations and have associated tangents to the curved path thereby defining a curvature of the curved path, and the curved path is distinct from the plurality of road segments and at least partially deviates from the plurality of road segments; and a display configured for selectively displaying the curved path in a map view for route guidance along the planned route.
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12. A navigation system for providing route guidance along a planned route, the navigation system comprising:
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a database configured to store map data comprising road segments of a road network and further configured to store predetermined attributes for transitions of intersections of the road segments; at least one processor configured to retrieve from the database predetermined attributes for a transition of at least two adjacent intersections along the planned route that includes a plurality of road segments of the road network graph, wherein; the predetermined attributes comprise at least one attribute for a transition between an incoming road segment of the plurality of road segments and leading toward a first one of the at least two adjacent intersections and an outgoing road segment of the plurality of road segments and leading away from a last one of the at least two adjacent intersections, the predetermined attributes specify at least a curved path modelling a geometrical form of the transition, the curved path is defined from the incoming road segment leading toward the first one of the at least two adjacent intersections and the outgoing road segment leading away from the last one of the at least two adjacent intersections, the curved path is defined by a first point on the incoming road segment, a second point on the outgoing road segment, and a third point arranged between the incoming road segment and the outgoing road segment, the respective points are at given geolocations and have associated tangents to the curved path thereby defining a curvature of the curved path, and the curved path is distinct from the plurality of road segments and at least partially deviates from the plurality of road segments; and a display configured to display the curved path for route guidance. - View Dependent Claims (13, 14, 15)
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Specification