Methods and systems for deducing road geometry and connectivity
First Claim
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1. A method for generating an improved database representing a road network, comprising the steps of:
- defining a baseline road in the road network, the defining comprising replacing an original representation of the baseline road in the database with new data, the new data having a greater accuracy than the original representation;
collecting the new data from a vehicle traveling a route in the road network;
dividing the route into one or more route segments;
assigning each route segment as an on-baseline segment, an off-baseline segment, an off-baseline to on-baseline transition, an on-baseline to off-baseline transition, or a within-baseline transition;
processing the collected data for each route segment.
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Abstract
Methods and systems for generating, deriving, and enhancing drivable road databases are provided. A baseline road in a road network is defined and position and/or trajectory data collected by vehicles traveling the baseline road are compiled and compared to a representation of the baseline road in an existing database. Identity and/or other property information about the road are assigned form the existing database to the new database.
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Citations
9 Claims
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1. A method for generating an improved database representing a road network, comprising the steps of:
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defining a baseline road in the road network, the defining comprising replacing an original representation of the baseline road in the database with new data, the new data having a greater accuracy than the original representation;
collecting the new data from a vehicle traveling a route in the road network;
dividing the route into one or more route segments;
assigning each route segment as an on-baseline segment, an off-baseline segment, an off-baseline to on-baseline transition, an on-baseline to off-baseline transition, or a within-baseline transition;
processing the collected data for each route segment. - View Dependent Claims (2, 3)
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4. A method for generating an improved database representing a road network, comprising the steps of:
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recording a plurality of vehicle position data points from one or more vehicles traveling on a baseline road, such that all of the available directions of travel on the baseline road are traveled by at least one of the one or more vehicles;
compiling the vehicle position data;
connecting the recorded data points to form a semi-continuous trace of the geometric shape of the baseline road;
comparing the trace to a representation of the baseline road in an existing database that comprises road identities and/or properties; and
assigning one or more of the identities and/or properties from the existing database to the baseline road representation in the improved database. - View Dependent Claims (5, 6)
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7. A method for deducing road connectivity comprising the steps of:
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recording a plurality of vehicle position data points from a vehicle traveling a route, the route comprising a first road segment and a second road segment, the route further comprising a junction between the first road segment and the second road segment;
discretizing the vehicle position data points based on a measure of flow such that the data points are binned into categories;
aggregating the semi-continuous traces for the roads into a database that represents one or more road connections generally followed by vehicles traveling on the roads. - View Dependent Claims (8, 9)
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Specification