RESOLVING GPS AMBIGUITY IN ELECTRONIC MAPS
First Claim
1. A system for correlating a vehicle'"'"'s location with a displayed map feature, comprising:
- a data reception module configured to obtain a location fix for the vehicle;
a database subsystem operably connected to the data reception module configured to provide a subset of map features responsive to the location fix; and
an inference processor operably connected to the database subsystem and configured to obtain inference data pertinent to which of the subset of map features should be selected as the displayed map feature, and processing the subset of map features responsive to the location fix and the inference data to determine a correspondence between the vehicle'"'"'s location and the displayed map feature.
2 Assignments
0 Petitions
Accused Products
Abstract
An electronic map system obtains a vehicle'"'"'s GPS fix from a GPS receiver and compares the fix with nearby map features such as road segments. Due to GPS inaccuracies, several such map features may correspond to a GPS fix. To determine which map feature should be shown as the location of the vehicle on the electronic map, the system infers a best fit among the map features that are close to the GPS fix by considering both distance and inferred characteristics of each map feature, such as prior GPS fixes and typical vehicle direction and speed on such feature. Some of these characteristics may be retrieved from a database and may be based on historical observations while others may be obtained in real time, for instance from on-board vehicle sensors.
98 Citations
24 Claims
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1. A system for correlating a vehicle'"'"'s location with a displayed map feature, comprising:
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a data reception module configured to obtain a location fix for the vehicle; a database subsystem operably connected to the data reception module configured to provide a subset of map features responsive to the location fix; and an inference processor operably connected to the database subsystem and configured to obtain inference data pertinent to which of the subset of map features should be selected as the displayed map feature, and processing the subset of map features responsive to the location fix and the inference data to determine a correspondence between the vehicle'"'"'s location and the displayed map feature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of correlating a vehicle'"'"'s location with a displayed map feature, comprising:
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obtaining a location fix for the vehicle; obtaining a set of map features responsive to the location fix; obtaining inference data pertinent to which of the subset of map features should be selected as the displayed map feature; and selecting one of the subset of map features to be the displayed map feature based on the location fix and the inference data. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A non-transitory computer-readable storage medium storing executable computer program code for correlating a vehicle'"'"'s location with a displayed map feature, the computer program code comprising instructions for:
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obtaining a location fix for the vehicle; obtaining a set of map features responsive to the location fix; obtaining inference data pertinent to which of the subset of map features should be selected as the displayed map feature; and selecting one of the subset of map features to be the displayed map feature based on the location fix and the inference data. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification