Map matching method and system

A technology of map matching and matching probability, applied in the field of navigation, can solve problems such as low accuracy and navigation errors, and achieve the effect of improving the accuracy rate

Active Publication Date: 2017-06-16
BEIJING JINGDONG QIANSHITECHNOLOGY CO LTD
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  • Abstract
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Problems solved by technology

However, the accuracy of map matching results in the prior art is not high, and navigation errors are prone to occur

Method used

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  • Map matching method and system
  • Map matching method and system

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Embodiment Construction

[0031] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless specifically stated otherwise, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0032] At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships.

[0033] The following description of at least one exemplary embodiment is actually only illustrative, and in no way serves as any limitation to the present invention and its application or use.

[0034] The technologies, methods, and equipment known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be regarded as part o...

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Abstract

The invention discloses a map matching method and a map matching system, and relates to the field of navigation. The method comprises the following steps: determining a candidate point according to a tracing point of a driving vehicle, wherein the candidate point is a projection point of the tracing point on a road within a preset range; determining the direction of the road of the position of the candidate point; calculating the direction probability of the candidate point according to the direction of the road of the position of the candidate point; calculating the comprehensive matching probability of the candidate point according to the direction probability of the candidate point, the measuring probability of the candidate point and the transfer probability of the candidate point; and comparing the comprehensive matching probabilities of all the candidate points and determining the trace position point of the vehicle on the actual road. According to the method for performing map matching through the driving direction of the vehicle, the attribute of the existing road network data can be not changed, and the direction of the road position of the candidate point is acquired under the condition of not performing road network data preparation in advance, so that the direction probability is calculated and the accurate rate of map matching is increased.

Description

Technical field [0001] The invention relates to the field of navigation, in particular to a map matching method and system. Background technique [0002] Affected by the accuracy of the car navigation system and the surrounding environment, the positioning results directly obtained through GNSS (Global Navigation Satellite System) are often not on the actual road on which the vehicle is driving, and need to rely on map matching technology in real time or through post-processing The method calculates the acquired track points to the actual road for real-time navigation and historical track playback. [0003] The existing map matching technology mostly uses incremental probability calculation or global probability calculation to process historical trajectories. Among them, the incremental probability map matching technology mostly uses the calculation of the relationship between all the candidate points of the newly acquired GNSS track point and the previous matching result to selec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/30
CPCG01C21/30
Inventor 韩璐懿
Owner BEIJING JINGDONG QIANSHITECHNOLOGY CO LTD
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