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Method and device for matching track map of floating car

A technology of map matching and floating car, applied in the field of intelligent transportation system, which can solve the problems of large error and low accuracy.

Active Publication Date: 2015-07-29
沈阳世纪高通科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, due to the influence of the atmosphere, weather, satellite orbit error, satellite clock error, antenna phase, etc. during the process of track points being acquired by the GPS device, the coordinates of the track points acquired by the GPS have certain errors, so they will be different from each track point The road sequence composed of the roads with the closest distance between them is used as a floating car to match the actual track error on the map, and the accuracy is low

Method used

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  • Method and device for matching track map of floating car
  • Method and device for matching track map of floating car
  • Method and device for matching track map of floating car

Examples

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Embodiment 1

[0028] An embodiment of the present invention provides a method for matching a track map of a floating car, such as figure 1 As shown, the method includes:

[0029] 101. Acquire at least one road corresponding to each track point in the track point sequence.

[0030] Wherein, the distance between the track point and at least one corresponding road is less than or equal to a preset threshold, and the preset threshold can be set according to actual conditions. For example, if the preset threshold is configured as 200 meters, at this time, the distance between the road corresponding to the track point and the track point is less than or equal to 200 meters, and for the road with a distance greater than 200 meters from the track point, no As the road corresponding to the trajectory point, the matching accuracy can be improved.

[0031] 102. Calculate the road matching probabilities between the track point and each road according to the distance between the track point and each r...

Embodiment 2

[0046] An embodiment of the present invention provides a method for matching a track map of a floating car, such as image 3 As shown, the method includes:

[0047] 301. Acquire at least one road corresponding to each track point in the track point sequence.

[0048] Wherein, the distance between the track point and at least one corresponding road is less than or equal to a preset threshold, and the preset threshold can be set according to actual conditions. For example, if the preset threshold is configured as 100 meters, at this time, the distance between the road corresponding to the track point and the track point is less than or equal to 100 meters, and for the road with a distance greater than 100 meters from the track point, no As the road corresponding to the trajectory point, the matching accuracy can be improved.

[0049] 302. Calculate the road matching probabilities between the track point and the roads according to the distances between the track point and each ...

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Abstract

The embodiment of the invention discloses a floating car track map matching method and a floating car track map matching device, and relates to the field of an intelligent traffic system. The matching error of the floating car track on a map can be reduced, and the matching accuracy can be improved. The method comprises the following steps that firstly, at least one road respectively corresponding to each track point in a track point sequence is obtained, then, the road matching probability between the track points and each road is calculated according to the distance from the track point to each road in the at least one road, next, the road transfer probability from each road corresponding to the track point to each road corresponding to a next track point is calculated, in addition, a plurality of floating car tracks corresponding to the track point sequence are traversed according to the at least one road respectively corresponding to each track point, and finally, the route tracks of a floating car matched on the map are obtained from the floating car tracks according to the road matching probability and the road transfer probability.

Description

technical field [0001] The invention relates to the field of intelligent transportation systems, in particular to a method and device for matching track maps of floating vehicles. Background technique [0002] Floating car technology is one of the key technologies used in the field of intelligent transportation to obtain real-time road condition information in recent years. The basic principle is to match the trajectory of the floating car on the map according to the vehicle position, direction and speed information regularly recorded during the driving process of the floating car equipped with GPS (Global Positioning System, Global Positioning System). [0003] At present, when matching the track of a floating car on a map, the track points on the track of the floating car are usually obtained first, and then the road sequence composed of the roads closest to each track point is used as a floating car to match on the map actual trajectory. [0004] However, since the trac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/30G01S19/39G08G1/00
CPCG01S19/50
Inventor 陈金星
Owner 沈阳世纪高通科技有限公司