Bus backbone line grabbing method
A technology for bus lines and routes, applied in traffic control systems, radio wave measurement systems, traffic control systems for road vehicles, etc., can solve the problems of fusion trajectory error, affecting calculation speed, Hausdorff distance time-consuming, etc., to improve process speed , the effect of improving accuracy, saving time
Active Publication Date: 2021-09-14
杭州数知梦科技有限公司
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Problems solved by technology
(2) Vehicle GPS segmentation is difficult
Due to certain errors in station reporting, it is impossible to segment clean uplink and downlink trajectories only by relying on station report
(3) Since there is no road network information, it is difficult to search for a trajectory that conforms to the road logic
However, due to the time-consuming calculation of Hausdorff distance, it will affect the calculation speed of this method.
At the same time, since the trajectory fusion depends on the GPS points on the reference trajectory, the GPS error on the reference trajectory will lead to the error of the final fusion trajectory
And most of the candidate centroids adjacent to the reference trajectory will not be on the road, which leads to the final result output relying on Gaode's road capture
Method used
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Embodiment 1
[0037] Such as figure 1 As shown, a bus backbone line grabbing method includes:
[0038] Step 1, obtain the bus line data that needs to be captured for backbone lines, and perform data preprocessing;
[0039] Step 2, generate effective candidate line trajectories from the data after preprocessing; candidate line trajectories such as figure 2 shown;
[0040] Step 3, generate a heat map with the candidate line track data in step 2, and generate a backbone line track according to the heat map;
[0041] Step 4: Merge the track of the backbone line to complete the capture.
[0042] Flatten backbone traces such as image 3 shown.
[0043] The first step includes the following sub-steps during data preprocessing:
[0044] Sub-step one by one, set time T, take T as the result data of the GPS track collection of a bus line with T as the time frame;
[0045] Substep one and two, obtain the existing station data of this bus line;
[0046] Substep one and three, the candidate tra...
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The invention aims to solve the existing problems that (1) the original GPS of a bus is abnormal, including abnormal speed of the bus, the GPS of the bus is not reported, and the GPS of the bus drifts to a fixed point according to a certain frequency due to the damage of a vehicle-mounted machine of the bus; (2) the gps segmentation of the vehicle is difficult, and because a certain error exists in station reporting, a clean uplink track and a clean downlink track cannot be segmented only depending on the station reporting; and (3) since no road network information exists, searching a track conforming to road logic is difficult. A bus backbone line grabbing method based on public source data is designed.
Description
technical field [0001] The invention relates to the field of bus line data processing and analysis, in particular to a method for grasping bus backbone lines. Background technique [0002] Bus backbone route capture is the key technology of intelligent and informatized public transportation system, which has been widely concerned by researchers at home and abroad. However, due to various objective reasons, it has not been possible to find a very effective method to obtain more accurate results. At present, the factors that affect the accuracy of the bus backbone lines are: (1) The original GPS of the bus is abnormal. Including the abnormal speed of the vehicle, the vehicle's GPS does not report, and the damage of the vehicle's on-board machine causes the vehicle's GPS to drift to a fixed point according to a certain frequency. (2) Vehicle GPS segmentation is difficult. Due to certain errors in station reporting, it is impossible to segment clean uplink and downlink traject...
Claims
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IPC IPC(8): G08G1/123G01S19/39G01S19/40G01S19/42
CPCG08G1/123G01S19/393G01S19/40G01S19/42
Inventor 郑凯杰
Owner 杭州数知梦科技有限公司