Urban intersection automatic identification method based on low precision space-time trajectory data
A spatio-temporal trajectory, automatic identification technology, applied in the direction of road vehicle traffic control system, traffic flow detection, traffic control system, etc., can solve the problems of long cycle, low sampling frequency and high data acquisition cost
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[0027] The invention designs a method for automatically identifying urban intersections based on low-precision spatio-temporal trajectory data, which reduces the cost of acquiring urban intersection structures, and the detection method is simple and easy to implement. The method provided by the present invention is as follows: firstly, use the density clustering method to eliminate the drift points in the original low-precision trajectory data, and then select the trajectory data whose sampling interval is less than 15s; secondly, track and identify the turning process of the trajectory, and extract a turning Turning point pairs whose heading angle change value exceeds the steering angle threshold and whose time interval is less than the time threshold in the process; then, use the distance and space-based growth clustering method to perform clustering calculations on all turning point pairs until each turning point pair Find its belonging category; further, calculate each turn...
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