Method and system for determining traffic direction of road network based on gradient characteristics of road section included angle
A technology of direction discrimination and road sections, applied in the field of map information technology processing, can solve the problems of low discrimination accuracy and time-consuming, etc., and achieve the effect of less time-consuming judgment
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Embodiment 1
[0111] like figure 1 As shown in the figure, the road network traffic direction discrimination method based on the gradient feature of the included angle of the road segment includes the following steps:
[0112] S1: Get the data of the vector road network file;
[0113] S2: traverse all the road sections in turn according to the acquired data, determine the traffic direction information of the road section, take out all the road sections with unknown traffic directions, record them as unknown road sections, and record other road sections as known road sections;
[0114] S3: Take an unknown road, obtain its first road segment and end road segment, and construct a double buffer rectangle for the first road segment and the end road segment respectively;
[0115] S4: Determine the positional relationship between the known road section and the double buffer rectangle, and obtain all road sections with known traffic directions that may intersect with the double buffer rectangle, a...
Embodiment 2
[0160] More specifically, on the basis of Embodiment 1, the solution will be described in conjunction with specific implementation examples, which further reflects the technical effect of the solution. Specifically:
[0161] In the data of the vector road network file in the step S1, a road consists of a series of points, a road may include multiple road segments, and the road segments may be separated or intersected. The recorded content of the road segment includes the coordinate range, the number of coordinate points, and coordinate information (latitude and longitude), etc., as shown in Table 1 below.
[0162] Table 1 Vector road network data structure and meaning (part)
[0163]
[0164]
[0165] As can be seen from the table, the data packets in the vector road network file include the number (record number) of the road segment, the type of the road segment, and the coordinate information of the vertices composing the road segment. The record format of the vertic...
Embodiment 3
[0215] More specifically, as Image 6 As shown, this scheme also proposes a road network traffic direction discrimination system based on the gradient feature of the included angle of the road section, which is used to realize a road network traffic direction discrimination method based on the gradient feature of the included angle of the road segment, including a data acquisition module, a road segment traffic direction Judgment module, double-buffered rectangle building module, alternative road section selection module, progressive included angle judgment module, unknown road section direction determination module and output module; wherein:
[0216] The data acquisition module is used to acquire the data of the vector road network file;
[0217] The traffic direction judgment module of the road section traverses all the road sections in turn according to the acquired data, judges the traffic direction information of the road section, and takes out all the road sections with...
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