Road network traffic direction discrimination method and system based on road section included angle gradual change characteristics
A direction discrimination and road section technology, applied in the field of map information technology processing, can solve the problems of low discrimination accuracy and time-consuming, and achieve the effect of less time-consuming judgment.
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Embodiment 1
[0111] Such as figure 1 As shown, the road network traffic direction discrimination method based on the gradient characteristics of the road section angle includes the following steps:
[0112] S1: Obtain the data of the vector road network file;
[0113] S2: According to the obtained data, it traverses all road sections in turn, judges the traffic direction information of the road section, takes out all road sections with unknown traffic directions, and records them as unknown road sections, and records other road sections as known road sections;
[0114] S3: Take an unknown road, obtain its first road section and the last road section, and construct double buffer rectangles for the first road section and the last road section respectively;
[0115] S4: Judging the positional relationship between the known road section and the double buffer rectangle, and obtaining all road sections with known traffic directions that may intersect with the double buffer rectangle, which are ...
Embodiment 2
[0160] More specifically, on the basis of Embodiment 1, the solution will be described in combination with specific implementation examples, so as to further reflect the technical effects of the solution. Specifically:
[0161] In the data of the vector road network file in the step S1, a road is composed of a series of points, and a road may include multiple road sections, and the road sections may be separated from each other, and at the same time, the road sections may also intersect. The record content of the road section includes the coordinate range, the number of coordinate points, 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] It can be seen from the table that the data packet in the vector road network file includes the number (record number) of the road segment, the type of the road segment, and the coordinate information of the ...
Embodiment 3
[0215] More specifically, such as Figure 6 As shown, this scheme also proposes a road network traffic direction discrimination system based on road section angle gradient characteristics, which is used to realize a road network traffic direction discrimination method based on road section angle gradient features, including data acquisition module, road section traffic direction Judgment module, double buffer rectangle building module, alternative road section selection module, gradual 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 road section traffic direction judging module traverses all road sections in turn according to the acquired data, judges the traffic direction information of the road section, takes out all road sections with unknown traffic directions, and records them as unknown road sections, and ot...
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