Method for rapidly mapping road position of vehicle
A technology for roads and vehicles, which is applied in the field of rapid mapping of the road position of the vehicle, which can solve the problems of heavy burden, accelerated retrieval speed, high system resource requirements, etc., and achieve the effect of rapid mapping and positioning
Active Publication Date: 2015-06-10
XIAMEN YAXON NETWORKS CO LTD
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Problems solved by technology
The disadvantage of this kind of static grid division is that the grid number index needs to be established in advance. In order to speed up the retrieval speed within a single grid range, the fixed size of the grid cannot be set too large. The total number often reaches millions or even tens of millions, which leads to a heavy additional burden of establishing related indexes and requires high system resources.
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[0020] The present invention will be further described below in conjunction with the embodiments with reference to the accompanying drawings.
[0021] see Figure 1 to Figure 3 As shown, a method for quickly mapping the road position of the vehicle includes the following steps:
[0022] Step 1. According to the administrative divisions of each city, form the first-level range rectangular filter box of each city; filter the road position where the vehicle is located through the first-level range rectangular filter box to obtain the city corresponding to the road position;
[0023] Said step 1 further includes: each city is respectively formed into a corresponding first-level range rectangular screening frame, and the longitude and latitude coordinates of the road position a point where the vehicle is located are: (a x ,a y );
[0024] Suppose a city is city A, then the latitude and longitude coordinates of the four corners of the rectangular screening frame of the first-leve...
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The invention provides a method for rapidly mapping the road position of a vehicle. The method includes the steps: 1 forming a primary range rectangular screening box of each city according to the administrative division range of each city, and screening the road position of the vehicle by the primary range rectangular screening box to obtain the city corresponding to the road position; 2 forming a road in the city by a plurality of limited line sections in a road database, forming a secondary range rectangular frame by the line sections, and enabling longitudes and latitudes of the road position of the vehicle to pass the secondary range rectangular frame to obtain the line sections corresponding to the road position; 3 acquiring the vertical projection distance between the road position of the vehicle and each line section, enabling the road position of the vehicle to correspond to the line sections according to the vertical projection distance and comparative analysis of a direction formed by two projection points at adjacent times of the vehicle and the trend of the road, and issuing road condition information of the road and peripheral roads to the vehicle by an intelligent traffic information service center. The position of the vehicle can be rapidly mapped and positioned when system resource requirements are low.
Description
technical field [0001] The invention relates to the technical field of road traffic, in particular to a method for quickly mapping the road position of a vehicle. Background technique [0002] When the intelligent traffic information service center sends real-time road condition information to the user, it first needs to determine the current road position of the vehicle, and then send the user the surrounding road condition information adjacent to this road. Due to the rapid change of vehicle position and the high frequency of changes in real-time road condition information (especially during traffic peak hours), real-time performance is an important performance indicator in order to achieve a good road condition information broadcasting effect. How to quickly and accurately calculate and judge the current road information of the vehicle from the massive road database and according to the longitude and latitude information uploaded by users is a key problem that the intelli...
Claims
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Login to View More IPC IPC(8): G08G1/127G01C21/30
CPCG01C21/30G08G1/127
Inventor 季刚黄家乾王国清林秋芳
Owner XIAMEN YAXON NETWORKS CO LTD