CN102426778A - Road traffic condition representation system and representation method based on vehicle position - Google Patents

Abstract

A road traffic status representation system and representation method based on vehicle position, the representation system mainly consists of three parts: user terminal, transmission network and server, wherein: the user terminal is any one of navigation terminal, mobile phone and computer, and is mainly responsible for the collection of vehicle operation position information and the point diagram representation of road traffic status; the user terminal includes: user data memory, information receiving module, information sending module, navigation management system module, electronic map management module, GPS module, operation position collection module and point diagram data drawing module; the transmission network is any one of WiMax, WiFi and GPRS wireless transmission networks; the server of the traffic information service center generally includes: point diagram database, information receiving module, information sending module and point diagram data management module.

Description

A road traffic condition representation system and representation method based on vehicle position

technical field

The present invention relates to a road traffic status representation method and representation system based on vehicle position, which belongs to the collection and representation system and representation method of road traffic information.

Background technique

With the continuous development of urbanization, more and more people are moving from the countryside to the city, and the roads in the city are becoming more and more congested with the increase of the urban population. For example, Beijing has changed from the capital to the "first traffic", We have to implement the "restriction" of family cars; recently, Hangzhou City has also had to adopt the "restriction" of vehicles during morning and evening peak hours. Therefore, people always hope to be able to drive on urban roads that are not blocked, and once they are stuck in traffic on urban roads, people's mood will be spoiled, not only bad, but also affect a day's work, study and life. Along with the use of driving navigator, a lot of convenience is provided for vehicle drivers, especially when drivers from other places arrive in a new city, they can easily find the destination by using driving navigator, but the existing navigator It is only a kind of navigation function, but there is no way for road jams. Once road jams occur, the driver can only wait patiently for the passage of the road. A road traffic condition indicator that collects and distributes information on urban road congestion.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a road traffic condition representation system and representation method based on the vehicle position, which utilizes the point map information of the road traffic condition, and the user can And the traffic flow density and the relationship between them, to judge whether the traffic is congested manually or automatically.

The object of the present invention is accomplished through the following technical solutions. The vehicle location-based road traffic condition representation system of the present invention mainly consists of three parts: user terminal, transmission network and server, wherein:

The user terminal is any terminal of a navigation terminal, a mobile phone, or a computer, and is mainly responsible for the collection of vehicle running position information and the point map representation of road traffic conditions; the user terminal includes: user data memory, information receiving module, information Sending module, navigation management system module, electronic map management module, GPS module, running position collection module and point map data drawing module;

Described transmission network is any in WiMax, WiFi, GPRS wireless transmission network;

The server of the traffic information service center generally includes: a point map database, an information receiving module, an information sending module and a point map data management module.

In the user terminal of the present invention, the user data memory is used to store map data, navigation path information, and point map data of the user terminal, and provide memory resource space necessary for software operation;

The information receiving module is responsible for listening to the port, and receives the data packet of the point map data from the server;

The information sending module can allocate port resources for the user connection, detect the SOCKET connection status on the port, close the dead connection, and send the data packet of the running position information collected by the user terminal to the server;

The main function of the GPS module is to read the GPS data, and analyze the validity of the data, then extract the latitude and longitude, speed information, satellite information, etc. of the vehicle, and provide an interface for obtaining the final GPS position information;

The running position information collection module is responsible for the management and maintenance of the information collection strategy, and obtains the running position information from the GPS module according to the set traffic condition collection time interval;

The electronic map management module is the basis of the GIS engine. It is mainly responsible for the management of map data, map drawing and display, and provides point, line and surface information during map drawing and display, corresponding to the facilities in the map data (including hotels, shopping malls, etc.) elements), roads (all roads in the city), and areas (including mountains, lakes, etc.); in addition, provide road traffic information during navigation, including road segment information, steering information, and intersection information;

The navigation management system module can plan the navigation route according to the electronic map data, as well as information such as the starting point, end point, and passing point set by the user, and is responsible for the dynamic change of the route during the navigation process, map zooming and other operations, and is also responsible for coordinating the management of the electronic map Module interaction with the dot plot data plotting module.

In the traffic information service center of the present invention, the point map database is used to store the running position information uploaded by the user terminal of each vehicle, and aggregate them into point map data;

The information receiving module is responsible for listening to the port, and receiving the data packet of the running location information from the user terminal;

The information sending module allocates port resources for the user connection, detects the SOCKET connection state on the port, closes the dead connection, and sends a data packet of point map data to the user terminal;

The point map data management module completes the analysis and summary of the data packets of the running position information uploaded by the user terminals of each vehicle, and forms the data packets of point map data information.

The described method for expressing road traffic conditions based on the vehicle position comprises the following steps:

Step 1, using the user terminal set on the vehicle running on the road, through the running position information collection module and the GPS module to obtain the running position information of the global satellite navigation system of the vehicle on the road in real time, the running position of the vehicle on the road The information includes longitude information and latitude information where the vehicle is located, as well as speed information;

Step 2, the information sending module of the user terminal of each vehicle encapsulates the collected real-time operating position information at the set traffic condition update time interval to form a data packet of operating position information, and transmits the data packet to the traffic through the transmission network. The server of the information service center;

Step 3, the information receiving module of the server of the traffic information service center sends the data packets of the real-time running position information of each vehicle received on the road to the point map data management module of the server of the traffic information service center; The point map data management module of the server analyzes according to the message definition of the data packet to obtain the running position information of the vehicle, and then summarizes it to form real-time road traffic condition point map data, and transmits the information through the information sending module of the server of the traffic information service center The data packet of the real-time road traffic condition point map data is transmitted to the user terminal through the network;

Step 4, the information receiving module of the user terminal sends the received road traffic status point map data to the point map data drawing module; the point map data drawing module is based on the current route planning information of the navigation management system module, and the surrounding areas of the electronic map management module Road map data, extract the point map data information that needs to be drawn, and express it on the electronic map of the user terminal in the form of a point map; when using a point map to represent road traffic conditions, use at least one point to represent the position of a vehicle, or use A symbol similar to a vehicle indicates the location of a vehicle, which is described on the electronic map of the user terminal.

The acquisition process of the running position information of the present invention is:

First, the running location information acquisition module calls the GPS module and initializes the GPS module; when initializing, the GPS module generates an instance object of CAppSystem_GPS, initializes and reads the GPS serial port by calling the member function Init(), and starts a new process loop Read and analyze GPS data information;

Then, read the GPS information from the file or the serial port, analyze it, store it in the static structure variable, and send the window information including the validity of the current GPS information and the number of satellites received to the registered window, and loop Operate as above until there is an error (not including the reason for timeout) or other reasons to exit the loop.

The traffic condition update time interval of the present invention is updated every 5 seconds by default, and may also be updated according to the time interval set by the running location information collection module of the user terminal.

The process of the information sending module of the user terminal according to the present invention to send the operating position information through the wireless transmission network is as follows: the information sending module of the user terminal performs port allocation, performs data encapsulation according to the message format of the operating position information data packet, and starts the user The information sending process of the terminal performs data packet sending. When sending data packets, the default number of sending worker threads is 2, and timeout detection is performed. Generally, the timeout is longer than 100 seconds.

The point map data management module of the server of the traffic information service center according to the present invention summarizes the running position information of each vehicle in the corresponding time period of each vehicle on the road according to the update time interval parameter of the set point map data to form a real-time Data package of road traffic condition point map data;

The point map data management module updates the real-time road traffic condition point map data every time it receives a vehicle's running position data packet; the road traffic condition point map is divided into sub-grid point maps according to the grid; the point map data sent to the user terminal is Divide into blocks according to the grid. When the position of the running vehicle changes, the point map needs to be updated, and the pointer address of the point in the user point map is queried according to the user number, and the cloud map point is directly updated.

The concrete method of step 4 is: at first, the information sending module of the server of the traffic information service center transmits the real-time road traffic condition point map data to the information receiving module of the user terminal through the network; secondly, the information receiving module of the user terminal according to received The longitude and latitude information of the global satellite navigation system of the current operating position of each vehicle in the real-time road traffic situation point map data is positioned to the corresponding position on the road map; finally, the user terminal uses at least one point or other symbols similar to the vehicle on the above-mentioned The position corresponding to the electronic map is marked as a running vehicle point, indicating that there is a vehicle running at this position.

The present invention uses the point map information of road traffic conditions, and the user can manually or automatically judge whether the traffic is congested according to the traffic flow, traffic flow speed, traffic flow density and the correlation between them; it has the advantages of convenient and reliable system composition, practical It can quickly acquire and respond to road traffic conditions, better allocate traffic and road resources, save social costs, reduce social consumption, and meet people's needs for the development of urbanization.

Description of drawings

Fig. 1 is a schematic diagram of the system structure of the present invention.

Fig. 2 is a schematic block diagram of the vehicle running position information acquisition process of the present invention.

Fig. 3 is a schematic block diagram of the running threads of the point map data management module of the present invention.

Detailed ways

The present invention will be described in detail below in conjunction with accompanying drawing and embodiment: As shown in Fig. 1, the road traffic condition representation system based on vehicle position of the present invention, it mainly consists of user terminal 1, transmission network 2 and server 3 three parts composition, wherein: the user terminal 1 is any terminal of a navigation terminal, a mobile phone, or a computer, and is mainly responsible for the collection of vehicle running position information and the point map representation of road traffic conditions; the user terminal includes: user data memory 8 , information receiving module 4, information sending module 7, navigation management system module 5, electronic map management module 6, GPS module 9, running position acquisition module 10 and point map data drawing module 11;

Described transmission network 2 is any in WiMax, WiFi, GPRS wireless transmission network;

The server 3 of the traffic information service center generally includes: a point map database 12 , an information receiving module 13 , an information sending module 15 and a point map data management module 14 .

In the user terminal of the present invention, the user data memory 8 is used to store map data, navigation path information, and point map data of the user terminal 1, and provide memory resource space necessary for software operation;

The information receiving module 4 is responsible for listening to the port, and receives the packet of the point map data from the server 3;

The information sending module 7 can allocate port resources for the user connection, detect the SOCKET connection state on the port, close the dead connection, and send the data packet of the running position information collected by the user terminal to the server 3;

The main function of the GPS module 9 is to read the GPS data, and analyze the validity of the data, then extract the latitude and longitude, speed information, satellite information, etc. of the vehicle, and provide an interface for obtaining the final GPS position information;

The running position information collection module 10 is responsible for the management and maintenance of the information collection strategy, and obtains the running position information from the GPS module 9 according to the traffic condition collection time interval set;

The electronic map management module 6 is the basis of the GIS engine. It is mainly responsible for the management of map data, map drawing and display, and provides point, line and plane information during map drawing and display, respectively corresponding to the facilities in the map data (including hotels, shopping malls, etc.) public elements), roads (all roads in the city), and areas (including mountains, lakes, etc.); in addition, provide road traffic information during navigation, including road section information, steering information, and intersection information;

The navigation management system module 5 can plan the navigation route according to the electronic map data and information such as the starting point, the end point, and the passing point set by the user, and is responsible for the dynamic change of the route during the navigation process, map zooming and other operations, and is also responsible for coordinating the electronic map The interaction between the management module 6 and the point map data drawing module 11 .

In the server 3 of the traffic information service center of the present invention, the point map database 12 is used to store the running position information uploaded by the user terminals of each vehicle, and form point map data after summarizing;

The information receiving module 13 is responsible for listening to the port, and receiving the data packet of the running location information from the user terminal;

The information sending module 15 allocates port resources for the user connection, detects the SOCKET connection state on the port, closes the dead connection, and sends the data packet of the point map data to the user terminal 1 through the wireless transmission network 2;

The point map data management module 14 completes the analysis and summary of the data packets of the running position information uploaded by the user terminal 1 of each vehicle, and forms a data packet of point map data information.

The described method for expressing road traffic conditions based on the vehicle position comprises the following steps:

Step 1, utilize the user terminal 1 that is set on the vehicle running on the road, obtain the running position information of the global satellite navigation system of the vehicle on the road in real time through the running position information collection module 10 therein and the GPS module 9, the vehicle is on the road The operating location information of the vehicle includes the longitude information and latitude information of the vehicle, as well as the speed information;

Step 2, the information sending module 7 of the user terminal 1 of each vehicle encapsulates the collected real-time running position information at the set traffic condition update time interval to form a data packet of the running position information, and passes the data packet through the transmission network 2 transmitted to the server 3 of the traffic information service center;

Step 3, the information receiving module 13 of the server 3 of the traffic information service center sends the data packets of the real-time running position information of each vehicle received on the road to the point map data management module 14 of the server 3 of the traffic information service center; The point map data management module 14 of the server 3 of the traffic information service center analyzes according to the message definition of the data packet to obtain the running position information of the vehicle, then summarizes and forms real-time road traffic condition point map data, and passes through the traffic information service center. The information transmission module 15 of server 3 transmits the data packet of the real-time road traffic situation point map data to the user terminal through the transmission network 2;

Step 4, the information receiving module 4 of the user terminal 1 sends the received road traffic condition point map data to the point map data drawing module 11; the point map data drawing module 11 is based on the current path planning information of the navigation management system module 5, and electronic The map data of the surrounding roads of the map management module 6 extracts the point map data information that needs to be drawn, and expresses it on the electronic map of the user terminal with the point map mode; The position of the vehicle, or the position of a vehicle represented by a symbol similar to the vehicle, is described on the electronic map of the user terminal.

As shown in Figure 2, the acquisition process of the running location information of the present invention is: first, the running location information acquisition module 10 calls the GPS module, and carries out the initialization of the GPS module 9; during initialization, the GPS module 9 generates an instance object of CAppSystem_GPS , initialize and read the GPS serial port by calling the member function Init(), and start a new process loop to prepare to read GPS data information;

Then, read the GPS information from the file or the serial port, analyze it, store it in the static structure variable, and send the window information including the validity of the current GPS information and the number of satellites received to the registered window, and loop Operate as above until there is an error (not including the reason for timeout) or other reasons to exit the loop.

The traffic condition update time interval of the present invention is updated every 5 seconds by default, and may also be updated according to the time interval set by the running position information collection module 10 of the user terminal 1 .

The process of the information sending module 7 of the user terminal 1 according to the present invention sending the operating position information through the transmission network 2 is as follows: the information sending module 7 of the user terminal performs port allocation, and performs data encapsulation according to the message format of the operating position information data packet, And start the information sending process of the user terminal 1 to send data packets. When sending data packets, the default number of sending worker threads is 2, and timeout detection is performed. Generally, the timeout is longer than 100 seconds.

The point map data management module 14 of the server 3 of the traffic information service center according to the present invention summarizes the running position information of each vehicle in the corresponding time period of each vehicle on the road according to the update time interval parameter of the set point map data, and forms Real-time road traffic status point map data packets;

Point map data management module 14 whenever receives the running position data packet of a vehicle, updates real-time road traffic condition point map data; Road traffic state point map is divided into sub-grid point map by grid; The data is partitioned according to the grid. When the position of the running vehicle changes, the point map needs to be updated, and the pointer address of the point in the user point map is queried according to the user number, and the cloud map point is updated.

The running thread of point map data management module 14 is as shown in Figure 3, comprises: running position receiving thread 23, point map updating thread 24, point map sending thread 25 and main thread 28, and point map address look-up table 26 and point map data Table 27.

The main thread 28 is responsible for the scheduling and management of the running position receiving thread 23, the point map update thread 24, the point map sending thread 25, and the point map address lookup table 26 and the point map data table 27. The running position receiving thread 23 obtains the point map data information from the receiving bidirectional queue 21 of the information receiving module 13 of the server 3 of the traffic information service center, and inquires the pointer of the point map point of the user in the point map address lookup table 26 according to the user number address, and update the point map data table 27. The point map sending thread 25 is responsible for sending the latest point map data to the sending bidirectional queue 22 of the information sending module 15 of the server 3 of the traffic information service center, and the information sending module 15 of the server 3 sends it to the user terminal 1.

The specific method of step 4 is: first, the information sending module 15 of the server 3 of the traffic information service center transmits the real-time road traffic situation point map data to the information receiving module 4 of the user terminal through the transmission network 2; secondly, the information receiving module 4 of the user terminal 1 The information receiving module 4 locates to the corresponding position on the road map according to the longitude and latitude information of the global satellite navigation system of the current running position of each vehicle in the real-time road traffic situation point map data received; finally, the user terminal 1 uses at least one point or other symbols similar to the vehicle are marked as running vehicle points on the corresponding position of the above electronic map, indicating that there is a vehicle running at this position.

Figure 3 shows the schematic representation of traffic conditions in point-map mode. From the position and density information of the running vehicle points marked in the electronic map of the user terminal, the real-time traffic road condition information can be intuitively reflected. When representing running vehicles on the map, one or more symbols such as dots, rectangles, and car icons can be used to represent them.

In general, map data is divided into city data description files and city specific data files based on each city.

l Among them, the city data description file: the naming method is (10 digits) plus the suffix ".cmf", and the basic information of the city is recorded in the description file. Each city has an ID, such as Hangzhou is 1022, and its city data description file name is: 4000001022.Cmf

l The city-specific data files are divided into 7 corresponding files: the naming method is (10 digits, corresponding to the corresponding city) + (20 digits, corresponding to the corresponding data) + ".cmf". These 7 specific data files store different data information (including: points, lines, planes, roads, road sections, intersections and steering information)

For example, the specific data information of Hangzhou city is as follows:

file name name illustrate 400000102200411000000000000000 RoadElement road section 400000102202000300000000000000 RawArea area 400000102201417000000000000000 Aggregated Road the way 400000102202000100000000000000 RawPoint point 400000102202000200000000000000 RAWLINENo Wire 400000102200411051010000000000 Manoeuvre steering information 400000102200412000000000000000 Junction intersection

When carrying out point map drawing, the information receiving module 4 of user terminal 1 locates to the map data center point position according to the longitude and latitude information of the global satellite navigation system that receives the current running position of each vehicle in the real-time road traffic condition point map data Matching is performed, and on the basis of the electronic map management module 6, point map information is added. The electronic map management module 6 encapsulates the important data needed for display and drawing, such as DC, bitmap handle, current enlarged size, traffic flow point of the drawing graphic element, etc., adopting a layered method to organize data will have the same meaning, attribute Organize things into one layer, so that each layer focuses on a different focus, and it is also conducive to a more organized display by the rendering engine. Geographical information in electronic map drawing is extracted into different levels according to different attributes, which are divided into land use (green space, desert), altitude, streets, traffic flow points, etc.

In the map layering process, multiple layers can be defined, and related drawing attributes can be defined for each layer, such as the color of the filled area of this layer, road color, text font, visibility threshold, etc. Each attribute of each layer needs to be selected according to actual needs, so that the map drawn on the small embedded screen will not appear disorganized and lack the distinction between primary and secondary.

The user checks the traffic conditions displayed in the form of a dot map through any user terminal 1 such as a navigation terminal, a mobile phone, and a computer, so as to know the number of vehicles on the road, the density of the vehicles, and the driving speed of the vehicles, and judge the situation through independent judgment. Traffic conditions on the road to obtain a judgment on the traffic conditions.

When judging the road traffic conditions, the user can judge the road traffic congestion situation according to his own subjective wishes according to the travel area, travel time, and daily traffic conditions; Judgment results, or the judgment results of road traffic conditions obtained by a certain road congestion recognition algorithm.

Generally, traffic flow can be quantitatively described through traffic flow, traffic flow speed and traffic flow density. Traffic flow, also known as traffic volume, indicates the number of vehicles that pass through a designated section of the road within a unit of time, and the unit is vehicle/hour or vehicle/day; traffic flow velocity, referred to as flow velocity, indicates the speed of traffic flow, and the unit is meter per second or km/h; traffic flow density, indicating the density of traffic flow, that is, the number of vehicles contained in the unit length of the road, and the unit is vehicle/km. The relationship between the three parameters of traffic flow is: traffic flow is the product of traffic flow speed and traffic flow density. the

Using the point map information of road traffic conditions, the user can manually or automatically judge whether the traffic is congested according to the traffic flow, traffic flow speed, traffic flow density and the relationship between them.

Claims (9)

1. A road traffic condition representation system based on vehicle position, it is mainly made up of user terminal, transmission network and server three parts, is characterized in that wherein: The user terminal is any terminal of a navigation terminal, a mobile phone, or a computer, and is mainly responsible for the collection of vehicle running position information and the point map representation of road traffic conditions; the user terminal includes: user data memory, information receiving module, information Sending module, navigation management system module, electronic map management module, GPS module, running position collection module and point map data drawing module; Described transmission network is any in WiMax, WiFi, GPRS wireless transmission network; The server of the traffic information service center generally includes: a point map database, an information receiving module, an information sending module and a point map data management module. 2. The road traffic condition representation system based on vehicle position according to claim 1, characterized in that in the user terminal, the user data memory is used to store map data, navigation route information, and point map data of the user terminal , and provide the necessary memory resource space for software operation; The information receiving module is responsible for listening to the port, and receives the data packet of the point map data from the server; The information sending module can allocate port resources for the user connection, detect the SOCKET connection status on the port, close the dead connection, and send the data packet of the running position information collected by the user terminal to the server; The main function of the GPS module is to read the GPS data, and analyze the validity of the data, then extract the latitude and longitude, speed information, satellite information, etc. of the vehicle, and provide an interface for obtaining the final GPS position information; The running position information collection module is responsible for the management and maintenance of the information collection strategy, and obtains the running position information from the GPS module according to the set traffic condition collection time interval; The electronic map management module is the basis of the GIS engine. It is mainly responsible for the management of map data, map drawing and display, and provides point, line and surface information during map drawing and display, corresponding to the facilities in the map data (including hotels, shopping malls, etc.) elements), roads (all roads in the city), and areas (including mountains, lakes, etc.); in addition, provide road traffic information during navigation, including road segment information, steering information, and intersection information; The navigation management system module can plan the navigation route according to the electronic map data, as well as information such as the starting point, end point, and passing point set by the user, and is responsible for the dynamic change of the route during the navigation process, map zooming and other operations, and is also responsible for coordinating the management of the electronic map Module interaction with the dot plot data plotting module. 3. The road traffic condition representation system based on vehicle position according to claim 1, characterized in that the traffic information service center of the present invention, wherein the point map database is used to store the running position information uploaded by the user terminal of each vehicle , and aggregated into point map data; The information receiving module is responsible for listening to the port, and receiving the data packet of the running location information from the user terminal; The information sending module allocates port resources for the user connection, detects the SOCKET connection state on the port, closes the dead connection, and sends a data packet of point map data to the user terminal; The point map data management module completes the analysis and summary of the data packets of the running position information uploaded by the user terminals of each vehicle, and forms the data packets of point map data information. 4. A representation method utilizing the road traffic condition representation system based on vehicle position as claimed in claim 1 or 2 or 3, is characterized in that it comprises the steps: Step 1, using the user terminal set on the vehicle running on the road, through the running position information collection module and the GPS module to obtain the running position information of the global satellite navigation system of the vehicle on the road in real time, the running position of the vehicle on the road The information includes longitude information and latitude information where the vehicle is located, as well as speed information; Step 2, the information sending module of the user terminal of each vehicle encapsulates the collected real-time operating position information at the set traffic condition update time interval to form a data packet of operating position information, and transmits the data packet to the traffic through the transmission network. The server of the information service center; Step 3, the information receiving module of the server of the traffic information service center sends the data packets of the real-time running position information of each vehicle received on the road to the point map data management module of the server of the traffic information service center; The point map data management module of the server analyzes according to the message definition of the data packet to obtain the running position information of the vehicle, and then summarizes it to form real-time road traffic condition point map data, and transmits the information through the information sending module of the server of the traffic information service center The data packet of the real-time road traffic condition point map data is transmitted to the user terminal through the network; Step 4, the information receiving module of the user terminal sends the received road traffic status point map data to the point map data drawing module; the point map data drawing module is based on the current route planning information of the navigation management system module, and the surrounding areas of the electronic map management module Road map data, extract the point map data information that needs to be drawn, and express it on the electronic map of the user terminal in the form of a point map; when using a point map to represent road traffic conditions, use at least one point to represent the position of a vehicle, or use A symbol similar to a vehicle indicates the location of a vehicle, which is described on the electronic map of the user terminal. 5. The road traffic condition representation method based on vehicle position according to claim 4, characterized in that the acquisition process of the running position information is: First, the running location information acquisition module calls the GPS module and initializes the GPS module; when initializing, the GPS module generates an instance object of CAppSystem_GPS, initializes and reads the GPS serial port by calling the member function Init(), and starts a new process loop Read and analyze GPS data information; Then, read the GPS information from the file or the serial port, analyze it, store it in the static structure variable, and send the window information including the validity of the current GPS information and the number of satellites received to the registered window, and loop Operate as above until there is an error (not including the reason for timeout) or other reasons to exit the loop. 6. The road traffic condition representation method based on vehicle position according to claim 4, characterized in that the update time interval of the traffic condition is updated every 5 seconds by default, and can also be updated according to the operating position information collection module of the user terminal Updates are performed at set intervals. 7. The road traffic condition representation method based on vehicle position according to claim 4, characterized in that the information sending module of the user terminal sends the process of running position information through the wireless transmission network as follows: the information sending module of the user terminal carries out Port allocation, data encapsulation according to the message format of the running location information packet, and start the information sending process of the user terminal to send the data packet; when sending the data packet, the default number of sending worker threads is 2, and timeout detection is performed, Generally, the sending timeout is when the time exceeds 100 seconds. 8. The road traffic condition representation method based on vehicle position according to claim 4, characterized in that the point map data management module of the server of the traffic information service center summarizes each The running position information of each vehicle in the corresponding time period of the vehicle on the road forms a data packet of real-time road traffic condition point map data; The point map data management module updates the real-time road traffic condition point map data every time it receives a vehicle's running position data packet; the road traffic condition point map is divided into sub-grid point maps according to the grid; the point map data sent to the user terminal is Divide into blocks according to the grid; when the position of the running vehicle changes, the point map needs to be updated, and the pointer address of the point in the user point map is queried according to the user number, and the cloud map point is directly updated. 9. The road traffic condition representation system based on vehicle position according to claim 4, characterized in that the concrete method of step 4 is: first, the information sending module of the server of the traffic information service center sends the real-time road traffic condition point map data The information receiving module transmitted to the user terminal through the network; secondly, the information receiving module of the user terminal locates the road according to the longitude and latitude information of the global satellite navigation system of the current operating position of each vehicle in the real-time road traffic condition point map data received The corresponding position on the map; finally, the user terminal uses at least one point or other symbols similar to the vehicle to mark the position corresponding to the above-mentioned electronic map as a running vehicle point, indicating that there is a vehicle running at this position.

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