CN104063830B - A kind of exchange method of transport information - Google Patents
A kind of exchange method of transport information Download PDFInfo
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- CN104063830B CN104063830B CN201310093842.1A CN201310093842A CN104063830B CN 104063830 B CN104063830 B CN 104063830B CN 201310093842 A CN201310093842 A CN 201310093842A CN 104063830 B CN104063830 B CN 104063830B
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Abstract
The invention discloses a kind of exchange method of transport information, belong to intelligent transportation field, the method includes：Intercity treatment road network and city treatment road network are pre-processed and be superimposed, the total road network after integrating is formed；Urban traffic information and Intercity Transportation information are extracted, the exchange of urban traffic information and Intercity Transportation information is carried out in total road network.The present invention is by Intercity Transportation information supplement to urban traffic information, while during urban traffic information also added into Intercity Transportation information, increased the coverage rate of urban traffic information and Intercity Transportation information；Meanwhile, there is the interaction between urban traffic information and Intercity Transportation information, by increasing capacitance it is possible to increase the accuracy rate of city and inter-city road network overlay region.
Description
Technical field
The present invention relates to intelligent transportation field, more particularly to a kind of exchange method of transport information.
Background technology
In intelligent transportation field, real-time dynamic information service can provide efficient for Public Traveling, communications and transportation etc.
Feasible traffic guidance and trip planning information, so as to reach the purposes such as time-consuming, reduces cost and low-carbon environment-friendly.At present,
Traffic-information service can provide the foundation of traffic control and management for traffic control department in city, be that roading department makes rational planning for
Road equipment provides reference frame, reaches alleviation traffic congestion, the purpose of energy-saving and emission-reduction, and has increasingly goed deep into and affected people
Trip life.
Floating Car (Floating Car Data) technology is the technology hand of acquisition Traffic Information in intelligent transportation system
One of section.It utilizes location technology, wireless communication technology and the information processing technology, realizes GPS to driving vehicle on road
The collection of the traffic parameters such as confidence breath, instantaneous travel speed and direction, with reference to road network data, the traffic parameter to gathering enters
Row map match, path culculating and traffic information fusion etc. is calculated, and forms the transport information of reflection Real-time Road jam situation, is
Vehicle supervision department and the public provide dynamic traffic control and induced service.
At present, based on Floating Car city Real-time Traffic Information and the intercity Real-time Traffic Informations based on the danger of two visitor one are
Crowd is served, and is that traffic control department and the public provide Real-time Traffic Information.Because Floating Car has limited amount and travels random
Rule property so that within the same cycle, many roads do not have Floating Car to cover, and can not calculate the congestion information of road, so that
Reduce the integrality and availability of transport information.Therefore, city Real-time Traffic Information and intercity Real-time Traffic Information have friendship
The incomplete problem of communication breath.If urban traffic information and Intercity Transportation information can be complementary to one another, the traffic of road
Information coverage will certainly increase.But because the ride characteristic of taxi and the danger car of two visitor one is inconsistent, and each Self Matching
Road network is inconsistent so that urban traffic information and Intercity Transportation information are difficult to be merged.
To the mode that the transport information based on different road networks is swapped carried out by the way of matching list at present, i.e., it is right
The section of different maps carries out location matches, obtains the position relationship of different map Roads section, so as to realize between different road networks
Conversion.The mutual conversion between different editions or the map of different vendor, complex operation, it is easy to go out are realized based on matching list
Mistake, and produce and safeguard that the workload of matching list is big.
The content of the invention
In view of this, it is an object of the invention to provide a kind of exchange method of transport information, for improving Intercity Transportation
The efficiency that information and urban traffic information are exchanged.
The invention provides a kind of exchange method of transport information, including：
Intercity treatment road network and city treatment road network are pre-processed and be superimposed, is formed and is integrated Hou Zong roads
Net；Urban traffic information and Intercity Transportation information are extracted, urban traffic information and city are carried out in the total road network after the integration
The exchange of border transport information.
The present invention proposes that a kind of new method is inconsistent to solve the problems, such as city road network and inter-city road network, and main thought is
Intercity treatment road network and city treatment road network are integrated, i.e., processing road network with city goes to replace the intercity road in the region
Net, obtains a comprising intercity and urban road total road network.Selected at phase Yingcheng City according to administrative division from total road network
Line of reasoning net, the connectedness from total road network according to category of roads and road network extracts corresponding road network as intercity treatment road network.
The method is by Intercity Transportation information supplement to urban traffic information, while urban traffic information also is added into Intercity Transportation letter
In breath, the coverage rate of urban traffic information and Intercity Transportation information is increased；Meanwhile, there are urban traffic information and Intercity Transportation to believe
Interaction between breath, by increasing capacitance it is possible to increase the accuracy rate of city and inter-city road network overlay region.
Brief description of the drawings
Fig. 1 is the storage organization schematic diagram of Intercity Transportation information in the embodiment of the present invention；
Fig. 2 be the embodiment of the present invention in generate the urban traffic information of fusion and the principle schematic of Intercity Transportation information；
Fig. 3 is the exchange method flow chart of transport information provided in an embodiment of the present invention；
Fig. 4 is the total road network schematic diagram after being integrated in the embodiment of the present invention；
Fig. 5 is the transport information exchange method flow chart by taking three cities as an example provided in an embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, further is made to the present invention below in conjunction with the accompanying drawings
Detailed description.
The embodiment of the present invention proposes a kind of new method come inconsistent, the party that solves the problems, such as city road network and inter-city road network
Method is integrated using map and no longer makes matching list, easy to use.The main thought of the method is by intercity treatment road network and city
City's treatment road network is integrated, i.e., processing road network with city goes to replace the inter-city road network in the region, obtains portion comprising intercity
With total road network of urban road.The treatment road network of phase Yingcheng City, the root from total road network are selected according to administrative division from total road network
Corresponding road network is extracted as intercity treatment road network according to the connectedness of category of roads and road network.
Because inter-city road network scope is than larger, multiple cities are generally comprised, to carry out Intercity Transportation information and urban transportation
The exchange of information, typically can simultaneously load the urban transportation letter in all cities that Intercity Transportation information and inter-city road network are covered
Breath, then carries out data exchange, but because amount of traffic information is big so that exchange and be difficult to carry out.The embodiment of the present invention is in order that city
The exchange of border transport information and urban traffic information can be carried out faster, and the storage organization to Intercity Transportation information has been done such as figure
1 definition.Wherein, Intercity Transportation structure information storage is main is made up of file header, city index, the part of transport information three.Text
The information such as part head record version number, region, generation time, index record each city in city stores the original position of transport information
And side-play amount, transport information records every transport information in section according to section.
As shown in Fig. 2 urban traffic information and Intercity Transportation information are by after transport information exchange, generating the city after fusion
City's transport information and Intercity Transportation information.Wherein transport information exchange is mainly pre-processed comprising road network, urban traffic information is extracted,
Intercity Transportation information extraction, transport information are exchanged and transport information generation.
Fig. 3 is the exchange method flow chart of transport information provided in an embodiment of the present invention, is comprised the following steps：
Step 301, carry out road network pretreatment.Intercity treatment road network and city treatment road network are carried out according to unified standard
Format, such as following table
Table 1
Why intercity treatment road network and city treatment road network are pre-processed, because intercity treatment road network and city
Treatment road network may be from different manufacturer or different map versions, so as to cause identical road in respective map
State inconsistent (physical location in road section ID or section).Therefore, in step below, the present embodiment uses map integration method pair
Road network is integrated, and the same link removed in intercity treatment road network and city treatment road network represents inconsistent in respective map
Problem.Doing before map is integrated, it is necessary to the form of specification difference map datum, therefore defines table 1.
Step 302, city is processed road network and intercity treatment road network it is superimposed, forms the total road network after integrating.It is whole
Total road network after conjunction is made up of the inter-city road network of grey and the city road network of black, as shown in Figure 4.
In total road network after integration, the road network filtered out according to administrative division (CITYCODE) is used as line of reasoning at city
Net, the road network that the connectedness according to category of roads (NR) and road is filtered out marks INTERCITY as intercity treatment road network
=1.Because intercity treatment road network is sparse compared with city treatment road network, therefore the transport information of not every city treatment road network is all needed
Exchange on intercity treatment road network.Therefore, INTERCITY is labeled as 1 primarily to when being exchanged followed by transport information, city
The transport information of which road in city's treatment road network will be swapped and set as the transport information in intercity treatment road network
, non-intercity treatment road network field mark is 0.
Step 303, extraction urban traffic information and Intercity Transportation information.Because real-time urban traffic information generates the cycle
Generally 5 minutes, and the real-time Intercity Transportation information generation cycle is generally 15 minutes.Now define Floating Car sampling period T=5
Minute, then be divided within 24 hours one day 288 cycles, i.e. k=1,2 ..., 288 (k is the sampling being divided for 24 hours in a day
Cycle), wherein k=1 represents 00:00~00:05；K=288 represents 23:55~00:00.Gucheng city is in tcs=kT (k=1,
2 ..., 288) moment generation transport information, intercity in tcj=k ' T (k '=nk, nk<=288) moment produce transport information.Its
In, t represents time period, tcsThe generation time period of urban traffic information, every 5 minutes one section；tcjIt is the generation of Intercity Transportation information
Time period, every 15 minutes one section.
Step 304, the exchange for carrying out urban traffic information and Intercity Transportation information.Transport information is main by road section ID, speed
Degree (LinkId, Speed) composition.Wherein, urban traffic information and Intercity Transportation information are just as, and traffic letter is referred to as here
Breath, mainly by road section ID, speed composition.
City is illustrated by taking the Intercity Transportation information of Beijing-tianjin-hebei Region and Beijing, Tianjin, the urban traffic information in Baoding as an example
Exchange flow such as Fig. 5 of the exchange method of city's transport information and Intercity Transportation information, urban traffic information and Intercity Transportation information
It is shown, comprise the following steps：
Step 3040, initialization road network information, initialize tCur=0.TCur represents current slot, if current slot
Transport information exchange is carried out, has avoided the need for swapping again.Such as：Step 3041 calculates current time period t New, only
Just swapped as tNew ≠ tCur in step 3042, tCur is modified in step 3049 again after having exchanged；When
When being again introduced into the same time period, avoid the need for carrying out transport information again have exchanged, because exchanged tNew=tCur,
Step 3041 is continued executing with, is swapped until next time period.
Initialization road network is exactly to load the region (such as:Jing-jin-ji region) total road network, section is have recorded here
CITYCODE and INTERCITY information, is easy to transport information below to exchange.
Step 3041, current slot tNew is calculated according to system time.Such as：System time is 00:00~00:05 it
Between, then tNew=1.
If step 3042, tNew ≠ tCur, step 3043 is performed；Otherwise perform step 3041.
Step 3043, urban traffic information (TrafficCity), such as Beijing C are extracted according to date D and time period t Newbj。
If step 3044, tNew%n=0, i.e. Intercity Transportation information are updated, then step 3045 is performed；Otherwise hold
Row step 3046.
Step 3045, Intercity Transportation information (TrafficInterCity), and root are extracted according to date D and time period t New
The Intercity Transportation information E in city is extracted according to the index of Intercity Transportation informationbj。
Step 3046, the Intercity Transportation information E of traversal Beijing areabj, comprising in urban traffic information CbjIn not
The transport information in the section of presence is added in urban traffic information, then the Traffic In Beijing information after exchanging and generating is：
Wherein, LinkId is exactly the unique mark of road network.
If step 3047, tNew%n=0, the generation Intercity Transportation information is represented, then perform step 3048, otherwise performed
Step 3049.
Step 3048, traversal Beijing Traffic information Cbj, in Intercity Transportation information EbjIn do not exist and
The section of INTERCITY=1 is added in Intercity Transportation information, is so as to obtain intercity exchange and the transport information after generating：
Wherein, LinkId is exactly the unique mark of road network.
Step 3049, tCur=tNew, go to step 3041.This step is to update current slot, represents this time
The transport information of section has been exchanged and finished, and mainly expresses the meaning that a circulation is performed.
The embodiment of the present invention proposes a kind of efficient city Intercity Transportation information switching method and system, and Intercity Transportation is believed
During breath adds to urban traffic information, while during urban traffic information also added into Intercity Transportation information, increased city friendship
The coverage rate of communication breath and Intercity Transportation information；Meanwhile, there is the interaction between urban traffic information and Intercity Transportation information,
The accuracy rate of city and inter-city road network overlay region can be increased.
In a word, presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the scope of the present invention.
Claims (6)
1. a kind of exchange method of transport information, it is characterised in that including：
Intercity treatment road network and city treatment road network are pre-processed and be superimposed, the total road network after integrating is formed；From
The treatment road network of phase Yingcheng City is selected in total road network after the integration according to administrative division, from the total road network after the integration
Connectedness according to category of roads and road network extracts corresponding road network as intercity treatment road network；Extract urban traffic information and
Intercity Transportation information, carries out the exchange of urban traffic information and Intercity Transportation information in the total road network after the integration.
2. the exchange method of transport information according to claim 1, it is characterised in that the method before being pre-processed also
Further include：The storage organization of Intercity Transportation information is set；The storage organization is indexed and transport information by file header, city
Three parts constitute, wherein, file header record version number, region, generation time, each city of city index record storage traffic letter
The original position and side-play amount of breath, transport information record every transport information in section according to section.
3. the exchange method of transport information according to claim 1 and 2, it is characterised in that have the step of the pretreatment
Body is：Intercity treatment road network and city treatment road network are formatted.
4. the exchange method of transport information according to claim 3, it is characterised in that the total road network after the integration is specific
Including：
The road network that will be filtered out according to administrative division processes road network as city, and marks INTERCITY=0；According to road etc.
The road network that the connectedness of level and road is filtered out marks INTERCITY=1 as intercity treatment road network.
5. the exchange method of transport information according to claim 4, it is characterised in that the extraction urban traffic information and
The step of Intercity Transportation information, specifically includes：
T=5 minutes Floating Car sampling period was set, is then divided within 24 hours one day 288 cycles, k=1,2 ..., 288, its
Middle k is one day sampling period being divided for 24 hours, and k=1 represents 00:00~00:05；K=288 represents 23:55~00:00；
Then city is in tcs=kT (k=1,2 ..., the 288) moment produces transport information, intercity in tcj=k ' T (k '=nk, nk<=
288) moment generation transport information, wherein, tcsIt is the generation time period of urban traffic information, tcjIt is the generation of Intercity Transportation information
Time period.
6. the exchange method of transport information according to claim 5, it is characterised in that it is described carry out urban traffic information and
The step of Intercity Transportation information is exchanged specifically includes：
A, initialization road network information, initialize tCur=0, and tCur represents current slot；
B, current slot tNew is calculated according to system time；
If c, tNew ≠ tCur, step d is performed；Otherwise perform step b；
D, urban traffic information C is extracted according to date D and time period t New1；
If e, tNew%n=0, represent that Intercity Transportation information is updated, then perform step f；Otherwise perform step g；
F, Intercity Transportation information is extracted according to date D and time period t New, and city is extracted according to the index of Intercity Transportation information
Intercity Transportation information E1；
G, the Intercity Transportation information E for traveling through the city1, comprising in urban traffic information C1In non-existent section
Transport information is added in urban traffic information, then the urban traffic information after exchanging and generating is：
Wherein, LinkId is the unique mark of road network；
If h, tNew%n=0, the generation Intercity Transportation information is represented, then perform step i, otherwise perform step j；
I, the traversal urban traffic information C1, will be in Intercity Transportation information E1In do not exist and INTERCITY=1 section mend
It is charged in Intercity Transportation information, the Intercity Transportation information so as to be exchanged and after generating is：
Wherein, LinkId is the unique mark of road network；
J, setting tCur=tNew, perform step b.
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Address after: 100193 No. 301, block B, building 27, phase 1, Zhongguancun Software Park, No. 8, northeast flourishing West Road, Beijing, Haidian District Patentee after: Beijing city Mdt InfoTech Ltd Address before: 100191 Beijing City, Haidian District Xueyuan Road No. 39 Building 9 layer solid Patentee before: Beijing PalmCity Technology Co., Ltd. |
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