CN110910634B

CN110910634B - Traffic network information description method and device

Info

Publication number: CN110910634B
Application number: CN201811079787.XA
Authority: CN
Inventors: 赵丹
Original assignee: Alibaba Group Holding Ltd
Current assignee: Alibaba Group Holding Ltd
Priority date: 2018-09-14
Filing date: 2018-09-14
Publication date: 2022-09-06
Anticipated expiration: 2038-09-14
Also published as: CN110910634A

Abstract

The application discloses a method and a device for describing traffic network information. The description method of the traffic network information comprises the following steps: constructing a basic object set for describing the information of the traffic entities according to the data characteristics of the traffic entities contained in the scene of the traffic network; the set of base objects includes a plurality of base objects; according to traffic entities contained in a traffic network scene, constructing a derivative object set used for describing the traffic entity information in the traffic network scene by taking the constructed basic object as a basis; the set of derived objects includes a plurality of derived objects. By adopting the method provided by the application, more flexible description of the traffic network information is realized, and more requirements on the traffic network information in reality are met, so that a unified and flexible description mode is provided for various road network entities in a traffic network scene, and unified description of a complicated road network is realized.

Description

Traffic network information description method and device

Technical Field

The application relates to the field of traffic network information processing, in particular to a method and a device for describing traffic network information.

Background

At present, basic road network information is generally used for providing basic information to a navigation system, and the navigation system provides navigation service to a user according to the basic information.

However, basic road network information is difficult to be applied when building intelligent urban traffic, and is mainly represented in the existing basic road network, the definition of a data analysis object is too rigid, elasticity is lacked, deep data mining contents in the traffic field are difficult to support, and a unified and flexible data description mode is provided for road network entities with various shapes and colors.

Disclosure of Invention

The application provides a description method and a description device of traffic network information, which aim to solve the problem that standard definition is lacked for traffic entities in traffic network scenes in the prior art.

The application provides a description method of traffic network information, which is characterized by comprising the following steps:

constructing a basic object set for describing the information of the traffic entities according to the data characteristics of the traffic entities contained in the scene of the traffic network; the set of base objects comprises a plurality of base objects;

according to traffic entities contained in a traffic network scene, constructing a derivative object set used for describing the traffic entity information in the traffic network scene by taking the constructed basic object as a basis; the set of derived objects comprises a plurality of derived objects;

acquiring road network related information of a traffic road network to be described;

extracting traffic entities contained in the traffic network to be described according to the road network related information of the traffic network to be described, selecting a proper basic object and/or a proper derivative object for each traffic entity, and instantiating the traffic network to be described;

and mounting the information data of the traffic network to be described to the instantiated traffic network to be described, and obtaining the description of the traffic network to be described.

Optionally, the data structure of the basic object and the derived object includes a traffic entity identifier; each traffic entity identification is obtained according to an identification rule determined by the basic object or the derivative object adopted by the traffic entity identification.

Optionally, the basic object includes at least one of the following objects:

a road segment object;

an intersection object;

a fork object;

an information point object;

a point of interest object.

Optionally, the instantiated intersection object is obtained according to the following identification rule, including:

acquiring intersection center point longitude, intersection center point latitude and Z value of the instantiated intersection object, wherein the Z value is used for distinguishing three-dimensional intersections with overlapped positions;

and combining the information according to a preset mode to obtain the intersection identification of the instantiated intersection object.

Optionally, the combining the above information according to a predetermined manner to obtain the intersection identifier of the instantiated intersection object includes:

enlarging the intersection center point longitude and the intersection center point latitude by 1000 times, and rounding to obtain the processed intersection center point longitude and the processed intersection center point latitude;

respectively converting the processed longitude and the processed latitude of the center point of the intersection into thirty-two system capitalization characters, and acquiring the longitude and the latitude of the center point of the intersection consisting of the thirty-two system capitalization characters;

and combining the longitude and latitude of the intersection center point consisting of the thirty-two system capitalization characters with the Z value to obtain the intersection identification of the instantiated intersection object.

Optionally, the instantiated road segment object is obtained according to the following identification rule, and includes:

acquiring a starting point intersection identifier, a terminal point intersection identifier and a sequence number of the instantiated road segment object;

and combining the information according to a preset mode to obtain the road section identification of the instantiated road section object.

Optionally, the obtaining the segment identifier of the instantiated segment object by combining the above information according to a predetermined manner includes:

and the starting point intersection identification, the end point intersection identification and the sequence number are concatenated to obtain the section identification of the instantiated section object.

Optionally, the instantiated fork object is obtained according to the following identification rule, including:

acquiring fork center point longitude, fork center point latitude and a Z value of the instantiated fork object, wherein the Z value is used for distinguishing stereo forks with overlapped positions;

and combining the information according to a preset mode to obtain the fork identification of the instantiated fork object.

Optionally, the combining the above information according to a predetermined manner to obtain the fork identifier of the instantiated fork object includes:

expanding the fork central point longitude and the fork central point latitude by 1000 times, and rounding to obtain the processed fork central point longitude and the processed fork central point latitude;

converting the processed fork center point longitude and fork center point latitude into thirty-two system capitalization characters respectively, and acquiring fork center point longitude and latitude formed by the thirty-two system capitalization characters;

and linking the longitude and latitude of the fork center point consisting of the thirty-two system capital characters with the Z value to obtain the fork identification of the instantiated fork object.

Optionally, the instantiated information point object is obtained according to the following identification rule, including:

judging the type of the instantiated information point object;

if the type of the instantiated information point object is a section information point or a point type information point, acquiring the identification of the section to which the instantiated information point object belongs and the distance between the instantiated information point object and the downstream intersection position of the section to which the instantiated information point object belongs;

if the type is ftrid type information points, acquiring an entrance road section identifier to which the instantiated information point objects belong and an exit road section identifier to which the instantiated information point objects belong;

and combining the information according to a preset mode to obtain the information point identification of the instantiated information point object.

Optionally, the combining the information according to a predetermined manner to obtain the information point identifier of the instantiated information point object includes:

linking the identification of the section to which the instantiated information point object belongs and the distance between the instantiated information point object and the downstream intersection position of the section to which the instantiated information point object belongs, aiming at the section information point;

performing md5 calculation on the concatenated result;

and obtaining the information point identification of the instantiated information point object aiming at the md5 calculation result and the type link of the information point object.

for the point type information point, concatenating an entrance section identifier to which the instantiated information point object belongs and an exit section identifier to which the instantiated information point object belongs;

performing md5 calculation on the concatenated result;

Optionally, the instantiated point of interest object is obtained according to the following identification rule, including:

acquiring the sequence number of the instantiated point of interest object;

and obtaining the interest point identification of the instantiated interest point object according to the sequence number.

Optionally, the derived object includes at least one of the following objects:

a traffic light road section object;

a channel object;

a road object;

a regional road network object;

and (4) functional area road network objects.

The present application provides a traffic network information description device, comprising:

the basic object set construction unit is used for constructing a basic object set used for describing the traffic entity information according to the data characteristics of the traffic entities contained in the traffic network scene; the set of base objects comprises a plurality of base objects;

the derived object set construction unit is used for constructing a derived object set used for describing the traffic entity information in a traffic network scene by taking the constructed basic object as a basis according to the traffic entities contained in the traffic network scene; the set of derived objects comprises a plurality of derived objects;

the acquisition unit is used for acquiring road network related information of a traffic road network to be described;

the instantiation unit is used for extracting the traffic entities contained in the traffic network to be described according to the road network related information of the traffic network to be described, selecting a proper basic object and/or a proper derivative object for each traffic entity and instantiating the traffic network to be described;

and the mounting unit is used for mounting the information data of the traffic network to be described into the instantiated traffic network to be described so as to obtain the description of the traffic network to be described.

Optionally, the data structures of the basic object and the derived object include a traffic entity identifier; the identification of each traffic entity is obtained according to the identification rule determined by the basic object or the derivative object adopted by the traffic entity.

Optionally, the basic object includes at least one of the following objects:

a road segment object;

an intersection object;

a fork object;

an information point object;

a point of interest object.

Optionally, the instantiation unit is specifically configured to:

Optionally, the instantiation unit is further configured to:

enlarging the intersection center point longitude and the intersection center point latitude by 1000 times, and then rounding to obtain the processed intersection center point longitude and the processed intersection center point latitude;

Optionally, the instantiation unit is specifically configured to:

Optionally, the instantiation unit is further configured to:

Optionally, the instantiation unit is specifically configured to:

acquiring fork central point longitude, fork central point latitude and Z value of the instantiated intersection object, wherein the Z value is used for distinguishing stereo forks with overlapped positions;

Optionally, the instantiation unit is further configured to:

respectively converting the processed fork central point longitude and the processed fork central point latitude into thirty-two system capital characters, and acquiring the fork central point longitude and latitude formed by the thirty-two system capital characters;

and concatenating the fork center point longitude and latitude formed by the thirty-two system capitalization characters with the Z value to obtain the fork identifier of the instantiated fork object.

Optionally, the instantiation unit is specifically configured to:

judging the type of the instantiated information point object;

if the type is an ftrid type information point, acquiring an entrance road section identifier to which the instantiated information point object belongs and an exit road section identifier to which the instantiated information point object belongs;

Optionally, the instantiation unit is further configured to:

performing md5 calculation on the concatenated result;

Optionally, the instantiation unit is further configured to:

performing md5 calculation on the concatenated result;

Optionally, the instantiation unit is specifically configured to:

acquiring the sequence number of the instantiated point of interest object;

Optionally, the derived object includes at least one of the following objects:

a traffic light road section object;

a channel object;

a road object;

a regional road network object;

and (4) functional area road network objects.

The application provides an electronic device, the electronic device includes:

a processor;

a memory for storing a program that, when read and executed by the processor, performs the following:

constructing a basic object set for describing the traffic entity information according to the data characteristics of the traffic entities contained in the traffic network scene; the set of base objects comprises a plurality of base objects;

The present application provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of:

constructing a basic object set for describing the traffic entity information according to the data characteristics of the traffic entities contained in the traffic network scene; the set of base objects includes a plurality of base objects;

By adopting the method provided by the application, the basic object set and the derivative object set for describing the traffic entities are provided according to the data characteristics of the traffic entities contained in the traffic network scene, each level of the traffic entities is defined, more flexible description of the traffic network information is realized, more requirements on the traffic network information in reality are met, so that a uniform and flexible description mode is provided for various road network entities in the traffic network scene, and uniform description of complicated road networks is realized.

Drawings

Fig. 1 is a flowchart of a first embodiment of a method for describing a traffic network according to the present application.

Fig. 2 is a schematic diagram of an example of intersection link relationships according to the first embodiment of the present application.

Fig. 3 is a hierarchical object relationship diagram of a unified road network center according to the first embodiment of the present application.

Fig. 4 is a flowchart of a second embodiment of a traffic network describing apparatus provided in the present application.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of implementation in many different ways than those herein set forth and of similar import by those skilled in the art without departing from the spirit and scope of this application, and thus this application is not limited to the specific implementations disclosed below.

A first embodiment of the present application provides a method. Please refer to fig. 1, which is a flowchart illustrating a first embodiment of the present application. The first embodiment of the present application will be described in detail below with reference to fig. 1. The method comprises the following steps:

step S101, constructing a basic object set for describing traffic entity information according to data characteristics of traffic entities contained in a traffic network scene; the set of base objects includes a plurality of base objects.

The method comprises the following steps of constructing a basic object set for describing traffic entity information according to data characteristics of traffic entities contained in a traffic network scene; the set of base objects includes a plurality of base objects.

The basic object is an abstract object in a concept world, and is used for extracting and generalizing common characteristics of traffic entities; specifically, traffic entities in the road network, such as intersections and junctions, can be the basic objects. The traffic entity refers to one element or a set of a plurality of elements in a road network. The elements here may be road segments, intersections, bifurcations, etc. The traffic entity may be a channel composed of a plurality of continuous road segments, a specific road segment, or a collection of a plurality of intersections that need attention.

When the method is specifically implemented in a computer, the method can be a table structure in a database of Mysql, Oracle and the like, such as the following tables 1 and 2; or may be a structure of a structured language such as C language; or base class (base class) in object-oriented languages such as JAVA, C + +, Python, etc.; the present application does not set any limitation on the implementation of the basic object.

The traffic entities comprise road sections, intersections, fork joints, interest points, information points and the like. The road section is a basic road section in the brain of the city and is determined according to important intersections of important roads. In the traffic field, important roads and intersections are rarely changed, the change frequency is far lower than that of branch roads, and the branch roads are not important concerns for analyzing traffic laws. The intersection refers to a crossing point which is generally important in a road network and has high flow, such as a signal light intersection, and the grade of two roads is the crossing point above a secondary main road. The fork is a non-intersection, but must be distributed on a road segment, and the road segment is not necessarily broken by the fork, and the intersection has influence on the traffic information of the road segment. The interest points refer to position information points on the electronic map, such as scenic spots, government agencies, companies and the like. The information point is an analysis target on which traffic information is mounted.

The data structures of the basic object and the derivative object comprise traffic entity identification; the identification of each traffic entity is obtained according to the identification rule determined by the basic object or the derivative object adopted by the traffic entity.

The traffic entity identification is used for identifying the traffic entity.

The base object comprises at least one of the following objects:

a road segment object;

an intersection object;

a fork object;

an information point object;

a point of interest object.

The link object is used to describe a link, and its attributes can be referred to as shown in table 1 below, which is a link object described using SQL database fields.

TABLE 1

The instantiated road segment object is obtained according to the following identification rule, and the method comprises the following steps:

and combining the information according to a preset mode to obtain the section identification of the instantiated section object.

The combining the above information according to a predetermined manner to obtain the road segment identifier of the instantiated road segment object includes:

and connecting the starting point intersection identification, the ending point intersection identification and the sequence number to obtain the section identification of the instantiated section object.

For example, the section identifier of the instantiated section object may adopt a starting point intersection identifier + an end point intersection identifier + a sequence number (when a plurality of sections exist between the starting point intersection and the end point intersection, a sequence number with a high road grade is in front, if the road grades are the same, encoding is started in a counterclockwise direction, and values are 0-9, a-U).

The intersection object is used to describe an intersection, and its attributes can be referred to as shown in table 2 below, which is an intersection object described using SQL database fields.

TABLE 2

The instantiated intersection object is obtained according to the following identification rules, and the method comprises the following steps:

The combining the above information according to a predetermined manner to obtain the intersection identifier of the instantiated intersection object includes:

respectively converting the processed longitude and latitude of the center point of the intersection into thirty-two system capitalization characters, and acquiring the longitude and latitude of the center point of the intersection consisting of the thirty-two system capitalization characters;

The following describes in detail a method for acquiring an intersection identifier of an instantiated intersection object.

Firstly, encoding is carried out by adopting longitude and latitude of a central point of the intersection to generate a globally unique code, and the length is fixed by 13 bits. The encoding rule is as follows:

for example: the coordinates of the central point of the intersection are as follows: 121.485733,31.234692.

Then, rounding up the longitude and latitude of the center point of the intersection to 10000 to be used as a calculation base:

the coordinate base of the example intersection inter _ id code is: 1214857, 312347.

Then, the longitude and latitude of the base number are converted into the thirty-two system capitalization characters, and the supplementary 5 characters of less than 5 characters are filled up:

the example intersection is calculated to be 152C9, 09H 0R.

And further acquiring a crossing Z value to distinguish the three-dimensional crossings with overlapped positions, wherein the default is 0, and values are sequentially taken from 0 to 9, A to U:

an example intersection is 0.

And finally, splicing to form the intersection identification of the instantiated intersection object. The rule is specifically as follows: thirty-two longitude + thirty-two latitude + Z value:

the intersection of the intersection object that the example intersection finally instantiated is identified as 152C909H0R 0.

The fork object is used to describe the fork, and its attributes can be referred to as shown in table 3 below, which is a fork object described using SQL database fields.

TABLE 3

The instantiated fork object is obtained according to the following identification rule, and the identification rule comprises the following steps:

The combining the above information according to a predetermined manner to obtain the fork identifier of the instantiated fork object includes:

The method for obtaining the instantiated intersection object is similar to the intersection object, please refer to the method for obtaining the instantiated intersection object

The point of interest object is used to describe a point of interest, and its attributes can be referred to as shown in table 4 below, which is a point of interest object described using SQL database fields.

TABLE 4

The instantiated point of interest objects are obtained according to the following identification rules, including:

acquiring the sequence number of the instantiated point of interest object;

The sequence number may be an integer variable starting from 0 that performs a self-increment operation each time a point-of-interest object is instantiated. In this way, the point of interest identification of each instantiated point of interest object is different.

The information point object is used to describe the information point, and its attributes can be referred to as shown in the following tables 5, 6, and 7, which are information point objects described using SQL database fields.

TABLE 5 Attribute description for Cross-section type information Point object

TABLE 5

Table 6 is a description of the attributes of the Point type information Point object

TABLE 6

TABLE 7 Attribute description for ftrid type inode object

TABLE 7

The instantiated information point objects are obtained according to the following identification rules, including:

judging the type of the instantiated information point object;

The information point types include a section information point 01, a point type information point 02, and an ftrid type information point 03.

The method for obtaining the information point identification of the instantiated information point object comprises the following steps: for section type information points: 01+ md5 (link to which information point belongs + "_" + distance from the downstream intersection position of the link to which information point belongs), for an ftrid type information point: 03+ md5 (entry link identification + exit link identification), for point type information point: 02+ md5 (link to which information point belongs + "_" + distance from the downstream intersection position of the link to which information point belongs + lane marker). Wherein, md5 is md5 hash function, which is used to hash the content inside the parentheses after md 5.

The set of base objects provided herein may also include a road segment-intersection relationship object.

The instantiated road section-intersection relation object is obtained according to the following identification rules, and the method comprises the following steps:

acquiring an entrance road section identifier, an exit road section identifier and an intersection identifier of the instantiated road section-intersection relation object;

and combining the information according to a preset mode to obtain the road section-intersection relation identification of the instantiated road section-intersection relation object.

TABLE 8 Attribute description for road segment-intersection relationship objects

TABLE 8

The method for obtaining the road section-intersection relation identification of the instantiated road section-intersection relation object comprises the following steps: md5 (incoming road segment identification + outgoing road segment identification + intersection identification).

The f _ angle and t _ angle calculation logic in table 8 is described in detail below.

FIG. 2 depicts an intersection for east-west entry and exit lanes, 1, 2 being the penultimate and penultimate points, respectively, of the west entry lane; 3, 4 are respectively the penultimate point and the penultimate point of the east entry lane; 5, 6 are the first and second points of the east exit lane, respectively; 7, 8 minutes are the first and second points of the west exit.

The f _ angle is calculated as follows:

and taking the last-to-last longitude and latitude points and the last-to-last longitude and latitude points of the entrance lane rid, and calculating the angle from the last-to-last point to the last-to-last point relative to the due north direction to be used as the angle of the entrance lane entering the intersection.

The angle at which the east entry road enters the intersection in fig. 2 calculates the angle at which point 4 to point 3 are about 90 degrees relative to true north, and the angle at which the west entry road enters the intersection is about 270 degrees relative to true north at point 2 to point 1.

the t _ angle is calculated as follows:

and taking the first longitude and latitude point and the second longitude and latitude point of the exit road section, and calculating the angle of the first point to the second point relative to the due north direction as the angle of the exit road leaving the intersection.

The angle at which the east exit lane enters the intersection as in fig. 2 calculates the angle at which point 5 to point 6 are about 90 degrees relative to true north, and the angle at which the west exit lane enters the intersection is about 270 degrees relative to true north at point 7 to point 8.

Step S102, according to traffic entities contained in a traffic network scene, a derivative object set used for describing the traffic entity information in the traffic network scene is constructed by taking the constructed basic object as a basis; the set of derived objects includes a plurality of derived objects.

The method comprises the steps of constructing a derivative object set used for describing information of traffic entities in a traffic network scene according to the traffic entities contained in the traffic network scene by taking the constructed basic objects as the basis; the set of derived objects includes a plurality of derived objects.

In the computer, the derived object can be a table structure in a database such as Mysql, Oracle and the like, and the table structure as the derived object contains the attribute characteristics of the table structure as the basic object; the structure may be a structure of a structured language such as C language, and the structure as a derivative object includes attribute features in the structure as a base object; or may be derived classes (derived classes) in object-oriented languages such as JAVA, C + +, Python and the like, wherein the derived classes are derived from base classes; the present application does not set any limitation on the implementation of the derived object.

The derived object in this embodiment is obtained from the base object. A derived object may be attributed to a basic object, that is, a subordinate concept of a basic object, and specifically may be obtained by specially defining some attribute information in the basic object; for example, if the "direction" attribute of the road segment basic object is defined as "one-way", the derived object of "one-way road segment" is obtained, which is more convenient when the road network entity of the one-way road segment needs to be described. The derived object can also be generated by combining several basic objects, for example, several "intersection" basic objects and several "road section" basic objects are combined to form a "road network" derived object. In summary, the base object can be considered a base part, while the derivative objects can be considered base "parts" formed from the base object further processed and combined closer to a particular road network entity. The derived objects must be generated from the base objects in a variety of ways.

Several examples of derived objects are given below. In this example, the derived objects such as a road object between traffic lights, a passage object, a road object, a regional road network object, a functional road network object, etc. can be obtained through the basic object of the road object.

The derived object comprises at least one of the following objects:

a traffic light road section object;

a channel object;

a road object;

a regional road network object;

and (4) functional area road network objects.

The traffic light road section object is used for describing a road section set between two adjacent signal lights;

the channel object is used for describing a self-defined road section set;

the road object is used for describing a road section set determined according to the name of the road;

the regional road network object is used for describing a road section set defined according to a specific region;

the functional road network object is used for describing a road section set of the custom area.

Step S103, obtaining road network related information of the traffic road network to be described.

The step is used for obtaining road network related information of the traffic road network to be described.

The traffic network to be described herein may be the road segment, the channel, the road, etc. between the traffic lights mentioned in step S102, and may also be a combination of any traffic entities, such as an entire traffic network of some arbitrarily defined area, or a traffic network of some administrative area.

The road network related information comprises basic information of traffic entities (such as road sections, channels, intersections and the like) contained in the road network, such as road section length and intersection longitude and latitude; some real-time information or historical information of the traffic entity is also included, such as the current traffic flow information of the road section, the historical traffic flow information of the road section, and the like.

Step S104, extracting the traffic entities contained in the traffic network to be described according to the road network related information of the traffic network to be described, selecting a proper basic object or a proper derivative object for each traffic entity, and instantiating the traffic network to be described.

The step is used for extracting the traffic entities contained in the information according to the road network related information of the traffic network to be described, selecting a proper basic object and/or a proper derivative object for each traffic entity and instantiating the traffic network to be described.

Instantiation refers to instantiating the basic object and the derived object, for example, instantiating a base class and a derived class in a C + + language, and acquiring an object corresponding to the base class or the derived class.

Specifically, for the embodiment, the instantiation refers to specifically assigning or defining corresponding parameters in a certain specific traffic entity to be described according to specific information of the traffic entity after selecting a suitable basic object or derivative object describing the traffic entity to be described; a detailed description of the particular traffic entity is obtained. After each traffic entity of one traffic network is instantiated, the whole traffic network is instantiated.

For example, for a road segment object, the road segment name and the road segment net length in the road segment object need to be assigned according to specific information of the road segment, such as the road segment name and the road segment net length. After all road network entities such as road sections, intersections and the like included in a traffic network to be described are instantiated, the instantiated traffic network to be described can be finally obtained according to the connection relationship among the instantiated entity records.

Step S105, the information data of the traffic network to be described are mounted in the instantiated traffic network to be described, and the description of the traffic network to be described is obtained.

The step is used for mounting the information data of the traffic network to be described into the instantiated traffic network to be described, and obtaining the description of the traffic network to be described.

A large amount of information data exist in the existing traffic system, and the information data are mounted in the instantiated traffic road network to be described, so that the description of the traffic road network to be described is obtained.

The traffic network to be described may include the traffic entities described by the basic objects, and may also include the traffic entities described by the derivative objects. The mounting comprises assigning values to a base object or a derived object; the mounting is the description of transmitting data to the corresponding instantiated traffic entity in the instantiated traffic network; the instantiated traffic network in the previous step is only to make the network entities obtain basic definition, i.e. static network can be formed, however, an actual network will continuously generate a lot of continuously changing data, and the data is transmitted to each network entity by means of mounting.

For example, for a specific link traffic flow, historical link traffic flow and other information are mounted under the link, so that the traffic flow information of the link can be obtained by accessing the instantiated link object, and a richer description of the traffic network information can be obtained.

Fig. 3 is a graph of an object hierarchical relationship of a unified road network center according to the solution provided in the present application.

By adopting the method, the related traffic network information can be obtained from the existing standard-definition and high-definition map and used as the traffic network information to be described. Extracting the traffic entities contained in the traffic network, selecting a proper basic object and/or a proper derivative object for each traffic entity, and instantiating the traffic network to be described; and mounting the information data of the traffic network to be described to the instantiated traffic network to be described, and obtaining the information description of the traffic network to be described.

On the contrary, on the basis of the information, the electronic map of a traffic network can be easily obtained by combining with an image engine and the like, and the relevant information of a specific network entity can be accessed and obtained through a graphical interface at any time; such as traffic information for a certain road segment.

Compared with the prior art, the description of the traffic network to be described obtained by the method is richer and more flexible, and can be conveniently expanded and changed. Therefore, the method can realize the bottom layer description of the traffic network information, can obtain the information which is convenient to process from the map, and can generate the electronic map easily by utilizing the information.

In the above embodiments, a description method of traffic network information is provided, and correspondingly, a description device of traffic network information is also provided in the present application. Please refer to fig. 4, which is a flowchart illustrating an embodiment of a device for describing traffic network information according to the present application. Since this embodiment, i.e., the second embodiment, is substantially similar to the method embodiment, it is relatively simple to describe, and reference may be made to some descriptions of the method embodiment for relevant points. The device embodiments described below are merely illustrative.

A traffic network information description apparatus according to this embodiment includes:

a basic object set constructing unit 401, configured to construct a basic object set used for describing the traffic entity information according to data features of traffic entities included in a traffic network scene; the set of base objects includes a plurality of base objects;

a derived object set constructing unit 402, configured to construct, according to a traffic entity included in a traffic network scene, a derived object set used for describing information of the traffic entity in the traffic network scene based on the constructed basic object; the set of derived objects comprises a plurality of derived objects;

an obtaining unit 403, configured to obtain road network related information of a traffic road network to be described;

an instantiation unit 404, configured to extract traffic entities included in the to-be-described traffic network according to the road network related information of the to-be-described traffic network, select a suitable base object and/or suitable derivative object for each traffic entity, and instantiate the to-be-described traffic network;

a mounting unit 405, configured to mount the information data of the traffic network to be described to the instantiated traffic network to be described, so as to obtain a description of the traffic network to be described.

In this embodiment, the data structures of the basic object and the derived object include a traffic entity identifier; the identification of each traffic entity is obtained according to the identification rule determined by the basic object or the derivative object adopted by the traffic entity.

In this embodiment, the basic object includes at least one of the following objects:

a road segment object;

an intersection object;

a fork object;

an information point object;

a point of interest object.

In this embodiment, the instantiation unit is specifically configured to:

acquiring fork center point longitude, fork center point latitude and a Z value of the instantiated intersection object, wherein the Z value is used for distinguishing the stereo fork with overlapped positions;

In this embodiment, the instantiation unit is specifically configured to:

judging the type of the instantiated information point object;

In this embodiment, the instantiation unit is specifically configured to:

acquiring the sequence number of the instantiated point of interest object;

In this embodiment, the derived object includes at least one of the following objects:

a traffic light road section object;

a channel object;

a road object;

a regional road network object;

and (4) functional area road network objects.

The third embodiment of the present application provides an electronic device, including:

a processor;

A fourth embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor, performs the steps of:

and mounting the information data of the traffic network to be described into the instantiated traffic network to be described, and obtaining the description of the traffic network to be described.

Although the present application has been described with reference to the preferred embodiments, it is not intended to limit the present application, and those skilled in the art can make variations and modifications without departing from the spirit and scope of the present application, therefore, the scope of the present application should be determined by the claims that follow.

In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.

1. Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include non-transitory computer readable media (transient media), such as modulated data signals and carrier waves.

2. As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.

Claims

1. A description method of traffic network information is characterized by comprising the following steps:

extracting traffic entities contained in the traffic network to be described according to the road network related information of the traffic network to be described, selecting a proper basic object and/or a proper derivative object for each traffic entity, and instantiating the traffic network to be described; wherein instantiating the traffic network to be described comprises: according to the specific information of each traffic entity, performing specific assignment or definition on corresponding parameters in the appropriate base object and/or the appropriate derivative object selected for each traffic entity;

2. The method for describing traffic network information according to claim 1, wherein the data structure of said basic object and said derived object includes traffic entity id; each traffic entity identification is obtained according to an identification rule determined by the basic object or the derivative object adopted by the traffic entity identification.

3. The method for describing traffic network information according to claim 2, wherein said basic object comprises at least one of the following objects:

a road segment object;

an intersection object;

a fork object;

an information point object;

a point of interest object.

4. The method for describing traffic network information according to claim 3, wherein the instantiated intersection object is obtained according to the following identification rule, comprising:

5. The method for describing traffic network information according to claim 4, wherein said combining said information according to a predetermined manner to obtain said intersection id of said instantiated intersection object comprises:

6. The method for describing traffic network information according to claim 5, wherein the instantiated road segment object is obtained according to the following identification rule, comprising:

7. The method for describing traffic network information according to claim 6, wherein said combining the above information according to a predetermined manner to obtain the link identifier of the instantiated link object comprises:

8. Method for describing traffic network information according to claim 3, characterized in that instantiated fork objects are obtained according to the following identification rules, comprising:

acquiring fork central point longitude, fork central point latitude and Z value of the instantiated fork object, wherein the Z value is used for distinguishing stereo forks with overlapped positions;

9. The method for describing traffic network information according to claim 8, wherein said combining said information according to a predetermined manner to obtain said fork id of said instantiated fork object comprises:

10. The method for describing traffic network information according to claim 3, wherein the instantiated information point objects are obtained according to the following identification rules, comprising:

judging the type of the instantiated information point object;

if the type of the instantiated information point object is a section information point or a point type information point, acquiring the identifier of the road section to which the instantiated information point object belongs and the distance between the instantiated information point object and the downstream intersection position of the road section to which the instantiated information point object belongs;

11. The method for describing traffic network information according to claim 10, wherein said combining said information according to a predetermined manner to obtain said information point id of said instantiated information point object comprises:

performing md5 calculation on the concatenated result;

12. The method for describing traffic network information according to claim 10, wherein said combining said information according to a predetermined manner to obtain said information point id of said instantiated information point object comprises:

for the point type information point, linking an entrance road section identifier to which the instantiated information point object belongs and an exit road section identifier to which the instantiated information point object belongs;

performing md5 calculation on the concatenated result;

13. The method for describing traffic network information according to claim 3, wherein the instantiated point of interest objects are obtained according to the following identification rules, comprising:

acquiring the sequence number of the instantiated point of interest object;

14. The method for describing traffic network information according to claim 1, wherein said derived objects comprise at least one of the following objects:

a traffic light room road segment object;

a channel object;

a road object;

a regional road network object;

and (4) functional area road network objects.

15. A traffic network information description apparatus, comprising:

the basic object set construction unit is used for constructing a basic object set used for describing the traffic entity information according to the data characteristics of the traffic entities contained in the traffic network scene; the set of base objects includes a plurality of base objects;

the instantiation unit is used for extracting the traffic entities contained in the information according to the road network related information of the traffic network to be described, selecting a proper basic object and/or a proper derivative object for each traffic entity and instantiating the traffic network to be described; wherein instantiating the traffic network to be described comprises: according to the specific information of each traffic entity, performing specific assignment or definition on corresponding parameters in the appropriate base object and/or the appropriate derivative object selected for each traffic entity;

16. The apparatus for describing traffic network information according to claim 15, wherein the data structure of the base object and the derived object includes a traffic entity identifier; each traffic entity identification is obtained according to an identification rule determined by the basic object or the derivative object adopted by the traffic entity identification.

17. The apparatus for describing traffic network information according to claim 16, wherein said basic object comprises at least one of the following objects:

a road segment object;

an intersection object;

a fork object;

an information point object;

a point of interest object.

18. The device for describing traffic network information according to claim 17, wherein the instantiation unit is specifically configured to:

19. The apparatus for describing traffic network information according to claim 18, wherein the instantiation unit is further configured to:

20. The device for describing traffic network information according to claim 19, wherein the instantiation unit is specifically configured to:

21. The traffic network information describing device of claim 19, wherein the instantiation unit is further configured to:

and connecting the starting point intersection identification, the end point intersection identification and the sequence number to obtain the section identification of the instantiated section object.

22. The device for describing traffic network information according to claim 17, wherein the instantiation unit is specifically configured to:

23. The traffic network information describing device of claim 22, wherein the instantiation unit is further configured to:

24. The device for describing traffic network information according to claim 17, wherein the instantiation unit is specifically configured to:

judging the type of the instantiated information point object;

25. The traffic network information describing device of claim 17, wherein the instantiation unit is further configured to:

linking the identification of the section to which the instantiated information point object belongs and the distance between the instantiated information point object and the downstream intersection position of the section to which the instantiated information point object belongs aiming at the section information point;

performing md5 calculation on the concatenated result;

26. The traffic network information describing device of claim 17, wherein the instantiation unit is further configured to:

aiming at the point type information point, interlinking an entrance road section identifier to which the instantiated information point object belongs and an exit road section identifier to which the instantiated information point object belongs;

performing md5 calculation on the concatenated result;

27. The traffic network information description apparatus according to claim 17, wherein said instantiation unit is specifically configured to:

acquiring the sequence number of the instantiated point of interest object;

28. Apparatus for describing traffic network information according to claim 15, characterized in that said derived objects comprise at least one of the following objects:

a traffic light road section object;

a channel object;

a road object;

a regional road network object;

and (4) functional area road network objects.

29. An electronic device, comprising:

a processor;

30. A computer-readable storage medium on which a computer program is stored, the program, when executed by a processor, performing the steps of: