CN107806883B - Navigation method and device - Google Patents
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- CN107806883B CN107806883B CN201610811454.6A CN201610811454A CN107806883B CN 107806883 B CN107806883 B CN 107806883B CN 201610811454 A CN201610811454 A CN 201610811454A CN 107806883 B CN107806883 B CN 107806883B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/34—Route searching; Route guidance
- G01C21/3446—Details of route searching algorithms, e.g. Dijkstra, A*, arc-flags, using precalculated routes
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Abstract
The invention provides a navigation method and a navigation device. The method comprises the following steps: receiving a path planning request carrying a starting point and a terminal point; planning a navigation path from a starting point to an end point according to locally stored basic navigation data, wherein the basic navigation data comprises POI data and road data; and acquiring additional navigation data for navigation guidance according to the current position of the user in the process of navigating based on the navigation path. The invention pre-stores basic navigation data locally, can realize basic navigation function through the basic navigation data, obtains additional navigation data for navigation guidance in the navigation process, realizes the integration navigation of the local network through the scheme, can provide basic navigation function when off-line on the basis of storing a small amount of data locally, and can provide high-quality navigation service when on-line.
Description
Technical Field
The present invention relates to the field of navigation technologies, and in particular, to a navigation method and apparatus.
Background
The current navigation methods mainly include the following two methods:
method 1, off-line navigation. The method comprises the steps that a user downloads all navigation data (including POI data, road data, TMC data, navigation guide data and the like) in cities in advance, and when a path planning request sent by the user is received, path planning and subsequent navigation are carried out according to the navigation data stored locally;
The method 1 needs to store a large amount of data locally, the storage space of the existing terminal equipment is small as a whole, the method 1 needs to consume a large amount of storage space of the terminal equipment, and the method may not be suitable for some terminal equipment;
the method 2 depends on a good network environment, and when the network environment is poor, navigation data cannot be requested from a server side, so that the problem of navigation failure is caused.
Disclosure of Invention
In view of this, the present invention provides a navigation method and apparatus, so as to solve the technical problems that the off-line navigation method in the prior art needs to consume a large amount of storage space of the terminal device and the on-line navigation method fails in navigation without a network. The technical scheme is as follows:
based on one aspect of the invention, the invention provides a navigation method, which comprises the following steps:
receiving a path planning request carrying a starting point and a terminal point;
planning a navigation path from a starting point to an end point according to locally stored basic navigation data, wherein the basic navigation data comprises POI (point of interest) data and road data;
and acquiring additional navigation data for navigation guidance according to the current position of the user in the process of navigating based on the navigation path.
Based on another aspect of the present invention, the present invention further provides a navigation device, comprising:
the receiving module is used for receiving a path planning request carrying a starting point and a terminal point;
the planning module is used for planning a navigation path from a starting point to an end point according to locally stored basic navigation data, wherein the basic navigation data comprises POI (point of interest) data and road data;
and the acquisition module is used for acquiring additional navigation data for navigation guidance according to the current position of the user in the process of navigating based on the navigation path.
The navigation method provided by the invention is characterized in that basic navigation data are stored locally in advance, and when a path planning request carrying a starting point and an end point is received, a navigation path from the starting point to the end point is planned according to the locally stored basic navigation data; and, additional navigation data for navigation guidance is acquired according to the current position of the user during the navigation process. The basic navigation data has less data volume and can meet the basic navigation function, so the technical scheme of the invention can provide the basic navigation function in an off-line state on the basis of locally storing a small amount of data, and provides high-quality navigation service by acquiring additional navigation data during networking.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flow chart of a navigation method provided by the present invention;
FIG. 2 is a flow chart of a method of acquiring additional navigation data provided by the present invention;
FIG. 3 is a second flowchart of a navigation method provided by the present invention;
FIG. 4 is a schematic diagram of the generation of N grids in accordance with the present invention;
FIG. 5 is a third flowchart of a navigation method provided by the present invention;
FIG. 6 is a fourth flowchart of the navigation method provided by the present invention;
FIG. 7 is a schematic structural diagram of a navigation device according to the present invention;
FIG. 8 is a schematic structural diagram of an acquisition module according to the present invention;
fig. 9 is a second schematic structural diagram of an acquisition module according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The navigation method and the navigation device provided by the invention are suitable for a cross-region navigation scene, and the navigation method can be executed in terminal equipment (such as a smart phone, a tablet personal computer and the like) and can also be executed at a vehicle-mounted end. The current map data manufacturers store navigation data in a manner of storing the navigation data according to cities, for example, each city corresponds to a file, and all navigation data (including POI data, road data TMC data, navigation guidance data, and the like) of the city are stored in the file.
According to the embodiment of the invention, the navigation data is divided into three types of data in advance according to the functions of the navigation data:
the first type, basic navigation data, is data required for implementing basic navigation, such as implementing route planning and basic map element display, i.e. basic navigation data includes POI data and road data.
Second, additional navigation data for navigation guidance, such as including DTM (digital terrestrial Model), digital terrestrial Model data, satellite map data, POI depth information, navigation guidance data, and the like
Third, real-time traffic data.
The navigation method provided by the invention is shown in fig. 1, and specifically comprises the following steps:
The starting point and the end point in the path planning request may be the starting point and the end point input by the user in a corresponding input box in a navigation path planning interface of the vehicle-mounted terminal or the terminal device, or the starting point and the end point selected by the user in an electronic map interface in a click-and-select manner.
And 102, planning a navigation path from the starting point to the end point according to the locally stored basic navigation data.
In the embodiment of the invention, the method for planning the navigation path can adopt a bidirectional A algorithm, a Dijkstra algorithm and the like which are commonly used in the industry at present, and the application is not strictly limited.
And 103, acquiring additional navigation data for navigation guidance according to the current position of the user in the process of navigating based on the navigation path.
In the invention, the additional navigation data for navigation guidance is acquired in real time according to the current position of the user in the process of navigating the navigation path from the starting point to the end point planned according to the locally stored basic navigation data, so that the navigation precision is further improved, and the navigation experience of the user is improved. The specific step 103 of the present invention can be implemented as follows, as shown in fig. 2 from step 1031 to step 1035:
and step 1031, in the process of navigating based on the navigation path, positioning the user according to a preset time period to obtain the current position of the user.
In the embodiment of the invention, a plurality of modes for positioning the user are provided, such as GPS positioning, network positioning (such as base station positioning, wifi positioning and the like), sensor fusion positioning and the like, and the method is not strictly limited.
And 1032, generating N grids by taking the current position of the user as a central point, wherein N is a preset positive integer which is greater than or equal to 1.
In the embodiment of the present invention, N may be 9, 16, 25, 36, 49, etc., and the present application is not limited thereto.
In the embodiment of the invention, the common geographic area can be a geographic area where the user has a long wait, such as a home, a company, or a city where the user is located, and because the user has frequent activities in the common geographic area, in order to further improve the navigation efficiency of the user in the common geographic area, the navigation data in the common geographic area is downloaded and stored locally in advance, and then the navigation is performed in the common geographic area by directly adopting the locally stored navigation data.
In this embodiment of the present invention, step 1033 may be to traverse the grids, and determine, for each traversed grid, whether the grid is included in the common geographic area of the user, specifically as follows: and when all or more than a certain proportion of boundary points of the grid are judged to fall into the common geographic area, determining that the grid is contained in the common geographic area.
In step 1035, additional navigation data corresponding to the grid is obtained from the server side.
In the embodiment of the invention, the terminal device or the vehicle-mounted terminal establishes network connection with the server terminal and sends a data acquisition request carrying the grid identifier of the grid to the server terminal so as to acquire additional navigation data corresponding to the grid from the server terminal.
Preferably, the distance traveled by the user in the time interval between two adjacent periods in the navigation process is not too far, so that the same grid exists in the N grids generated in the previous period and the N grids generated in the next period, and therefore, in order to further accelerate the acquisition efficiency of the additional navigation data, in the embodiment of the present invention, when the additional navigation data of the N grids generated in one period is acquired, the additional navigation data of the N grids in the period is cached, so that when the N grids in the next period and the N grids in the period have the same grid, the additional navigation data of the same grid is directly acquired from the cache, and is not required to be acquired from the server, and the data acquisition efficiency is improved.
Thus, as shown in fig. 3, before executing step 1035, the present invention may further include:
at step 1036, it is determined whether the grid is the same as the grid of the previous cycle cached in the cache, if so, step 1037 is performed, otherwise, step 1035 is performed.
At step 1037, additional navigation data for the grid is retrieved from the cache.
Specifically, as shown in fig. 4, for example, when the user in the previous cycle is located at S1, 9 grids are generated, and when the user in the current cycle is located at S2, 9 grids are generated again, and it is obvious that 3 grids of the 9 grids generated in the previous cycle are the same as 3 grids of the 9 grids generated in the current cycle, as shown by the shaded portions in fig. 4. Although the same 3 grids are not included in the common geographic area preset by the user, the additional navigation data of the same 3 grids are already cached, so that the additional navigation data of the 3 grids in the period does not need to be acquired from the server side, and the additional navigation data of the 3 grids can be acquired from the cache.
Preferably, in order to further reduce the local data storage amount, after acquiring additional navigation data according to the current position of the user in step 103, the embodiment of the present invention may further include step 104:
and 104, erasing the additional navigation data of the grid of the previous period cached in the cache, and caching the additional navigation data of the N grids of the current period. As shown in particular in fig. 5.
Preferably, in order to facilitate the user to know the road condition in time, in the embodiment of the present invention, the current network environment is determined in the navigation process, and if the current network environment is good, the real-time traffic data of the administrative division where the current position of the user is located is downloaded. Since the real-time traffic data is generally updated according to a certain period (e.g., 2 minutes), the real-time traffic data can be downloaded according to the period when the network environment is good. Specifically, the present invention may further include, as shown in fig. 6:
and 105, judging whether the current network meets preset excellent network environment conditions, if so, executing the step 106, and if not, not processing.
The good network environment condition refers to a preset condition for measuring whether the network environment is good, for example, the strength of the network signal reaches a preset strength threshold, or the data downloading speed reaches a preset speed threshold.
And 106, acquiring real-time traffic data of the administrative district where the current position is located from the server side, and rendering the acquired real-time traffic data.
In the embodiment of the present invention, the administrative division where the current location is located may refer to a city, a county, and the like where the current location is located.
In the embodiment of the present invention, the execution sequence of the foregoing step 104 and steps 105 to 106 is not limited strictly, and the step 104 may be executed first and then the steps 105 to 106 may be executed, or the step 105 to the step 106 may be executed first and then the step 104 is executed.
Based on the same concept of the navigation method provided by the previous text invention, the present invention further provides a navigation device, as shown in fig. 7, the navigation device comprising: a receiving module 100, a planning module 200 and an obtaining module 300, wherein:
a receiving module 100, configured to receive a path planning request carrying a start point and an end point;
a planning module 200, configured to plan a navigation path from a starting point to an end point according to locally stored basic navigation data, where the basic navigation data includes POI data and road data;
an obtaining module 300, configured to obtain additional navigation data for navigation guidance according to a current location of a user in a process of performing navigation based on the navigation path.
Specifically, the obtaining module 300 in the present invention includes, as shown in fig. 8:
a positioning sub-module 301, configured to position a user according to a preset time period in a navigation process based on the navigation path, to obtain a current position of the user;
the grid generation submodule 302 is configured to generate N grids with the current position of the user as a central point, where N is a preset positive integer greater than or equal to 1;
a first determining submodule 303, configured to determine, for each grid, whether the grid is included in a common geographic area preset by the user, if yes, trigger a first obtaining submodule 304, and if not, trigger a second obtaining submodule 305;
a first obtaining sub-module 304, configured to obtain additional navigation data of the grid from locally pre-stored additional navigation data of the common geographic area;
the second obtaining sub-module 305 is configured to obtain additional navigation data corresponding to the grid from the server side.
Preferably, the obtaining module 300 may further include a third obtaining sub-module 306, as shown in fig. 9:
the first determining submodule 303 is further configured to, before triggering the second obtaining submodule 305, determine whether the grid is the same as the grid of the previous cycle cached in the cache, if the grid is the same as the grid of the previous cycle cached in the cache, trigger the third obtaining submodule 306, and if the grid is not the same as the grid of the previous cycle cached in the cache, trigger the second obtaining submodule 305;
a third retrieving submodule 306 is configured to retrieve additional navigation data for the grid from the cache.
Preferably, the navigation device shown in fig. 7 further comprises:
the erasing module is used for erasing the additional navigation data of the grid of the previous period cached in the cache;
and the cache module is used for caching the additional navigation data of the N grids in the current period.
Preferably, the navigation device in the foregoing embodiment may further include:
the first judgment module is used for judging whether the current network meets the preset excellent network environment condition or not, and if so, the real-time traffic data acquisition module is triggered;
the real-time traffic data acquisition module is used for acquiring real-time traffic data of an administrative division where the current position is located from the server side;
and the rendering module is used for rendering the acquired real-time traffic data.
It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. For the device-like embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The navigation method and apparatus provided by the present invention are described in detail above, and the principle and the implementation of the present invention are explained in detail herein by applying specific examples, and the description of the above examples is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (8)
1. A method of navigation, the method comprising:
receiving a path planning request carrying a starting point and a terminal point;
planning a navigation path from a starting point to an end point according to locally stored basic navigation data, wherein the basic navigation data comprises POI (point of interest) data and road data;
in the process of navigating based on the navigation path, acquiring additional navigation data for navigation guidance according to the current position of a user;
wherein, in the process of navigating based on the navigation path, acquiring additional navigation data according to the current position of the user comprises:
in the process of navigating based on the navigation path, positioning the user according to a preset time period to obtain the current position of the user;
generating N grids by taking the current position of the user as a central point, wherein N is a preset positive integer which is more than or equal to 1;
judging whether each grid is contained in a common geographical area preset by the user or not according to each grid; if yes, acquiring additional navigation data of the grid from locally pre-stored additional navigation data of the common geographic area; and if not, acquiring additional navigation data corresponding to the grid from the server side.
2. The navigation method of claim 1, wherein before obtaining the additional navigation data corresponding to the grid from the server, the method further comprises:
and judging whether the grid is the same as the grid of the previous period cached in the cache or not, if so, acquiring the additional navigation data of the grid from the cache, and if not, executing the step of acquiring the additional navigation data corresponding to the grid from the server side.
3. The navigation method of claim 1, after acquiring additional navigation data according to the current location of the user, further comprising:
and erasing the additional navigation data of the grid of the previous period cached in the cache, and caching the additional navigation data of the N grids of the current period.
4. The navigation method according to any one of claims 1 to 3, further comprising:
judging whether the current network meets preset excellent network environment conditions or not;
and if so, acquiring the real-time traffic data of the administrative division where the current position is located from the server side, and rendering the acquired real-time traffic data.
5. A navigation device, comprising:
the receiving module is used for receiving a path planning request carrying a starting point and a terminal point;
the planning module is used for planning a navigation path from a starting point to an end point according to locally stored basic navigation data, wherein the basic navigation data comprises POI (point of interest) data and road data;
the acquisition module is used for acquiring additional navigation data for navigation guidance according to the current position of a user in the process of navigating based on the navigation path;
wherein the acquisition module comprises:
the positioning sub-module is used for positioning the user according to a preset time period in the process of navigating based on the navigation path to obtain the current position of the user;
the grid generation submodule is used for generating N grids by taking the current position of the user as a central point, wherein N is a preset positive integer which is more than or equal to 1;
the first judgment submodule is used for judging whether each grid is contained in a common geographical area preset by the user, if so, the first acquisition submodule is triggered, and if not, the second acquisition submodule is triggered;
the first acquisition submodule is used for acquiring additional navigation data of the grid from locally pre-stored additional navigation data of the common geographic area;
and the second acquisition submodule is used for acquiring the additional navigation data corresponding to the grid from the server side.
6. The navigation device of claim 5, wherein the acquisition module further comprises a third acquisition sub-module, wherein:
the first judgment submodule is further used for judging whether the grid is the same as the grid of the previous period cached in the cache or not before the second acquisition submodule is triggered, if so, triggering a third acquisition submodule, and otherwise, triggering the second acquisition submodule;
and the third acquisition submodule is used for acquiring the additional navigation data of the grid from the cache.
7. The navigation device of claim 5, wherein the device further comprises:
the erasing module is used for erasing the additional navigation data of the grid of the previous period cached in the cache after the acquiring module acquires the additional navigation data for navigation guidance according to the current position of the user;
and the cache module is used for caching the additional navigation data of the N grids in the current period.
8. The navigation device according to any one of claims 5 to 7, further comprising:
the first judgment module is used for judging whether the current network meets the preset excellent network environment condition or not, and if so, the real-time traffic data acquisition module is triggered;
the real-time traffic data acquisition module is used for acquiring real-time traffic data of an administrative division where the current position is located from the server side;
and the rendering module is used for rendering the acquired real-time traffic data.
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| CN201610811454.6A CN107806883B (en) | 2016-09-08 | 2016-09-08 | Navigation method and device |
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| CN201610811454.6A CN107806883B (en) | 2016-09-08 | 2016-09-08 | Navigation method and device |
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| CN107806883B true CN107806883B (en) | 2020-02-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109000662B (en) * | 2018-07-19 | 2019-12-17 | 百度在线网络技术（北京）有限公司 | Navigation method and device |
| CN111046116A (en) * | 2019-07-10 | 2020-04-21 | 广东星舆科技有限公司 | Rapid query and transmission method for geographic space data |
| CN110345964B (en) * | 2019-07-16 | 2021-04-30 | 北京四维图新科技股份有限公司 | Path matching method, device, system and storage medium |
| CN111782754A (en) * | 2020-07-06 | 2020-10-16 | 湖北亿咖通科技有限公司 | Navigation data optimization method of vehicle-mounted information entertainment system |
| CN113377814A (en) * | 2021-06-09 | 2021-09-10 | 北京斯年智驾科技有限公司 | Path information acquisition method and device, electronic equipment and readable medium |
| CN114185908B (en) * | 2021-12-13 | 2024-02-06 | 北京百度网讯科技有限公司 | Map data processing method and device, electronic equipment and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6691128B2 (en) * | 2001-04-19 | 2004-02-10 | Navigation Technologies Corp. | Navigation system with distributed computing architecture |
| JP2005241574A (en) * | 2004-02-27 | 2005-09-08 | Dowango:Kk | System, communication terminal, program and method for guiding route of transportation facility |
| CN101246476A (en) * | 2007-02-15 | 2008-08-20 | 北京腾瑞万里信息技术有限公司 | Map data downloading method, downloading device and server |
| CN103471610B (en) * | 2013-09-24 | 2016-05-25 | 沈阳美行科技有限公司 | A kind ofly support online, the double mode air navigation aid of off-line |
| WO2015195529A1 (en) * | 2014-06-20 | 2015-12-23 | Google Inc. | Integrating online navigation data with cached navigation data during active navigation |
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