CN106595681A - Differential updating method for path data, system and server - Google Patents
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- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
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- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
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Abstract
The invention provides a differential updating method for path data, a system and a server. The method includes: dividing path data into a plurality of path show grid regions according to a road network state; while receiving a navigation path update request of a navigation client, judging a path show grid region to which the path belongs; comparing new version number path data with original version number path data, and recognizing the path show grid region with varying path; acquiring differential data according to the path show grid region with varying path; and sending the differential data to the navigation client to let the navigation client update the navigation path data according to the differential data. Specifically, the differential data is obtained according to the added data record, deleted data record and updated data record of the path show grid region with varying data. According to the invention, the path data updating has no need for update of the whole data packet, only the differential data needs to be updated, and the updated data size is small.
Description
Technical field
The present invention relates to technical field of automobile navigation, the difference update method of specially a kind of path data, system and clothes
Business device.
Background technology
With the development of global positioning system (GlobalPositioning System, abbreviation GPS), will use
The guider of GPS is arranged on the vehicles of the navigation of various needs.The gps antenna of vehicle navigation device terminal is received and
From the data message for representing latitude, longitude etc. of gps satellite transmission, with reference to the electronic chart being stored in vehicle navigation device,
Matched with this by gps satellite signal defined location coordinate, determine accurate location of the navigation object in electronic chart.It
The trip for appearing as people bring many facilities, as long as driver is entered a destination in automobile navigation instrument, system will
Most suitable route is calculated according to built-in electronic chart automatically, and reminds driver to note at any time in vehicle travel process
Stroke.In whole driving process, motorist no at all considers route problem, even in completely strange city, navigation
Instrument also can automatically lead driver's row to set destination.Therefore, based on leading that running fix and wireless Internet technologies are realized
Boat device has become a part indispensable in people's life, is developed by leaps and bounds.
Because communication navigation data includes various cartographic informations, road information, so the data volume of communication navigation data is all
Very big, these substantial amounts of communication navigation datas are often stored on a navigation device when guider is produced, but due to
The navigation datas such as cartographic information, road information often will change after a time, if data cannot update or update
Not in time, then navigation information guided by guider will produce deviation with actual road conditions, so as to the accuracy for affecting to navigate.
For this purpose, real-time and accuracy that path data how is effectively ensured are guider fields expecting the important of solution for a long time
Problem.
For this problem, a solution of prior art is：The path data that service supplier periodically will update
Record after user is paid to valency, is mounted directly the renewal path data on certain storage medium in guider terminal, will
Existing path data is all replaced.However, in reality, what renewal time of service supplier was usually fixed, such as
Half a year or 1 year, it is clear that do not catch up with path data change paces, thus or shortcoming real-time；Also, the data of its storage
Amount is restricted by storage medium, for larger path data, updates cost higher.
The content of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide a kind of difference update of path data
Method, system and server, for solving prior art in path data when updating the data volume that updates it is big, poor real is asked
Topic.
For achieving the above object and his related purpose, the present invention provides a kind of difference update method of path data, described
The method of the difference update of path data includes：Path data is divided into by multiple paths according to road network state and shows grid regions
Domain；When the guidance path for receiving navigation client updates request, judge that the path belonging to path shows net region；Detection
The version number of new path data, the path data of new version number is contrasted with the path data of original version number, recognizes road
The path that footpath changes shows net region；Show that net region obtains difference number according to the path that path changes
According to；The differential data is sent to the navigation client and is led so that the navigation client updates according to the differential data
The path data of boat.
It is described to show that net region obtains difference according to the path that path changes in one embodiment of the invention
Data are specifically included：Show the increase data record of net region, delete data record according to the path that data are changed
Differential data is obtained with record is updated the data.
In one embodiment of the invention, in the differential data：Road shows the boundary line of net region with the path
Place forms global road-net node, and the path of renewal shows that the road of net region boundary is connected by global road-net node,
When the road that the path for updating is shown in net region changes, the connection attribute of global road-net node changes, with the road for updating
Footpath shows that the adjacent path in net region shows that the road in net region is constant.
In one embodiment of the invention, the method for the difference update of the path data also includes：Obtain the difference
The summary info of data simultaneously sends the summary info to the navigation client so that the navigation client is updating road
Show during the data of footpath；Wherein, the summary info includes：The zone number of differential data, the start context of differential data, difference
The description information of data file path, differential data file size and differential data.
For achieving the above object, the present invention also provides a kind of system of the difference update of path data, the path data
The system of difference update include：Network division module is shown, for path data to be divided into into multiple roads according to road network state
Footpath shows net region；Path judge module, during for updating request in the guidance path for receiving navigation client, judges road
Path belonging to footpath shows net region；Identification module, for detecting the version number of new path data, by the road of new version number
Footpath data are contrasted with the path data of original version number, recognize that the path that path changes shows net region；Difference
Data acquisition module, the path for being changed according to path shows that net region obtains differential data；Sending module, uses
Lead so that the navigation client updates according to the differential data in the differential data is sent to the navigation client
The path data of boat.
In one embodiment of the invention, the differential data acquisition module shows according to the path that path changes
The increase data record of net region, delete data record and update the data record and obtain differential data.
In one embodiment of the invention, in the differential data：Road shows the boundary line of net region with the path
Place forms global road-net node, and the path of renewal shows that the road of net region boundary is connected by global road-net node,
When the road that the path for updating is shown in net region changes, the connection attribute of global road-net node changes, with the road for updating
Footpath shows that the adjacent path in net region shows that the road in net region is constant.
In one embodiment of the invention, the system of the difference update of the path data also includes：Summary info module,
For obtaining the summary info of the differential data；Wherein, the summary info includes：The zone number of differential data, difference
The description information of the start context of data, differential data file path, differential data file size and differential data；The transmission
Module sends the summary info to the navigation client so that the navigation client shows when path data is updated.
For achieving the above object, the present invention also provides a kind of server, and the server includes number of path as above
According to difference update system.
For achieving the above object, the present invention also provides a kind of navigation client, the navigation client and above-mentioned service
Device is connected and obtains differential data from the server and updates path data.
As described above, a kind of difference update method of path data of the present invention, system and server, with following beneficial
Effect：
Path data is divided into multiple paths and shows net region by the present invention according to road network state, by the road of new version number
Footpath data are contrasted with the path data of original version number, recognize that the path that path changes shows net region, according to
The path that path changes shows that net region obtains differential data, and the differential data is sent to the navigation client
The path data that navigation is updated according to the differential data for the navigation client is held, so, when path data updates not
Need to update whole packet, be to need to update differential data, the data volume of renewal is little, and real-time is preferable；It is of the invention simple real
With with good market prospects and wide applicability.
Description of the drawings
Fig. 1 is shown as a kind of schematic flow sheet of the method for the difference update of path data of the present invention.
Fig. 2 is shown as a kind of theory diagram of the system of the difference update of path data of the present invention.
Fig. 3 is shown as a kind of preferred theory diagram of the system of the difference update of path data of the present invention.
Component label instructions
The system of the difference update of 100 path datas
101 show network division module
102 path judge modules
103 identification modules
104 differential data acquisition modules
105 sending modules
106 summary info modules
S101～S105 steps
Specific embodiment
Embodiments of the present invention are illustrated below by way of specific instantiation, those skilled in the art can be by this specification
Disclosed content understands easily other advantages and effect of the present invention.The present invention can also pass through concrete realities different in addition
The mode of applying is carried out or applies, the every details in this specification can also based on different viewpoints with application, without departing from
Various modifications and changes are carried out under the spirit of the present invention.
It is an object of the invention to provide a kind of difference update method of path data, system and server, for solving
The data volume updated when path data updates in prior art is big, the problem of poor real.The present invention's described in detail below
The principle and embodiment of the difference update method, system and server of a kind of path data, is not required to those skilled in the art
Creative work is wanted to be appreciated that difference update method, system and the server of a kind of path data of the present invention.
The present embodiment provides a kind of method of the difference update of path data, specifically, as shown in figure 1, the number of path
According to the method for difference update comprise the following steps：
Step S101, is divided into multiple paths and shows net region according to road network state by path data.
Wherein, the road network state includes the closeness of road, the quantity of point of interest, dense degree of building etc., root
Path data is divided into into multiple display grid regions according to the closeness of road, the quantity of point of interest, dense degree of building etc.
Domain shows, wherein, closeness is big, and the quantity of point of interest is more, and the corresponding grid of the intensive grid of building is less, and grid is intensive, close
Intensity is little, and the quantity of point of interest is few, and the corresponding grid of the not intensive grid of building is larger, and grid is sparse, that is to say, that be not
According to existing according to administrative division network, but the size of self-defined display net region, show the big of net region
The little closeness direct proportionality with network state.
Step S101, when the guidance path for receiving navigation client updates request, judges that the path belonging to path shows
Show net region.Wherein, in path data, each described display net region is numbered, can be quick according to path
Navigate to affiliated display net region.
Step S103, detects the version number of new path data, by the path data of new version number and the road of original version number
Footpath data are contrasted, and recognize that the path that path changes shows net region.
In path data, each described display net region is numbered, when the number for having the display net region
During according to being updated, quickly the display net region that data are changed can be found by fixation and recognition.
Step S104, shows that net region obtains differential data according to the path that path changes.
In the present embodiment, it is concrete that the path changed according to path shows that net region obtains differential data
Including：According to the path that data are changed the increase data record of net region is shown, data record is deleted and updates number
Differential data is obtained according to record.
Wherein, in the present embodiment, in the differential data：Road shows shape at the boundary line of net region with the path
Into global road-net node, the path of renewal shows that the road of net region boundary is connected by global road-net node, when more
When new path shows that the road in net region changes, the connection attribute of global road-net node changes, and shows with the path for updating
Show that the adjacent path in net region shows that the road in net region is constant.
Step S105, the differential data is sent to the navigation client so that the navigation client is according to described
Differential data updates the path data of navigation.So, whole packet need not be updated when path data updates, it is only necessary to update
Differential data, the data volume of renewal is little, and real-time is preferable.
Additionally, in the present embodiment, the method for the difference update of the path data also includes：Obtain the differential data
Summary info and by the summary info send to the navigation client for the navigation client update number of path
According to when show；Wherein, the summary info includes：The zone number of differential data, the start context of differential data, differential data
The description information of file path, differential data file size and differential data.By the summary info, navigation client is more
Before new route data, it is known that the situation of the data for updating, improves the user experience that data update.
A kind of method to realize the difference update of above-mentioned path data, as shown in Fig. 2 the present embodiment also provides number of path
According to difference update system 100, the system 100 of the difference update of the path data includes：Show network division module
101, path judge module 102, identification module 103, differential data acquisition module 104 and sending module 105.
In the present embodiment, the display network division module 101 is used to be divided into path data according to road network state
Multiple paths show net region.
Wherein, the road network state includes the closeness of road, the quantity of point of interest, dense degree of building etc., root
Path data is divided into into multiple display grid regions according to the closeness of road, the quantity of point of interest, dense degree of building etc.
Domain shows, wherein, closeness is big, and the quantity of point of interest is more, and the corresponding grid of the intensive grid of building is less, and grid is intensive, close
Intensity is little, and the quantity of point of interest is few, and the corresponding grid of the not intensive grid of building is larger, and grid is sparse, that is to say, that be not
According to existing according to administrative division network, but the size of self-defined display net region, show the big of net region
The little closeness direct proportionality with network state.
In the present embodiment, the path judge module 102 is used to be updated in the guidance path for receiving navigation client
During request, judge that the path belonging to path shows net region.
Wherein, in path data, each described display net region is numbered, can be quickly positioned according to path
To affiliated display net region.
In the present embodiment, the identification module 103 is used to detect the version number of new path data, by new version number
Path data is contrasted with the path data of original version number, recognizes that the path that path changes shows net region.
In path data, each described display net region is numbered, when the number for having the display net region
During according to being updated, quickly the display net region that data are changed can be found by fixation and recognition.
In the present embodiment, the path that the differential data acquisition module 104 is used to be changed according to path shows
Net region obtains differential data.
Specifically, in the present embodiment, the differential data acquisition module 104 shows according to the path that path changes
Show the increase data record of net region, delete data record and update the data record and obtain differential data.
Wherein, in the present embodiment, in the differential data：Road shows shape at the boundary line of net region with the path
Into global road-net node, the path of renewal shows that the road of net region boundary is connected by global road-net node, when more
When new path shows that the road in net region changes, the connection attribute of global road-net node changes, and shows with the path for updating
Show that the adjacent path in net region shows that the road in net region is constant.
In the present embodiment, the sending module 105 be used for by the differential data send to the navigation client with
The path data of navigation is updated according to the differential data for the navigation client.So, need not when path data updates
Update whole packet, it is only necessary to update differential data, the data volume of renewal is little, and real-time is preferable.
Additionally, in the present embodiment, as shown in figure 3, the system 100 of the difference update of the path data also includes：Generally
Information module 106 is wanted, for obtaining the summary info of the differential data.
Wherein, the summary info includes：The zone number of differential data, the start context of differential data, differential data
The description information of file path, differential data file size and differential data；The sending module 105 sends out the summary info
The navigation client is delivered to so that the navigation client shows when path data is updated.By the summary info, lead
Boat client is before path data is updated, it is known that the situation of the data for updating, improves the user experience that data update.
The present embodiment also provides a kind of server, and the server includes the difference update of path data as above
System 100.It is above-mentioned that the system 100 of the difference update of the path data has been described in detail, will not be described here.
The present embodiment also provides a kind of navigation client, and the navigation client is connected and from described with above-mentioned server
Server obtains differential data and updates path data.The navigation client is updated the road of display according to the differential data
Footpath data, the data volume of renewal is little, and real-time is preferable.
In sum, path data is divided into multiple paths and shows net region by the present invention according to road network state, will be new
The path data of version number is contrasted with the path data of original version number, recognizes that the path that path changes shows grid
Region, shows that net region obtains differential data according to the path that path changes, and the differential data is sent to institute
The path data that navigation client is stated so that the navigation client updates navigation according to the differential data, so, number of path
Whole packet need not be updated according to when updating, is to need to update differential data, the data volume of renewal is little, and real-time is preferable；This
Invention is simple and practical, with good market prospects and wide applicability.So, the present invention is effectively overcome in prior art
Various shortcoming and have high industrial utilization.
The principle and effect of above-described embodiment only illustrative present invention, it is of the invention not for limiting.It is any to be familiar with
The personage of this technology all can carry out modifications and changes under the spirit and the scope without prejudice to the present invention to above-described embodiment.Therefore,
Such as those of ordinary skill in the art is completed under without departing from disclosed spirit and technological thought
All equivalent modifications or change, should by the present invention claim be covered.
Claims (10)
1. a kind of method of the difference update of path data, it is characterised in that the method bag of the difference update of the path data
Include：
Path data is divided into by multiple paths according to road network state and shows net region；
When the guidance path for receiving navigation client updates request, judge that the path belonging to path shows net region；
The version number of the new path data of detection, it is right that the path data of new version number and the path data of original version number are carried out
Than recognizing that the path that path changes shows net region；
Show that net region obtains differential data according to the path that path changes；
The differential data is sent to the navigation client so that the navigation client updates according to the differential data
The path data of navigation.
2. the method for the difference update of path data according to claim 1, it is characterised in that described that change is had according to path
The path changed shows that net region obtains differential data and specifically includes：Grid is shown according to the path that data are changed
The increase data record in region, delete data record and update the data record and obtain differential data.
3. the method for the difference update of path data according to claim 1 and 2, it is characterised in that the differential data
In：Road shows with the path and formed at the boundary line of net region global road-net node, and the path of renewal shows net region
The road of boundary is connected by global road-net node, when the road that the path for updating is shown in net region changes, entirely
The connection attribute of office's road-net node changes, and shows that the adjacent path in net region shows the road in net region with the path for updating
Road is constant.
4. the method for the difference update of path data according to claim 1, it is characterised in that the difference of the path data
The method for updating is divided also to include：Obtain the summary info of the differential data and the summary info is sent to the navigation visitor
Family end shows for the navigation client when path data is updated；Wherein, the summary info includes：The area of differential data
Field Number, the start context of differential data, differential data file path, the description letter of differential data file size and differential data
Breath.
5. a kind of system of the difference update of path data, it is characterised in that the system bag of the difference update of the path data
Include：
Network division module is shown, for path data to be divided into into multiple paths according to road network state net region is shown；
Path judge module, during for updating request in the guidance path for receiving navigation client, judges the road belonging to path
Footpath shows net region；
Identification module, for detecting the version number of new path data, by the path data of new version number and the road of original version number
Footpath data are contrasted, and recognize that the path that path changes shows net region；
Differential data acquisition module, the path for being changed according to path shows that net region obtains differential data；
Sending module, for the differential data to be sent to the navigation client so that the navigation client is according to described
Differential data updates the path data of navigation.
6. the system of the difference update of path data according to claim 5, it is characterised in that the differential data is obtained
Module shows the increase data record of net region according to the path that path changes, deletes data record and update the data
Record obtains differential data.
7. the system of the difference update of the path data according to claim 5 or 6, it is characterised in that the differential data
In：Road shows with the path and formed at the boundary line of net region global road-net node, and the path of renewal shows net region
The road of boundary is connected by global road-net node, when the road that the path for updating is shown in net region changes, entirely
The connection attribute of office's road-net node changes, and shows that the adjacent path in net region shows the road in net region with the path for updating
Road is constant.
8. the system of the difference update of path data according to claim 5, it is characterised in that the difference of the path data
The system for updating is divided also to include：Summary info module, for obtaining the summary info of the differential data；Wherein, the summary
Information includes：The zone number of differential data, the start context of differential data, differential data file path, differential data file
The description information of size and differential data；The sending module sends the summary info to the navigation client for institute
State navigation client to show when path data is updated.
9. a kind of server, it is characterised in that the server is included if claim 5 is to claim 8 any claim
The system of the difference update of described path data.
10. a kind of navigation client, it is characterised in that the navigation client be connected with the server in claim 9 and from
The server obtains differential data and updates path data.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107192392A (en) * | 2017-05-26 | 2017-09-22 | 山东浪潮云服务信息科技有限公司 | The update method and device of a kind of road net data |
| CN107423099A (en) * | 2017-07-31 | 2017-12-01 | 京东方科技集团股份有限公司 | Key programming method, server, terminal, key programming system and storage medium |
| CN107451526A (en) * | 2017-06-09 | 2017-12-08 | 蔚来汽车有限公司 | The structure of map and its application |
| CN108874344A (en) * | 2018-06-15 | 2018-11-23 | 深圳市轱辘汽车维修技术有限公司 | A kind of method for refreshing data, terminal device and computer-readable medium |
| CN110827286A (en) * | 2018-08-08 | 2020-02-21 | 菜鸟智能物流控股有限公司 | Geographic region segmentation method and device based on road network and electronic equipment |
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