CN101354262B - Method and system for downloading data based on navigation system - Google Patents
Method and system for downloading data based on navigation system Download PDFInfo
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- CN101354262B CN101354262B CN 200710119658 CN200710119658A CN101354262B CN 101354262 B CN101354262 B CN 101354262B CN 200710119658 CN200710119658 CN 200710119658 CN 200710119658 A CN200710119658 A CN 200710119658A CN 101354262 B CN101354262 B CN 101354262B
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Abstract
The invention discloses a data downloading method based on a navigation system, which comprises the steps: a predicted route is generated according to the present position of a user; a geographic data block conforming with a preset rule is determined according to the predicted route; the geographic data block is downloaded. In the invention, by determining the geographic data block conforming with the preset rule and carrying out preload-processing on the geographic data block, the navigation course has better instantaneity, and no pause or blockage caused by waiting for data download, thereby effectively improving the response speed of the communication navigation and offering better application experience to users.
Description
Technical field
The present invention relates to the Geographic Navigation field, particularly a kind of data download method and a kind of data downloading system based on navigational system based on navigational system.
Background technology
Along with the development of city traffic network and the raising of living standards of the people, the Geographic Navigation system that realizes based on running fix and wireless interconnected network technology has become an indispensable part in people's life.
In navigation procedure; Restriction owing to multiple conditions such as hardware condition that receives navigator and wireless Internets; Data download method comparatively commonly used at present is in navigation procedure, according to the position at the current place of user, downloads the geodata piece of position in real time.Yet; Because the limited bandwidth of wireless communication networks, this process of downloading need expend the regular hour usually, thereby causes the pause of navigation procedure; And geodata piece that need to wait for the current position of user all download finish after; Just can continue as the user navigation Service is provided, make the navigation reaction of navigational system slack-off, can not the user be provided in time information needed.
So those skilled in the art press for develops a kind of data download method and download system based on navigational system that can effectively improve the navigation reaction velocity.
Summary of the invention
Technical matters to be solved by this invention provides a kind of data download method based on navigational system, reacts problem slow, poor user experience in order to solve to navigate in the prior art.
The present invention also provides a kind of data downloading system based on navigational system, in order to guarantee realization and the application of said method in reality.
For solving the problems of the technologies described above, the embodiment of the invention discloses a kind of data download method based on navigational system, comprising:
Current location information generation forecast circuit based on the user; Said generation forecast circuit comprises: extraction meets a plurality of positional informations that preset requirement; Obtain user's road information; Obtaining the directional information of location, serves as the starting point of prediction circuit with user's current position information, generates the prediction circuit with said road information and directional information;
Confirm to meet the geodata piece of presetting rule according to said prediction circuit; The step of said definite geodata piece comprises: the current location information with the user is the initiation feature location point; Size selected further feature location point in said prediction circuit according to geographical data block obtains the corresponding geodata piece of said initiation feature location point and said further feature location point;
Download said geodata piece.
Preferably, described method also comprises:
Navigation circuit is preset in acquisition;
Whether the current location information of judging said user is present in the said navigation circuit, if then carry out the step of said generation forecast circuit; If, then do not regain navigation circuit.
Preferably, described method also comprises:
Obtain the signature identification of said geodata piece, and said signature identification is added into presets in the download list; Said download step is: download geodata piece corresponding with said signature identification in the said download list successively.
Preferably, described method also comprises:
Said geodata piece is saved to this locality.
The embodiment of the invention also discloses a kind of data downloading system, comprising based on navigational system:
Generation module: be used for current location information generation forecast circuit based on the user; Said generation forecast circuit comprises: extraction meets a plurality of positional informations that preset requirement; Obtain user's road information; Obtaining the directional information of location, serves as the starting point of prediction circuit with user's current position information, generates the prediction circuit with said road information and directional information;
Determination module: the geodata piece that is used for confirming to meet presetting rule according to said prediction circuit; Said determination module comprises: feature locations clicks cell: the current location information that is used for the user is the initiation feature location point; According to size selected further feature location point in said prediction circuit of geographical data block, extraction unit: be used to obtain the corresponding geodata piece of said feature locations point;
Download module: be used to download said geodata piece.
Preferably, described system also comprises:
Obtain module: be used for obtaining to preset navigation circuit;
Judge module: be used for judging whether said user's current location information is present in said navigation circuit, if then trigger the current location information generation forecast circuit of generation module based on the user; Regain navigation circuit if, then do not trigger the acquisition module.
Preferably, said generation module comprises:
Road information obtains the unit: be used to extract and meet a plurality of positional informations that preset requirement, obtain user's road information;
Directional information obtains the unit: be used to the directional information that obtains to locate;
Processing unit: being used for user's current position information is the starting point of prediction circuit, generates the prediction circuit with said road information and directional information.
Preferably, described system also comprises:
Acquisition module: the signature identification that is used to obtain said geodata piece;
Add module: be used for said signature identification is added into and preset download list.
Compared with prior art, the embodiment of the invention has the following advantages:
The present invention is through confirming to meet the geodata piece of presetting rule; And these geodata pieces are carried out preparatory download process; Make navigation procedure have more real-time; Can not take place to pause or block, effectively improve the reaction velocity of communication navigation, make the user obtain better experience because of waiting pending data to download.
Description of drawings
Fig. 1 is the process flow diagram of a kind of data download method embodiment 1 based on navigational system of the present invention;
Fig. 2 is the process flow diagram of a kind of data download method embodiment 2 based on navigational system of the present invention;
Fig. 3 is the process flow diagram of a kind of data download method embodiment 3 based on navigational system of the present invention;
Fig. 4 is the process flow diagram of a kind of data download method embodiment 4 based on navigational system of the present invention;
Fig. 5 uses a kind of method embodiment of the present invention to carry out navigation circuit B and the synoptic diagram of predicting circuit L in the preparatory downloading process of data;
Fig. 6 is the structured flowchart of a kind of data downloading system embodiment 1 based on navigational system of the present invention;
Fig. 7 is the structured flowchart of a kind of data downloading system embodiment 2 based on navigational system of the present invention;
Fig. 8 is the structured flowchart of a kind of data downloading system embodiment 3 based on navigational system of the present invention;
Fig. 9 uses system shown in Figure 8 to carry out the method flow diagram that data are downloaded in advance.
Embodiment
For make above-mentioned purpose of the present invention, feature and advantage can be more obviously understandable, below in conjunction with accompanying drawing and embodiment the present invention done further detailed explanation.
One of core idea of the embodiment of the invention is; Vehicle line through predictive user; Download the corresponding geodata piece of this circuit in advance, thereby make navigation procedure have more real-time, can not pause or block because of waiting the pending data download and taking place; Improve the reaction velocity of communication navigation, make the user obtain better experience.
With reference to Fig. 1, show the process flow diagram of a kind of data download method embodiment 1 based on navigational system of the present invention, specifically may further comprise the steps:
Be well known that navigational system generally includes following key factor:
Factor one, satellite-signal:
Navigational system need rely on GPS (GPS) to confirm user position information.The most basic, GPS can know the longitude and the latitude of user position.Under special circumstances, GPS can also know the sea level elevation of user position.
Factor two, signal receive:
The principle of work of GPS is to resolve the signal that receives from synchronous satellite there.Be projected on the vertical plane, these signals can be expressed as the infundibulate of falling one by one visually.When the latter half of these " funnels " has necessarily when overlapping, the analysis program of GPS just can calculate the positional information of user position.For example, in the process of running car, a gyrostatic device that is similar to aircraft or steamer navigation usefulness can provide the position of automobile continuously.When satellite-signal was interrupted to some extent, the data that speed counter provided can be used for filling up blank wherein, and were used for putting down in writing running time.
Factor three, signal Processing:
The information that signal and speed counting device provided that GPS receives will be passed through receiver, offers navigational system, and is handled by software system analysis, is superimposed upon on the map of storage.
Factor four, geographical data bank:
Geographical data bank belongs to spatial database; The data of expression geographical entity and characteristic thereof have definite volume coordinate; For geodata provides standard format, memory method and effectively management; Can make things convenient for, promptly retrieve, upgrade and analyze, make the data of being organized reach the minimum requirement of redundance, be multiple application purpose service.For example, when coordinate information that GPS provides was added on the electronic chart, the user just can obtain own current position information.
Thereby in reality, can rely on GPS to obtain user position information and directional information, i.e. generally speaking longitude, latitude and user's travel direction, or in some longitude, latitude, sea level elevation and user's travel direction in particular cases.Current location information and the directional information that GPS can be as required obtain the user in real time or regularly line item of going forward side by side.
Preferably, the embodiment of the invention can generate the prediction circuit to this user through following substep:
Substep A1, extraction meet a plurality of positional informations that preset requirement, obtain user's road information;
For example, extraction GPS record apart from the positional information of 5 to 10 the shortest location points of current time interval; Mate in the road data in geographical data bank; Whether said coupling can be embodied on one or more straight line of expression road for judging above-mentioned location point, in reality, because road has certain width; Thereby corresponding judgment possibly be to judge that said a plurality of location point is whether in the polygon of an expression road; In order to obtain corresponding road information, said road information possibly comprise a road information, also possibly be made up of many road informations.In addition, those skilled in the art also can adopt other method of the prior art to obtain user's road information, and the present invention does not limit this.
The directional information of substep A2, acquisition location;
Substep A3, serve as the starting point of prediction circuit, generate prediction circuit with said road information and directional information with user's current position information.
Begin from user's current location; Along directional information and road information, can obtain prediction circuit, in embodiments of the present invention to this user; Said prediction circuit can be generated arbitrarily by those skilled in the art as required; For example, be the starting point of prediction circuit with the current location, the terminal point that belongs to road with current location is the terminal point of prediction circuit; Perhaps, be the starting point of prediction circuit with the current location, with the terminal point of presetting navigation circuit the terminal point of prediction circuit; Perhaps; Is the starting point of prediction circuit with the current location, the terminal point of prediction circuit is not set, and according to user's road information and directional information; The location meets the geodata piece of presetting rule in down-stream of the present invention; For reducing system burden, improve system handles efficient, the last this mode of embodiment of the invention advantageous applications realizes.
Certainly, it all is feasible that those skilled in the art adopt any method to generate said prediction circuit, and the present invention need not limit this.
Preferably, in embodiments of the present invention, the step of said definite geodata piece can comprise following substep:
Substep B1, be the initiation feature location point with user's current location information, according to size selected further feature location point in said prediction circuit of geographical data block;
Substep B2, obtain the corresponding geodata piece of said feature locations point.
The topological relation that geodata can reduce three kinds of geometry entities of point, line, surface and describe space relationship between them.Three kinds of geographical geometry entities of point, line, surface, topological relation combination, arrangement according to certain just can form more complicated geographical geometry entity.For example, point, line are combined to form network; Line, face are combined to form the area; Point, face are combined to form areal type; Point, line, surface are combined to form geographic region.Geodata generally includes attribute data, and attribute data is mainly used in relevant attributive character such as describing geographical entity, geographic element, geographical phenomenon, geographic event, geographical process.Particularly; Geodata in the navigational system comprises basic geographic information data, has the network of communication lines data of topological relation, has POI (Point Of Interest, the point of interest) data of various different attribute information and other auxiliary data that navigation procedure is produced.In reality, said basic geographic information data can be the map of having completed, with grid or vector file stored in form.
Do not handle if the geodata of navigational system is carried out piecemeal, so in embodiments of the present invention, need in advance storage geodata in the navigational system to be carried out piecemeal and handle, for its block division method, the present invention does not limit.Certainly, for the geodata that has realized the piecemeal storage in the prior art, then the embodiment of the invention can directly be called or download it, does not need to carry out piecemeal again and handles.
Preferably, the size of the geodata piece after the said cutting is fixed, and the geographic range of every geodata piece representative is relevant with its residing display level (being the displaying ratio chi).In reality; Correlativity for the geographic range display level residing (being the displaying ratio chi) that embody geodata piece representative with it; Can be that title is stored with the positional information and the class information of said geodata piece; For example, said geodata piece is named with the mode of x-y-level, and be stored in the navigational system.Wherein, x and y are the pairing coordinate positions of geodata piece, and level is the display level of geodata piece.
Use the geodata piece of present embodiment in reality definite process can for; At first extract the geodata piece at current point place; Then along the prediction route; Size according to geographical data block moves to next feature locations point successively, extracts this feature locations then and puts pairing geodata piece, so confirms n geodata piece; Perhaps, at first determine all feature locations points, extract all corresponding geodata pieces according to these feature locations points then according to current point; The number of said geodata piece can be by those skilled in the art as required or the experience setting, and the present invention does not limit this.
Data ground is a large amount of to be downloaded in order to avoid, and causes data redundancy, and preferably, the number of said geodata piece can be calculated through following formula and confirm:
n=[t×s÷d]；
Wherein, t is the interval time of presetting, and s is user's a travel speed, and d is the size of geodata piece, need to prove, said d is meant the size of geodata piece on geographical space, rather than the file size of geodata piece.Obviously, fully take into account these objective factors in the present embodiment, can make the data downloaded amount enough guarantee the fluency of navigation procedure, download, thereby effectively guaranteed the navigation reaction velocity of navigational system and be unlikely to redundant.
Below confirm that to use present embodiment a kind of method of geodata piece is that example is elaborated in reality.
If the current coordinate of user position be (p, q), the mesh coordinate (x of itself and geodata piece; Y) corresponding relation be (x, y)=f (p, q); At first obtain the current display level level of the display terminal of navigational system, obtain under current display level, the geographic range of a geodata piece representative; The display terminal of said navigational system; Can be contained on the pilot dial plate of automobile, also can project on the screen of laptop computer even palmtop computer, the difference of all right various navigational system shows application terminal etc.
If the size of geodata piece is d; Current location information with the user is the initiation feature location point; At first extract the pairing data block of this initiation feature location point, along the prediction circuit, move to next feature locations point successively then according to the big or small d of geographical data block; Extract this feature locations then and put pairing geodata piece, so extract n geodata piece.The computing method of said n are n=[t * s ÷ d], and wherein, t is the interval time of presetting, and s is user's a travel speed, and d is the size of geodata piece.And, being the integrality that guarantees that geodata is downloaded, said n is preferably more than or equals 1 integer, can make corresponding geodata piece cover the buffer zone of whole prediction route, makes the geodata piece have continuity, does not promptly have the crack between the piecemeal.Wherein, Said buffer zone can be the belt-like zone that forms behind the line of prediction road direction both sides expansion certain distance; Its radius can be decided according to the displaying ratio chi, and purpose is to guarantee that data downloaded can intactly fill user's display terminal, lets the user can see the peripheral information of circuit simultaneously.
Certainly, the method for above-mentioned definite geodata piece only is used for for example, those skilled in the art according to actual needs or the experience geodata piece that adopts any method to confirm to meet presetting rule voluntarily all be feasible, the present invention need not limit this.
In reality, can said downloading geographical data piece directly be saved to this locality, said this locality can be local cache, also can be the storage unit of navigation terminal, can also be other memory device, the present invention does not limit this.In this case, before carrying out down operation, can check at first that whether this geodata piece is Already in local, if exist, then do not download this geodata piece, and continues to download next piece geodata piece; If do not exist, then this geodata piece is kept at this locality.In the present embodiment, it all is feasible that those skilled in the art adopt the method for any download, and the present invention need not limit this.
One of another core idea of the present invention is; When carrying out the data download; Use an ordered list to manage these geodata pieces to be downloaded, according to geodata piece to be downloaded to the distance of the geodata piece of user's current location as sort by, the near geodata piece of distance is downloaded earlier; Download behind the geodata piece of distance, to guarantee the smoothness of navigation procedure.
With reference to Fig. 2, show the process flow diagram of a kind of data download method embodiment 2 based on navigational system of the present invention, specifically may further comprise the steps:
Said signature identification can obtain arbitrarily based on the different geographic data block, and for example, the name of obtaining said geodata piece is called signature identification.Suppose that geographical data block names with the mode of x-y-level; Wherein, x and y are the pairing coordinate positions of geodata piece, and level is the display level of geodata piece; All can be the signature identification of geodata piece such as 2-2-4,3-2-4,4-2-4,4-2-4,5-3-4,6-3-4 etc.; Because in reality, has certain naming rule usually for the name of geodata piece, in this case; Then can download the corresponding geographical data block successively according to the ordinal relation that said signature identification embodied.
The method that the application present embodiment is downloaded comprises multiple; For example; Be added into successively by little signature identification according to distance and preset in the download list to senior general's corresponding geographical data block with the pairing geodata piece of user's current location; The order of adding according to signature identification then, is downloaded corresponding geodata piece successively; Perhaps; According to the distance of the pairing geodata piece of user's current location by little to greatly to corresponding geographical data block record number or other sequence identification; And be added into and preset in the tabulation; Download corresponding geodata piece etc. successively according to the order information of this numbering or other sequence identification then, the present invention does not limit this.Certainly, it all is feasible that those skilled in the art adopt the method for any download, and the present invention need not limit this.
Preferably, present embodiment can also comprise step: said geodata piece is saved to this locality.In this case, before carrying out down operation, can check at first that whether this geodata piece is Already in local, if exist, then do not download this geodata piece, and continues to download next piece geodata piece; If do not exist, then this geodata piece is kept at this locality.
One of another core idea of the present invention is; According to user's directional information and road information; The navigation circuit that cooperates navigation server to generate; Realization is carried out preparatory download policy to the geodata in the scope of prediction circuit both sides certain distance then to the prediction of user's course, accelerates the reaction velocity of navigational system.
With reference to Fig. 3, show the process flow diagram of a kind of data download method embodiment 3 based on navigational system of the present invention, specifically may further comprise the steps:
Navigation circuit is preset in step 301, acquisition;
Present embodiment has proposed the implementation that the present invention and prior art effectively combine.In navigation; According to the starting point and the terminal point of user preset, navigation server can generate navigation circuit, and this bar navigation circuit normally comprises preset starting point best vehicle line to terminal; Existing road data is complementary in this circuit and the system, corresponding one or more road.The formation principle of this navigation circuit does; Judge between starting point and terminal point whether be communicated with; Whether distance is the shortest, and then other gets restrictive condition to add some, for example road conditions etc.; Give certain weight for corresponding road these conditions, the circuit that the cost that calculates is minimum offers the user as navigation circuit.
Present embodiment is applied in the reality, preferably, accomplishes navigation data by navigation terminal and download in advance; In carrying out preparatory downloading process, the navigation circuit that navigation terminal presets from the navigation server acquisition earlier is in order to cooperate the generation of prediction circuit; (driftage is meant in the communication navigation process when driftage takes place; Situation when the guidance path of actual course of user and navigation system computes departs from), navigation terminal navigation server sends the request of recomputating of navigation circuit, and navigation server recomputates navigation circuit according to described request; Redispatch to navigation terminal, thereby make navigation terminal regain new navigation circuit.More than just the preparation method of a kind of navigation circuit of prior art is illustrated, it all is feasible that those skilled in the art adopt any method to obtain said navigation circuit, and the present invention need not limit this.
In reality; A kind of the method whether current location information of judging said user is present in said navigation circuit does; Whether the road at the current place of judges matees certain the bar road in the navigation circuit, and particularly, the ID sequence that can whether have navigation circuit through the ID of the current place of checking user road is (because navigation circuit possibly be made up of one or more road; The former sequence that possibly form a road ID) judges in; If, the expression navigation circuit is correct, then based on user's current location information generation forecast circuit; If do not exist, represent that then driftage has taken place the user, then recomputate navigation circuit, regeneration prediction circuit.And above-mentioned those skilled in the art can set up the corresponding judgment method on their own fully as required for the explaining all only for illustrative embodiment 3 of determination methods, and the present invention does not limit this.
In the present embodiment, for reducing system burden, improve system handles efficient, said data process of downloading can be for automatically performing once at regular intervals, and the said time interval is preferably the half the of aforementioned download interval time t, i.e. t/2.Through regularly user's travel condition being monitored, can know whether the user goes off course.In reality; In case receive the information that is not inconsistent of user's current location information and navigation circuit, can use the present invention and will preset geodata block message deletion to be downloaded in the download list, and trigger navigational system and recomputate guidance path; Again course is predicted; Promptly position and the time with the current place of user is starting point, carries out correlation step of the present invention again, accomplishes the preparatory down operation of data.
Can find out,, can shift to an earlier date data download through using method embodiment provided by the present invention; Make navigation procedure have more real-time; And can be because of not waiting pending data cause clogging, thereby improved the reaction velocity of communication navigation, make the user can obtain better experience.
With reference to figure 4, show the process flow diagram of a kind of data download method embodiment 4 based on navigational system of the present invention, specifically may further comprise the steps:
Navigation circuit is preset in step 402, acquisition;
The directional information of step 404, acquisition location;
In the present embodiment, preferably, the step of said definite geodata piece can comprise following substep:
Substep Q1, be the initiation feature location point with user's current location information, according to size selected further feature location point in said prediction circuit of geographical data block;
Substep Q2, obtain the corresponding geodata piece of said feature locations point.
Preferably, present embodiment can also may further comprise the steps:
Obtain the signature identification of said geodata piece, and said signature identification is added into presets in the download list.
In this case, said download step is: download geodata piece corresponding with said signature identification in the said download list successively.
Preferably, present embodiment can also may further comprise the steps:
Said geodata piece is saved to this locality.
Present embodiment is the more concrete a kind of embodiment that combines with prior art.
For aforesaid each method embodiment; For simple description; So it all is expressed as a series of combination of actions, but those skilled in the art should know that the present invention does not receive the restriction of described sequence of movement; Because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in the instructions all belongs to preferred embodiment, and related action and module might not be that the present invention is necessary.
In addition; In said method embodiment, the description of each embodiment is all emphasized particularly on different fields, each embodiment stresses all is the difference with other embodiment; Do not have the part of detailed description among certain embodiment, can get final product referring to the associated description of other embodiment.
It is to be noted; Those skilled in the art are easy to expect: it all is feasible that said method embodiment 1-embodiment 4 combination in any are used; So the combination in any between the said method embodiment 1-embodiment 4 all is embodiment of the present invention; But this instructions has not just detailed at this one by one as space is limited.
For making those skilled in the art understand the present invention better, below to carry out the preparatory process of downloading of data be that example describes in reality, to use a kind of embodiment of the present invention.
With reference to figure 5, the current location of establishing the user is the A point, and the preparatory process of downloading of data is:
1, obtains the navigation circuit that presets, shown in lines B;
2, through GPS location, confirm the coordinate position that A orders (p, q);
3, from the GPS record, take out the positional information of preceding 5 location, calculate the road at these some places, obtain user's road information;
4, confirm that the ID that the user belongs to road is present in the ID sequence of navigation circuit;
5, the directional information of confirming the user through GPS location is for going eastwards;
6, the road information and the directional information generation forecast circuit L that obtain according to step 4 and step 5;
7, according to calculating formula (x, y)=(p q) obtains the pairing geodata piece of current location mesh coordinate for (2,2) to f, and suppose to get access to current display level is 4, and then definite pairing geodata piece of current location is 2-2-4;
8, according to calculating formula n=[t * s ÷ d], supposing to calculate needs to download 6 blocks of data, to satisfy the demonstration needs of t in the time, then, confirms that the geodata piece that needs to download in advance is: 2-2-4,3-2-4,4-2-4,5-2-4,5-3-4 and 6-3-4;
9, these geodata pieces are numbered, and be added into successively and preset in the download list;
10, download corresponding geodata piece in order according to said numbering.
With reference to figure 6, show the structured flowchart of a kind of data downloading system embodiment 1 based on navigational system of the present invention, specifically comprise with lower module:
Generation module 601: be used for current location information generation forecast circuit based on the user;
Determination module 602: the geodata piece that is used for confirming to meet presetting rule according to said prediction circuit;
Download module 603: be used to download said geodata piece.
Preferably, in the present embodiment, said generation module comprises with lower unit:
Road information obtains the unit: be used to extract and meet a plurality of positional informations that preset requirement, obtain user's road information;
Directional information obtains the unit: be used to the directional information that obtains to locate;
Processing unit: being used for user's current position information is the starting point of prediction circuit, generates the prediction circuit with said road information and directional information.
Preferably, in the present embodiment, said determination module comprises with lower unit:
Feature locations clicks cell: the current location information that is used for the user is the initiation feature location point, according to size selected further feature location point in said prediction circuit of geographical data block;
Extraction unit: be used to obtain the corresponding geodata piece of said feature locations point.
With reference to figure 7, show the structured flowchart of a kind of data downloading system embodiment 2 based on navigational system of the present invention, specifically comprise with lower module:
Obtain module 701: be used for obtaining to preset navigation circuit;
Judge module 702: be used for judging whether said user's current location information is present in said navigation circuit, if then trigger the current location information generation forecast circuit of generation module 703 based on the user; Regain navigation circuit if, then do not trigger acquisition module 701.
Generation module 703: be used for current location information generation forecast circuit based on the user;
Preferably, in the present embodiment, said generation module comprises with lower unit:
Road information obtains the unit: be used to extract and meet a plurality of positional informations that preset requirement, obtain user's road information;
Directional information obtains the unit: be used to the directional information that obtains to locate;
Processing unit: being used for user's current position information is the starting point of prediction circuit, generates the prediction circuit with said road information and directional information.
Determination module 704: the geodata piece that is used for confirming to meet presetting rule according to said prediction circuit;
Preferably, in the present embodiment, said determination module comprises with lower unit:
Feature locations clicks cell: the current location information that is used for the user is the initiation feature location point, according to size selected further feature location point in said prediction circuit of geographical data block;
Extraction unit: be used to obtain the corresponding geodata piece of said feature locations point.
Download module 705: be used to download said geodata piece.
With reference to figure 8, show the structured flowchart of a kind of data downloading system embodiment 3 based on navigational system of the present invention, specifically comprise with lower module:
Obtain module 801: be used for obtaining to preset navigation circuit;
Judge module 802: be used for judging whether said user's current location information is present in said navigation circuit, if then trigger the current location information generation forecast circuit of generation module 803 based on the user; If, then do not trigger computing module 801 and recomputate navigation circuit.
Generation module 803: be used for current location information generation forecast circuit based on the user;
Preferably, in the present embodiment, said generation module comprises with lower unit:
Road information obtains the unit: be used to extract and meet a plurality of positional informations that preset requirement, obtain user's road information;
Directional information obtains the unit: be used to the directional information that obtains to locate;
Processing unit: being used for user's current position information is the starting point of prediction circuit, generates the prediction circuit with said road information and directional information.
Determination module 804: the geodata piece that is used for confirming to meet presetting rule according to said prediction circuit;
Preferably, in the present embodiment, said determination module comprises with lower unit:
Feature locations clicks cell: the current location information that is used for the user is the initiation feature location point, according to size selected further feature location point in said prediction circuit of geographical data block;
Extraction unit: be used to obtain the corresponding geodata piece of said feature locations point.
Acquisition module 805: the signature identification that is used to obtain said geodata piece;
Add module 806: be used for said signature identification is added into and preset download list
Download module 807: be used to download said geodata piece.
Preferably, said download is for download geodata piece corresponding with said signature identification in the said download list successively.
With reference to figure 9, show and use the method flow diagram that system shown in Figure 8 carries out the preparatory download of data, specifically may further comprise the steps:
Step 901, acquisition module obtain to preset navigation circuit;
Step 902, road information obtain the unit extraction and meet a plurality of positional informations that preset requirement, obtain user's road information;
Step 903, judge module judge whether said user's road information is present in the said navigation circuit, if then carry out next step; If then execution in step 901, regain navigation circuit not;
Extraction meets the step 904, the directional information that preset requirement and obtains the directional information that the unit obtains the location;
Step 905, processing unit serve as the starting point of prediction circuit with user's current position information, generate the prediction circuit with said road information and directional information;
It is the initiation feature location point with user's current location information that step 906, feature locations click cell, according to size selected further feature location point in said prediction circuit of geographical data block;
Step 907, extraction unit obtain the corresponding geodata piece of said feature locations point;
Step 908, acquisition module obtain the signature identification of said geodata piece;
Step 909, the module of adding are added into said signature identification and preset in the download list;
Step 910, download module are downloaded geodata piece corresponding with said signature identification in the said download list successively.
Preferably, said system embodiment can also comprise the preservation module, is used for said downloading geographical data piece directly is saved to this locality; Said this locality can be local cache; Can be the storage unit of navigation terminal yet, can also be other memory device, the present invention does not limit this.In addition, in reality, those skilled in the art can be arranged on above-mentioned module in the navigation terminal or navigation server of navigational system as required, or in navigation terminal and navigation server, are provided with respectively, and the present invention does not also limit this.
For system embodiment, because it is basically corresponding to method embodiment, so description is fairly simple, relevant part gets final product referring to the part explanation of method embodiment.Each system embodiment in this instructions all adopts the mode of going forward one by one to describe, and identical similar part is mutually referring to getting final product between each system embodiment, and each system embodiment stresses all is the difference with other system embodiment.
It is to be noted; Those skilled in the art are easy to expect: it all is feasible that said system embodiment 1-embodiment 3 combination in any are used; So the combination in any between the said system embodiment 1-embodiment 3 all is embodiment of the present invention; But this instructions has not just detailed at this one by one as space is limited.
More than to provided by the present invention a kind of based on navigational system data download method and carried out detailed introduction based on the data downloading system of navigational system; Used concrete example among this paper principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (8)
1. the data download method based on navigational system is characterized in that, comprising:
Current location information generation forecast circuit based on the user; Said generation forecast circuit comprises: extraction meets a plurality of positional informations that preset requirement; Obtain user's road information; Obtaining the directional information of location, serves as the starting point of prediction circuit with user's current position information, generates the prediction circuit with said road information and directional information;
Confirm to meet the geodata piece of presetting rule according to said prediction circuit; The step of said definite geodata piece comprises: the current location information with the user is the initiation feature location point; Size selected further feature location point in said prediction circuit according to geographical data block obtains the corresponding geodata piece of said initiation feature location point and said further feature location point;
Download said geodata piece.
2. the method for claim 1 is characterized in that, also comprises:
Navigation circuit is preset in acquisition;
Whether the current location information of judging said user is present in the said navigation circuit, if then carry out the step of said generation forecast circuit; If, then do not regain navigation circuit.
3. according to claim 1 or claim 2 method is characterized in that said method also comprises: obtain the signature identification of said geodata piece, and said signature identification is added into presets in the download list; Said download step is: download geodata piece corresponding with said signature identification in the said download list successively.
4. according to claim 1 or claim 2 method is characterized in that, also comprises:
Said geodata piece is saved to this locality.
5. the data downloading system based on navigational system is characterized in that, comprising:
Generation module: be used for current location information generation forecast circuit based on the user; Said generation forecast circuit comprises: extraction meets a plurality of positional informations that preset requirement; Obtain user's road information; Obtaining the directional information of location, serves as the starting point of prediction circuit with user's current position information, generates the prediction circuit with said road information and directional information;
Determination module: the geodata piece that is used for confirming to meet presetting rule according to said prediction circuit; Said determination module comprises: feature locations clicks cell: the current location information that is used for the user is the initiation feature location point; According to size selected further feature location point in said prediction circuit of geographical data block, extraction unit: be used to obtain the corresponding geodata piece of said feature locations point;
Download module: be used to download said geodata piece.
6. system as claimed in claim 5 is characterized in that, also comprises:
Obtain module: be used for obtaining to preset navigation circuit;
Judge module: be used for judging whether said user's current location information is present in said navigation circuit, if then trigger the current location information generation forecast circuit of generation module based on the user; Regain navigation circuit if, then do not trigger the acquisition module.
7. system as claimed in claim 5 is characterized in that, said generation module comprises:
Road information obtains the unit: be used to extract and meet a plurality of positional informations that preset requirement, obtain user's road information;
Directional information obtains the unit: be used to the directional information that obtains to locate;
Processing unit: being used for user's current position information is the starting point of prediction circuit, generates the prediction circuit with said road information and directional information.
8. like claim 5,6 or 7 described systems, it is characterized in that, also comprise:
Acquisition module: the signature identification that is used to obtain said geodata piece;
Add module: be used for said signature identification is added into and preset download list.
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| CN102209113A (en) * | 2011-05-24 | 2011-10-05 | 深圳市凯立德科技股份有限公司 | Dynamic map downloading method and server and position service terminal |
| CN102322865B (en) * | 2011-05-26 | 2015-11-04 | 深圳市凯立德科技股份有限公司 | The display packing of the navigation information of the assigned address relevant with mobile device and device |
| WO2015070371A1 (en) * | 2013-11-12 | 2015-05-21 | Harman International Industries, Incorporated | Scheduling download of data of an on-line service |
| CN105100272B (en) * | 2015-08-31 | 2018-09-25 | 深圳市理邦精密仪器股份有限公司 | electrocardiograph intelligent file transmission method and system |
| CN107770260A (en) * | 2017-10-13 | 2018-03-06 | 上海司南卫星导航技术股份有限公司 | Examination hall message file sending method, server, acquisition device, acquisition methods and system |
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| CN1539075A (en) * | 2001-08-06 | 2004-10-20 | ���µ�����ҵ��ʽ���� | Informaton providing method and information providing device |
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