CN101900564A - Dynamic visual angle navigation method, terminal, server and system - Google Patents
Dynamic visual angle navigation method, terminal, server and system Download PDFInfo
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Abstract
The embodiment of the invention provides a dynamic visual angle navigation method. The method includes that initial navigation information is generated, and the initial navigation information contains position information and advancing direction of a navigation terminal; the initial navigation information is uploaded to a navigation server; a navigation data packet generated by the navigation server according to the initial navigation information is acquired, and wherein the navigation data packet contains a plurality of navigation data respectively corresponding to a plurality of preset visual angle regions; and corresponding navigation data is selected to be displayed from the navigation data packet according to the visual angle region where the current visual angle provided by a built-in electronic compass of the navigation terminal is located. The embodiment of the invention also provides a navigation terminal, a navigation server and a navigation system. By applying the invention, three-dimensional navigation data based on any position can be obtained, displaying can be carried out according to the current visual angle, and three-dimensional navigation information of position where a user is located can be truly reflected.
Description
Technical field
The present invention relates to navigation field, relate in particular to a kind of air navigation aid, terminal, server and system of dynamic visual angle.
Background technology
Mostly existing three-dimensional navigation is simply cartographic information to be stored in this locality, according to GPS (Global Positioning System, GPS) positional information that provides generates 3-D view with certain account form, and could use its three-dimensional navigation pattern in the time of generally can only on highway, advancing, because the navigation terminal internal storage space is limited, generally can only store the three-dimensional map information that is positioned at vehicle visual angle on the highway, the three-dimensional navigation information of position often can not provide outside the highway, and the visual angle of the three-dimensional image information of each position is changeless, can not truly reflect the three-dimensional navigation information of user present position.
Summary of the invention
Embodiment of the invention technical matters to be solved is, a kind of air navigation aid, terminal, server and system of dynamic visual angle is provided.Three-dimensional navigation data can be obtained, and the three-dimensional navigation information of user present position can be reflected really based on the optional position.
In order to solve the problems of the technologies described above, the embodiment of the invention provides a kind of air navigation aid of dynamic visual angle, and described method comprises:
Generate initial navigation information, described initial navigation information comprises the positional information and the direct of travel of navigation terminal;
The navigation server is uploaded described initial navigation information;
Obtain described navigation server according to the navigation pack that described initial navigation information generates, comprise in the described navigation pack a plurality of respectively with the default corresponding navigation data of a plurality of field of view;
The field of view at the current visual angle place that provides according to the built-in electronic compass of navigation terminal is chosen corresponding navigation data and is shown from described navigation pack.
Correspondingly, the embodiment of the invention also provides a kind of navigation terminal, comprising:
The initial information generation unit is used to generate initial navigation information, and described initial navigation information comprises the positional information and the direct of travel of navigation terminal;
Uploading unit is used for the navigation server and uploads described initial navigation information;
The navigation data acquiring unit is used to obtain the navigation pack that initial navigation information that described navigation server uploads according to described uploading unit generates, comprise in the described navigation pack a plurality of respectively with the default corresponding navigation data of a plurality of field of view;
Electronic compass is used to provide the current visual angle of navigation terminal;
The navigation display unit, the field of view that the current visual angle place of the described navigation terminal that provides according to described electronic compass is provided is chosen corresponding navigation data from described navigation pack and is shown.
Correspondingly, the embodiment of the invention also provides a kind of navigation server, comprising:
Navigational route database is used to store navigation map information, and described navigation map information comprises a three-dimensional navigation image;
The initial navigation information acquiring unit is used to obtain the initial navigation information that navigation terminal sends, and described initial navigation information comprises the positional information and the direct of travel of navigation terminal;
Navigation map information is chosen the unit, is used for choosing navigation map information according to described initial navigation information from navigational route database;
The navigation pack generation unit, be used for according to described navigation map information and default field of view generate a plurality of respectively with the corresponding navigation data of described a plurality of field of view, and generating described navigation pack according to described a plurality of navigation datas, described navigation pack comprises the navigation data at a plurality of visual angles;
The navigation data transmitting element is used for the navigation terminal and sends described navigation pack.
Correspondingly, the embodiment of the invention also provides a kind of navigational system, and described navigational system comprises navigation server and at least one navigation terminal, wherein:
Described navigation server is used to store navigation map information, and described navigation map information comprises a three-dimensional navigation image; Obtain the initial navigation information that navigation terminal sends, described initial navigation information comprises the positional information and the direct of travel of navigation terminal; According to described initial navigation information from navigational route database choose navigation map information according to described navigation map information and default field of view generate a plurality of respectively with the corresponding navigation data of described a plurality of field of view, and generate navigation pack according to described a plurality of navigation datas; The navigation terminal sends described navigation pack;
Described navigation terminal is used to generate described initial navigation information; The navigation server is uploaded described initial navigation information; Obtain described navigation server according to the navigation pack that described initial navigation information generates, comprise in the described navigation pack a plurality of respectively with the described default corresponding navigation data of a plurality of field of view; The field of view at the current visual angle place that provides according to the built-in electronic compass of navigation terminal is chosen corresponding navigation data and is shown from described navigation pack.
Implement the embodiment of the invention, have following beneficial effect:
The embodiment of the invention sends initial navigation information by the navigation server, obtain the navigation pack that navigation server is beamed back, and then show the navigation data at this visual angle according to the current visual angle that electronic compass provides, can access three-dimensional navigation data based on the optional position, and can show according to current visual angle, can reflect the three-dimensional navigation information of user present position truly.
Description of drawings
Fig. 1 is that the structure of a kind of navigational system in the embodiment of the invention is formed synoptic diagram;
Fig. 2 is that the structure of a kind of navigation terminal in the embodiment of the invention is formed synoptic diagram;
Fig. 3 is a field of view distribution schematic diagram in the embodiment of the invention;
Fig. 4 is that the structure of a kind of navigation server in the embodiment of the invention is formed synoptic diagram;
Fig. 5 is an embodiment schematic flow sheet of the air navigation aid of a kind of dynamic visual angle of the present invention;
Fig. 6 is another embodiment schematic flow sheet of the air navigation aid of a kind of dynamic visual angle of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Fig. 1 is that the structure of a kind of navigational system in the embodiment of the invention is formed synoptic diagram, and this navigational system comprises navigation server 10 and at least one navigation terminal 20, wherein:
Fig. 2 is that the structure of a kind of navigation terminal in the embodiment of the invention is formed synoptic diagram, and this navigation terminal comprises:
Initial information generation unit 201 is used to generate initial navigation information, and described initial navigation information comprises the positional information and the direct of travel of navigation terminal; Particularly, described initial information generation unit 201 can generate described initial navigation information by navigation terminal built-in gps system or sensor (for example inertial acceleration sensor etc.), this initial navigation information comprises the positional information and the direct of travel of navigation terminal, can also comprise information such as travel rate.
Navigation data acquiring unit 203 is used to obtain described navigation server according to the navigation pack that described initial navigation information generates, comprise in the described navigation pack a plurality of respectively with the default corresponding navigation data of a plurality of field of view; Particularly, the visual angle of navigation terminal can be preset as a plurality of field of view, for example the visual angle is divided in the horizontal direction 5 zones as shown in Figure 3, wherein 0 °～25 ° is the first border field of view, 25 °～65 ° is the first secondary field of view, 65 °～115 ° is the main perspective zone, 115 °～155 ° is that the second secondary field of view and 155 °～180 ° are the second border field of view, can comprise 5 navigation datas in the described navigation pack: the main perspective navigation data respectively at above-mentioned 5 field of view correspondences, the first secondary visual angle navigation data, the second secondary visual angle navigation data, first border visual angle navigation data and visual angle, second border navigation data, the navigation data at described a plurality of visual angles can be the Navigation Picture of different visual angles further.This navigation pack can also comprise the navigation data at least one prediction a plurality of visual angle constantly, the navigation data at for example back 1 second, back 2 seconds a plurality of visual angles constantly further.In other embodiments, the visual angle can be divided into 3 or more field of view, for example only comprise main perspective zone and border field of view, or comprise the secondary field of view more than 3, not break away from thought of the present invention.
Further, described navigation terminal can also comprise judging unit 206 and update request unit 207, wherein:
Described judging unit 206 can comprise:
The Preset Time judge module is used to judge whether to arrive default update time; For example navigation terminal is default every automatic navigation server transmission 5 second second update request, and can pick up counting when receiving the navigation pack of navigation server transmission this moment, arrives 5 seconds and then notifies judge module 206 outputs sure judged result.
The visual angle judge module, whether the current visual angle that is used to judge navigation terminal the visual angle, border; Particularly, the visual angle judge module judges whether the current visual angle of described navigation terminal belongs to the first border field of view or the second border field of view, if then notify judge module 206 outputs sure judged result.
The error amount judge module is used for judging whether described navigation pack that receives and the described error amount of the initial navigation information that constantly corresponding prediction navigation information and current initial information generation unit 201 generate of predicting reach default fault value; Particularly, the computing method of described error amount can for: when variation has taken place for the direct of travel of navigation terminal, for example navigation terminal has changeed Δ ° in the counterclockwise direction on former direct of travel when back 1 second prediction arrives constantly, error amount=travel rate (meter per second) * * sin Δ 1 (second) of the initial navigation information of Ci Shi described prediction navigation information and current generation ° then, default fault value for example is made as 10 meters, then when the described error amount that calculates is not less than 10 meters, then notify judge module 206 outputs sure judged result.
The cumulative errors judge module is used for judging whether a plurality of predictions prediction navigation information and described cumulative errors value of the initial navigation information that generates when constantly arriving of predicting constantly of the described navigation pack that receives reaches default fault value; The compute classes of described error is similar to the computing method of error amount judge module, be error amount=travel rate (meter per second) * * sin Δ 1 (second) °, cumulative errors is a plurality of predictions error amount accumulation constantly, when cumulative errors was not less than default fault value when these three predictions constantly arrived in for example back 1 second, back 2 seconds, back 3 seconds for example 10 meters, then notify judge module 206 outputs sure judged result.
Fig. 4 is that the structure of a kind of navigation server in the embodiment of the invention is formed synoptic diagram, and this navigation server can comprise as shown in the figure:
Initial navigation information acquiring unit 402 is used to obtain the initial navigation information that navigation terminal sends, and described initial navigation information comprises the positional information and the direct of travel of navigation terminal;
Navigation map information is chosen unit 403, is used for choosing navigation map information according to described initial navigation information from navigational route database 401; Particularly, can in navigational route database, choose corresponding navigation map information according to positional information in the initial navigation information and direct of travel.
Navigation pack generation unit 404, be used for according to described navigation map information and default a plurality of field of view generate a plurality of respectively with the corresponding navigation data of described a plurality of field of view, and generate navigation pack according to described a plurality of navigation datas; Particularly, described navigation data can be the navigation data that generates according to default different visual angles zone based on described three-dimensional navigation image, described navigation data can comprise the Navigation Picture with described corresponding field of view, and described navigation pack can also comprise the navigation data at least one prediction a plurality of visual angle constantly.
Navigation data transmitting element 405 is used for the navigation terminal and sends described navigation pack.
Further, described navigation server can also comprise:
Prediction navigation information generation unit is used for generating at least one prediction prediction navigation information constantly according to described initial navigation information, and described prediction navigation information is included in the prediction positional information and the direct of travel of navigation terminal constantly; Particularly, described prediction navigation information generation unit can calculate according to the positional information in the described initial navigation information, direct of travel and rate information, suppose to obtain under the constant situation of speed the prediction navigation information of at least one prediction navigation terminal constantly, this prediction navigation information can comprise the prediction positional information and the direct of travel of navigation terminal constantly.Described navigation information is chosen the unit and is chosen prediction navigation map information constantly according to the prediction navigation information that described prediction navigation information generation unit generates in navigational route database; The navigation map information that described navigation pack generation unit is chosen unit selection according to described navigation information generates navigation pack, the navigation data, at least one prediction that described navigation pack comprises current a plurality of visual angles constantly the prediction navigation information and with the prediction navigation data at the constantly corresponding a plurality of visual angles of described prediction.
Fig. 5 is an embodiment schematic flow sheet of the air navigation aid of a kind of dynamic visual angle in the embodiment of the invention, and this method flow comprises:
Step S501 generates initial navigation information, and described initial navigation information comprises the positional information and the direct of travel of navigation terminal; Particularly, navigation terminal can generate described initial navigation information by built-in gps system or sensor (for example inertial acceleration sensor etc.), this initial navigation information comprises the positional information and the direct of travel of navigation terminal, can also comprise information such as travel rate.
Step S502, the navigation server is uploaded described initial navigation information; Particularly, navigation terminal can be sent to navigation server by the described initial navigation information that wireless base station apparatus will generate.After navigation server gets access to described initial navigation information, can from navigational route database, choose navigation map information according to described initial navigation information, generate navigation pack and send described navigation pack according to the navigation map information of choosing, comprise the corresponding navigation data of a plurality of and default field of view in the navigation pack.Can be preset as a plurality of field of view to the navigation terminal visual angle, for example the visual angle is divided in the horizontal direction 5 zones as shown in Figure 3, wherein 0 °～25 ° is that the first border field of view, 25 °～65 ° are the first secondary field of view, 65 °～115 ° for main perspective zone, 115 °～155 ° are that the second secondary field of view and 155 °～180 ° are the second border field of view, and the navigation data at the described a plurality of visual angles that obtain can be corresponding one by one respectively with these five field of view.In other embodiments, the visual angle can be divided into 3 or more field of view, for example only comprise main perspective zone and border field of view, or comprise the secondary field of view more than 3, not break away from thought of the present invention.Navigation server can according to the navigation map information of choosing and above-mentioned 5 field of view generate 5 with the regional corresponding navigation data of different visual angles, comprise: main perspective navigation data, the first secondary visual angle navigation data, the second secondary visual angle navigation data, first border visual angle navigation data and visual angle, second border navigation data, described navigation data can comprise the Navigation Picture corresponding with described field of view.
Further, when comprising the rate information of navigation terminal in the described initial navigation information, navigation server can generate at least one prediction prediction navigation information constantly according to described initial navigation information, choose prediction navigation map information constantly according to described at least one prediction prediction navigation information constantly from navigational route database, and generate navigation pack according to the navigation map information chosen, described navigation pack comprise current a plurality of navigation data, at least one prediction constantly the prediction navigation information and with described prediction a plurality of prediction navigation datas constantly.
Step S503 obtains navigation pack from navigation server, comprise in the described navigation pack a plurality of respectively with the default corresponding navigation data of a plurality of field of view;
Step S504, the field of view at the current visual angle place that provides according to the built-in electronic compass of navigation terminal is chosen corresponding navigation data and is shown from described navigation pack.For example working as described electronic compass provides current visual angle in the main perspective zone, then choosing the main perspective navigation data corresponding with the main perspective zone in navigation pack shows, or provide current visual angle in the first secondary field of view when described electronic compass, then in navigation pack, choose the first secondary visual angle navigation data corresponding and show with the first secondary field of view.Same, when prediction arrives constantly, can in navigation pack, choose this prediction navigation data constantly according to the current visual angle region that electronic compass provides and show.
Fig. 6 is another embodiment schematic flow sheet of the air navigation aid of a kind of dynamic visual angle of the present invention, and this method flow comprises:
Step S601～step S604 is identical with step S501 and S504 among the last embodiment, does not repeat them here.
Step S605 arrives prediction during the moment, judges the current navigation update condition that whether satisfies.Particularly, described navigation update condition can for:
Arrive default update time; For example navigation terminal can be preset the automatic navigation server transmission update request every 5 seconds, can pick up counting when receiving the navigation pack of navigation server transmission this moment, navigation terminal judges whether timing arrives 5 seconds in the arrival prediction during moment, if then satisfy the navigation update condition.
Or whether current visual angle is the visual angle, border; Particularly, the visual angle judge module judges whether the current visual angle of described navigation terminal belongs to as the first border field of view among Fig. 3 or the second border field of view, if then satisfy the navigation update condition.
Or reach default fault value with the described error amount of the initial navigation information of constantly corresponding prediction navigation information and current generation of predicting in the described navigation pack that receives; Particularly, the computing method of described error amount can for: when variation has taken place for the direct of travel of navigation terminal, for example navigation terminal has changeed Δ ° in the counterclockwise direction on former direct of travel when back 1 second prediction arrives constantly, error amount=travel rate (meter per second) * * sin Δ 1 (second) of the initial navigation information of Ci Shi described prediction navigation information and current generation ° then, default fault value for example is made as 10 meters, then when the described error amount that calculates is not less than 10 meters, then satisfy the navigation update condition.
Or prediction navigation information and the described cumulative errors value of the initial navigation information that generates when constantly arriving of predicting constantly of a plurality of predictions in the described navigation pack that receives reaches default fault value.The compute classes of described error is similar to the computing method of error amount judge module, be error amount=travel rate (meter per second) * * sin Δ 1 (second) °, cumulative errors is a plurality of predictions error amount accumulation constantly, when cumulative errors was not less than default fault value when these three predictions constantly arrived in for example back 1 second, back 2 seconds, back 3 seconds for example 10 meters, then satisfy the navigation update condition.
When at least a in the update condition of above-mentioned 4 kinds of navigation satisfied, then judge currently whether satisfy the result of navigation update condition for being execution in step S607, otherwise execution in step S606.
Step S606, the current visual angle that provides according to electronic compass is chosen this prediction navigation data constantly and is shown in navigation pack.
Step S607, navigation server send the navigation data request of upgrading.The request of described renewal navigation data comprises the initial navigation information of current generation, and the request navigation server issues the navigation pack of renewal.
The embodiment of the invention sends initial navigation information by the navigation server, obtain the navigation pack that navigation server is beamed back, and then show the navigation data at this visual angle according to the current visual angle that electronic compass provides, can access three-dimensional navigation data based on the optional position, and can show according to current visual angle, can reflect the three-dimensional navigation information of user present position truly.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
Above disclosed only is a kind of preferred embodiment of the present invention, certainly can not limit the present invention's interest field with this, one of ordinary skill in the art will appreciate that all or part of flow process that realizes the foregoing description, and, still belong to the scope that invention is contained according to the equivalent variations that claim of the present invention is done.
Claims (12)
1. the air navigation aid of a dynamic visual angle is characterized in that, described method comprises:
Generate initial navigation information, described initial navigation information comprises the positional information and the direct of travel of navigation terminal;
The navigation server is uploaded described initial navigation information;
Obtain described navigation server according to the navigation pack that described initial navigation information generates, comprise in the described navigation pack a plurality of respectively with the default corresponding navigation data of a plurality of field of view;
The field of view at the current visual angle place that provides according to the built-in electronic compass of navigation terminal is chosen corresponding navigation data and is shown from described navigation pack.
2. air navigation aid as claimed in claim 1 is characterized in that, comprises after described navigation server is uploaded described initial navigation information:
After described navigation server receives described initial navigation information, choose navigation map information according to described initial navigation information from navigational route database, described navigation map information comprises a three-dimensional navigation image;
Described navigation server according to described navigation map information and described field of view generate a plurality of respectively with the corresponding navigation data of described a plurality of field of view, and generate described navigation pack according to described a plurality of navigation datas;
Send described navigation pack.
3. air navigation aid as claimed in claim 2 is characterized in that described initial navigation information also comprises travel rate information; After uploading described initial navigation information, described navigation server also comprises:
After described navigation server receives the described initial navigation information that comprises travel rate information, generate at least one prediction prediction navigation information constantly according to described initial navigation information;
Choose prediction navigation map information constantly according to described prediction navigation information;
Generate navigation pack and send described navigation pack according to the navigation map information chosen, described navigation pack comprise current a plurality of navigation data, at least one prediction constantly the prediction navigation information and with a plurality of prediction navigation datas in this prediction moment.
4. air navigation aid as claimed in claim 3 is characterized in that, described method also comprises:
When arriving described prediction during the moment, judge whether to satisfy the navigation update condition, if then the navigation server sends the navigation data request of upgrading.
5. air navigation aid as claimed in claim 4 is characterized in that, described navigation update condition comprises:
Arrive default update time; Or
Current visual angle is the visual angle, border; Or
Reach default fault value with the described error amount of the initial navigation information of constantly corresponding prediction navigation information and current generation of predicting in the described navigation pack that receives; Or
A plurality of predictions in the described navigation pack that receives prediction navigation information and described cumulative errors value of the initial navigation information that generates when constantly arriving of predicting constantly reaches default fault value.
6. a navigation terminal is characterized in that, described navigation terminal comprises:
The initial information generation unit is used to generate initial navigation information, and described initial navigation information comprises the positional information and the direct of travel of navigation terminal;
Uploading unit is used for the navigation server and uploads described initial navigation information;
The navigation data acquiring unit is used to obtain the navigation pack that initial navigation information that described navigation server uploads according to described uploading unit generates, comprise in the described navigation pack a plurality of respectively with the default corresponding navigation data of a plurality of field of view;
Electronic compass is used to provide the current visual angle of navigation terminal;
The navigation display unit, the field of view that the current visual angle place of the described navigation terminal that provides according to described electronic compass is provided is chosen corresponding navigation data from described navigation pack and is shown.
7. navigation terminal as claimed in claim 6 is characterized in that, the navigation information that described initial information generation unit generates also comprises travel rate information;
The described navigation pack that described navigation data acquiring unit gets access to from navigation server also comprises at least one prediction prediction navigation information and corresponding prediction navigation data constantly.
8. navigation terminal as claimed in claim 7 is characterized in that, described navigation terminal also comprises:
Judging unit is used for when described prediction arrives constantly, judges whether navigation terminal satisfies the navigation update condition;
The update request unit, be used for when the judged result of described judging unit when being, the navigation server sends the navigation data request of upgrading.
9. navigation terminal as claimed in claim 8 is characterized in that, described judging unit comprises:
The Preset Time judge module is used to judge whether to arrive default update time;
The visual angle judge module, whether the current visual angle that is used to judge navigation terminal the visual angle, border;
The error amount judge module is used for judging whether described navigation pack that receives and the described error amount of the initial navigation information of constantly corresponding prediction navigation information and current generation of predicting reach default fault value;
The cumulative errors judge module is used for judging whether a plurality of predictions prediction navigation information and described cumulative errors value of the initial navigation information that generates when constantly arriving of predicting constantly of the described navigation pack that receives reaches default fault value;
When the sure judged result of above-mentioned at least one module generation, then the judged result of judging unit is for being.
10. a navigation server is characterized in that, described navigation server comprises:
Navigational route database is used to store navigation map information, and described navigation map information comprises a three-dimensional navigation image;
The initial navigation information acquiring unit is used to obtain the initial navigation information that navigation terminal sends, and described initial navigation information comprises the positional information and the direct of travel of navigation terminal;
Navigation map information is chosen the unit, is used for choosing navigation map information according to described initial navigation information from navigational route database;
The navigation pack generation unit, be used for according to described navigation map information and default a plurality of field of view generate a plurality of respectively with the corresponding navigation data of described a plurality of field of view, and generate navigation pack according to described a plurality of navigation datas;
The navigation data transmitting element is used for the navigation terminal and sends described navigation pack.
11. navigation server as claimed in claim 10 is characterized in that, the initial navigation information that described initial navigation information acquiring unit gets access to also comprises the travel rate information of navigation terminal; Described navigation server also comprises:
Prediction navigation information generation unit is used for generating at least one prediction prediction navigation information constantly according to described initial navigation information, and described prediction navigation information is included in the prediction positional information and the direct of travel of navigation terminal constantly;
Described navigation information is chosen the unit and is chosen prediction navigation map information constantly according to the prediction navigation information of described prediction navigation information generation unit generation;
The prediction navigation map information constantly that described navigation pack generation unit is chosen unit selection according to described navigation information generates navigation pack, and described navigation pack comprises current a plurality of navigation datas, at least one prediction prediction navigation information and this prediction a plurality of prediction navigation datas constantly constantly.
12. a navigational system is characterized in that, described navigational system comprises navigation server and at least one navigation terminal, wherein:
Described navigation server is used to store navigation map information; Obtain the initial navigation information that navigation terminal sends, described initial navigation information comprises the positional information and the direct of travel of navigation terminal; Choose navigation map information according to described initial navigation information from navigational route database; According to described navigation map information and default field of view generate a plurality of respectively with the corresponding navigation data of described a plurality of field of view, and generate navigation pack according to described a plurality of navigation datas; The navigation terminal sends described navigation pack;
Described navigation terminal is used to generate described initial navigation information; The navigation server is uploaded described initial navigation information; Obtain described navigation server according to the navigation pack that described initial navigation information generates, comprise in the described navigation pack a plurality of respectively with the described default corresponding navigation data of a plurality of field of view; The field of view at the current visual angle place that provides according to the built-in electronic compass of navigation terminal is chosen corresponding navigation data and is shown from described navigation pack.
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