CN104764448A - Way-finding navigation method - Google Patents
Way-finding navigation method Download PDFInfo
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- CN104764448A CN104764448A CN201510124771.6A CN201510124771A CN104764448A CN 104764448 A CN104764448 A CN 104764448A CN 201510124771 A CN201510124771 A CN 201510124771A CN 104764448 A CN104764448 A CN 104764448A
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- navigation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
Abstract
The invention discloses a way-finding navigation method, which comprises the following steps: A)a path programming step: a navigation starting position and a navigation ending position can be obtained according to the user navigation requirement, and a navigation path is obtained according to the navigation starting position and the navigation ending position, the navigation path comprises a blind area road positioned in a map blind area; B)a navigation information obtaining step: the navigation information corresponding to the navigation path is obtained, the navigation information comprises the blind area navigation information; and C)a navigation step, navigation is carried out based on the navigation information, wherein, when the user moves to the map blind area, the navigation indication is generated based on the blind area navigation information, so that the user can be guided to move along the blind area road. According to the invention, automatic navigation is realized in the map blind area of an electronic map based on the way-finding navigation method, so that region scope used by navigator can be greatly expanded.
Description
Technical field
The present invention relates to navigation field, relate to a kind of pathfinding air navigation aid specifically.
Background technology
Current navigational system on the market adopts GPS (GlobalPositioning System, GPS) to navigate based on electronic chart mostly.Compared by the longitude and latitude of the current location longitude and latitude that detects and electronic chart, show current position, route search is carried out in the final position of recycling current location and input in electronic chart, cooks up best route.Information comparison constantly locating information and electric map route in the process of movement, thus play the effect of navigation.
Be understood that, the prerequisite implementing the navigate mode of above-mentioned routine has corresponding navigation information in electronic chart, such as corresponding with departure place and destination map route.But in practice, electronic chart also exists map blind area (as remote areas such as desert, areas, mountain area).For map blind area, do not comprise associated navigation information in electronic chart or navigation information imperfect.Such as common electronic chart does not comprise the electronics route in more remote field (desert, area, mountain area).When user moves in map blind area, existing navigational system just cannot carry out guidance operation.
Therefore, for the map blind area on electronic chart, need a kind of new pathfinding air navigation aid to realize the pathfinding navigation of map blind area.
Summary of the invention
For the map blind area on electronic chart, the invention provides a kind of pathfinding air navigation aid, described method comprises following steps:
Path planning step, obtain navigation start position and navigation final position according to the navigation needs of user and obtain guidance path according to described navigation start position and described navigation final position, described guidance path comprises the section, blind area being arranged in map blind area;
Navigation information obtaining step, obtains the navigation information that described guidance path is corresponding, and described navigation information comprises blind area navigation information;
Navigation step, navigates based on described navigation information, wherein, generates navigation instruction, thus instruct described user to move along section, described blind area when described user is displaced to described map blind area based on described blind area navigation information.
In one embodiment, described path planning step comprises following steps:
Obtain section, blind area starting point and the blind area road segment end in section, described blind area;
Determine section, described blind area starting point and the route anchor point between the road segment end of described blind area and corresponding tab order, wherein, from the starting point of section, described blind area, described route anchor point is connected successively until described blind area terminal can form section, described blind area according to described tab order.
In one embodiment, described guidance path also comprises map navigation path, and described map navigation path is the path can carrying out path planning and navigation according to the navigation information on electronic chart, and described path planning step comprises following steps:
Obtain described map navigation path based on electronic chart according to described navigation start position and described navigation final position, described map navigation path is in the non-blind area of described map and described map navigation path is communicated to described map blind area;
Interface position based on described map navigation path and described map blind area determines entry position or the exit position of described map blind area on described guidance path, thus determines described blind area section starting point or described blind area road segment end.
In one embodiment, in described navigation information obtaining step, described blind area navigation information comprises the coordinate of section, described blind area starting point, the coordinate of described blind area road segment end, the coordinate of described route anchor point and described tab order.
In one embodiment, described navigation instruction comprises navigation direction, and when described user is positioned at described map blind area, described navigation step comprises following steps:
Obtain current location step, obtain the current location of described user;
Direction step, obtains based on described current location and described blind area navigation information and exports navigation direction to user, and described navigation direction should the correct direction of movement for representing that described user is current.
In one embodiment, in described direction step, when described user is current be not on section, described blind area time, choose the direction of the route anchor point that current location is nearest described in distance in described current location to section, described blind area as described navigation direction.
In one embodiment, in described direction step, when described current location is on the route of described blind area, described direction step comprises following steps:
Choosing the described route anchor point in first, described user front on the route of described blind area is the first anchor point;
Choose the direction of described current location to described first anchor point as described navigation direction.
In one embodiment, described navigation indicates also to comprise and turns to instruction, and when described user is positioned at described map blind area, described navigation step also comprises following steps:
Obtain current location step, obtain the current location of described user;
Obtain steering position step, the route anchor point choosing first steering position in described user front on section, described blind area corresponding based on described navigation information and described current location is the second anchor point, wherein, described steering position is described user along needing the position changing sense of displacement in the displacement process of section, described blind area;
Turn to distance obtaining step, obtain the distance of described second anchor point to described current location;
Turn to instruction step, export to described user when described second anchor point is less than the first particular value to the distance of described current location and turn to instruction.
In one embodiment, described blind area navigation information also comprises fork in the road information, and described navigation instruction comprises fork in the road instruction, and when described user is positioned at described map blind area, described navigation step comprises following steps:
Obtain current location step, obtain the current location of described user;
Fork in the road position acquisition step, determines the position of the fork in the road that described user front is nearest apart from described current location on section, described blind area based on described fork in the road information;
Fork in the road distance obtaining step, obtains the distance of described current location to described fork in the road;
Fork in the road instruction step, exports fork in the road corresponding to described fork in the road when described current location is less than the second particular value to the distance of described fork in the road to described user and indicates.
In one embodiment, the instruction of described fork in the road comprises fork in the road voice message and fork in the road picture.
In one embodiment, described navigation instruction also comprises destination instruction, the instruction of described destination for reminding described user close to destination, when described user is positioned at described map blind area and when the terminal in section, described blind area is described destination, described navigation step comprises following steps:
Obtain the current location of described user;
The distance of described current location to described blind area road segment end is obtained based on the coordinate of described blind area road segment end and described current location;
The instruction of described destination is exported to described user when described current location is less than the 3rd particular value to the distance of described blind area road segment end.
Compared with prior art, tool of the present invention has the following advantages:
Self-navigation can be realized in the map blind area of electronic chart based on pathfinding air navigation aid of the present invention, thus greatly extend the territorial scope of navigation application.
Further feature of the present invention or advantage will be set forth in the following description.Further, Partial Feature of the present invention or advantage will be become apparent by instructions, or be understood by implementing the present invention.Object of the present invention and certain advantages realize by step specifically noted in instructions, claims and accompanying drawing or obtain.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for instructions, with embodiments of the invention jointly for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is process flow diagram according to an embodiment of the invention.
Embodiment
Embodiments of the present invention are described in detail below with reference to drawings and Examples, enforcement personnel of the present invention whereby can fully understand how application technology means solve technical matters in the present invention, and reach the implementation procedure of technique effect and specifically implement the present invention according to above-mentioned implementation procedure.It should be noted that, only otherwise form conflict, each embodiment in the present invention and each feature in each embodiment can be combined with each other, and the technical scheme formed is all within protection scope of the present invention.
For the current problem that cannot realize pathfinding navigation in the map blind area not having electron path, the present invention proposes a kind of pathfinding air navigation aid.Next the implementation process of the pathfinding air navigation aid of one embodiment of the invention is described in detail based on accompanying drawing.Step shown in the process flow diagram of accompanying drawing can perform in the computer system comprising such as one group of computer executable instructions.Although show the logical order of each step in flow charts, in some cases, can be different from the step shown or described by order execution herein.
The first step of pathfinding air navigation aid is pathfinding, the mobile alignment between namely obtaining from origin to destination.Therefore as shown in Figure 1, first the pathfinding air navigation aid of the present embodiment will perform step S100, path planning step.According to user's request, from origin to destination the path of process be exactly the guidance path needing to carry out planning.In the step s 100, first navigation start position and navigation final position is obtained according to the navigation needs of user.Then guidance path is obtained according to navigation start position and navigation final position.The concrete condition of guidance path comprises following situation:
First be that whole guidance path is all in same map blind area;
Next is exactly that whole guidance path is all in non-map blind area;
The part or a few portion that are exactly finally guidance path are positioned at one or more map blind area.
The guidance path not being positioned at map blind area can be planned based on the route information on electronic chart by existing map navigation system.And just cannot plan based on existing map navigation system for the guidance path in map blind area.For convenience of ensuing description, in the present embodiment, will the section, guidance path called after blind area of map blind area be positioned at, will the guidance path called after digital map navigation section of map blind area be positioned at.Be understood that, digital map navigation section is exactly to utilize existing navigational system to carry out the section of guidance operation based on the navigation information in electronic chart.In the step s 100, plan that namely guidance path is plan section, blind area and digital map navigation section respectively.
Because digital map navigation section can be planned based on the navigation information on electronic chart by existing map navigation system, therefore the planning process in digital map navigation section just repeats no more.Connect the planning process in section, lower main description blind area.Planning section, blind area, first will determine the terminal in section, blind area, namely obtains section, blind area starting point and the blind area road segment end in section, blind area.
Be understood that, when whole guidance path is all in same map blind area, when namely guidance path does not comprise digital map navigation section, navigation start position and navigation final position are just respectively section, blind area starting point and blind area road segment end.
When guidance path part is positioned at map blind area, now guidance path is just combined by section, one or more blind area and one or more digital map navigation section and forms.Here for certain map blind area of guidance path process, the entry position entering map blind area along guidance path is section, blind area starting point, and the exit position entering map blind area along guidance path is blind area road segment end.If navigation start position or navigation final position are arranged in this map blind area, so navigation start position or navigation final position are just section, blind area starting point or blind area road segment end.
In the case, in the step s 100, first plan a circuit roughly from navigation start position to navigation final position thus determine guidance path the map blind area of process and non-map blind area; Then obtain map navigation path based on electronic chart according to navigation start position and navigation final position, the starting point of map navigation path here or terminal are connected to map blind area; The entry position of map blind area or exit position on the interface position determination guidance path of last guidance path and map blind area according to the map, thus determine section, blind area starting point or blind area road segment end.
Just section, blind area can be planned after section, blind area starting point and blind area road segment end obtain.In the present embodiment, for map blind area, be collected the routing information of map blind area in advance.Here routing information comprises many blind area routes in map blind area.Every bar route is made up of route start, route terminal and multiple route anchor point.A blind area route from route start to route terminal just can be formed according to specific tab order successively adapter path starting point, multiple route anchor point and route terminal.
In the process in planning section, blind area, determine corresponding route start and route terminal according to section, blind area starting point and blind area road segment end thus determine one or several blind area route in map blind area.Then require to select to determine that a route is wherein as the section, blind area of carrying out Present navigation according to concrete user.
Because pathfinding air navigation aid of the present invention is mainly for solving the pathfinding navigation problem of map blind area, be therefore all in non-map blind area for whole guidance path, the situation that namely guidance path does not comprise section, blind area just not describes.
After path planning completes, can navigate based on the path of having planned.In the present embodiment, according to the type cases in path, different navigate modes is taked.First for digital map navigation section, when user is displaced on digital map navigation section, first perform step S101, obtain digital map navigation information.Then perform step S102, carry out digital map navigation based on digital map navigation information.Because the related navigational information in digital map navigation section has been included in existing electronic chart.Therefore, the detailed process of digital map navigation just repeats no more.
One of emphasis of the present invention is to navigate for the section, blind area in section, blind area.When user is displaced on section, blind area, first perform step S103, obtain blind area navigation information.In the present embodiment, acquisition is information corresponding to the section, blind area determined in step S100.Namely blind area navigation information comprises the coordinate of section, blind area starting point, the coordinate of blind area road segment end, the coordinate of route anchor point and tab order.
Then just perform navigation step, navigate based on blind area navigation information.The first consumer-oriented moving direction of air navigation aid of the present embodiment.In the process of consumer-oriented moving direction, first perform step S110, obtain current location step, obtain the current location of user.Concrete, it is adjust back latitude and longitude information by GPS to determine vehicle location that the step S110 of the present embodiment and below this type of obtain in the step of current location.
Then perform step S111, obtain navigation direction step, obtain navigation direction based on current location and blind area navigation information.Here, navigation direction should the correct direction of movement for representing that user is current.
In the present embodiment, connect section, blind area starting point, route anchor point and blind area road segment end successively according to tab order and namely can form section, blind area.If moved along section, blind area, so the mobile alignment of user will according to tab order through each route anchor point.The moving direction of any time must point to the nearest route anchor point in front.
Based on above-mentioned analysis, in step S111, first determine first route anchor point in user front on the route of blind area.In the present embodiment, by position mark current for user on section, blind area, be exactly so first route anchor point in user front according to first route anchor point of tab order along section, blind area after current location.Now just can obtain current location to the direction of first route anchor point in user front and by it as navigation direction.
Navigation direction in the present embodiment is the correct direction along the movement of section, blind area, but is not necessarily consistent based on the traffic direction of the current reality of practical operation or road conditions etc. factor user and navigation direction.In order to ensure that user moves along section, blind area as much as possible, improving the degree of safety of user's movement, making user can arrive destination smoothly, the method for the present embodiment also comprises anisotropy and reminds step.When user actual moving direction and navigation direction is inconsistent thus when causing user will leave section, blind area, navigational system will give the alarm to user, reminding user break-in.In the present embodiment, the current direction of advancing of vehicle is determined by horizontal gyro.
It is pointed out that the prerequisite of above-mentioned navigation direction determination mode is that user is on section, blind area here.But in practice, deposit user and be not in situation on section, blind area (when entering blind area at the very start not on section, blind area, or moving direction mistake finally causes mobile alignment to depart from section, blind area).Now just need to rectify a deviation to the walking along the street line that moves forward into of user, move it on section, blind area.In such cases, in order to make user can move to as far as possible fast on section, blind area, route anchor point nearest for distance current location instructs user to move as moving target by the present embodiment.Route anchor point on section, searching loop blind area, thus find out the route anchor point near current location, and by vehicle deviation rectifying on route location.
The air navigation aid of this enforcement points out current correct moving direction to instruct user to move by instant to user.But consider the delay that user is reflected, when user moving speed is very fast, if navigation direction changes, user may not change oneself moving direction immediately, thus cause the skew of mobile alignment, even cause the generation of accident, add the potential safety hazard of movement.In order to avoid the generation of above-mentioned situation, the method for the present embodiment have employed the mode of reminding in advance.In user's moving process, when the position of user needs break-in close to needing to shift to an earlier date reminding user front during the position changing moving direction.
In order to reach above-mentioned target, first the present embodiment will determine steering position.Here, steering position is user along needing the position changing sense of displacement in the displacement process of section, blind area.First perform step S120, obtain current location step, obtain the current location of user.Then perform step S121, obtain steering position step, determine first (distance current location is nearest) steering position in user front on section, blind area based on navigation information and current location.Because section, blind area in the present embodiment is connecting and composing based on a series of route anchor point.Therefore specific in the present embodiment, the change point of sense of displacement is the specific route anchor point on section, blind area.Therefore the net result obtained in step S121 is the route anchor point of corresponding actual steering position.
Then just can perform step S122, turn to distance obtaining step, obtain when distance between user and steering position, be namely route anchor point that first steering position the is corresponding distance to current location in the present embodiment.In order to improve safety coefficient, ensureing the instantaneity turning to instruction to export, ideally in the whole displacement process of user, all should perform step S122, thus the distance at any time between supervisory user and steering position.But needing data volume to be processed to reduce in navigation procedure, in the present embodiment, have employed the mode of timing monitoring.Namely with the distance between Fixed Time Interval timing acquisition user and steering position.
Then step S124 is performed, judging distance step.In step S124, set a specific distance as safe distance.When route anchor point corresponding to first steering position is less than safe distance to the distance of current location time, just perform step S125, export to user and turn to instruction.In the present embodiment, reminding turning comprises the target direction turned to, the distance of steering position and current location.Then distance detection is proceeded when route anchor point corresponding to first steering position is more than or equal to the distance of current location the safe distance set time.
Be understood that, before arriving user the steering position obtained in step S121, the nearest steering position of distance users is all this steering position always.Therefore step S120 and step S121 only after user turns to, need perform when first steering position in user front changes.Based on above-mentioned analysis, in the present embodiment, also need to perform step S127 after step S125, judge whether user have passed steering position, when user have passed steering position, namely again perform step S120 and step S121 when first steering position in user front changes, obtain the steering position that the new distance users in user front is nearest.If user is not also by steering position, then continues to perform step S125, export reminding turning.
The method of the present embodiment also comprises destination and reminds, and namely indicates to shift to an earlier date reminding user user close to generating destination time destination (navigation final position).When non-blind area at map, the destination of user, destination is reminded and is completed based on map navigation system, does not just repeat it here.When the destination of user is in map blind area, corresponding blind area road segment end is the destination of user.The present embodiment adopts similar generation to turn to the process of instruction to generate destination instruction in the case.
First perform step S141, obtain the current location of user.Then perform step S142, obtain the distance of current location to blind area road segment end based on the coordinate of blind area road segment end and current location.Then step S144 is performed, judging distance step.In step S144, set a specific distance as tip distance (in the present embodiment, the tip distance for destination is set as 50 meters).Just perform step S145 when blind area road segment end is less than tip distance to the distance of current location, export destination instruction to user.Then distance detection is proceeded when blind area road segment end is more than or equal to the distance of current location the tip distance set.
After step S145 performs, next perform step S127, judge whether user reaches destination, perform step S148 when user arrives destination, whole navigation procedure completes.If user does not also arrive destination, then continue to perform step S125, export destination prompt.
In the present embodiment, blind area navigation information also comprises fork in the road information.In order to more fully instruct user to move, the air navigation aid of the present embodiment also generates the instruction of corresponding fork in the road, to point out relevant fork in the road situation to user based on the fork in the road information in the navigation information of blind area.Because section, blind area may comprise multiple fork in the road, in order to make navigation information more simple and clear directly, only to the information of the nearest fork in the road of user reminding user front distance users in the present embodiment, i.e. first fork in the road in user front.
For achieving the above object, the present embodiment have employed the step similar with generating reminding turning and points out to generate fork in the road.First the fork in the road that on section, blind area, user front distance users is nearest will be determined.First perform step S130, obtain current location step, obtain the current location of user.Then perform step S131, fork in the road position acquisition step, determine the position of the fork in the road that user front distance current location is nearest on section, blind area based on fork in the road information.Similar steering position, the position, fork in the road of the present embodiment is also corresponding specific route anchor point.
Then just can perform step S132, fork in the road distance obtaining step, obtains the distance of current location to fork in the road.Namely be the distance of route anchor point corresponding to fork in the road to current location in the present embodiment.Also for ease of need data volume to be processed in reduction navigation procedure while and improve safety coefficient, ensure to have employed the instantaneity that fork in the road instruction exports the mode of timing monitoring at the present embodiment, perform step S132 with Fixed Time Interval.
Then step S134 is performed, judging distance step.In step S134, set a specific distance as reminding distance.Just perform step S135 when current location is less than reminds distance to the distance of fork in the road, export fork in the road instruction to user.In the present embodiment, fork in the road instruction comprises the distance of fork in the road picture, fork in the road voice reminder and fork in the road and current location.Equally, then distance detection is proceeded when current location is more than or equal to the distance of fork in the road the prompting distance set.
Similar step S120 and S121, step S130 and step S131 only user by behind fork in the road, need perform when first fork in the road in user front changes.Therefore the present embodiment also needs to perform step S177 after step S135, judges whether user have passed fork in the road, again performs step S130 and step S131 when user have passed fork in the road.If user is not also by fork in the road, then continues to perform step S135, export fork in the road prompting.
To sum up, self-navigation can be realized in the map blind area of electronic chart based on pathfinding air navigation aid of the present invention, thus greatly extend the territorial scope of navigation application.
Although embodiment disclosed in this invention is as above, the embodiment that described content just adopts for the ease of understanding the present invention, and be not used to limit the present invention.Method of the present invention also can have other various embodiments.When not deviating from essence of the present invention, those of ordinary skill in the art are when making various corresponding change or distortion according to the present invention, but these change accordingly or are out of shape the protection domain that all should belong to claim of the present invention.
Claims (11)
1. a pathfinding air navigation aid, is characterized in that, described method comprises following steps:
Path planning step, obtain navigation start position and navigation final position according to the navigation needs of user and obtain guidance path according to described navigation start position and described navigation final position, described guidance path comprises the section, blind area being arranged in map blind area;
Navigation information obtaining step, obtains the navigation information that described guidance path is corresponding, and described navigation information comprises blind area navigation information;
Navigation step, navigates based on described navigation information, wherein, generates navigation instruction, thus instruct described user to move along section, described blind area when described user is displaced to described map blind area based on described blind area navigation information.
2. the method for claim 1, is characterized in that, described path planning step comprises following steps:
Obtain section, blind area starting point and the blind area road segment end in section, described blind area;
Determine section, described blind area starting point and the route anchor point between the road segment end of described blind area and corresponding tab order, wherein, from the starting point of section, described blind area, described route anchor point is connected successively until described blind area terminal can form section, described blind area according to described tab order.
3. method as claimed in claim 2, it is characterized in that, described guidance path also comprises map navigation path, and described map navigation path is the path can carrying out path planning and navigation according to the navigation information on electronic chart, and described path planning step comprises following steps:
Obtain described map navigation path based on electronic chart according to described navigation start position and described navigation final position, described map navigation path is in the non-blind area of described map and described map navigation path is communicated to described map blind area;
Interface position based on described map navigation path and described map blind area determines entry position or the exit position of described map blind area on described guidance path, thus determines described blind area section starting point or described blind area road segment end.
4. method as claimed in claim 2 or claim 3, it is characterized in that, in described navigation information obtaining step, described blind area navigation information comprises the coordinate of section, described blind area starting point, the coordinate of described blind area road segment end, the coordinate of described route anchor point and described tab order.
5. method as claimed in claim 4, it is characterized in that, described navigation instruction comprises navigation direction, and when described user is positioned at described map blind area, described navigation step comprises following steps:
Obtain current location step, obtain the current location of described user;
Direction step, obtains based on described current location and described blind area navigation information and exports navigation direction to user, and described navigation direction should the correct direction of movement for representing that described user is current.
6. method as claimed in claim 5, it is characterized in that, in described direction step, when described user is current be not on section, described blind area time, choose the direction of the route anchor point that current location is nearest described in distance in described current location to section, described blind area as described navigation direction.
7. method as claimed in claim 5, it is characterized in that, in described direction step, when described current location is on the route of described blind area, described direction step comprises following steps:
Choosing the described route anchor point in first, described user front on the route of described blind area is the first anchor point;
Choose the direction of described current location to described first anchor point as described navigation direction.
8. method as claimed in claim 4, is characterized in that, described navigation indicates also to comprise and turns to instruction, and when described user is positioned at described map blind area, described navigation step also comprises following steps:
Obtain current location step, obtain the current location of described user;
Obtain steering position step, the route anchor point choosing first steering position in described user front on section, described blind area corresponding based on described navigation information and described current location is the second anchor point, wherein, described steering position is described user along needing the position changing sense of displacement in the displacement process of section, described blind area;
Turn to distance obtaining step, obtain the distance of described second anchor point to described current location;
Turn to instruction step, export to described user when described second anchor point is less than the first particular value to the distance of described current location and turn to instruction.
9. method as claimed in claim 4, it is characterized in that, described blind area navigation information also comprises fork in the road information, and described navigation instruction comprises fork in the road instruction, and when described user is positioned at described map blind area, described navigation step comprises following steps:
Obtain current location step, obtain the current location of described user;
Fork in the road position acquisition step, determines the position of the fork in the road that described user front is nearest apart from described current location on section, described blind area based on described fork in the road information;
Fork in the road distance obtaining step, obtains the distance of described current location to described fork in the road;
Fork in the road instruction step, exports fork in the road corresponding to described fork in the road when described current location is less than the second particular value to the distance of described fork in the road to described user and indicates.
10. method as claimed in claim 9, is characterized in that, the instruction of described fork in the road comprises fork in the road voice message and fork in the road picture.
11. methods as claimed in claim 4, it is characterized in that, described navigation instruction also comprises destination instruction, the instruction of described destination is for reminding described user close to destination, when described user is positioned at described map blind area and when the terminal in section, described blind area is described destination, described navigation step comprises following steps:
Obtain the current location of described user;
The distance of described current location to described blind area road segment end is obtained based on the coordinate of described blind area road segment end and described current location;
The instruction of described destination is exported to described user when described current location is less than the 3rd particular value to the distance of described blind area road segment end.
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| WO2022052906A1 (en) * | 2020-09-09 | 2022-03-17 | 华为技术有限公司 | Navigation method, device and system |
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