CN103968847A - Electronic map off-line data organization method and electronic map off-line data organization device - Google Patents
Electronic map off-line data organization method and electronic map off-line data organization device Download PDFInfo
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- CN103968847A CN103968847A CN201410203473.1A CN201410203473A CN103968847A CN 103968847 A CN103968847 A CN 103968847A CN 201410203473 A CN201410203473 A CN 201410203473A CN 103968847 A CN103968847 A CN 103968847A
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
- G01C21/34—Route searching; Route guidance
- G01C21/3407—Route searching; Route guidance specially adapted for specific applications
Abstract
The invention discloses an electronic map off-line data organization method and an electronic map off-line data organization device. The electronic map off-line data organization method comprises the steps of receiving travel path data submitted by a client side; generating electronic map data to be transmitted according to the travel path data submitted by the client side; and transmitting the generated electronic map data to the client side. According to the electronic map off-line data organization method and the electronic map off-line data organization device disclosed by the embodiment of the invention, a user only needs to download the travel path and the electronic map data related to the periphery of the travel path when going out, so that the electronic map data volume needing to be transmitted to the client side is reduced.
Description
Technical field
The present invention relates to intelligent transport technology field, relate in particular to a kind of electronic chart off-line data method for organizing and device.
Background technology
Universal along with wireless communication technique and Geographic Information System, increasing user brings into use electronic chart should be used for travel route planning, for the trip of oneself provides navigation.
In existing electronic chart application, electronic map data is all according to administrative division store and management.Such as, server end can be stored the electronic chart of Beijing and the electronic chart of Tianjin independently.When user is only movable in the scope of Beijing, he only needs to download the electronic chart of Beijing; Equally, user is only in the time of the activity of Tianjin, and he only needs to download the electronic chart of Tianjin.And in the time that user need to arrive Tianjin from Beijing, he just need to download Beijing and Tianjin liang is opened electronic chart simultaneously.
The defect that above-mentioned technology exists is: when user between different cities through time, user need to download the electronic chart in each city, but in fact the most of data in map to be that user is unlikely use.User's bandwidth and the waste of storage space like this, are just caused.
Summary of the invention
In view of this, the present invention proposes a kind of electronic chart off-line data method for organizing and device, need to be to the data volume of the electronic map data of client transmissions to reduce.
First aspect, the embodiment of the present invention provides a kind of electronic chart off-line data method for organizing, and described method comprises:
Receive the trip path data that client is submitted to;
The trip path data of submitting to according to client, generates electronic map data waiting for transmission;
The electronic map data of generation is transferred to client.
Second aspect, the embodiment of the present invention provides a kind of electronic chart off-line data tissue device, and described device comprises:
Trip path receiver module, the trip path data of submitting to for receiving client;
Digital map module, for the trip path data of submitting to according to client, generates electronic map data waiting for transmission;
Electronic chart transport module, for transferring to client by the electronic map data of generation.
Electronic chart off-line data method for organizing and device that the embodiment of the present invention provides, generate electronic map data waiting for transmission by the traffic path data of submitting to according to client, again described electronic map data waiting for transmission is transferred to client, make user in the time of trip, only need to download the electronic map data of trip path and trip path periphery, having reduced need to be to the data volume of the electronic map data of client transmissions.
Brief description of the drawings
By reading the detailed description that non-limiting example is done of doing with reference to the following drawings, it is more obvious that other features, objects and advantages of the present invention will become:
Fig. 1 is the process flow diagram of the electronic chart off-line data method for organizing that provides of first embodiment of the invention;
Fig. 2 is the process flow diagram of digital map in the electronic chart off-line data method for organizing that provides of second embodiment of the invention;
Fig. 3 is the schematic diagram of the route characteristic key point that provides of second embodiment of the invention;
Fig. 4 is the schematic diagram of the periphery feature key points that provides of second embodiment of the invention;
Fig. 5 is the process flow diagram of digital map in the electronic chart off-line data method for organizing that provides of third embodiment of the invention;
Fig. 6 is the process flow diagram of the electronic chart off-line data method for organizing that provides of fourth embodiment of the invention;
Fig. 7 is the structural drawing of the electronic chart off-line data tissue device that provides of fifth embodiment of the invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, in accompanying drawing, only show part related to the present invention but not full content.
Fig. 1 shows the first embodiment of the present invention.
Fig. 1 is the process flow diagram of the electronic chart off-line data method for organizing that provides of first embodiment of the invention.The electronic chart off-line data method for organizing that the present embodiment provides is applied on the server of network side, for the electronic map data to client transmissions according to the dynamic generation in user's trip path, and the electronic map data of generation is transferred to client.Referring to Fig. 1, described electronic chart off-line data method for organizing comprises:
S110, receives the trip path data that client is submitted to.
Described client can be user's hand-hold electronic equipments, can be also PC.And, the trip path data that client can submit to user to set by browser, the trip path data that also can submit to user to set by the client-side program of exploitation.
Described trip path data is the route of the preassigned institute's approach of once going on a journey of user.Concrete, described trip path data shows as on electronic chart by a starting point line to terminal.
In the present embodiment, described trip path is typically the trip path forming through different administrative divisions.For example, set out and arrive the trip path of Tianjin in Shi Cong Beijing, described trip path.And described trip path can be that user plans in advance in client, be committed to server.Or, the path that the data schema such as starting point, point of destination of being submitted to according to client by server obtains.
S120, the trip path data of submitting to according to client, generates electronic map data waiting for transmission.
Receive after the trip path data of client submission, taking described trip path data as foundation, generate electronic map data waiting for transmission.And what the electronic map data waiting for transmission generating can be complete shows described trip path.
Preferably, the trip path data that can submit to according to client, determines on described trip path, and the key point of trip path periphery, then generate key point coverage according to described definite key point, finally generate electronic map data waiting for transmission according to the coverage of key point.
S130, transfers to client by the electronic map data of generation.
Complete after the generation of described electronic map data, the electronic map data of generation is transferred to client by server.
If described client is connected to described server by wired mode, server transfers to client in wired mode by the electronic map data of generation; If described client is connected to described server by wireless mode, server transfers to client by the electronic map data of generation wirelessly.
The trip path data that the present embodiment is submitted to by receiving client, generate electronic map data waiting for transmission according to described trip path data, and described electronic map data is transferred to client, make user no longer need to download the whole electronic chart of the administrative division that trip path relates in when trip, and can only download the electronic chart in trip path and trip path peripheral extent, having reduced need to be to the data volume of the electronic map data of client transmissions.
Fig. 2 to Fig. 4 shows the second embodiment of the present invention.
Fig. 2 is the process flow diagram of digital map in the electronic chart off-line data method for organizing that provides of second embodiment of the invention.In the present embodiment, the electronic map data of server end is stored according to different administrative divisions completely.That is to say, server end independently stores an electronic chart for an administrative division, and stores another electronic chart for another administrative division.And the electronic chart for different administrative division storages does not have overlapping.
Described electronic chart off-line data method for organizing is taking first embodiment of the invention as basis, and further, the trip path data of submitting to according to client, generates electronic map data waiting for transmission and comprise:
S121, resolves trip path data, extracts at least one key point in the setting range along the line of walking along the street footpath.
Described key point comprises route characteristic key point and periphery feature key points.
Fig. 3 is the schematic diagram of the route characteristic key point that provides of second embodiment of the invention.Referring to Fig. 3, Fig. 3 shows the Baoding, effluent north that user plans in client and goes to the path 301 of Tianjin, and shows the route characteristic key point 302 on this path.
Described route characteristic key point is flex point on described trip path or the spaced points of interval the first setpoint distance.Described flex point is when can be user advance along trip path, the point that direct of travel changes at this some place, or road variation point etc.Route characteristic key point can also be some spaced points that are spacedly distributed on trip path, so that electronic map data is extracted in subregion.
Preferably, can obtain described flex point by curvature analysis is carried out in described trip path.Described trip path is a curve, and each point on this curve has the radius-of-curvature of it self correspondence.This radius-of-curvature can characterize the degree of crook of described trip path at this point.The radius-of-curvature of this point is larger, and described trip path is just less at the degree of crook of this point; Contrary, the radius-of-curvature of this point is less, and described trip path is just larger at the degree of crook of this point.Can a radius-of-curvature threshold value be set to described trip path, and all radius-of-curvature are less than to the point of this radius-of-curvature threshold value as the route characteristic key point in described trip path.
If in the preceding paragraph path, described trip path radius-of-curvature a little be all less than described radius-of-curvature threshold value, using the point of this section of path intrinsic curvature radius minimum as route characteristic key point.
Because flex point is the less point of radius-of-curvature on described trip path, the namely larger point of degree of crook, so once determine the flex point in a trip path, just can roughly determine the profile in described trip path.
Certainly,, except the flex point in described trip path, other points on described trip path are also likely selected as route characteristic key point.Such as, the spacing between two flex points of trip on path is larger, when only generating body of a map or chart and be not enough to cover described trip path with the coverage of these two flex points, at least one between these two flex points can be clicked and is selected as route characteristic key point.
Except route characteristic key point, described key point also comprises periphery feature key points.Described periphery feature key points is at a distance of the second setpoint distance and have the information point of feature of setting with described trip path.
Fig. 4 is the schematic diagram of the periphery feature key points that provides of second embodiment of the invention.Fig. 4 shows the Baoding, effluent north that user plans in client and goes to the path 401 of Tianjin, and shows the periphery feature key points 402 in this path.Described periphery feature key points 402 is key points around in described trip path, and described periphery feature key points comprises that described trip path has the point of setting feature around.
Described setting feature mainly refers to the semantic feature of the title of this point.On electronic chart, include the denominative place of a lot of tools, such as " Aug. 1st school ".Title to these places is analyzed, and the place that comprises certain semantic feature in title is chosen as to periphery feature key points.Preferably, can be using the point that comprises " service area ", " hotel " in title as periphery feature key points.
S122, the coverage of calculating key point.
Each key point on map has the coverage of its correspondence.Preferably, can be by taking this key point as the center of circle, the scope that the circle using predeterminable range as radius covers is as the coverage of this key point.
S123, merges the coverage of described key point, generates body of a map or chart waiting for transmission.
Generate after the coverage of each key point, the coverage of all key points is merged.The process that the coverage of described key point is merged can think the coverage of all key points to ask the process of union.That is to say, the point in the coverage of any one key point is all the point of body of a map or chart waiting for transmission.
S124, using the electronic map data in body of a map or chart waiting for transmission as electronic map data waiting for transmission.
Generated body of a map or chart waiting for transmission, the electronic map data in this body of a map or chart waiting for transmission is exactly electronic map data waiting for transmission.
The present embodiment generates electronic map data waiting for transmission by key point coverage has been merged, make the server can be according to determining electronic map data waiting for transmission according to the electronic chart of administrative division storage, thereby realized reducing to the data volume of the electronic map data of client transmissions.
Fig. 5 shows the third embodiment of the present invention.
Fig. 5 is the process flow diagram of digital map in the electronic chart off-line data method for organizing that provides of third embodiment of the invention.In the present embodiment, the electronic map data of server end is not only stored according to administrative division, also carries out piecemeal storage for the electronic map data in same administrative division.That is to say, divide different piecemeals for the electronic map data in same administrative division, and store according to ready-portioned piecemeal.
Described electronic chart off-line data method for organizing is taking first embodiment of the invention as basis, and further, the trip path data of submitting to according to client, generates electronic map data waiting for transmission and comprise:
S125, resolves trip path data, extracts at least one key point in the setting range along the line of walking along the street footpath.
S126, the coverage of calculating key point.
S127, the electronic chart piecemeal that the coverage of key point is related to is as electronic chart piecemeal waiting for transmission.
Calculate after the coverage of key point, the coverage of described key point is corresponded on different electronic chart piecemeals.If include the data in key point coverage in an electronic chart piecemeal, namely the coverage of key point relates to this electronic chart piecemeal, using this electronic chart piecemeal as electronic chart piecemeal waiting for transmission; If do not include the data in key point coverage in an electronic chart piecemeal, namely the coverage of key point does not relate to this electronic chart piecemeal, not using this electronic chart piecemeal as electronic chart piecemeal waiting for transmission.
S128, using the set of electronic chart piecemeal waiting for transmission as electronic map data waiting for transmission.
Determine that after electronic chart piecemeal waiting for transmission, electronic map data in the set of all electronic chart piecemeals waiting for transmission is as electronic map data waiting for transmission.
The present embodiment by electronic chart piecemeal that key point coverage is related to as electronic map data waiting for transmission, make the server can be according to determining electronic map data waiting for transmission by the electronic chart of piece storage, thereby realized reducing to the data volume of the electronic map data of client transmissions.
Fig. 6 shows the fourth embodiment of the present invention.
Fig. 6 is the process flow diagram of the electronic chart off-line data method for organizing that provides of fourth embodiment of the invention.Described electronic chart off-line data method for organizing is taking first embodiment of the invention as basis, further, at the trip path data of submitting to according to client, after generating electronic map data waiting for transmission, also comprise: described electronic map data waiting for transmission is compressed.
Referring to Fig. 6, described electronic chart off-line data method for organizing comprises:
S610, receives the trip path data that client is submitted to.
S620, the trip path data of submitting to according to client, generates electronic map data waiting for transmission.
S630, compresses described electronic map data waiting for transmission.
After having generated electronic map data waiting for transmission, described electronic map data waiting for transmission is compressed.
S640, transfers to client by the electronic map data of generation.
The present embodiment, by after having generated electronic map data waiting for transmission, compresses described electronic map data waiting for transmission, and further having reduced need to be to the data volume of the electronic map data of client transmissions.
Fig. 7 shows the fifth embodiment of the present invention.
Fig. 7 is the structural drawing of the electronic chart off-line data tissue device that provides of fifth embodiment of the invention.Described electronic chart off-line data tissue device, is characterized in that, comprising: trip path receiver module 710, digital map module 720 and electronic chart transport module 740.
The trip path data that described trip path receiver module 710 is submitted to for receiving client.
The trip path data of described digital map module 720 for submitting to according to client, generates electronic map data waiting for transmission.
Described electronic chart transport module 740 is for transferring to client by the electronic map data of generation.
Preferably, described digital map module 720 comprises: the first key point extraction unit 721, the first coverage computing unit 722, coverage merge cells 723 and the first digital map unit 724.
Described the first key point extraction unit 721, for trip path data is resolved, extracts at least one key point in the setting range along the line of walking along the street footpath.
Described the first coverage computing unit 722 is for calculating the coverage of key point.
Described coverage merge cells 723, for the coverage of described key point is merged, generates body of a map or chart waiting for transmission.
Described the first digital map unit 724 for the electronic map data in body of a map or chart waiting for transmission as electronic map data waiting for transmission.
Preferably, described digital map module comprises: the second key point extraction unit 725, the second coverage computing unit 726, piecemeal determining unit 727 and the second digital map unit 728.
Described the second key point extraction unit 725, for trip path data is resolved, extracts at least one key point in the setting range along the line of walking along the street footpath.
Described the second coverage computing unit 726 is for calculating the coverage of key point.
Described piecemeal determining unit 727 for electronic chart piecemeal that the coverage of key point is related to as electronic chart piecemeal waiting for transmission.
Described the second digital map unit 728 for the set using electronic chart piecemeal waiting for transmission as electronic map data waiting for transmission.
Preferably, described key point comprises route characteristic key point and periphery feature key points.
Preferably, described route characteristic key point is the key point on described trip path, and, described route characteristic key point comprises the flex point on described trip path, wherein, described flex point is when to be user advance along trip path, the point that direct of travel changes.
Preferably, described periphery feature key points is key point around in described trip path, and described periphery feature key points comprises that described trip path has the point of setting feature around.
Preferably, described electronic map data transmitting device also comprises: data compressing module 730.
Described data compressing module 730, for the trip path data submitting to according to client, after generating electronic map data waiting for transmission, is compressed described electronic map data waiting for transmission.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Those of ordinary skill in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on the network that multiple calculation elements form, alternatively, they can realize with the executable program code of computer installation, thereby they can be stored in memory storage and be carried out by calculation element, or they are made into respectively to each integrated circuit modules, or the multiple modules in them or step are made into single integrated circuit module realize.Like this, the present invention is not restricted to the combination of any specific hardware and software.
Each embodiment in this instructions all adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment, the same or analogous part between each embodiment mutually referring to.
Finally, also it should be noted that, in this article, relation such as the first and second grades belongs to and is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply and between these entities or operation, have the relation of any this reality or sequentially.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, to those skilled in the art, the present invention can have various changes and variation.All any amendments of doing, be equal to replacement, improvement etc., within protection scope of the present invention all should be included within spirit of the present invention and principle.
Claims (12)
1. an electronic chart off-line data method for organizing, is characterized in that, comprising:
Receive the trip path data that client is submitted to;
The trip path data of submitting to according to client, generates electronic map data waiting for transmission;
The electronic map data of generation is transferred to client.
2. method according to claim 1, is characterized in that, the trip path data of submitting to according to client, generates electronic map data waiting for transmission and comprise:
Trip path data is resolved, extract at least one key point in the setting range along the line of walking along the street footpath;
Calculate the coverage of key point;
The coverage of described key point is merged, generate body of a map or chart waiting for transmission;
Using the electronic map data in body of a map or chart waiting for transmission as electronic map data waiting for transmission.
3. method according to claim 1, is characterized in that, the trip path data of submitting to according to client, generates electronic map data waiting for transmission and comprise:
Trip path data is resolved, extract at least one key point in the setting range along the line of walking along the street footpath;
Calculate the coverage of key point;
The electronic chart piecemeal that the coverage of key point is related to is as electronic chart piecemeal waiting for transmission;
Using the set of electronic chart piecemeal waiting for transmission as electronic map data waiting for transmission.
4. according to the method in claim 2 or 3, it is characterized in that, described key point comprises route characteristic key point and periphery feature key points.
5. method according to claim 4, is characterized in that:
Described route characteristic key point is flex point on described trip path or the spaced points of interval the first setpoint distance;
Described periphery feature key points is at a distance of the second setpoint distance and have the information point of feature of setting with described trip path.
6. method according to claim 1, is characterized in that, at the trip path data of submitting to according to client, after generating electronic map data waiting for transmission, also comprises:
Described electronic map data waiting for transmission is compressed.
7. an electronic chart off-line data tissue device, is characterized in that, comprising:
Trip path receiver module, the trip path data of submitting to for receiving client;
Digital map module, for the trip path data of submitting to according to client, generates electronic map data waiting for transmission;
Electronic chart transport module, for transferring to client by the electronic map data of generation.
8. device according to claim 7, is characterized in that, described digital map module comprises:
The first key point extraction unit, for trip path data is resolved, extracts at least one key point in the setting range along the line of walking along the street footpath;
The first coverage computing unit, for calculating the coverage of key point;
Coverage merge cells, for the coverage of described key point is merged, generates body of a map or chart waiting for transmission;
The first digital map unit, for the electronic map data in body of a map or chart waiting for transmission as electronic map data waiting for transmission.
9. device according to claim 7, is characterized in that, described digital map module comprises:
The second key point extraction unit, for trip path data is resolved, extracts at least one key point in the setting range along the line of walking along the street footpath;
The second coverage computing unit, for calculating the coverage of key point;
Piecemeal determining unit, for electronic chart piecemeal that the coverage of key point is related to as electronic chart piecemeal waiting for transmission;
The second digital map unit, for the set using electronic chart piecemeal waiting for transmission as electronic map data waiting for transmission.
10. device according to claim 8 or claim 9, is characterized in that, described key point comprises route characteristic key point and periphery feature key points.
11. devices according to claim 10, is characterized in that:
Described route characteristic key point is flex point on described trip path or the spaced points of interval the first setpoint distance;
Described periphery feature key points is at a distance of the second setpoint distance and have the information point of feature of setting with described trip path.
12. devices according to claim 7, is characterized in that, also comprise:
Data compressing module, for the trip path data submitting to according to client, after generating electronic map data waiting for transmission, compresses described electronic map data waiting for transmission.
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| CN110914777A (en) * | 2016-12-30 | 2020-03-24 | 迪普迈普有限公司 | High-definition map and route storage management system for autonomous vehicle |
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