CN103196455B - The display method of road name, device, server and system - Google Patents
The display method of road name, device, server and system Download PDFInfo
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- CN103196455B CN103196455B CN201210004868.XA CN201210004868A CN103196455B CN 103196455 B CN103196455 B CN 103196455B CN 201210004868 A CN201210004868 A CN 201210004868A CN 103196455 B CN103196455 B CN 103196455B
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Abstract
The present invention discloses and a kind of shows the method for road name, device, server and system, relates to electronic map field, for solving to show that the computationally intensive technical problem of road name is invented in prior art.Described method includes: obtain road to be shown in the region to be shown of electronic chart；Search the road name that described road is corresponding；Search corresponding the showing guides of described road, described in show guides the lines generated in advance the track of described road being carried out round and smooth process；Show guides described in Yan the described road name of display.The present invention can accelerate to show the speed of road name.
Description
Technical field
The present invention relates to electronic map field, particularly relate to a kind of show the method for road name, device, clothes
Business device and system.
Background technology
During the drawing of navigation map, can greatly promote along road Dynamic Announce road name and draw map
Aesthetic property.In prior art, the method along road Dynamic Announce road name is: according to road shape, calculates
Position that Road name shows and angles of display, thus draw.Navigator is entered by road shape
Row calculates, and obtains the coordinate of the display position of road name.In Fig. 1, road shape is (in Fig. 1
Lines) it is made up of a series of point range (each point as in Fig. 1).Road name " Nanjing Road East " four
The position of individual word is to calculate gained according to corresponding road shape.Fig. 1 is the shape in prior art according to road
One schematic diagram of shape display road name；Fig. 2 is the partial shape display road in prior art according to road
Another schematic diagram of title；Fig. 3 be in prior art according to road shape display road name another show
It is intended to.
In the manufacturing process of real data, in order to express the change of road shape so that road shape more pastes
Cutting the road of reality, road point range is the most intensive.Hence in so that navigator calculates the display mode of road name
Amount of calculation very big, calculate more complicated, the efficiency of impact display.
Summary of the invention
The technical problem to be solved in the present invention is to provide and a kind of shows the method for road name, device, server
And system, it is possible to reduce the amount of calculation of the display mode calculating road name.
For solving above-mentioned technical problem, embodiments of the invention provide technical scheme as follows:
On the one hand, it is provided that a kind of method showing road name, including:
Obtain road to be shown in the region to be shown of electronic chart；
Search the road name that described road is corresponding；
Search corresponding the showing guides of described road, described in show guides as rail to described road in advance
The lines that mark carries out round and smooth process and generates；
Show guides described in Yan the described road name of display.
The step showed guides that the described road of described lookup is corresponding particularly as follows:
Search the characteristic point showed guides that described road is corresponding；
Generate according to the described characteristic point showed guides and show guides.
Show guides described in described edge show described road name step particularly as follows:
Judge whether the region to be shown of described electronic chart comprises whole tracks of described road；
If YES, then along described in whole tracks of showing guides show described road name；
If NO, then obtain and there is the partial traces showed guides described in common factor in described region to be shown；
The partial traces showed guides described in Yan shows described road name.
The partial traces showed guides described in described edge shows that the step of described road name includes:
Obtain the character quantity of described road name；
According to described character quantity, the described described partial traces showed guides averagely is divided, generate each
Individual sub-partial traces；
By each described subdivision track respectively with each character one_to_one corresponding in described road name；
According to the position of subdivision track each described, determine each described CSD；
According to the direction of each subdivision track described, determine the display direction of each described character.
Before the step of road to be shown in the region to be shown of described acquisition electronic chart, described method bag
Include:
Corresponding relation between obtaining described road and showing guides.
Described road and the corresponding relation between showing guides generate according to following steps:
Obtain a road；
According to the track of described road, the track of described road being carried out round and smooth process, generation shows guides；
Preserve described road and described show guides between corresponding relation.
The described road of described preservation and described show guides between the step of corresponding relation include:
The characteristic point showed guides described in extraction；
Preserve the corresponding relation between described road and the described characteristic point showed guides.
When described showing guides as line segment, described in the characteristic point that shows guides be at least 2；
When described showing guides as curve, described in the characteristic point that shows guides be at least 3.
On the other hand, it is provided that a kind of device showing road name, including:
Acquiring unit, obtains road to be shown in the region to be shown of electronic chart；
First searches unit, searches the road name that described road is corresponding；
Second search unit, search corresponding the showing guides of described road, described in show guides as in advance
The lines track of described road being carried out round and smooth process and generate；
Display unit, along described in show guides display described road name.
Described second searches unit includes:
Search subelement, search the characteristic point showed guides that described road is corresponding；
Generate subelement, generate according to the described characteristic point showed guides and show guides.
On the other hand, it is provided that a kind of server, it is characterised in that including:
Acquiring unit, obtains a road；
Signal generating unit, according to the track of described road, carries out round and smooth process, generates display auxiliary described road
Index contour；
Storage unit, preserve described road and described show guides between corresponding relation,
Transmitting element, send described road and described show guides between corresponding relation.
Described storage unit includes:
Extract subelement, the characteristic point showed guides described in extraction；
Preserve subelement, preserve the corresponding relation between described road and the described characteristic point showed guides.
On the other hand, it is provided that a kind of system showing road name, including: server and display road name
Device；
The device of described display road name, receive described road and described show guides between corresponding pass
System；Obtain road to be shown in the region to be shown of electronic chart；Search the link name that described road is corresponding
Claim；Search corresponding the showing guides of described road, described in show guides as rail to described road in advance
The lines that mark carries out round and smooth process and generates；Show guides described in Yan the described road name of display；
Described server, obtains a road；According to the track of described road, described road is carried out round and smooth place
Reason, generation shows guides；Preserve described road and described show guides between corresponding relation；Send out
Send described road and described show guides between corresponding relation.
Embodiments of the invention have the advantages that
In such scheme, when calculating the display mode of road name of road to be shown, search described road
Corresponding the showing guides in road, described in show guides as in advance the track of described road being carried out round and smooth process
And the lines generated；Show guides described in Yan the described road name of display.Owing to described lines are rule line
Bar, calculates the display mode of road name compared to true form according to road in prior art, calculates
Quantitative change obtains simply.
Accompanying drawing explanation
Fig. 1 is a schematic diagram of the shape display road name in prior art according to road；
Fig. 2 is another schematic diagram of the partial shape display road name in prior art according to road；
Fig. 3 is another schematic diagram of the shape display road name in prior art according to road；
Fig. 4 is the schematic flow sheet of the method for display road name of the present invention；
Fig. 5 is the flow process signal of generation road of the present invention and the corresponding relation between showing guides
Figure；
Fig. 6 is a schematic diagram of the shape display road name in the present invention according to road；
Fig. 7 is another schematic diagram of the shape display road name in the present invention according to road；
Fig. 8 is the structural representation of the device of display road name of the present invention；
Fig. 9 is the structural representation of server of the present invention；
Figure 10 is the structural representation of the system of display road name of the present invention；
Figure 11 is the schematic flow sheet of the application scenarios of the method for display road name of the present invention；
Figure 12 is the flow process of the method generating the characteristic point showed guides in application scenarios of the present invention
Schematic diagram；
Figure 13 is that in application scenarios of the present invention, navigator realizes along road Dynamic Announce road name
The schematic flow sheet of method；
Figure 14 is the schematic diagram of the storage organization showed guides in application scenarios of the present invention.
Detailed description of the invention
For making embodiments of the invention solve the technical problem that, technical scheme and advantage clearer, under
Face will be described in detail in conjunction with the drawings and the specific embodiments.
As shown in Figure 4, for the method for display road name of the present invention, including:
Step 11, obtains road to be shown in the region to be shown of electronic chart；Such as, in Fig. 6,
Road to be shown be No. ID be 11 road.
Step 12, searches the road name that described road is corresponding；This step is particularly as follows: according to prestoring
At local road ID and the corresponding relation of road name, search the road name that described road is corresponding；Also
Can be, according to being stored in advance in road ID and the corresponding relation of road name of server, in real time from clothes
Business device obtains the road name that described road is corresponding.Such as, in Fig. 6, the road name of road to be shown
For " East Zhongshan Road ".
Step 13, searches corresponding the showing guides of described road, described in show guides as in advance to institute
The track stating road carries out round and smooth process and the lines that generate；This step is particularly as follows: according to being stored in advance in this
The road ID on ground and the corresponding relation showed guides, search corresponding the showing guides of described road；Also
Can be, according to the road ID being stored in advance in server and the corresponding relation that shows guides, in real time from
Server obtains corresponding the showing guides of described road.Such as, in Fig. 6, the display of road to be shown
Boost line is lines 12.
Step 14, along described in show guides display described road name.Such as, in Fig. 6, along described
Show guides " lines 12 " show described road name " East Zhongshan Road " ".Display compared to Fig. 1
Method is simpler than the true form of road owing to showing guides, it is possible to reduce the display calculating road name title
The amount of calculation of mode.
Optionally, before step 11, described method also includes:
Step 10, the corresponding relation between obtaining described road and showing guides, and obtain described road
Corresponding relation between road and road name.It will be understood by those skilled in the art that and can also obtain in real time from server
Take.Showing guides of the present invention can be straight line, it is also possible to for regular curve, such as, camber line lines etc.
Deng.
Wherein, step 13 particularly as follows:
Step 131, searches the characteristic point showed guides that described road is corresponding；Such as, in Fig. 6, aobvious
The characteristic point showing boost line is: A1, A2, A3.Display road true form point be classified as B1, B2,
B3 etc..
Step 132, generates according to the described characteristic point showed guides and shows guides.Such as, in Fig. 6,
Generate according to the described characteristic point " A1, A2, A3 " showed guides and show guides " lines 12 ".
Step 14 particularly as follows:
Step 141, it is judged that whether comprise whole rails of described road in the region to be shown of described electronic chart
Mark；Such as, Fig. 6 contains in the region to be shown of electronic chart whole tracks of road；Electricity in Fig. 7
The region to be shown of sub-map contains the partial traces of road.
Step 142, if YES, then the whole tracks showed guides described in edge show described road name；
Such as, in Fig. 6, the whole tracks showed guides described in edge show described road name " East Zhongshan Road ".
Step 143, if NO, then obtains to have described in common factor with described region to be shown and shows guides
Partial traces；The partial traces showed guides described in Yan shows described road name.Such as, Fig. 7
In, show described road name " East Zhongshan Road " along the track showed guides in region to be shown.
The whole tracks showed guides described in described edge show that the step of described road name includes:
Step 142A, obtains the character quantity of described road name；
The described described whole tracks showed guides, according to described character quantity, are averagely drawn by step 142B
Point, generate the whole track of each height；
Step 142C, by each whole track of described son respectively with each character in described road name one by one
Corresponding；
Step 142D, according to the position of the whole track of son each described, determines the aobvious of each described character
Show position；This step is particularly as follows: with the end points (head-end or tail point) of the whole track of every height as reference
Point, shows each described character.
Step 142E, according to the direction of the described whole track of each height, determines the display side of each described character
To.Particularly as follows: according to the curve near tangent direction of the whole track of described son, determine the aobvious of each described character
Show direction.
The partial traces showed guides described in described edge shows that the step of described road name includes:
Step 143A, obtains the character quantity of described road name；
Step 143B, according to described character quantity, averagely draws the described described partial traces showed guides
Point, generate each subdivision track；
Step 143C, by each described subdivision track respectively with each character in described road name one by one
Corresponding；
Step 143D, according to the position of subdivision track each described, determines the aobvious of each described character
Show position；This step is particularly as follows: with the end points (head-end or tail point) of each subdivision track as reference
Point, shows each described character.
Step 143E, according to the direction of each subdivision track described, determines the display side of each described character
To.Particularly as follows: according to the curve near tangent direction of described subdivision track, determine the aobvious of each described character
Show direction.
As it is shown in figure 5, described road and the corresponding relation between showing guides generate according to following steps:
Step 21, obtains a road；Such as, in Fig. 6, obtaining ID is the road of 11.
Step 22, according to the track of described road, carries out round and smooth process to the track of described road, generates
Show guides；Such as, in Fig. 6, generate and show guides 12.
Step 23, preserve described road and described show guides between corresponding relation.
Step 23 includes:
Step 231, the characteristic point showed guides described in extraction；Such as, in Fig. 6, show guides 12
Characteristic point be A1, A2, A3.Described display characteristic point includes at least two end points, represents aobvious respectively
Show the beginning and end of boost line.
Step 232, preserves the corresponding relation between described road and the described characteristic point showed guides.
When described showing guides as line segment, described in the characteristic point that shows guides be at least 2；
When described showing guides as curve, described in the characteristic point that shows guides be at least 3.For
Complicated curve, the characteristic point showed guides is 5 or more.
As shown in Figure 8, for a kind of device showing road name of the present invention, including:
Acquiring unit 31, obtains road to be shown in the region to be shown of electronic chart；
First searches unit 32, searches the road name that described road is corresponding；
Second search unit 33, search corresponding the showing guides of described road, described in show guides into
The lines in advance track of described road being carried out round and smooth process and generate；
Display unit 34, along described in show guides display described road name.
Described second searches unit includes:
Search subelement, search the characteristic point showed guides that described road is corresponding；
Generate subelement, generate according to the described characteristic point showed guides and show guides.
As it is shown in figure 9, be a kind of server of the present invention, including:
Acquiring unit 41, obtains a road；
Signal generating unit 42, according to the track of described road, carries out round and smooth process to described road, generates aobvious
Show boost line；
Storage unit 43, preserve described road and described show guides between corresponding relation,
Transmitting element 44, send described road and described show guides between corresponding relation.
Described storage unit 43 includes:
Extract subelement, the characteristic point showed guides described in extraction；
Preserve subelement, preserve the corresponding relation between described road and the described characteristic point showed guides.
As shown in Figure 10, for a kind of system showing road name of the present invention, including: server
51 and display road name device 52；
The device 52 of described display road name, receive described road and described show guides between right
Should be related to；Obtain road to be shown in the region to be shown of electronic chart；Search the road that described road is corresponding
Road title；Search corresponding the showing guides of described road, described in show guides as in advance to described road
Track carry out round and smooth process and the lines that generate；Show guides described in Yan the described road name of display；
Described server 51, obtains a road；According to the track of described road, described road is justified
Sliding process, generation shows guides；Preserve described road and described show guides between corresponding relation；
Send described road and described show guides between corresponding relation.
The device of heretofore described display road name can be computer, PAD (personal digital assistant),
The terminals such as mobile phone.The characteristic point showed guides in the present invention can be by it in electronic chart
Coordinate carrys out record.
Invention increases data production link and data compilation link, data production link manufacture
Road title shows guides, and the road name produced is showed guides storage to physical store by data compilation
In the data of form, navigator shows guides Dynamic Announce road name according to the road name of storage.
As shown in figure 11, the method for the display road name of the application scenarios of the present invention includes:
(1) first, for data production link, showing guides of road name is made.
Traditional mode is all to carry out real-time implementation in navigation application end, but navigation application apparatus is all embedded
Machine, real-time computational valid time rate is the lowest, directly reduces Consumer's Experience.The present invention is by main amount of calculation
Being placed on when data produce and complete, it is all to carry out on the server that data produce, and navigation application only need to use production
Good data, by the characteristic point of curve also virgin curve (showing guides), thus bring carrying in efficiency
Rise.
As shown in figure 12, for the method generating road name auxiliary display curve:
First read the initial data of road shape；
Extraction road shape and road name data；
According to road shape data genaration smooth curve, as road name auxiliary display curve；
Then, smooth curve characteristic point is stored together with road name as road name attribute.
Road shape generates the method that smooth curve can use ready-made technology, such as Linear Iterative Method, segmentation three
Preserving Interpolation Using method, B-spline method.So can reduce labor workload.Those skilled in the art it will be appreciated that
This process can also have artificial participation.
(2) data compilation link
Data compilation link is to connect data to produce and navigation application, and the data that only data are produced turn
Change () physical storage format into, just can be supplied to navigation application and use.Road name shows guides conduct
A kind of new attribute of road name, needs in the structure of its storage defined in physical storage format.Therefore data
Compiling link needs the structure defining the storage in detail that road name shows guides for navigator.Right
Answer storage organization as shown in figure 14.Wherein, AuxiliaryLine is the genus showed guides of road name
Property structure；The quantity of NumPoints recording curve characteristic point；The coordinate of PointsList recording curve characteristic point.
(3) navigation application link
Navigation application is directly for user, and efficiency, attractive in appearance and accuracy all must be taken into account.Therefore need to
The work to calculate in a large number is placed on data production aspect and completes.As shown in figure 13, navigation application directly reads
Corresponding data, do simple calculating, it is achieved along road Dynamic Announce road name.
The present invention proposes a new method along road Dynamic Announce road name, real road is carried out round and smooth,
Taking out dilute process, the smooth curve after processing stores together as road attribute, thus avoid and is navigating through
Journey carries out a large amount of geometric operation, thus is effectively improved display efficiency, and solve for complicated road
The accuracy problem of display position.
The curvilinear characteristic point of road name auxiliary display is stored by the present invention as road name attribute, replaces existing
There is the storage mode of technology middle conductor point range, reduce amount of storage.Improve navigation setting along road Dynamic Announce
The efficiency of road name, and improve position and the accuracy of the anglec of rotation of display road name.First the present invention exists
The data genaration stage calculates road name by road true form and shows guides, relative to the actual shape of road
Shape, show guides done the biggest take out uncommon.Then, data compilation is by the generated work that shows guides
Store in the data of physical storage format (PSF) for road name attribute, navigation setting is according to storage
Show guides as the boost line along road display road name, show guides and compare more original road shape
Line, shape point has done take out uncommon, the ratio simple shape of original road, reduce display time real-time amount of calculation,
It is higher along treatment effeciency during the DYNAMIC DISTRIBUTION road name of road,
In prior art, owing in reality, the shape of road is ever-changing, the name display position, road calculated
And angle is often bigger with the overall deviating from course of road.Such as, Fig. 1 when changing to Fig. 2, " middle mountain
East Road " angles of display of four words is the most inconsistent.In Fig. 3, the angle of " road " word and the entirety of road
Deviating from course is bigger.
In the present invention, generate the overall trend that can consider road when showing guides.Such as Fig. 6 and Fig. 7
Addition shows guides, and continuously, the angle of rotation is more continuous in the display change of " East Zhongshan Road " four words,
The sensation producing jump will not be moved by screen when navigation.
The above is the preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, on the premise of without departing from principle of the present invention, it is also possible to make some improvements and modifications,
These improvements and modifications also should be regarded as protection scope of the present invention.
Claims (12)
1. the method showing road name, it is characterised in that including:
Obtain road to be shown in the region to be shown of electronic chart；
Search the road name that described road is corresponding；
Search corresponding the showing guides of described road, described in show guides as rail to described road in advance
The lines that mark carries out round and smooth process and generates；
Show guides described in Yan the described road name of display；
Show guides described in described edge show described road name step particularly as follows:
Judge whether the region to be shown of described electronic chart comprises whole tracks of described road；
If YES, then along described in whole tracks of showing guides show described road name；
If NO, then obtain and there is the partial traces showed guides described in common factor in described region to be shown；
The partial traces showed guides described in Yan shows described road name.
The method of display road name the most according to claim 1, it is characterised in that described lookup
The step showed guides that described road is corresponding particularly as follows:
Search the characteristic point showed guides that described road is corresponding；
Generate according to the described characteristic point showed guides and show guides.
The method of display road name the most according to claim 1, it is characterised in that described along institute
State the partial traces showed guides and show that the step of described road name includes:
Obtain the character quantity of described road name；
According to described character quantity, the described described partial traces showed guides averagely is divided, generate each
Individual sub-partial traces；
By each described subdivision track respectively with each character one_to_one corresponding in described road name；
According to the position of subdivision track each described, determine each described CSD；
According to the direction of each subdivision track described, determine the display direction of each described character.
The method of display road name the most according to claim 1, it is characterised in that described acquisition
Before the step of road to be shown in the region to be shown of electronic chart, described method includes:
Corresponding relation between obtaining described road and showing guides.
The method of display road name the most according to claim 4, it is characterised in that described road
With the corresponding relation between showing guides generates according to following steps:
Obtain a road；
According to the track of described road, the track of described road being carried out round and smooth process, generation shows guides；
Preserve described road and described show guides between corresponding relation.
The method of display road name the most according to claim 5, it is characterised in that described preservation
Described road and described show guides between the step of corresponding relation include:
The characteristic point showed guides described in extraction；
Preserve the corresponding relation between described road and the described characteristic point showed guides.
The method of display road name the most according to claim 6, it is characterised in that
When described showing guides as line segment, described in the characteristic point that shows guides be at least 2；
When described showing guides as curve, described in the characteristic point that shows guides be at least 3.
8. the device showing road name, it is characterised in that described device utilizes claim 1 institute
The method stated realizes road name and shows；
Described device includes:
Acquiring unit, obtains road to be shown in the region to be shown of electronic chart；
First searches unit, searches the road name that described road is corresponding；
Second search unit, search corresponding the showing guides of described road, described in show guides as in advance
The lines track of described road being carried out round and smooth process and generate；
Display unit, along described in show guides display described road name.
The device of display road name the most according to claim 8, it is characterised in that described second
Lookup unit includes:
Search subelement, search the characteristic point showed guides that described road is corresponding；
Generate subelement, generate according to the described characteristic point showed guides and show guides.
10. a server, it is characterised in that the method described in described server by utilizing claim 1 is real
Existing road name shows；
Described server includes:
Acquiring unit, obtains a road；
Signal generating unit, according to the track of described road, carries out round and smooth process, generates display auxiliary described road
Index contour；
Storage unit, preserve described road and described show guides between corresponding relation,
Transmitting element, send described road and described show guides between corresponding relation.
11. servers according to claim 10, it is characterised in that described storage unit includes:
Extract subelement, the characteristic point showed guides described in extraction；
Preserve subelement, preserve the corresponding relation between described road and the described characteristic point showed guides.
12. 1 kinds of systems showing road name, it is characterised in that described system utilizes claim 1
Described method realizes road name and shows；
Described system includes: server and the device of display road name；
The device of described display road name, receive described road and described show guides between corresponding pass
System；Obtain road to be shown in the region to be shown of electronic chart；Search the link name that described road is corresponding
Claim；Search corresponding the showing guides of described road, described in show guides as rail to described road in advance
The lines that mark carries out round and smooth process and generates；Show guides described in Yan the described road name of display；
Described server, obtains a road；According to the track of described road, described road is carried out round and smooth place
Reason, generation shows guides；Preserve described road and described show guides between corresponding relation；Send out
Send described road and described show guides between corresponding relation.
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| US10726598B2 (en) * | 2016-05-19 | 2020-07-28 | Toyota Jidosha Kabushiki Kaisha | Map display system and map display program |
| CN113390425B (en) * | 2020-03-13 | 2023-11-21 | 北京四维图新科技股份有限公司 | Map data processing method, device, equipment and storage medium |
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| CN101290725A (en) * | 2007-04-17 | 2008-10-22 | 株式会社日立制作所 | Digital road map generation system and map generation method |
| CN201438337U (en) * | 2009-06-04 | 2010-04-14 | 远鼎股份有限公司 | Road coordinate structure |
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