CN104615604B - A kind of method and device drawn multi-layer image road net data level - Google Patents
A kind of method and device drawn multi-layer image road net data level Download PDFInfo
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- CN104615604B CN104615604B CN201310542368.6A CN201310542368A CN104615604B CN 104615604 B CN104615604 B CN 104615604B CN 201310542368 A CN201310542368 A CN 201310542368A CN 104615604 B CN104615604 B CN 104615604B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/29—Geographical information databases
Abstract
The present invention provides a kind of method and devices drawn multi-layer image road net data level, by carrying out data parsing to map datum, obtain corresponding road net data；It is that the road in road net data sets hierarchical identification based on the connectedness of road intersection in the road net data；Coordinate conversion is carried out to the road net data for being provided with hierarchical identification；According to the hierarchical identification, road network is carried out to the transformed road net data of coordinate and is rendered.So as to handle strategy by rational road net data, it is ensured that even if under complicated road conditions, also can guarantee the accuracy of road network description.
Description
Technical field
The present invention relates to graph processing technique field, it can specifically be related to and a kind of multi-layer image road net data level be drawn
Method and device.
Background technology
In map of navigation electronic field, people draw road network aspect and pursue what is always most paid attention at two aspects,
When the aesthetics that map is drawn, secondly being exactly the accuracy that map is drawn.It is right in people in the actual use of electronic map
Road network draws pursuit of the demand of accuracy even larger than to aesthetics.
At present, multilayer overpass is built in many large- and-medium size cities one after another, therefore weighs road network and draw the important of accuracy
Standard is exactly to draw effect to different layers road correlation.
And existing road network is drawn in flow and method, without considering road interchain（Road i.e. in road net data）Connectedness,
Cause that the disconnected two road of truth can mutually be walked or the transitable two road of truth sheet hinder
It is disconnected.
Moreover, in the prior art, without considering the hierarchical relationship of road interchain, the road for being originally in different layers is caused to be plotted in one
In a plane, the illusion that can mutually be walked to user this road.
It although at present can be by avoiding such illusion in the methods of drafting one-way road arrow on road, in complexity
Crossing, especially thering is surface road to have drawing for parallel overpass and the overhead intersection's gate of multilayer simultaneously, according to can go out
Existing mistake.
The content of the invention
The present invention provides a kind of method and device drawn multi-layer image road net data level, passes through rational road net data
Processing strategy, even if so as to can ensure that the accuracy that in complicated road conditions, also can guarantee road network description.
It is as follows that the embodiment of the present invention provides scheme：
An embodiment of the present invention provides a kind of method drawn multi-layer image road net data level, including：
Data parsing is carried out to map datum, obtains corresponding road net data；
It is that the road in road net data sets hierarchical identification based on the connectedness of road intersection in the road net data；
Coordinate conversion is carried out to the road net data for being provided with hierarchical identification；
According to the hierarchical identification, road network is carried out to the transformed road net data of coordinate and is rendered.
Preferably, the connectedness based on road intersection in the road net data is that the road in road net data is set
Hierarchical identification includes：
If in the road net data between road intersection being connection, to belong to the intersecting section of different roads in road intersection
Point sets identical hierarchical identification；
If being disconnected between road intersection in the road net data, the true hierarchical relationship based on road intersection is
The crossed node for belonging to different roads in road intersection sets different hierarchical identifications.
Preferably, the connectedness based on road intersection in the road net data is that the road in road net data is set
Hierarchical identification includes：
Based on the category of roads of road in the road net data, class letter is set for the road.
Preferably, the connectedness based on road intersection in the road net data is that the road in road net data is set
Hierarchical identification further includes：
By setting frame for road intersection in the road net data, to identify the connectedness of road intersection.
Preferably, it is described according to the hierarchical identification, the transformed road net data of coordinate is carried out road network render including：
Based on the hierarchical identification, the hierarchical relationship of road intersection is determined；
Based on the hierarchical relationship of the road intersection, layering carries out road network and renders.
The embodiment of the present invention additionally provides a kind of device drawn multi-layer image road net data level, including：
Parsing module for carrying out data parsing to map datum, obtains corresponding road net data；
Processing module for the connectedness based on road intersection in the road net data, sets for the road in road net data
Put hierarchical identification；
Modular converter, for carrying out coordinate conversion to the road net data for being provided with hierarchical identification；
Rendering module, for according to the hierarchical identification, carrying out road network to the transformed road net data of coordinate and rendering.
Preferably, if in the road net data between road intersection being connection, the processing module is the phase dealings
Different roads in road set identical hierarchical identification；
If being disconnected between road intersection in the road net data, the processing module is based on the true of road intersection
Hierarchical relationship is that the different roads in road intersection set different hierarchical identifications.
Preferably, the processing module further includes：
For the category of roads based on road in the road net data, grade mark is set for the road for first setting unit
Know.
Preferably, the processing module further includes：
Second setting unit, for by in the road net data road intersection set frame, to identify road intersection
Connectedness.
Preferably, the rendering module includes：
Determination unit for being based on the hierarchical identification, determines the hierarchical relationship of road intersection；
Processing unit, for the hierarchical relationship based on the road intersection, layering carries out road network and renders.
From the above as can be seen that the method provided in an embodiment of the present invention drawn multi-layer image road net data level and
Device by carrying out data parsing to map datum, obtains corresponding road net data；Based on road intersection in the road net data
Connectedness, be road net data in road set hierarchical identification；Coordinate is carried out to the road net data for being provided with hierarchical identification to turn
It changes；According to the hierarchical identification, road network is carried out to the transformed road net data of coordinate and is rendered.So as to pass through rational road net data
Processing strategy, it is ensured that even if under complicated road conditions, also can guarantee the accuracy of road network description.
Description of the drawings
Fig. 1 is that the realization flow of the method provided in an embodiment of the present invention drawn multi-layer image road net data level is illustrated
Figure；
Fig. 2 is the method specific embodiment schematic diagram provided in an embodiment of the present invention drawn multi-layer image road net data level
One；
Fig. 3 is the method specific embodiment schematic diagram provided in an embodiment of the present invention drawn multi-layer image road net data level
Two；
Fig. 4 is the method specific embodiment schematic diagram provided in an embodiment of the present invention drawn multi-layer image road net data level
Three；
Fig. 5 is the method specific embodiment schematic diagram provided in an embodiment of the present invention drawn multi-layer image road net data level
Four；
Fig. 6 is the apparatus structure schematic diagram provided in an embodiment of the present invention drawn multi-layer image road net data level.
Specific embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
Attached drawing, the technical solution of the embodiment of the present invention is clearly and completely drawn.Obviously, the embodiment drawn is this hair
Bright part of the embodiment, instead of all the embodiments.Based on the embodiment of the present invention drawn, ordinary skill
Personnel's all other embodiments obtained on the premise of without creative work, belong to the scope of protection of the invention.
Unless otherwise defined, technical term or scientific terminology used herein should be in fields of the present invention and have
The ordinary meaning that the personage of general technical ability is understood.Used in present patent application specification and claims " the
One ", " second " and similar word are not offered as any order, quantity or importance, and are used only to distinguish different
Component.Equally, the similar word such as "one" or " one " does not indicate that quantity limits yet, but represents that there are at least one.
" connection " either the similar word such as " connected " is not limited to physics or mechanical connection, but can include electrically
Connection, it is either directly or indirect." on ", " under ", "left", "right" etc. are only used for representing relative position relation, work as quilt
After drawing the absolute position change of object, then the relative position relation also correspondingly changes.
An embodiment of the present invention provides a kind of methods drawn multi-layer image road net data level, as shown in Figure 1, the party
Method can specifically include：
Step 11, data parsing is carried out to map datum, obtains corresponding road net data；
Step 12, the connectedness based on road intersection in the road net data is that the road in road net data sets level
Mark；
Step 13, coordinate conversion is carried out to the road net data for being provided with hierarchical identification；
Step 14, according to the hierarchical identification, road network is carried out to the transformed road net data of coordinate and is rendered.
The method drawn multi-layer image road net data level that the embodiments of the present invention provide, passes through scientific and reasonable road
Network data processing strategy, even if so as to can ensure that in complicated road conditions, also can guarantee the accuracy that road network is drawn.
Specifically, the embodiment of the present invention by the above method, be existing road net data is drawn strategy improvement, lead to
Cross data parsing after road net data is arranged, and provide it is collated after coordinate make to the end that renders of navigation software
With so that road network is drawn accurately.
And the technical solution provided in the embodiment of the present invention, before coordinate conversion, to the road net data of parsing acquisition
Being arranged is advantageous in that, can clearly be stated included by it using this road net data to be drawn as an entirety
The connected relation and hierarchical relationship of road, so as to draw out correct road network.
Involved road intersection, is specifically as follows cross one another at least two different roads in the embodiment of the present invention
Road that is, in road net data, includes the different roads of at least one same coordinate point.And intersecting road can reside in it is same
Space layer or different space layers.It specifically can be such as the two road for forming crossroad or T-shaped road junction and such as multiple-layer stand
Road involved by friendship bridge or overpass.
And in the embodiment of the present invention, it is drawn more accurately to make finally to draw the road net data to be formed, it is intersecting to exist
The road of situation is provided with hierarchical identification（level）, for the connectedness and hierarchical relationship between mark road intersection.
In one embodiment, the above-mentioned connectedness based on road intersection in road net data is the road in road net data
Road sets the process of hierarchical identification that can specifically include：
If in road net data between road intersection being connection, the crossed node to belong to different roads in road intersection is set
Put identical hierarchical identification；
If in road net data between road intersection it is disconnected, the true hierarchical relationship based on road intersection, to belong to
The crossed node of different roads sets different hierarchical identifications in road intersection.
I.e. in the embodiment of the present invention, connected relation, road between the path coordinate that includes in existing road net data, road
On the basis of the data messages such as grade, hierarchical identification is additionally arranged for each road in road net data, in favor of follow-up road network wash with watercolours
During dye, the hierarchical identification can be based on, layering carries out road network and renders, so that the navigation map formed after rendering can be more clear
The connection situation and hierarchical relationship of clear statement road intersection.
In addition, in an alternate embodiment of the present invention, the connectedness of road intersection in based on road net data is road network number
It, can also be by setting frame for road intersection in road net data, with mark during road in sets hierarchical identification
The connectedness of road intersection.
If for example, being to connect between road intersection, in the embodiment of the present invention, can will exist positioned at the road on upper strata
The frame of both sides removes at crosspoint, is connection to identify road intersecting herein.If on the contrary, it is not connect between road intersection
Logical, then in the embodiment of the present invention, the frame positioned at road both sides at crosspoint on upper strata can be retained, intersected herein with mark
Road be disconnected.
And in an alternate embodiment of the present invention, the connectedness of road intersection in based on road net data is road net data
In road while hierarchical identification is set, be also based on the category of roads of road in road net data, set for each road
Grade mark, in favor of finally drawing the road net data to be formed（Such as finally formed navigation map）In, pass through different marks
Know, to distinguish the different grades of road such as national highway, provincial highway, highway, user is allow clearly to understand the reality of road
Border situation has used corresponding drive manner and has been applicable in corresponding driving rule.
It is above-mentioned add hierarchical identification for road net data after, the road net data that can will be provided with hierarchical identification carries out coordinate and turns
It changes, and after conversion, according to hierarchical identification, road network is carried out to the transformed road net data of coordinate and is rendered.
Specifically, according to hierarchical identification, the process that road network renders is carried out to the transformed road net data of coordinate and specifically may be used
To include：
Based on hierarchical identification, the hierarchical relationship of road intersection is determined；
Hierarchical relationship based on road intersection, layering carry out road network and render.
For example, when the hierarchical identification difference in intersecting two road, it may be determined that this two road does not connect, then
This visual two road, then can be based on the relation between the hierarchical identification in this two road in different figure layers, such as counts
It is different etc. to be worth of different sizes, identifier, determines the actual hierarchical relationship of this two road intersections, it, can when road network renders
The figure layer being physically located in where the road of lower layer space is rendered in advance, then renders and is physically located in where the road of sheaf space again
Figure.
And when the hierarchical identification of road intersection is identical, it may be determined that connected between this two road, then this two visual
Road is in same figure layer, when road network renders, can carry out road network in same layer and render.
The benefit of this layer rendering is in the system that can reduce the navigation equipment to rendering end place in the embodiment of the present invention
Configuration requirement, the road network that realizing in the case where not influencing navigation equipment corresponding speed, makes navigation equipment draw more beautiful conjunction
Reason.
For the ease of the understanding to technical solution provided in an embodiment of the present invention, below in conjunction with the accompanying drawings, to involved by the present invention
And the specific implementation processes of multiple embodiments stated.
Embodiment one intersects with category of roads but does not connect：
As shown in Figure 2, cited by the embodiment it is two viaducts in city in the crossing of the overhead intersection of multilayer
（D21, D22 in attached drawing 2）It is in different space layers, and is not connected between this two viaducts.
So, in this embodiment, data parsing can be carried out to map datum first, obtain corresponding road net data.
Then, due to not connected between D21 and D22, can be respectively this two viaducts in crossed node
In coordinate information, different hierarchical identifications, such as the hierarchical identification position 1 of the affiliated nodes of D21 be set, and the layer of node described in D22
Grade is identified as 2.
Meanwhile can also frame be set for D21 and D22, due to not connected between D21 and D22, and D21 is located at upper strata sky
Between, D22 is located at lower layer space, i.e. D22 is passed through in the lower section of D21, therefore, retains frames of the D21 at crossed node.
Further, since D21 and D22 is overpass, therefore, corresponding category of roads mark can be identical, and the present invention is real
It applies in example, it can affiliated link be represented with identical color respectively by this two overpass.
After the data preparation that corresponding mark is set is completed, the coordinate conversion of road net data can be carried out, and based on coordinate
Transformed road net data, is rendered.
Due in this embodiment, D21 and D22 the hierarchical identification of affiliated crossed node and is differed respectively, and rule in advance
The relation that calibration knows between 1,2 be 1 it is upper, 2 under, then in this embodiment, figure layer where can first carrying out D22 renders,
Then figure layer where carrying out D21 again renders, and ultimately forms road network pattern as shown in Figure 2.
Embodiment two, the road of different category of roads intersect and connect：
As shown in Figure 3, two cited by the embodiment are intersecting and the road of connection, wherein, D31 is viaduct, D32
For the category of roads difference of ordinary municipal road, i.e. two road.
Since D31 is connected with D32, in the coordinate information of two road crossed node, hierarchical identification can be identical.
And since D31 is connected with D32, the physical location of D31 is located at the upper sheaf space of D32, it therefore, can will be described in D31
Frame removal at crossed node, is connected with identifying D31 with D32.
Further, since D31 is different from the category of roads of D32, can difference be shown by different frames.It specifically can be such as attached drawing
Shown in 3.
So when road network renders, due to hierarchical identification phase in the coordinate information of D31 and D32 two road crossed node
Together, therefore, the road network that two road can be carried out in same layer renders, and ultimately forms the road network pattern as described in attached drawing 3.
Embodiment three, it is a plurality of difference category of roads road between can pass through：
For road that is different in a plurality of category of roads of the same space layer and being connected, as shown in Figure 4, can specifically include
Highway D41, provincial highway D42 and with that for being connected the ordinary road D43 of the D42 of D41, in the embodiment of the present invention, can be then
Identical hierarchical identification is set in the attribute of above-mentioned road, and with different frames（It can also be color）To show category of roads
Difference, when road network renders, can be rendered with layer, form road network pattern as shown in Figure 4.
Example IV, same link grade are walked（It is intersecting）But it does not connect：
Such case has more ring road that is existing and crossing in a plurality of highway, as shown in Figure 5, one of highway D5
Point（D51 parts）It is passed through under highway D6, and another part（D53 parts）It is passed through on D6.
It, can be by the layer in the coordinate information of two crossed nodes belonging to D51 and D6 difference so in the embodiment of the present invention
Grade mark is arranged to different numerical value or symbol, is that mark D51 intersects with D6 but do not connect（Can be additionally used in identify D51 D6 it
Under）.Meanwhile also the hierarchical identification in D53 and the D6 respectively coordinate information of affiliated two crossed nodes can be arranged to difference
Numerical value or symbol, be mark D53 intersect with D6 but do not connect（It can also be used to identify D53 on D6）.
So when road network renders, the road network of figure layer renders where can first carrying out D51, figure layer where then carrying out D6 again
It renders, figure layer renders where finally carrying out D53.
Since section D52 is only connected with section D51 and D53, but it is non-intersect with D6, and therefore, section D52 can be with section D51
Or section D53 is rendered with layer, can also be rendered with D6 with layer.
The statement of above example is as can be seen that the side that multi-layer image road net data level provided in an embodiment of the present invention is drawn
Method can clearly, accurately draw out complicated road net data.
The embodiment of the present invention additionally provides a kind of device drawn multi-layer image road net data level, as shown in Figure 6, should
Device can specifically include：
Parsing module 61 for carrying out data parsing to map datum, obtains corresponding road net data；
Processing module 62 is the road in road net data for the connectedness based on road intersection in the road net data
Hierarchical identification is set；
Modular converter 63, for carrying out coordinate conversion to the road net data for being provided with hierarchical identification；
Rendering module 64, for according to the hierarchical identification, carrying out road network to the transformed road net data of coordinate and rendering.
The device drawn multi-layer image road net data level that the embodiments of the present invention provide, passes through scientific and reasonable road
Network data processing strategy, even if so as to can ensure that in complicated road conditions, also can guarantee the accuracy that road network is drawn.
In an alternate embodiment of the present invention, if being connection between road intersection in road net data, processing module 62 is
The crossed node for belonging to different roads in road intersection sets identical hierarchical identification；
If being disconnected between road intersection in road net data, true level of the processing module 62 based on road intersection is closed
System, the crossed node to belong to different roads in road intersection set different hierarchical identifications.
In an alternate embodiment of the present invention, processing module 62 can also specifically include：
For the category of roads based on road in the road net data, grade mark is set for the road for first setting unit
Know.
In an alternate embodiment of the present invention, processing module 62 can also specifically include：
Second setting unit, for by in the road net data road intersection set frame, to identify road intersection
Connectedness.
In an alternate embodiment of the present invention, rendering module 64 can specifically include：
Determination unit for being based on the hierarchical identification, determines the hierarchical relationship of road intersection；
Processing unit, for the hierarchical relationship based on the road intersection, layering carries out road network and renders.
From the above as can be seen that the method provided in an embodiment of the present invention drawn multi-layer image road net data level and
Device by carrying out data parsing to map datum, obtains corresponding road net data；Based on road intersection in the road net data
Connectedness, be road net data in road set hierarchical identification；Coordinate is carried out to the road net data for being provided with hierarchical identification to turn
It changes；According to the hierarchical identification, road network is carried out to the transformed road net data of coordinate and is rendered.So as to pass through scientific and reasonable road network
Data processing policy, it is ensured that even if under complicated road conditions, also can guarantee the accuracy that road network is drawn.
The above is only embodiments of the present invention, it is noted that is come for those skilled in the art
It says, without departing from the principle of the present invention, several improvements and modifications can also be made, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (8)
- A kind of 1. method drawn multi-layer image road net data level, which is characterized in that including：Data parsing is carried out to map datum, obtains corresponding road net data；It is that the road in road net data sets hierarchical identification based on the connectedness of road intersection in the road net data；Coordinate conversion is carried out to the road net data for being provided with hierarchical identification；According to the hierarchical identification, road network is carried out to the transformed road net data of coordinate and is rendered；The connectedness based on road intersection in the road net data is that the road in road net data sets hierarchical identification bag It includes：If in the road net data between road intersection being connection, the crossed node to belong to different roads in road intersection is set Put identical hierarchical identification；If in the road net data between road intersection it is disconnected, the true hierarchical relationship based on road intersection, to belong to The crossed node of different roads sets different hierarchical identifications in road intersection.
- 2. the method as described in claim 1, which is characterized in that the method road intersection in based on the road net data Connectedness during being the road setting hierarchical identification in road net data, further includes：Based on the category of roads of road in the road net data, class letter is set for the road.
- 3. the method as described in claim 1, which is characterized in that the method road intersection in based on the road net data Connectedness during being the road setting hierarchical identification in road net data, further includes：By setting frame for road intersection in the road net data, to identify the connectedness of road intersection.
- 4. the method as described in claim 1, which is characterized in that it is described according to the hierarchical identification, to the transformed road of coordinate Network data carry out road network render including：Based on the hierarchical identification, the hierarchical relationship of road intersection is determined；Based on the hierarchical relationship of the road intersection, layering carries out road network and renders.
- 5. a kind of device drawn multi-layer image road net data level, which is characterized in that including：Parsing module for carrying out data parsing to map datum, obtains corresponding road net data；Processing module is that the road in road net data sets layer for the connectedness based on road intersection in the road net data Grade mark, wherein, if in the road net data between road intersection being connection, the processing module is in the road intersection Different roads identical hierarchical identification is set；If in the road net data between road intersection it is disconnected, the processing True hierarchical relationship of the module based on road intersection is that the different roads in road intersection set different hierarchical identifications；Modular converter, for carrying out coordinate conversion to the road net data for being provided with hierarchical identification；Rendering module, for according to the hierarchical identification, carrying out road network to the transformed road net data of coordinate and rendering.
- 6. device as claimed in claim 5, which is characterized in that the processing module further includes：For the category of roads based on road in the road net data, class letter is set for the road for first setting unit.
- 7. device as claimed in claim 5, which is characterized in that the processing module further includes：Second setting unit, for by in the road net data road intersection set frame, to identify the company of road intersection The general character.
- 8. device as claimed in claim 5, which is characterized in that the rendering module includes：Determination unit for being based on the hierarchical identification, determines the hierarchical relationship of road intersection；Processing unit, for the hierarchical relationship based on the road intersection, layering carries out road network and renders.
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| CN106980633B (en) * | 2016-01-19 | 2020-12-15 | 阿里巴巴（中国）有限公司 | Indoor map data generation method and device |
| CN108806472B (en) * | 2017-05-03 | 2021-05-28 | 腾讯科技（深圳）有限公司 | Road rendering method and device in electronic map, and processing method and device |
| CN107591080B (en) * | 2017-08-31 | 2020-05-26 | 城市生活（北京）资讯有限公司 | Method and device for drawing road gland relation |
| CN108981743B (en) * | 2018-08-15 | 2020-08-25 | 百度国际科技（深圳）有限公司 | Navigation chart drawing method, device and equipment |
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