CN106409129A - Road condition drawing method and road condition drawing device - Google Patents
Road condition drawing method and road condition drawing device Download PDFInfo
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- CN106409129A CN106409129A CN201611090102.2A CN201611090102A CN106409129A CN 106409129 A CN106409129 A CN 106409129A CN 201611090102 A CN201611090102 A CN 201611090102A CN 106409129 A CN106409129 A CN 106409129A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B29/00—Maps; Plans; Charts; Diagrams, e.g. route diagram
- G09B29/003—Maps
- G09B29/006—Representation of non-cartographic information on maps, e.g. population distribution, wind direction, radiation levels, air and sea routes
- G09B29/007—Representation of non-cartographic information on maps, e.g. population distribution, wind direction, radiation levels, air and sea routes using computer methods
Abstract
The invention discloses a road condition drawing method and a road condition drawing device. The problem that a drawn road is not as smooth as the actual road and there are blunt bifurcates at the joints of different road sections in the prior art can be solved. The method comprises the following steps: S1, acquiring the GIS data of a whole section of road to be drawn, extracting the latitudes and longitudes of the interior points of the whole section of road, and projecting the interior points to a display region according to the latitudes and longitudes of the interior points; S2, if judging and knowing that the whole section of road is a one-way road and continuously and reversely changes in a short distance, repairing the interior points of the whole section of road by use of a quadratic Bessel equation, and generating exterior points based on the interior points of the whole section of road; S3, processing the interior points and the exterior points by use of PATH in the programming language to get a road model, and drawing a road contour in the display region based on the road model; and S4, performing road condition drawing and road node name drawing on the road contour.
Description
Technical field
The present invention relates to survey field is and in particular to a kind of road conditions method for drafting and device.
Background technology
With the made rapid progress of global Surveying Engineering, GIS information is obtained for point-device data supporting in the whole world, with
Even more a hundred flowers blossom for road ways of presentation based on GIS data, and cartographic information has even more been accomplished ultimate attainment by Ge Jia technology company.
Such as, Google Maps refines to Back ground Information, there is provided comprehensive and detailed map guides, and arrives greatly the version in any one continent
Figure all can be received to the greatest extent in eye, and the little direction to certain building house all marks without the slightest error.
In recent years, Cartographic Technique had been accepted extensively by people and had used, because it is just met for the spy to the world for the people
Rope and craving for.But thing no hundred is good, and people is no same, everyone more or less has opinion and the demand of oneself in using.Such as exist
During using navigating, or being when checking highway or urban road, being more desirable to obtain a kind of more abstract sketch, remove
The strong information of interference around road, knows the basic configuration of road and the traffic information of road at a glance.This figure
With road likeness in form but nisi accurate, information is more simple, directly perceived and prominent.
User with Baidu as representative, is now the drafting scheme of former data straight line connection using extensive scheme, that is, is based on
A series of coordinate informations based on longitude and latitude that existing GIS data provides for road, and road node data, these are counted
According to being converted into two-dimensional plane coordinate, reuse the development language of each platform, plane coordinates point is joined end to end one by one, then with overstriking
The form of line forms road pattern.After the GIS data collection of this scheme, typically through smoking dilute process, so road
Data is on the low side, is directly connected to cause road shape stiff strange.It is illustrated in figure 1 the road figure (right figure) that this scheme obtains
With the schematic diagram of real road figure (left figure) it can be seen that the road that this scheme obtains is not so good as real road smooths and actual
Road has larger discrepancy in prototype.And for drawing road conditions, this scheme difference road conditions is all using different line segments even
Connect, junction can have a factitious bifurcated, final attractive in appearance of impact.It is illustrated in figure 2 the connection diagram of different road conditions sections,
As can be seen that the junction of different road conditions sections occurs in that stiff bifurcated in Fig. 2.
Content of the invention
In view of the shortcomings of the prior art and defect, the present invention provides a kind of road conditions method for drafting and device.
On the one hand, the embodiment of the present invention proposes a kind of road conditions method for drafting, including：
S1, obtain the GIS data of whole section of road to be drawn, extract the longitude of interior point and the latitude of described whole section of road,
And described interior point is projected viewing area by the longitude according to described interior point and latitude；
If S2 judge to know described whole section of road as one-way road and in short distance continuous inverse change, using two
Secondary Bessel equation is to point in described whole section of road benefit, and generates exterior point based on the interior point of described whole section of road；
S3, using the PATH in programming language, described interior point and exterior point are processed, obtain road model, and described
It is based on described road model in viewing area and draw road profile；
S4, described road profile is carried out with road conditions drafting and road nodename draw.
On the other hand, the embodiment of the present invention proposes a kind of road conditions drawing apparatus, including：
Projecting unit, for obtaining the GIS data of whole section of road to be drawn, extracts the warp of the interior point of described whole section of road
Degree and latitude, and described interior point is projected viewing area by the longitude according to described interior point and latitude；
Signal generating unit, if for judging to know that described whole section of road continuously reversely become as one-way road and in short distance
Change, then using secondary Bessel equation to point in described whole section of road benefit, and exterior point is generated based on the interior point of described whole section of road；
First drawing unit, for being processed to described interior point and exterior point using the PATH in programming language, is obtained
Road model, and it is based on described road model drafting road profile in described viewing area；
Second drawing unit, draws for described road profile is carried out with road conditions drafting and road nodename.
Road conditions method for drafting provided in an embodiment of the present invention and device, obtain the GIS number of whole section of road to be drawn first
According to extracting the longitude of interior point of described whole section of road and latitude, and the longitude according to described interior point and latitude will described interior point throwing
It is mapped to viewing area；If judge afterwards to know described whole section of road as one-way road and in short distance continuous inverse change,
Using secondary Bessel equation to point in described whole section of road benefit, and exterior point is generated based on the interior point of described whole section of road；Then
Using the PATH in programming language, described interior point and exterior point are processed, obtain road model, and in described viewing area
Road profile is drawn based on described road model；Finally road conditions drafting is carried out to described road profile and road nodename is painted
System, on the one hand, whole section of road is mended with interior point it can be ensured that obtaining a smooth road by using secondary Bessel equation,
The abstract road that drafting obtains is made to have higher compatible degree with real road, on the other hand, by road understanding is become two-sided flat
The model of row, extracts interior point and exterior point, the Path that interior point and exterior point are added to programming language complete completing the exhibition of road
Now work, can solve the problem that the junction of the different road conditions sections that prior art exists occurs the problem of stiff bifurcated.
Brief description
Fig. 1 is the signal of a kind of road figure (right figure) that obtains of existing drafting scheme and real road figure (left figure)
Figure；
Fig. 2 is the connection diagram of the different road conditions sections that a kind of existing drafting scheme obtains；
Fig. 3 is the schematic flow sheet of road conditions method for drafting one embodiment of the present invention；
Fig. 4 is the schematic diagram of the partly interior point of road before and after point in mending in another embodiment of road conditions method for drafting of the present invention；
Fig. 5 is the structural representation of road conditions drawing apparatus one embodiment of the present invention.
Specific embodiment
Purpose, technical scheme and advantage for making the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is explicitly described it is clear that described embodiment is the present invention
A part of embodiment, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
The every other embodiment being obtained under the premise of making creative work, broadly falls into the scope of protection of the invention.
Referring to Fig. 3, the present embodiment discloses a kind of road conditions method for drafting, including：
S1, obtain the GIS data of whole section of road to be drawn, extract the longitude of interior point and the latitude of described whole section of road,
And described interior point is projected viewing area by the longitude according to described interior point and latitude；
The road information that can obtain from GIS (Geographic Information System, GIS-Geographic Information System)
For the form of longitude and latitude+node+road conditions, when carrying out drawing it is necessary first to interior point is projected two-dimensional display area.Need
It is noted that the trend of road node (generally being unilateral road centre to take a little) gathering GIS is referred to as original point, it is
Simple flow, this point is also interior point.Interior position to outside road (i.e. towards road single towards when road right
Side) translation, translation distance is road original width, obtains a sequence of points, and these points are referred to as exterior point.Described interior point projects aobvious
Show region Formula of Coordinate System Transformation be { x1, y1 }={ ((x-minlon)/(maxlon-minlon)) * r0*x, ((x-
Minlat)/(maxlat-minlat)) * r0*y, wherein, x1 and y1 be respectively in the abscissa in described viewing area for the point and
Ordinate, x and y is respectively longitude and the latitude of interior point, minlon and maxlon is respectively the warp of the interior point of described whole section of road
The minimum of a value of degree and maximum, minlat and maxlat is respectively the minimum of a value of latitude of interior point and the maximum of described whole section of road
Value, r0 is the pantograph ratio of interior point.
It should be noted that planar, for naked eyes or be difficult to observe after the interior point-rendering of hypotelorism, or effect
And inconspicuous, thus, in order to improve drafting speed, when drawing, point in these can be rejected, the calculation that the present invention uses
Method can be classical Douglas-Pu Ke algorithm.The basic ideas of this algorithm are：One is virtually connected directly to point in the first and last of road
Line, seeks the distance of all interior points and this straight line, and finds out maximum range value dmax, by dmax compared with limit difference D：If dmax<D,
In the centre of road, point is all cast out；If dmax >=D, retain the corresponding interior point of dmax, and with this interior point as boundary, in road
Point is divided into two parts, to this two parts Reusability the method, until no point can be cast out.
If S2 judge to know described whole section of road as one-way road and in short distance continuous inverse change, using two
Secondary Bessel equation is to point in described whole section of road benefit, and generates exterior point based on the interior point of described whole section of road；
In the present embodiment, the PATH that method for drafting adopts is secondary Bezier or multiple Bezier, if short
The situation of continuous inverse change in the distance, and curve occurs serious distortion, for solving this problem, needs by mending point
Method remedies aberration problems.It should be noted that the condition mending point includes：(1) road is reverse；(2) reversely violent.Judging
When whether road meets the condition mending point, needs are firstly for whole section of road, according to trend of road, by every four continuous interior dot-dash
It is divided into one group, for point in every group, adjacent interior point in this group is linked to be line segment two-by-two, is judged according to each group line segment afterwards.
Illustrate whether road meets the deterministic process of the condition mending point with specific example below, and when meeting, how to mend mistake a little
Journey.Such as, for interior point A, B, C, the D shown in left figure in Fig. 4, calculate consecutive points in point A, B, C, D respectively and connect the company being formed
The slope L (AB) of line AB, BC, CD, L (BC), L (CD), if L (AB)>L (BC) and L (BC)<L (CD) then proves D point reversely, road
If road is reversely or L (AB)<L (BC) and L (BC)>L (CD) then proves D point reversely, and road is reverse；Other situations then illustrate road
Not reverse.After determining that road is reverse, need to judge whether reversely acutely, that is, to need to calculate outgoing vectorWith vector's
Angle α and vectorWith vectorThe ratio of length L of angle β sum and line segment BC absolute valueWhether it is more than
Threshold value A 0 (typically taking 0.6 times of road width), if more than it is determined that going out reversely violent, otherwise, it determines go out reversely inviolent.
If it is determined that reversely violent, then calculate new interior point using secondary Bessel equation and be added between interior point A and D that (new is interior
Often be spaced a unit distance in point between adjacent 2 points), and delete interior point B and C, mend between interior point A and D in formation after point
Interior point is as shown in Fig. 4 right figure.
After putting in mending, need to generate corresponding exterior point according to the interior point of road, process can include：For each two phase
Adjacent interior point, determines corresponding as point in this two with the point putting the width for described whole section of road for the distance in this two respectively
Exterior point, wherein, this exterior point be located at this two in point line formed line segment right side.
S3, using the PATH in programming language, described interior point and exterior point are processed, obtain road model, and described
It is based on described road model in viewing area and draw road profile；
In the present embodiment, described S3, can include：
All interior points are put in PATH using secondary bessel method positive sequence；
Point in last is connected to last exterior point；
By except other exterior points of last exterior point described, put into PATH using secondary bessel method inverted order；
Terminate PATH, so that interior exterior point is joined end to end, obtain described road model；
Using the paintbrush retouching edge mode, path filling is carried out to described road model, obtain described road profile.
S4, described road profile is carried out with road conditions drafting and road nodename draw.
Road conditions method for drafting provided in an embodiment of the present invention, obtains the GIS data of whole section of road to be drawn first, extracts
The longitude of interior point of described whole section of road and latitude, and described interior point is projected display by the longitude according to described interior point and latitude
Region；If judge afterwards to know described whole section of road as one-way road and in short distance continuous inverse change, using secondary
Bessel equation is to point in described whole section of road benefit, and generates exterior point based on the interior point of described whole section of road；Followed by programming
PATH in language is processed to described interior point and exterior point, obtains road model, and is based on described in described viewing area
Road model draws road profile；Finally described road profile is carried out with road conditions drafting and road nodename is drawn, on the one hand,
Whole section of road being mended with interior point it can be ensured that obtaining a smooth road by using secondary Bessel equation, so that drafting is obtained
Abstract road and real road have higher compatible degree, on the other hand, by road understanding is become two-sided parallel model, carry
Point and exterior point in taking out, the Path that interior point and exterior point are added to programming language complete completing the work that represents of road, can
Solve the problems, such as that the junction of the different road conditions sections that prior art exists occurs stiff bifurcated.
On the basis of preceding method embodiment, described S4, can include：
Extract the node road condition data of described whole section of road from described GIS data, form road conditions array；
Between each two adjacent element in described road conditions array, intubating length is 0 intermediate color, obtains new road conditions
Array；
Described new road conditions array is changed into corresponding color array；
Calculate the total length of one-way road, count the length of each node road conditions, and calculate length and the institute of each node road conditions
State the ratio of total length, obtain road conditions ratio array；
Obtain the final position of each element in described color array according to described road conditions ratio array, and be based on described end
Point position and color array generate color position array；
Obtain in first of described whole section of road principal direction point and point in last, according to point in described first and
In last, point calculates the angle of described whole section of road；
Angle according to described color position array and whole section of road uses the paintbrush of fill pattern to fill described road
Profile, completes the drafting of road conditions, and wherein, during drafting, described whole section of road is arranged to linear road.
In paintbrush, each color has start position, starting point color, final position and terminal colour.Using multiple face
During color, need for color to be combined into array, color position is combined into data.In the present embodiment, it is 20KM's such as a certain length
Road, 8KM road conditions green mark before this road, ensuing 5KM road conditions are identified with yellow, and 2KM road conditions afterwards are red
Mark, last 5KM road conditions are identified with yellow, then can form road conditions array (G, Y, R, Y), and wherein, G represents green mark road
Condition, Y represents yellow mark road conditions, and R represents red mark road conditions.Each segment description is G (0,0.4), Y (0.4,0.65), R respectively
(0.65,0.75), Y (0.75,1), wherein, value in bracket, first is worth for start position, and second is worth for final position.
If after paintbrush paints redness, paintbrush is red, want to draw green, objective can have one by the green process of red change, this mistake
Journey is referred to as gradual change.Due to there is a gradual change between every two kinds of colors, but road conditions are directly to change to Huang from green, do not have gradual change
Effect, thus need between each two color add length be 0 intermediate color, the road conditions array adding be (G, → Y, Y, →
R, R, → Y, Y), corresponding color array is (green, yellow, yellow, red, red, yellow, yellow), retouches for each section
State is G (0,0.4), → Y (0.4,0.4), Y (0.4,0.65), → R (0.65,0.65), R (0.65,0.75), → Y respectively
(0.75,0.75), Y (0.75,1).Finally all data are sequentially stored in array and can get colour bits and put array, that is, (0//
Starting point, the terminal of 0.4//G, the terminal of 0.4//→ Y, the terminal of 0.65//Y, the terminal of 0.65//→ R, the terminal of 0.75//R,
The terminal of 0.75//→ Y, the terminal of 1//Y).It should be noted that each color has starting and terminal point, but paintbrush current location
It is exactly starting point, so only needing to arrange starting point in the first step, other positions can not set starting point again.
On the basis of preceding method embodiment, described S4, can include：
S40, the longitude and latitude span of the described whole section of road of acquisition, determine text composition side according to described longitude and latitude span
To；
If it should be noted that the longitude span of whole section of road be more than latitude span, the vertical typesetting of word, otherwise, level
Typesetting.
S41, find out interior point at each node, the position of the interior point at each node is corresponded to as described whole section of road
The initial position that the title of node shows；
S42, according to default font, font size information, calculate size shared by single Chinese character；
S43, for each node, the initial position being shown according to the title of this node and chi shared by single Chinese character
Very little, determine the coffin shared by the title of this node, if the coffin shared by title of this node is known in detection
Overlapping with the coffin presence shared by the title of other nodes of this near nodal, then by shared by the title of this node
Coffin to the left or moves down predeterminable range according to described text composition direction compared to initial position, if detecting after mobile
Know the coffin shared by the title of other nodes of the coffin shared by the title of this node and this near nodal
Still suffer from overlap, then again by the coffin shared by the title of this node after movement according to described text composition direction compared to
The opposite direction of an initial position moving direction forward moves predeterminable range, and duplicate detection, the process of reverse movement are until this section
There is not weight with the coffin shared by the title of other nodes of this near nodal in the coffin shared by title of point
Folded, then the now rectangle shared by the title of this node that the coffin shared by the title of this node is as finally determined
Space, or until the coffin shared by title of this node exceeds viewing area border, then according to described text composition
Direction increases display line number or the columns of the title of this node, re-executes step S43 until finally determining the name of this node
Claim shared coffin or until the display line number after increasing or columns are more than the Chinese that the title of this node is comprised
Character quantity, wherein, the first time result of calculation of described coffin is to arrange according to described word based on by the title of this node
Version direction calculated with single file/columnar version typesetting, after once the equidirectional distance compared to initial position movement than previous
Vice-minister, the distance of a direction kth time movement is equal with the distance of other direction kth time movement, and k is positive integer；
S44, the node of the coffin shared by title is finally determined for each, according to the title institute of this node
The coffin taking calculates start position and the section row that title shows, is exercised with default picture according to described start position and section
Title drawn by pen.
Firstly the need of explanation, described predeterminable range can be arranged as required to, and is such as set to 5 pixels.If civilian
Word writing direction is horizontal typesetting, then move in the lateral direction in mobile corresponding coffin, be typically first moved to the left, and
And corresponding coffin exceed viewing area border when increase be display line number, typically once increase a line；If word
Writing direction is vertical typesetting, then vertically move in mobile corresponding coffin, typically first move up, and
Increase when corresponding coffin is beyond viewing area border is display columns, typically once increases by row.For example,
Such as the coffin M0 shared by the title of a certain node it is assumed that M0 about move back and forth during still suffer from weight
Folded, and move to when the 8th time beyond viewing area border, then increase a line display line number, obtain showing that the rectangle that line number is 2 is empty
Between M1, now, then to M1 about move back and forth, if left and right still suffers from overlap during moving back and forth, and when moving to the 9th time
Beyond viewing area border, then increase a line display line number, obtain showing the coffin M2 that line number is 3, then, more left to M2
The right side moves back and forth, if left and right still suffers from overlap during moving back and forth, and moves to beyond viewing area border when the 10th time,
Then increase a line display line number, obtain showing the coffin M3 that line number is 4, if the title of this node only includes 2 characters, because
The display line number 3 of the coffin now obtaining is more than 2, then give up the coffin shared by the title of this node, if or
The title of this node includes 4 characters, then again to M3 about move back and forth, if do not exist when left and right moves back and forth to the 2nd time weight
Folded, then the position moving to the coffin shared by the title of this node for the 2nd time is as the final coffin determining.
On the basis of preceding method embodiment, described S2, can also include：
If judging to know described whole section of road as two-way road, picking out from described two-way road with reference to road, utilizing
Described with reference to road, the non-interior point with reference to road is rectified a deviation；
If judging to know described whole section of road continuous inverse change in short distance, using secondary Bessel equation to institute
State point in whole section of road benefit, and exterior point is generated based on the interior point of described whole section of road.
Road data because collecting might not be completely correct, and the both direction appearance being likely to result in a road is non-
Normally interlocking, thus not being inconsistent with real road, therefore needing the interior point of two-way road is rectified a deviation.It is exemplified below.
Such as it is assumed that the interior point sum of circuit a, b of the both direction of two-way road is respectively N (a) and N (b), the total drift angle of interior point
(deviation angle sum of the line of interior point adjacent two-by-two) is respectively D (a) and D (b), as | N (a)-N (b) |<5, and D (a)<D
When (b), select circuit a as with reference to road, otherwise select circuit b as with reference to road；As N (a)-N (b)>When 5, circuit a is selected to make
It is with reference to road；As N (b)-N (a)>When 5, select circuit b as with reference to road.
Assume to determine that circuit a is with reference to road, then for non-with reference to point in each on road, make this interior point to reference on road
The vertical line of the line of interior point adjacent two-by-two, the maximum length of calculated vertical line section, if judge to know that this maximum length is little
In default numerical value (being traditionally arranged to be 10 pixels), then deviate from and move this interior point with reference to road, make this interior point to the shortest vertical line section
Distance be this maximum length (it should be noted that this interior point moves all the time on the straight line that the shortest vertical line section is located), otherwise,
Then keep this interior position constant.
Referring to Fig. 5, the present embodiment discloses a kind of road conditions drawing apparatus, including：
Projecting unit 1, for obtaining the GIS data of whole section of road to be drawn, extracts the interior point of described whole section of road
Longitude and latitude, and described interior point is projected viewing area by the longitude according to described interior point and latitude；
Signal generating unit 2, if for judging to know that described whole section of road continuously reversely become as one-way road and in short distance
Change, then using secondary Bessel equation to point in described whole section of road benefit, and exterior point is generated based on the interior point of described whole section of road；
First drawing unit 3, for being processed to described interior point and exterior point using the PATH in programming language, is obtained
Road model, and it is based on described road model drafting road profile in described viewing area；
Second drawing unit 4, draws for described road profile is carried out with road conditions drafting and road nodename.
Road conditions drawing apparatus provided in an embodiment of the present invention, obtain the GIS data of whole section of road to be drawn first, extract
The longitude of interior point of described whole section of road and latitude, and described interior point is projected display by the longitude according to described interior point and latitude
Region；If judge afterwards to know described whole section of road as one-way road and in short distance continuous inverse change, using secondary
Bessel equation is to point in described whole section of road benefit, and generates exterior point based on the interior point of described whole section of road；Followed by programming
PATH in language is processed to described interior point and exterior point, obtains road model, and is based on described in described viewing area
Road model draws road profile；Finally described road profile is carried out with road conditions drafting and road nodename is drawn, on the one hand,
Whole section of road being mended with interior point it can be ensured that obtaining a smooth road by using secondary Bessel equation, so that drafting is obtained
Abstract road and real road have higher compatible degree, on the other hand, by road understanding is become two-sided parallel model, carry
Point and exterior point in taking out, the Path that interior point and exterior point are added to programming language complete completing the work that represents of road, can
Solve the problems, such as that the junction of the different road conditions sections that prior art exists occurs stiff bifurcated.
Said apparatus can execute any one road conditions method for drafting aforementioned, thus can solve identical technical problem,
Reach same technique effect.
Those skilled in the art are it should be appreciated that embodiments herein can be provided as method, system or computer program
Product.Therefore, the application can be using complete hardware embodiment, complete software embodiment or the reality combining software and hardware aspect
Apply the form of example.And, the application can be using in one or more computers wherein including computer usable program code
The upper computer program implemented of usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) produces
The form of product.
The application is the flow process with reference to method, equipment (system) and computer program according to the embodiment of the present application
Figure and/or block diagram are describing.It should be understood that can be by each stream in computer program instructions flowchart and/or block diagram
Flow process in journey and/or square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided
The processor instructing all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device is to produce
A raw machine is so that produced for reality by the instruction of computer or the computing device of other programmable data processing device
The device of the function of specifying in present one flow process of flow chart or multiple flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions may be alternatively stored in and can guide computer or other programmable data processing device with spy
Determine in the computer-readable memory that mode works so that the instruction generation inclusion being stored in this computer-readable memory refers to
Make the manufacture of device, this command device realize in one flow process of flow chart or multiple flow process and/or one square frame of block diagram or
The function of specifying in multiple square frames.
These computer program instructions also can be loaded in computer or other programmable data processing device so that counting
On calculation machine or other programmable devices, execution series of operation steps to be to produce computer implemented process, thus in computer or
On other programmable devices, the instruction of execution is provided for realizing in one flow process of flow chart or multiple flow process and/or block diagram one
The step of the function of specifying in individual square frame or multiple square frame.
It should be noted that herein, such as first and second or the like relational terms are used merely to a reality
Body or operation are made a distinction with another entity or operation, and not necessarily require or imply these entities or deposit between operating
In any this actual relation or order.And, term " inclusion ", "comprising" or its any other variant are intended to
Comprising of nonexcludability, wants so that including a series of process of key elements, method, article or equipment and not only including those
Element, but also include other key elements being not expressly set out, or also include for this process, method, article or equipment
Intrinsic key element.In the absence of more restrictions, the key element that limited by sentence "including a ..." it is not excluded that
Also there is other identical element including in the process of described key element, method, article or equipment.Term " on ", D score etc. refers to
The orientation showing or position relationship are based on orientation shown in the drawings or position relationship, are for only for ease of the description present invention and simplification
Description, rather than indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and behaviour
Make, be therefore not considered as limiting the invention.Unless otherwise clearly defined and limited, term " installation ", " being connected ",
" connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or is integrally connected；Can be
It is mechanically connected or electrically connect；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, can be two
The connection of element internal.For the ordinary skill in the art, above-mentioned term can be understood as the case may be at this
Concrete meaning in invention.
In the specification of the present invention, illustrate a large amount of details.Although it is understood that, embodiments of the invention can
To put into practice in the case of there is no these details.In some instances, known method, structure and skill are not been shown in detail
Art, so as not to obscure the understanding of this description.Similarly it will be appreciated that disclosing and help understand respectively to simplify the present invention
One or more of individual inventive aspect, in the description to the exemplary embodiment of the present invention above, each of the present invention is special
Levy and be sometimes grouped together in single embodiment, figure or descriptions thereof.However, should not be by the method solution of the disclosure
Release be intended to following in reflection：I.e. the present invention for required protection requires than the feature being expressly recited in each claim more
Many features.More precisely, as the following claims reflect, inventive aspect is less than single reality disclosed above
Apply all features of example.Therefore, it then follows claims of specific embodiment are thus expressly incorporated in this specific embodiment,
Wherein each claim itself is as the separate embodiments of the present invention.It should be noted that in the case of not conflicting, this
Embodiment in application and the feature in embodiment can be mutually combined.The invention is not limited in any single aspect,
It is not limited to any single embodiment, be also not limited to any combination and/or the displacement of these aspects and/or embodiment.And
And, can be used alone each aspect of the present invention and/or embodiment or with other aspects one or more and/or its enforcement
Example is used in combination.
Finally it should be noted that：Various embodiments above only in order to technical scheme to be described, is not intended to limit；To the greatest extent
Pipe has been described in detail to the present invention with reference to foregoing embodiments, it will be understood by those within the art that：Its according to
So the technical scheme described in foregoing embodiments can be modified, or wherein some or all of technical characteristic is entered
Row equivalent；And these modifications or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology
The scope of scheme, it all should be covered in the middle of the claim of the present invention and the scope of specification.
Claims (10)
1. a kind of road conditions method for drafting is it is characterised in that include：
S1, obtain the GIS data of whole section of road to be drawn, extract the longitude of interior point and the latitude of described whole section of road, and root
Described interior point is projected viewing area by longitude and latitude according to described interior point；
If S2 judge to know described whole section of road as one-way road and in short distance continuous inverse change, using secondary shellfish
Sai Er equation is to point in described whole section of road benefit, and generates exterior point based on the interior point of described whole section of road；
S3, using the PATH in programming language, described interior point and exterior point are processed, obtain road model, and in described display
It is based on described road model in region and draw road profile；
S4, described road profile is carried out with road conditions drafting and road nodename draw.
2. method according to claim 1 is it is characterised in that described interior point projects the Formula of Coordinate System Transformation of viewing area
For { x1, y1 }={ ((x-minlon)/(maxlon-minlon)) * r0*x, ((x-minlat)/(maxlat-minlat)) *
R0*y }, wherein, x1 and y1 is respectively the abscissa in described viewing area for the interior point and ordinate, x and y is respectively the warp of interior point
Degree and latitude, minlon and maxlon is respectively the minimum of a value of longitude of interior point and the maximum of described whole section of road, minlat
It is respectively minimum of a value and the maximum of the latitude of the interior point of described whole section of road with maxlat, r0 is the pantograph ratio of interior point.
3. method according to claim 1 and 2 is it is characterised in that after described S1, also include：
Described interior point is carried out take out dilute, to reject partly interior point；
Wherein, described S2, including：
If judge to know described whole section of road as one-way road and in short distance continuous inverse change, using secondary Bezier
Equation to take out dilute after described whole section of road mend in point.
4. method according to claim 3 is it is characterised in that described S2, including：
Determine and mend point position, wherein, each is mended point position and is determined by point in continuous four；
Calculate new interior point using secondary Bessel equation, by the end of point in described described continuous four new of interior point addition
Between point, and the interior point of non-end points removes in putting in described continuous four.
5. method according to claim 3 is it is characterised in that described S2, including：
For the adjacent interior point of each two, determine and put the point of the width for described whole section of road for the distance and make with this two respectively
Put corresponding exterior point in this two, wherein, the right side of this exterior point line segment that point line is formed in this two.
6. method according to claim 1 is it is characterised in that described S3, including：
All interior points are put in PATH using secondary bessel method positive sequence；
Point in last is connected to last exterior point；
By except other exterior points of last exterior point described, put into PATH using secondary bessel method inverted order；
Terminate PATH, so that interior exterior point is joined end to end, obtain described road model；
Using the paintbrush retouching edge mode, path filling is carried out to described road model, obtain described road profile.
7. method according to claim 1 is it is characterised in that described S4, including：
Extract the node road condition data of described whole section of road from described GIS data, form road conditions array；
Between each two adjacent element in described road conditions array, intubating length is 0 intermediate color, obtains new road conditions array；
Described new road conditions array is changed into corresponding color array；
Calculate the total length of one-way road, count the length of each node road conditions, and it is total with described to calculate the length of each node road conditions
The ratio of length, obtains road conditions ratio array；
Obtain the final position of each element in described color array according to described road conditions ratio array, and be based on described terminal position
Put and generate color position array with color array；
Obtain and put in first of described whole section of road principal direction and point in last, according to point in described first with finally
In one, point calculates the angle of described whole section of road；
Angle according to described color position array and whole section of road uses the paintbrush of fill pattern to fill described road profile,
Complete the drafting of road conditions, wherein, during drafting, described whole section of road is arranged to linear road.
8. method according to claim 1 is it is characterised in that described S4, including：
S40, the longitude and latitude span of the described whole section of road of acquisition, determine text composition direction according to described longitude and latitude span；
S41, find out interior point at each node, using the position of the interior point at each node as described whole section of road corresponding node
The initial position that shows of title；
S42, according to default font, font size information, calculate size shared by single Chinese character；
S43, for each node, the initial position being shown according to the title of this node and size shared by single Chinese character,
Determine the coffin shared by the title of this node, if detection is known the coffin shared by title of this node and is somebody's turn to do
The coffin shared by the title of other nodes of near nodal exists overlapping, then by the rectangle shared by the title of this node
Space to the left or moves down predeterminable range according to described text composition direction compared to initial position, knows if detecting after mobile
Coffin shared by the title of this node is still deposited with the coffin shared by the title of other nodes of this near nodal
In overlap, then again by the coffin shared by the title of this node after movement according to described text composition direction compared to initial
The opposite direction of position moving direction forward moves predeterminable range, and duplicate detection, the process of reverse movement are until this node
Coffin shared by title and the coffin shared by the title of other nodes of this near nodal do not exist overlapping, then
The now coffin shared by the title of this node that the coffin shared by the title of this node is as finally determined,
Or until the coffin shared by title of this node exceeds viewing area border, then increase according to described text composition direction
Plus the display line number of the title of this node or columns, re-execute step S43 until finally determining shared by the title of this node
Coffin or the display line number up to after increase or columns are more than the Chinese character number that the title of this node is comprised
Amount, wherein, the first time result of calculation of described coffin be based on by the title of this node according to described text composition direction
Calculated with single file/columnar version typesetting, after once the equidirectional distance compared to initial position movement than previous vice-minister, one
The distance of direction kth time movement is equal with the distance of other direction kth time movement, and k is positive integer；
S44, the node of the coffin shared by title is finally determined for each, according to shared by the title of this node
Coffin calculate start position and the section row that title shows, exercised according to described start position and section and painted with presetting paintbrush
Title processed.
9. method according to claim 1, it is characterised in that described S2, also includes：
If judging to know described whole section of road as two-way road, pick out with reference to road from described two-way road, using described
With reference to road, the non-interior point with reference to road is rectified a deviation；
If judging to know described whole section of road continuous inverse change in short distance, using secondary Bessel equation to described whole
Point in Duan Daolu benefit, and exterior point is generated based on the interior point of described whole section of road.
10. a kind of road conditions drawing apparatus are it is characterised in that include：
Projecting unit, for obtaining the GIS data of whole section of road to be drawn, extract described whole section of road the longitude of interior point and
Latitude, and described interior point is projected viewing area by the longitude according to described interior point and latitude；
Signal generating unit, if for judge to know described whole section of road as one-way road and in short distance continuous inverse change,
Using secondary Bessel equation to point in described whole section of road benefit, and exterior point is generated based on the interior point of described whole section of road；
First drawing unit, for processing to described interior point and exterior point using the PATH in programming language, obtains road mould
Type, and it is based on described road model drafting road profile in described viewing area；
Second drawing unit, draws for described road profile is carried out with road conditions drafting and road nodename.
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