CN109859287A - A method of automatically generating vector sector - Google Patents
A method of automatically generating vector sector Download PDFInfo
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- CN109859287A CN109859287A CN201910035995.8A CN201910035995A CN109859287A CN 109859287 A CN109859287 A CN 109859287A CN 201910035995 A CN201910035995 A CN 201910035995A CN 109859287 A CN109859287 A CN 109859287A
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- 238000004364 calculation method Methods 0.000 claims description 4
- 230000007812 deficiency Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 12
- 238000004458 analytical method Methods 0.000 description 7
- 238000009826 distribution Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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- 238000012732 spatial analysis Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The present invention discloses a kind of method for automatically generating vector sector, utilize centre point coordinate, fan-shaped radius length, first fan start angle and number of sectors, each extreme coordinates are calculated, then successively centre point is connect to obtain fan-shaped radius with each endpoint, it is last that sector is generated according to selected fan edge type；The isogonism that the present invention rapid automatized can generate any first fan start angle, any sector quantity and any radius length is fan-shaped, and the deficiency of any start angle, any sector quantity and any radius length isogonism sector can not be generated quick, repeatable, in high precision by compensating for GIS platform.
Description
Technical field
The present invention relates to GIS spatial analysis field more particularly to a kind of two-dimensional sector-shaped vector space analytical unit division sides
Method more particularly relates to a kind of method for automatically generating vector sector, is embodied in based on any first fan start angle, arbitrarily
The generation of the equal angles sector figure of number of sectors and three kinds of fan edge types.
Background technique
Sector analysis method again can abbreviation sector method, be one kind using appropriate place as the center of circle, using suitable length as radius, by mesh
Mark object is divided into several fan-shaped regions, and then chooses suitable parameter and carry out subregion statistics, and result is expressed in a suitable form,
So as to descriptive study object morphology and its GIS spacial analytical method of change direction feature.Sector analysis method is as a kind of GIS
Spatial Overlap Analysis method has been widely used in the planning of all kinds of National land spaces and management domain, for example, city planning design with
Researcher usually needs for the completed region of the city range in multiple periods to be overlapped, and is divided into several fan-shaped orientation
Area, by relevant parameters such as area, the growth intensities of each sector of statistics, to quantitatively determine the dominant direction of Urban Expansion；
The departments such as city traffic control, first aid, environmental sanitation usually need overall balance using downtown or its general headquarters location as the not Tongfang in the center of circle
Upward facility and personnel depaly；The police deployment patrol police strength, in terms of also usually need by criminal phenomena
Hot spot azimuth information, using sector method with can be convenient assist solve such issues that.
Sector typically refers to a kind of two-dimensional sector-shaped vector space analytical unit, and division mode is the core of Sector analysis method
Place.Sector, which divides, relates generally to that centre point is determining, radius length is determining, first fan start angle is determining, number of sectors determines four
A aspect.The technical solution for realizing that sector divides in GIS software at present mainly has following two kinds:
Technical solution one: method is drawn in human-computer interaction.Usual way be under editing mode with man-machine interaction mode draw radioactive ray,
Equal round or sector, while needing to combine to measure, estimate, replicate, rotate, cut, connect, be displaced etc. and operate.The technical solution
Have enough flexibilities, but there are processes cumbersome, inefficiency, the problems such as reusability is poor, standardization degree is low.
Technical solution two: method is drawn in the automation based on secondary development tool.It is developed there are a kind of using Python
ArcGIS spatial manipulation wscript.exe, it is characterized in that: the vector dot file of input coordinate information containing centre point, input expression are empty
Between entity morphology feature vector face file, input number of sectors, output is divided into the vector face file of designated sector quantity.
The technical solution has the advantages that high degree of automation, simple to operation, but exists following insufficient: cannot artificially determine half path length
Degree；First fan start angle cannot be specified；Specific implementation process and its wscript.exe are undisclosed.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of methods for automatically generating vector sector, comprising the following steps:
(1) select centre point (、)；
(2) according to head fan start angle and number of sectors calculate by centre point (、) and endpoint (,) straight line with
The angle of X-axis, the sum of all fan-shaped central angles are 360 °, in conjunction with the angle, fan-shaped radius and centre point coordinate value, are calculated each
Extreme coordinates, specific formula for calculation are as follows:
；
；
In formula,For by centre point (、) and endpoint (,) straight line and X-axis angle；Headed by fanned initial line and X
The angle of axis；N is number of sectors, and n is the natural number greater than 1；、The X-coordinate value and Y-coordinate value of respectively i-th endpoint；、The respectively X-coordinate value and Y-coordinate value of centre point；For fan-shaped radius length；
(3) it is sequentially connected centre point and endpoint, forms fan-shaped radius；
(4) sector of specified fan edge type is generated.
The sector that step (4) fans edge type is arc side fan, straight flange fan or boundless fan；When for arc side fan, with ()
For the center of circle, circle is generated by radius of R, which is superimposed with fan-shaped radius can be obtained arc side fan；When for straight flange fan, use
Straight line is sequentially connected all adjacent endpoints and obtains regular polygon, just can obtain straight flange fan；When for boundless fan, just no longer need to carry out
Operation.
The invention has the characteristics that:
(1) isogonism of any first fan start angle, any sector quantity and any radius length can be generated with fast and automatically changing
It is fan-shaped.
(2) arc side fan, straight flange fan and the boundless sector for fanning three classes fan edge type altogether are produced.
(3) degree of repeatability is high, and shape positional accuracy is high, and generating process specification.
Detailed description of the invention
Fig. 1 is 1 flow chart of the embodiment of the present invention；
Fig. 2 is that the embodiment of the present invention 1 generates fan-shaped process schematic；
Fig. 3 is 2 Hong Kong Island construction land distribution schematic diagram of embodiment；
Fig. 4 is the DEM schematic diagram of 2 Hong Kong Island of embodiment；
Fig. 5 is that 2 start angle of embodiment is that the arc side isogonism fan that 15 ° of number of sectors are 7 shows with the stacked of Hong Kong Island construction land
It is intended to.
Specific embodiment
The present invention is described in further details in the following with reference to the drawings and specific embodiments.
Embodiment 1
A method of vector sector being automatically generated, as shown in Figure 1, 2, comprising the following steps:
(1) select centre point (、) it is used as coordinate origin；
(2) according to head fan start angle and number of sectors calculate by centre point (、) and endpoint (,) straight line with
The angle of X-axis, the sum of all fan-shaped central angles are 360 °, in conjunction with the angle, fan-shaped radius and centre point coordinate value, are calculated each
Extreme coordinates, specific formula for calculation are as follows:
In formula,For by centre point (、) and endpoint (,) straight line and X-axis angle；Headed by fanned initial line and X
The angle of axis；N is number of sectors, and n is the natural number greater than 1；、The X-coordinate value and Y-coordinate value of respectively i-th endpoint；、The respectively X-coordinate value and Y-coordinate value of centre point；For fan-shaped radius length；
(3) it is sequentially connected centre point and endpoint, forms fan-shaped radius；
(4) sector of specified fan edge type is generated, the sector of fan edge type is arc side fan, straight flange fan or boundless fan；When for arc side
When fan, with () it is the center of circle, circle is generated by radius of R, which is superimposed with fan-shaped radius can be obtained arc side fan；
When for straight flange fan, all adjacent endpoints are sequentially connected with straight line and obtain regular polygon, just can obtain straight flange fan；When for boundless fan
When, it just no longer needs to be operated.
Embodiment 2
Using the method for automatically generating vector sector of embodiment 1, using ArcGIS as GIS analysis platform, with Python
As additional programming language, using the construction land of the Hong Kong Island as data, as shown in Figure 3, the specific steps are as follows:
It (1) the use of XY coordinate value under WGS_1984_UTM_Zone_50N projected coordinate system is (209653.64,2465025.10)
Point as centre point, i.e.,As coordinate origin；
(2) be fan-shaped radius length (R) with 10620.08 meters, with 15 ° for start angle (), number of sectors is 7, all
The sum of fan-shaped central angle be 360 °, according to head fan start angle and number of sectors calculate by centre point (、) and endpoint (,) straight line and the angle of X-axis calculate each extreme coordinates later in conjunction with the angle, fan-shaped radius and centre point coordinate value,
Specific formula for calculation is as follows:
In formula,For by centre point (、) and endpoint (,) straight line and X-axis angle；Headed by fanned initial line and X
The angle of axis；N is number of sectors；、The X-coordinate value and Y-coordinate value of respectively i-th endpoint；、Respectively centre point
X-coordinate value and Y-coordinate value；R is fan-shaped radius length；
XY coordinate value of each endpoint in WGS_1984_UTM_Zone_50N coordinate system, the coordinate value difference of 7 points is calculated
For；[219911.85,2467773.78], [213900.53,2474759.06], [204691.21,2474414.48],
[199218.71,2466999.50], [201603.92,2458097.76], [210050.74,2454412.45],
[218198.53, 2458718.68]；7 extreme coordinates values are sequentially written in text document；Utilize the XY in text document
Coordinate value creation includes the temporary layers of endpoint；Temporary layers are switched to the endpoint file being storable in storage equipment；
(3) it is sequentially connected centre point and endpoint, forms fan radial line:
Centre point coordinate value and 7 extreme coordinates values are sequentially written in text document；Utilize the XY coordinate value in text document
Creation includes the temporary layers of centre point and end point pair；Temporary layers are switched to the point text comprising centre point and end point pair
Part generates fan diameter line file according to the dot file of generation；
(4) sector of specified fan edge type is generated:
To generate sector as arc side fan sector in the present embodiment, as shown in figure 4, all one circumference of fan-shaped formation, with arc side
Sector diagram is fanned as partitioned file, subregion statistics is carried out to Hong Kong Island construction land, obtains the construction land gross area in each subregion, such as
Shown in table 1；Construction land area is minimum in the 2nd sector according to table 1, and construction land area is most in the 3rd sector；Root
According to the area distributions of construction land in each sector it is found that the construction land on the Hong Kong Island prefers to be distributed in its northwestward, because
This soil that can be suitable for construction land distribution on initial guess Hong Kong Island is mainly distributed on the northwestward；In conjunction with the landform of the Hong Kong Island
(shown in Fig. 5) can further learn that the positive the north in the Hong Kong Island is also suitable for construction land distribution, but because of shared soil in the 2nd sector
Ground area is less, so construction land area is least in several sectors in data；The Hong Kong Island can be speculated according to analysis
More residents can be distributed in 2nd, 3 sector, if that situation is consistent mix in medical treatment, police strength, education equal part
That distributes is more.
Table 1
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto, and it is any
It is familiar with the people of the technology within the technical scope disclosed by the invention, any changes or substitutions that can be easily thought of, whether replaces GIS
Platform still replaces programming language, and all the step of illustrating by the method for the invention realizations should all be covered in protection of the invention
Within range.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (3)
1. a kind of method for automatically generating vector sector, which comprises the following steps:
(1) select centre point (、)；
(2) according to head fan start angle and number of sectors calculate by centre point (、) and endpoint (,) straight line and X
The angle of axis calculates each extreme coordinates, specific formula for calculation is as follows in conjunction with the angle, fan-shaped radius and centre point coordinate value:
；
In formula,For by centre point (、) and endpoint (,) straight line and X-axis angle；Headed by fanned initial line and X
The angle of axis；N is number of sectors, and n is the natural number greater than 1；、The X-coordinate value and Y-coordinate value of respectively i-th endpoint；、The respectively X-coordinate value and Y-coordinate value of centre point；For fan-shaped radius length；
(3) it is sequentially connected centre point and endpoint, forms fan-shaped radius；
(4) sector of specified fan edge type is generated.
2. automatically generating the method for vector sector according to claim 1, which is characterized in that the fan of step (4) fan edge type
Shape is arc side fan, straight flange fan or boundless fan.
3. automatically generating the method for vector sector according to claim 2, which is characterized in that when for arc side fan, with () it is the center of circle, circle is generated by radius of R, which is superimposed with fan-shaped radius and obtains arc side fan；It is fanned when for straight flange
When, all adjacent endpoints are sequentially connected with straight line and obtain regular polygon, obtain straight flange fan；When for boundless fan, no longer need to carry out
Operation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910035995.8A CN109859287B (en) | 2019-01-15 | 2019-01-15 | Method for automatically generating vector sector |
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| CN201910035995.8A CN109859287B (en) | 2019-01-15 | 2019-01-15 | Method for automatically generating vector sector |
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| CN109859287B CN109859287B (en) | 2023-04-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111583360A (en) * | 2020-06-04 | 2020-08-25 | 长沙景嘉微电子股份有限公司 | Method and device for generating sector graph, computer storage medium and electronic equipment |
| CN111583361A (en) * | 2020-06-04 | 2020-08-25 | 长沙景嘉微电子股份有限公司 | Method and device for generating circular ring graph, computer storage medium and electronic equipment |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05174153A (en) * | 1991-12-25 | 1993-07-13 | Mitsubishi Electric Corp | Drawing data processor |
| JP2000285247A (en) * | 1999-03-31 | 2000-10-13 | Digital Electronics Corp | Method and system for plotting sectorial figure |
| US20050182764A1 (en) * | 2004-02-13 | 2005-08-18 | Evans Lynne M. | System and method for arranging concept clusters in thematic neighborhood relationships in a two-dimensional visual display space |
| JP2006048195A (en) * | 2004-08-02 | 2006-02-16 | Central Res Inst Of Electric Power Ind | Visualization method for time-series data, visualization program and visualization system |
| CN102279874A (en) * | 2010-06-14 | 2011-12-14 | 微软公司 | Fast edge routing for interactive diagramming |
| CN102938155A (en) * | 2012-11-21 | 2013-02-20 | 北京东进记录科技有限公司 | Method and device for drawing sector airspace |
| CN205373239U (en) * | 2015-12-14 | 2016-07-06 | 四川长虹电器股份有限公司 | A back shroud that is used for refrigerator compressor installation room |
| CN107121061A (en) * | 2017-03-15 | 2017-09-01 | 大连理工大学 | A kind of drilling point law vector method for solving constrained based on elliptic cone |
-
2019
- 2019-01-15 CN CN201910035995.8A patent/CN109859287B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05174153A (en) * | 1991-12-25 | 1993-07-13 | Mitsubishi Electric Corp | Drawing data processor |
| JP2000285247A (en) * | 1999-03-31 | 2000-10-13 | Digital Electronics Corp | Method and system for plotting sectorial figure |
| US20050182764A1 (en) * | 2004-02-13 | 2005-08-18 | Evans Lynne M. | System and method for arranging concept clusters in thematic neighborhood relationships in a two-dimensional visual display space |
| JP2006048195A (en) * | 2004-08-02 | 2006-02-16 | Central Res Inst Of Electric Power Ind | Visualization method for time-series data, visualization program and visualization system |
| CN102279874A (en) * | 2010-06-14 | 2011-12-14 | 微软公司 | Fast edge routing for interactive diagramming |
| CN102938155A (en) * | 2012-11-21 | 2013-02-20 | 北京东进记录科技有限公司 | Method and device for drawing sector airspace |
| CN205373239U (en) * | 2015-12-14 | 2016-07-06 | 四川长虹电器股份有限公司 | A back shroud that is used for refrigerator compressor installation room |
| CN107121061A (en) * | 2017-03-15 | 2017-09-01 | 大连理工大学 | A kind of drilling point law vector method for solving constrained based on elliptic cone |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111583360A (en) * | 2020-06-04 | 2020-08-25 | 长沙景嘉微电子股份有限公司 | Method and device for generating sector graph, computer storage medium and electronic equipment |
| CN111583361A (en) * | 2020-06-04 | 2020-08-25 | 长沙景嘉微电子股份有限公司 | Method and device for generating circular ring graph, computer storage medium and electronic equipment |
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