CN104392632B - A kind of method extracting flight number based on accommodation data - Google Patents
A kind of method extracting flight number based on accommodation data Download PDFInfo
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- CN104392632B CN104392632B CN201410572613.2A CN201410572613A CN104392632B CN 104392632 B CN104392632 B CN 104392632B CN 201410572613 A CN201410572613 A CN 201410572613A CN 104392632 B CN104392632 B CN 104392632B
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Abstract
The present invention relates to a kind of method extracting flight number based on accommodation data, comprise the following steps: boats and ships are set out and the harbour returned, and outside buffering is done on the land at place, harbour and island, forms a buffering suface；Obtaining the location track of boats and ships, it is setting out or home position of boats and ships that the location track of boats and ships intersects the intersection point of generation with buffering suface, and the process between two intersection points is exactly a flight number, obtains all flight numbers according to time sequencing sequence.The present invention can automatically extract boats and ships flight number in real time, quickly, on a large scale.
Description
Technical field
The present invention relates to data mining technology field, accommodation, particularly relate to a kind of method extracting flight number based on accommodation data.
Background technology
Boats and ships monitoring system (VMS, VesselMonitoringSystem) boats and ships time, position and multidate information can be provided, nearly 50,000 of current China's fishing boat mounting shipping automatic identification equipment (AIS), big-dipper satellite accommodation monitor nearly 50,000, CDMA public's mobile communication equipment 110,000, the real-time of seagoing fishing vessel accommodation is got in touch with and tracing and monitoring by preliminary realization.Existing flight number recording method has multiple, as: the points for investigation in manual record flight number and flight number in (1) fact-finding process；(2), in flight course planning, flight number is designed according to beeline, optimal path etc.；(3) by computer typing flight number in flight number management, flight number is managed.These flight number recording methods are all record or management one or several fishing boats, mainly rely on manual entry and judgement.Due to AIS, CDMA, Beidou navigation technology application, it is possible to obtain Ship dynamic situation information quickly, on a large scale, such as time, position, the speed of a ship or plane, course, turn to the information such as rate.Particularly fishing boat Big Dipper terminal, the temporal resolution of the longitude and latitude accommodation data of transmission is 3 minutes, and spatial resolution is about 10 meters, and space-time precision is high, real-time.Existing method be not suitable for real-time, quickly, on a large scale, boats and ships flight number automatically extract, currently without the method that special pin accommodation data automatically extract flight number.
Summary of the invention
The technical problem to be solved is to provide a kind of method extracting flight number based on accommodation data, it is possible to be applicable to by the spatial relationship flight number from accommodation extracting data boats and ships.
The technical solution adopted for the present invention to solve the technical problems is: provides a kind of method extracting flight number based on accommodation data, comprises the following steps:
(1) boats and ships are set out and the harbour returned, and outside buffering is done on the land at place, harbour and island, forms a buffering suface；
(2) obtaining the location track of boats and ships, it is that boats and ships set out or home position that the location track of boats and ships intersects the intersection point of generation with buffering suface, and the process between two intersection points is exactly a flight number, obtains all flight numbers according to time sequencing sequence.
The location track of boats and ships is intersected the change producing the distance that intersection point is reduced to accommodation point and buffering suface by described step (2) with buffering suface, go to sea in the process returned at boats and ships, distance value is from 0, become larger, then diminishing, eventually become 0, distance value is become the change procedure being varied down to again greatly 0 as a flight number by 0, sorting according to time sequencing, traversal range data obtains all flight numbers.
Little island are combined the quantity in minimizing face by described step (1) when outwards cushioning.
The direction of the location track of the boats and ships in described step (2) judges according to the time sequencing of accommodation point.
The location track of the boats and ships in described step (2) utilizes Big Dipper accommodation data acquisition.
Beneficial effect
Owing to have employed above-mentioned technical scheme, the present invention is compared with prior art, have the following advantages that and good effect: boats and ships are set out and the harbour returned by the present invention, and the land at place, harbour or island do outwards buffering formation face, the technology such as the Big Dipper, AIS, CDMA is utilized to obtain the location track of boats and ships, what the location track of boats and ships intersected the intersection point of generation with buffering suface is exactly that boats and ships set out or home position, process between two intersection points is exactly a flight number, and thus the present invention can automatically extract boats and ships flight number in real time, quickly, on a large scale.The location track of boats and ships is intersected the change calculating the distance that intersection point is reduced to accommodation point and buffering suface by the present invention with buffering suface, facilitates computing, improves efficiency.
Accompanying drawing explanation
Fig. 1 is the flight number schematic diagram setting out with putting back to port identical；
Fig. 2 is the distance change schematic diagram set out with identical two flight numbers that put back to port；
Fig. 3 sets out and puts back to port different, and harbour is at the flight number schematic diagram of same straight line water front；
Fig. 4 be set out from put back to port different, harbour at same straight line water front, the distance change schematic diagram of two flight numbers；
Fig. 5 sets out and puts back to port different, and harbour is not at the flight number schematic diagram of same straight line water front；
Fig. 6 be set out from put back to port different, harbour not at same straight line water front, the distance change schematic diagram of two flight numbers；
Fig. 7 sets out and the identical actual fishing boat track schematic diagram that puts back to port；
Fig. 8 sets out and the identical longitude and latitude that puts back to port changes over curve chart；
Fig. 9 sets out and the same distance that puts back to port changes over curve chart；
Figure 10 sets out and the different actual fishing boat track schematic diagram that puts back to port；
Figure 11 sets out and the different longitude and latitude that puts back to port changes over curve chart；
Figure 12 sets out and the different distance that puts back to port changes over curve chart.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is expanded on further.Should be understood that these embodiments are merely to illustrate the present invention rather than restriction the scope of the present invention.In addition, it is to be understood that after having read the content that the present invention lectures, the present invention can be made various changes or modifications by those skilled in the art, and these equivalent form of values fall within the application appended claims limited range equally.
Embodiments of the present invention relate to a kind of method extracting flight number based on accommodation data, comprise the following steps: boats and ships are set out and the harbour returned, and outside buffering is done on the land at place, harbour and island, forms a buffering suface；Obtaining the location track of boats and ships, it is that boats and ships set out or home position that the location track of boats and ships intersects the intersection point of generation with buffering suface, and the process between two intersection points is exactly a flight number, obtains all flight numbers according to time sequencing sequence.
The present invention is further illustrated below for fishing boat.
1. make polygon buffering suface
Hexagonal periphery is dispersed with harbour, makes polygon for calculating a little to the distance in face.Face S in Fig. 1, Fig. 3, Fig. 5 is exactly polygon, and face has harbour A～E.
General coastal many island and harbour in practical application, it is how more complicated with the quantity that puts back to port that fishing boat goes to sea harbour, outwards does relief area when making polygon, and little island combine, and reduces the quantity in face, improves speed when distance calculates.First the Buffer in ArcGIS workbox cushions, then with Dissolve, offshore islands and continent are merged into a polygon, the quantity of polygon edge point is reduced again with SimplifyPolygon, finally import to SQLServer2008R2 data base with Shape2Sql instrument, storing by geography data type, the type is that spatial data provides a storage organization being combined definition by longitude and latitude.
2. obtain fishing boat accommodation point
Obtaining the accommodation point of fishing boat, fishing boat accommodation point has multiple situation with the harbour set out with return.Set out and put back to port identical (Fig. 1), have 14 accommodation points；Setting out and put back to port different, same straight line water front (Fig. 3), there are 13 accommodation points at harbour, set out from put back to port different,, not same straight line water front (Fig. 4), there are 14 accommodation points at harbour, it is possible to judge fishing boat course bearing according to a time of record.
For the two of Xiangshan of Zhejiang Province fishing boats, set out the phase diagram 7 that puts back to port, and set out the different Figure 10 that puts back to port.The fishing boat (B300497) of Xiangshan of Zhejiang Province power 350kW in 2013 has 74380 accommodation points, fishes at January, 4～June, 9～December, track harbour near an Xiangshan County, turnover sea.The fishing boat (B302564) of greatest service, sea, Jiangsu in 2013 rate 110kW has 51093 accommodation points, fishes in 8～November of January, and turnover sea track is a coastal harbour, coastal two harbours, Ganyu County in Sheyang County.Fig. 7 and Figure 10 is with ArcGIS two fishing boats operation track schematic diagram of 2013 made.
The Huanghai Sea, the East Sea are to the east of China's Mainland, and fishing boat launching-out operation longitude changes greatly, and fishing boat due east voyage of going to sea is short, and therefore latitude change is less, and minimum longitude is exactly generally flight number terminal, substantially may determine that flight number quantity from longitude change.The South Sea then latitude changes greatly, and longitude change is little, and maximum latitude is exactly generally flight number terminal, substantially may determine that flight number quantity according to latitude change.Simplest mode is from a harbour, returns to same harbour.Some fishing boats are from a harbour, return to another harbour, 1 year converts multiple harbour, owing to fishing boat flight number start-stop harbour is not necessarily at same harbour, it may appear that longitude (latitude) is not that minimum point (the highest) is also likely to be flight number terminal.Fig. 8 be B300497 accommodation point longitude and latitude year time change curve chart.Longitude changes greatly, and latitude change is little.The terminal of all flight numbers in 2013 is all the same harbour near Xiangshan, and therefore longitude minimum point is consistent.Figure 11 be B302564 accommodation point longitude and latitude year time change curve chart, longitude changes greatly, and latitude changes little.The terminal of all flight numbers in 2013 is gathered in coastal 1 harbour, Sheyang County, coastal 2 harbours, Ganyu County, and therefore longitude minimum point is inconsistent, it is easy to harbour point higher for longitude is regarded as operation on the sea.
3. calculate fishing boat accommodation point to polygonal distance
Accommodation is to the distance at harbour, being really the accommodation distance to place, harbour bank polygon edge, Fig. 2, Fig. 4, Fig. 6 can calculate a little to polygonal distance, in order to two flight number relations are described in figure, depicting two flight numbers, later flight number is that previous track is contrary.
According to point and polygon distance calculating method, by selecting program calculation accommodation to polygonal distance, the key sentence of SQL is as follows.
declareggeography；
Selectg=geomfromchina；
selectlon,lat,sendtime,g.STDistance(geography::Point(Lat,Lon,4326))asdistancefromBDChuanWei
The variable " g " of the first row definition geography type；Second row is variable " g " assignment by inquiring about " geom " field in " china " table；The third line inquiry Big Dipper accommodation table (BDChuanWei) returns longitude (lon), latitude (lat), time (sendtime), and by STDistance method layback (distance), Point therein is the method for geography, longitude and latitude point is converted to WGS84 (the geographySRID example number of WGS84 the is 4326) coordinate points of geography.When China, vector face marginal point is simplified to 436 points, operate on the server of IBMSystemX3650M3 standard configuration, 51093 accommodation point longitudes and latitudes, the times of inquiry fishing boat B302564, and computed range value is consuming time for 41s, can meeting the needs that flight number extracts completely, the distance of drafting changes over figure such as Fig. 9 and Figure 12.
4. according to distance change detection flight number
Calculate accommodation point after polygonal distance, sort according to time sequencing, travel through range data.Distance value, from 0, becomes larger, and then diminishes, and eventually becomes 0, and distance value is become the process of the change being varied down to again greatly 0 as a flight number by 0.When traversing certain accommodation point distance and being 0 value, this some distance value below is flight number starting point more than 0, and this some distance value above is flight number terminating point more than 0.
By calculating the distance of accommodation point and China vector face, it is possible to obtain the distance of fishing boat offshore, because distance is the distance in due east, the position therefore having is more than 200nmi.Within 2013, fishing boat B300497 has half flight number in January, and only flight number terminates, and December has half flight number only to start, and half flight number is also counted one and has 14 flight numbers.Although the initial port of each flight number is not necessarily identical, but make it all in minimum point by calculating the distance of fishing boat offshore, within 2013, fishing boat B302564 is having half flight number at the beginning of 1 month, only flight number terminates, August, first flight number was half flight number, only flight number terminates, and half flight number is also counted one and has 9 flight numbers.
5. flight number data storage management
Building flight number table and preserve flight number record, field has Big Dipper card number, flight number beginning and ending time, start-stop longitude and latitude.There are three kinds of situations in flight number record, one is to have flight number to start to terminate with flight number, at this moment preserves a complete record.Two kinds is that flight number is imperfect, this is owing to accommodation loss of data occur in the reasons such as signal disturbing, channel occupancy, terminal electricity shortage or breakpoint due to Big Dipper data, creating incomplete flight number, namely only have flight number to start or flight number terminates, at this moment flight number starts or terminates as a record.
Table 1 fishing boat B302564 flight number extracts
Table 2 fishing boat B300497 flight number extracts
Use the flight number such as table of fishing boat B302564, B300497 of Program extraction, by with fishing boat tracing point and change over curve ratio relatively, illustrate that extraction flight number is correct.
6. flight number checking
The flight number such as table of fishing boat B302564, B300497 extracted, by with fishing boat tracing point and change over curve ratio relatively, illustrate that extraction flight number is correct.Following table is to be verified as 43 flight numbers of 6 research vessels that go to sea of fishing with Zhejiang.
Table 3 flight number is verified
It is seen that, flight number time started and the research vessel flight number time started natural law difference that the Big Dipper extracts 0 day account for 80.5%, difference accounted for 92.7% in 1 day, and difference accounted for 95.1% in 2 days, more than 2 days account for 4.9%；Flight number end time and the research vessel flight number end time natural law difference that the Big Dipper extracts 0 day account for 66.7%, difference accounted for 90.5% in 1 day, and difference accounted for 95.2% in 2 days, more than 2 days account for 4.8%.Differ from the misjudgment occurred for more than 2 days mainly due to ship site deletion.The flight number of research vessel record and captain are accustomed to relevant, some captain's fishing boats departure from port (leaving the port) are as the beginning (end) of flight number, some captains fishing boat is left the port before time (refuel, add water, on the rocks etc.), time of unloading fishes of returning to port also count, because this time to be grown.The flight number of Program extraction is the beginning as flight number or end intersected with tracing point line using China's face polygon, therefore some difference in flight number start-stop definition, the difference on time of occurrence, and it is all correct for being typically in 2 days the flight number of difference by statistics.And the ratio of difference is all more than 95% in two days, it is possible to analyze for fishery and provide accurate reference.
Claims (5)
1. the method extracting flight number based on accommodation data, it is characterised in that comprise the following steps:
(1) boats and ships are set out and the harbour returned, and outside buffering is done on the land at place, harbour and island, forms a buffering suface；
(2) obtaining the location track of boats and ships, it is that boats and ships set out or home position that the location track of boats and ships intersects the intersection point of generation with buffering suface, and the process between two intersection points is exactly a flight number, obtains all flight numbers according to time sequencing sequence.
2. the method extracting flight number based on accommodation data according to claim 1, it is characterized in that, the location track of boats and ships is intersected the change producing the distance that intersection point is reduced to accommodation point and buffering suface by described step (2) with buffering suface, go to sea in the process returned at boats and ships, distance value is from 0, become larger, then diminish, eventually become 0, distance value is become the change procedure being varied down to again greatly 0 as a flight number by 0, sorting according to time sequencing, traversal range data obtains all flight numbers.
3. the method extracting flight number based on accommodation data according to claim 1, it is characterised in that when outwards cushioning, little island are combined in described step (1) quantity in minimizing face, forms a polygon buffering suface.
4. the method extracting flight number based on accommodation data according to claim 1, it is characterised in that the direction of the location track of the boats and ships in described step (2) judges according to the time sequencing of accommodation point.
5. the method extracting flight number based on accommodation data according to claim 1, it is characterised in that the location track of the boats and ships in described step (2) utilizes Big Dipper accommodation data acquisition.
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| CN109188464B (en) * | 2018-07-20 | 2023-03-24 | 中国水产科学研究院东海水产研究所 | Fishing boat in-port and out-of-sea time analysis method based on Beidou boat position data |
| CN109918608B (en) * | 2019-01-10 | 2023-07-14 | 中国水产科学研究院东海水产研究所 | Method for extracting offshore and departure distance in fishing boat operation voyage |
| CN111159451B (en) * | 2019-12-18 | 2022-07-01 | 广东省科学院广州地理研究所 | Power line point cloud dynamic monomer method based on spatial database |
| CN111210663A (en) * | 2019-12-31 | 2020-05-29 | 广州市勤思网络科技有限公司 | Method and system for judging ship entering and exiting port and acquiring ship track based on GPS information |
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| CN101344993A (en) * | 2008-03-17 | 2009-01-14 | 上海海事大学 | Watercraft remote monitoring system |
| CN101860786A (en) * | 2009-04-09 | 2010-10-13 | 北京易安特信息科技有限公司 | Method and system for managing domain-based mobile node |
| CN102687035A (en) * | 2009-12-21 | 2012-09-19 | 阿斯特里姆股份有限公司 | System for tracking ships at sea |
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| KR101103333B1 (en) * | 2010-05-27 | 2012-01-11 | 한창수 | Method for supplying sea traffic information using smart phone application |
| KR101725128B1 (en) * | 2011-11-11 | 2017-04-11 | 한국전자통신연구원 | Ultra-high speed ship detection method and apparatus thereof |
| KR20140115684A (en) * | 2013-03-21 | 2014-10-01 | (주)지엠티 | Small Ship's Integrated Automatic Location Informing System |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101344993A (en) * | 2008-03-17 | 2009-01-14 | 上海海事大学 | Watercraft remote monitoring system |
| CN101860786A (en) * | 2009-04-09 | 2010-10-13 | 北京易安特信息科技有限公司 | Method and system for managing domain-based mobile node |
| CN102687035A (en) * | 2009-12-21 | 2012-09-19 | 阿斯特里姆股份有限公司 | System for tracking ships at sea |
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