CN110334166A - A kind of ship historical track querying method, terminal device and computer readable storage medium - Google Patents
A kind of ship historical track querying method, terminal device and computer readable storage medium Download PDFInfo
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- CN110334166A CN110334166A CN201910555245.3A CN201910555245A CN110334166A CN 110334166 A CN110334166 A CN 110334166A CN 201910555245 A CN201910555245 A CN 201910555245A CN 110334166 A CN110334166 A CN 110334166A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/24—Querying
- G06F16/245—Query processing
- G06F16/2455—Query execution
- G06F16/24552—Database cache management
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/29—Geographical information databases
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Abstract
The invention discloses the real-time position informations that a kind of ship historical track querying method, terminal device and computer readable storage medium, the method pass through difference ships in caching preset duration；Calculate the boundary rectangle of the real-time position information cached in the preset duration；The boundary rectangle information being calculated area information corresponding with inquiry request is compared according to ship historical track inquiry request, filters out the record information that boundary rectangle intersects with the region.Calculation amount when can be improved search efficiency using method of the invention, greatly reducing site polling historical track.
Description
Technical field
The present invention relates to ship surveillance technology field more particularly to a kind of ship historical track querying methods, terminal device
And computer readable storage medium.
Background technique
Marine information technology develops rapidly in recent years, and ship information shows explosive growth, and user believes ship monitor
The demand of breath is also higher and higher, this just requires the timeliness of back-end data processing higher and higher.In fishing boat monitoring field, inquiry
Ship historical track in a certain region is one of more common function of user.But for now, due to ships quantity compared with
More, the frequent reporting position information of a large amount of ships (passing through AIS or radar) uses pinpoint method again in query process
To determine ship whether in this region, so as to cause the time-consuming relatively long of site polling historical track.This is just dropped significantly
The low practicability of the function.
Currently there is part system to solve the problems, such as this, but is much based on superpower back-end data processing server, cluster
Deng huge calculation amount is not reduced.Not only cost is extremely high, and operation maintenance expense is also higher than General System many.
In view of the foregoing, it is necessary to propose a kind of method for quickly querying of new ship historical track.
Summary of the invention
The main purpose of the present invention is to provide querying method, terminal device and the computers of a kind of ship historical track can
Read storage medium, it is intended to solve the problems, such as that existing ship track querying method is computationally intensive and cost is high.
To achieve the above object, a kind of ship historical track querying method provided by the invention, the method includes as follows
Step:
Step S10 caches the real-time position information of different ships in preset duration；
Step S20 calculates the boundary rectangle of the real-time position information cached in the preset duration；
Step S30, according to ship historical track inquiry request by the boundary rectangle information being calculated and inquiry request pair
The area information answered is compared, and filters out the record information that boundary rectangle intersects with the region.
Preferably, the step S10 includes:
Step S11 receives the real time position data of ship；
The real time position data of ship is stored in buffer area corresponding with the ship, and set for the buffer area by step S12
Cache time started and caching end time.
Preferably, include: after the step S11
Step S110, the real time position data of ship parses the positional number of ship according to custom protocol based on the received
According to the number with ship；
At this point, the step S12 are as follows: real time position data deposit and the official number according to the number of ship by ship
Corresponding buffer area, and be buffer area setting caching time started and caching end time.
Preferably, after the step S110 further include:
Step S111 is searched in existing ship real-time track data buffer zone according to official number；
Step S112 has the corresponding buffer area of the official number, the ship that will be currently received if found
Real-time position information be appended in the buffer area；
Step S113 establishes a new buffer area if not finding the corresponding buffer area of the official number
Store the real-time position information of the ship.
Preferably, include: after the step S10
Whether step S13, the real-time position information for detecting the ship of buffer cache meet time requirement；
Step S14, when the real-time position information of the ship of buffer cache meets time requirement, by the real-time position of ship
Confidence ceases data conversion storage into database.
Preferably, the step S20 includes:
All ship real-time position informations are sequentially connected to form a closed polygon by step S21 sequentially in time；
Step S22 calculates the boundary rectangle of the closed polygon.
Preferably, the step S22 includes:
Step S221 judges whether other all the points are at the side on the side using the starting point of each edge as number；
Step S222, if ultra-left point, rightest point and most vertex are just calculated in other all the points in the same side；
Step S223, ultra-left point and rightest point position do respectively vertically with this while straight line with this while intersect, most pushing up
Point position is parallel to the straight line on the side and the straight line intersection for passing through most left rightest point, obtains rectangle；
Step S224, the area for calculating the rectangle is S1；
Each side is successively obtained area S2, S3, S4...Sn of different rectangles according to above-mentioned steps by step S225,
It is all to be calculated in area, minimum area is calculated, the corresponding rectangle of the area is obtained boundary rectangle.
Preferably, after the step S20 further include:
The real-time position information of the ship of caching and obtained boundary rectangle information are saved in storage by step S021 together
In database, and at the beginning of increasing real-time position information in the database, end time and official number.
In addition, to achieve the above object, the invention also provides a kind of terminal device, including memory, processor and
The computer program that can be run in the memory and on the processor is stored, the processor executes the computer
The step of method as described above is realized when program.
In addition, to achieve the above object, the invention also provides a kind of computer readable storage medium, the computer can
It reads storage medium and is stored with computer program, the computer program realizes the step of method as described above when being executed by processor
Suddenly.
The real-time position information that ship historical track querying method of the present invention passes through different ships in caching preset duration；Meter
Calculate the boundary rectangle of the real-time position information cached in the preset duration；It will be calculated according to ship historical track inquiry request
Boundary rectangle information area information corresponding with inquiry request be compared, filter out the note that boundary rectangle intersects with the region
Record information.Calculation amount when can be improved search efficiency using method of the invention, greatly reducing site polling historical track.
Detailed description of the invention
Attached drawing is as a part of the invention, and for providing further understanding of the invention, of the invention is schematic
Examples and descriptions thereof are used to explain the present invention, but does not constitute an undue limitation on the present invention.Obviously, the accompanying drawings in the following description
Only some embodiments to those skilled in the art without creative efforts, can be with
Other accompanying drawings can also be obtained according to these attached drawings.In the accompanying drawings:
Fig. 1 is one embodiment flow diagram of ship historical track querying method of the present invention；
Fig. 2 is ship historical track querying method overall flow schematic diagram of the present invention.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
The technical issues of with reference to the accompanying drawing and specific embodiment is solved to the embodiment of the present invention, used technical side
Case and the technical effect of realization carry out clear, complete description.Obviously, described embodiment is only one of the application
Divide embodiment, is not whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not paying creation
Property labour under the premise of, all other equivalent or obvious variant embodiment obtained all falls within protection scope of the present invention
It is interior.The embodiment of the present invention can be embodied according to the multitude of different ways being defined and covered by claim.
It should be noted that in the following description, understanding for convenience, giving many details.But it is very bright
Aobvious, realization of the invention can be without these details.
It should be noted that in the absence of clear limitations or conflicts, each embodiment in the present invention and its
In technical characteristic can be combined with each other and form technical solution.
The present invention proposes a kind of querying method of ship historical track, it is intended to solve existing ship track querying method meter
The problem that calculation amount is big and cost is high.
Referring to Fig.1, described method includes following steps:
Step S10 caches the real-time position information of different ships in preset duration；
In the present embodiment, according to the real time position data of the ship received, it is cached.Wherein, the real-time position
Setting data includes the real time position trace information of ship, official number information etc..Real time position data is being deposited into buffering
Qu Qian needs the real time position data setting caching duration limitation to storage, such as the cache-time of setting buffer area is N points
Clock.In caching later, the caching duration of the setting whether will be reached according to each caching of cache-time detection, if
It has reached, then needs in addition to open new buffer area to be stored, if do not reached, ship will be continued to
Real-time position information data.The cache-time can be configured according to actual needs.
Specifically, stable connection is established by network and radar data processor or AIS processor first, so
Ship real time position data is received by network interface afterwards, and parses position data and official number, ship according to custom protocol
Oceangoing ship data can be AIS data and radar target data, as long as including location information.
Step S20 calculates the boundary rectangle of the real-time position information cached in the preset duration；
The ship real-time position information of caching is calculated, obtains the boundary rectangle of track in the period, and should
Boundary rectangle is deposited into buffer area together；Boundary rectangle calculating process is as follows: by all ship real-time position informations according to when
Between be sequentially sequentially connected to form a closed polygon, it is assumed that have N side, using the starting point of each edge as number；Judgement
Whether other all the points are at the side on the side, a line under finding if not in the same side；If just existed in the same side
Ultra-left point, rightest point and most vertex are calculated in other all the points；It is done respectively in ultra-left point and rightest point position perpendicular to this
While straight line with this while intersect, be parallel to the straight line on the side in most vertex position and pass through the straight line intersection of most left rightest point；
So far to form a rectangle；The area for calculating the rectangle is S1；Each side is successively obtained into different squares according to above-mentioned steps
Area S2, S3, S4...Sn of shape recycle and obtain S2, S3 ... SN；In all areas, minimum area is calculated, the face
The corresponding rectangle of product is the boundary rectangle of this section of track.
Step S30, according to ship historical track inquiry request by the boundary rectangle information being calculated and inquiry request pair
The area information answered is compared, and filters out the record information that boundary rectangle intersects with the region.
Boundary rectangle information is extracted from the record information of preservation, it will be in boundary rectangle and ship historical track inquiry request
Region has been made whether overlapping region inspection, if any then the record information meets user query requirement, which is sent
It is checked to user；Such as nothing, then the record information is abandoned.
The real-time position information that the embodiment of the present invention passes through different ships in caching preset duration；It calculates in the preset duration
The boundary rectangle of the real-time position information of caching；The boundary rectangle information that will be calculated according to ship historical track inquiry request
Area information corresponding with inquiry request is compared, and filters out the record information that boundary rectangle intersects with the region.Using this
The method of invention can be improved search efficiency, calculation amount when greatly reducing site polling historical track.
In an alternative embodiment of the invention, the step S10 includes:
Step S11 receives the real time position data of ship；
The real time position data of ship is stored in buffer area corresponding with the ship, and set for the buffer area by step S12
Cache time started and caching end time.
Include: after the step S11
Step S110, the real time position data of ship parses the positional number of ship according to custom protocol based on the received
According to the number with ship；
At this point, the step S12 are as follows: real time position data deposit and the official number according to the number of ship by ship
Corresponding buffer area, and be buffer area setting caching time started and caching end time.
After the step S110 further include:
Step S111 is searched in existing ship real-time track data buffer zone according to official number；
Step S112 has the corresponding buffer area of the official number, the ship that will be currently received if found
Real-time position information be appended in the buffer area；
Step S113 establishes a new buffer area if not finding the corresponding buffer area of the official number
Store the real-time position information of the ship.
After receiving ship track data, first according to the official number of the data to existing track data buffer area into
Row is searched, and then finds the buffer area for having the official number, just current track data is appended in buffer area；If
A new buffer area is not opened up just to store the track data in the buffer area of the number.During being saved in free buffer,
The track data received for this is added into the header packet informations such as time tag, official number, finally modifies track data buffering
Track data time started in area (save data for the first time and arrive the free buffer) and data end time (finally preservation data to this
Free buffer).
Reference Fig. 2, the process of whole description ship historical track querying method of the present invention:
A, ship real time position data is received；
Stable connection is established by network and radar data processor or AIS processor first, is then passed through
Network interface receives ship real time position data, and position data and official number, ships data are parsed according to custom protocol
It can be AIS data and radar target data, as long as including location information；
B, it is stored in respective buffer area respectively according to official number, and adds the time started at the end of for the buffer area
Between；
After receiving ship track data, first according to the official number of the data to existing track data buffer area into
Row is searched, and then finds the buffer area for having the official number, just current track data is appended in buffer area；If
A new buffer area is not opened up just to store the track data in the buffer area of the number.During being saved in free buffer,
The track data received for this is added into the header packet informations such as time tag, official number, finally modifies track data buffering
Track data time started in area (save data for the first time and arrive the free buffer) and data end time (finally preservation data to this
Free buffer).
C, the ship real-time position information of caching is calculated, obtains the boundary rectangle of track in the period, and will
The boundary rectangle is deposited into buffer area together；Boundary rectangle calculating process is as follows: by all ship real-time position informations according to
Time sequencing is sequentially connected to form a closed polygon, it is assumed that has N side, using the starting point of each edge as number；Sentence
Whether other all the points of breaking are at the side on the side, a line under finding if not in the same side；If in the same side, just
Ultra-left point, rightest point and most vertex are calculated in other all the points；Ultra-left point and rightest point position do respectively vertically with
This while straight line with this while intersect, most vertex position be parallel to the side straight line and pass through most left rightest point straight line phase
It hands over；So far to form a rectangle；The area for calculating the rectangle is S1；S2, S3 is obtained and is recycled ... SN；In all areas,
Minimum area is calculated, the corresponding rectangle of the area is the boundary rectangle of this section of track.
Position data in track data buffer area is extracted, the polygon of a closure is generated according to location information
Shape calculates its boundary rectangle for the polygon, this boundary rectangle is saved in buffer area together.
D, track data is stored in database；
Check whether the buffer time of the buffer area has reached, if having reached time standard N (5-10 minutes),
Track data in buffer area, time started, end time, boundary rectangle information as a record are deposited into database
In；If buffer time is not up to standard, recycles and wait the review time next time.
E, user proposes regional historical track inquiry request；
User is sent to system for time started, end time and area information is inquired.
F, the track record for obtaining meeting temporal information is inquired from database according to the temporal information of user demand:
At the beginning of being requested according to user, the end time corresponding tracking information is inquired from database.Such as nothing
Record, then return immediately；If any record, then record information preservation is got off.
G, the area information of boundary rectangle and user's request is compared:
Boundary rectangle information is extracted from the record information of preservation, requests region to be made whether boundary rectangle and user
Overlapping region checks, if any then the record information meets user query requirement；Such as nothing, then the record information is abandoned.
H, user terminal is sent data to:
Summarize satisfactory record information, is sent to user's display end.
In addition, the invention also provides a kind of terminal device, including memory, processor and it is stored in the memory
In and the computer program that can run on the processor, the processor realize institute as above when executing the computer program
The step of stating method.
In addition, the invention also provides a kind of computer readable storage medium, the computer-readable recording medium storage
There is the step of computer program, the computer program realizes method as described above when being executed by processor.
Each step of the invention can be realized with general computing device, for example, they can concentrate on it is single
On computing device, such as: personal computer, server computer, handheld device or portable device, laptop device or more
Processor device can also be distributed over a network of multiple computing devices, they can be to be different from sequence herein
Shown or described step is executed, perhaps they are fabricated to each integrated circuit modules or will be more in them
A module or step are fabricated to single integrated circuit module to realize.Therefore, the present invention is not limited to any specific hardware and soft
Part or its combination.
Programmable logic device can be used to realize in method provided by the invention, and it is soft also to may be embodied as computer program
Part or program module (it include routines performing specific tasks or implementing specific abstract data types, programs, objects, component or
Data structure etc.), such as embodiment according to the present invention can be a kind of computer program product, run the computer program
Product executes computer for demonstrated method.The computer program product includes computer readable storage medium, should
It include computer program logic or code section on medium, for realizing the method.The computer readable storage medium can
To be the built-in medium being mounted in a computer or the removable medium (example that can be disassembled from basic computer
Such as: using the storage equipment of hot plug technology).The built-in medium includes but is not limited to rewritable nonvolatile memory,
Such as: RAM, ROM, flash memory and hard disk.The removable medium includes but is not limited to: and optical storage media (such as: CD-
ROM and DVD), magnetic-optical storage medium (such as: MO), magnetic storage medium (such as: tape or mobile hard disk), can with built-in
Rewrite the media (such as: storage card) of nonvolatile memory and the media (such as: ROM box) with built-in ROM.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of ship historical track querying method, which is characterized in that described method includes following steps:
Step S10 caches the real-time position information of different ships in preset duration；
Step S20 calculates the boundary rectangle of the real-time position information cached in the preset duration；
Step S30, it is according to ship historical track inquiry request that the boundary rectangle information being calculated is corresponding with inquiry request
Area information is compared, and filters out the record information that boundary rectangle intersects with the region.
2. ship historical track querying method according to claim 1, which is characterized in that the step S10 includes:
Step S11 receives the real time position data of ship；
The real time position data of ship is stored in buffer area corresponding with the ship, and is buffer area setting caching by step S12
Time started and caching end time.
3. ship historical track querying method according to claim 2, which is characterized in that include: after the step S11
Step S110, based on the received the real time position data of ship according to custom protocol parse ship position data and
The number of ship；
At this point, the step S12 are as follows: according to the number of ship that the real time position data deposit of ship is corresponding with the official number
Buffer area, and for the buffer area setting caching time started and caching the end time.
4. ship historical track querying method according to claim 3, which is characterized in that also wrapped after the step S110
It includes:
Step S111 is searched in existing ship real-time track data buffer zone according to official number；
Step S112 has the corresponding buffer area of the official number if found, by the reality for the ship being currently received
When location information be appended in the buffer area；
Step S113 establishes a new buffer area if not finding the corresponding buffer area of the official number to store
The real-time position information of the ship.
5. ship historical track querying method according to claim 4, which is characterized in that include: after the step S10
Whether step S13, the real-time position information for detecting the ship of buffer cache meet time requirement；
Step S14 believes the real time position of ship when the real-time position information of the ship of buffer cache meets time requirement
Data conversion storage is ceased into database.
6. ship historical track querying method according to claim 1, which is characterized in that the step S20 includes:
All ship real-time position informations are sequentially connected to form a closed polygon by step S21 sequentially in time；
Step S22 calculates the boundary rectangle of the closed polygon.
7. ship historical track querying method according to claim 6, which is characterized in that the step S22 includes:
Step S221 judges whether other all the points are at the side on the side using the starting point of each edge as number；
Step S222, if ultra-left point, rightest point and most vertex are just calculated in other all the points in the same side；
Step S223, ultra-left point and rightest point position do respectively vertically with this while straight line with this while intersect, most vertex position
The straight line for being parallel to the side and the straight line intersection for passing through most left rightest point are set, rectangle is obtained；
Step S224, the area for calculating the rectangle is S1；
Step S225, successively by each side according to above-mentioned steps S221~step S224 obtain different rectangles area S2, S3,
Minimum area is calculated in all areas being calculated in S4...Sn, and the corresponding rectangle of the area is as obtained
Boundary rectangle.
8. ship historical track querying method according to claim 7, which is characterized in that also wrapped after the step S20
It includes:
The real-time position information of the ship of caching and obtained boundary rectangle information are saved in storing data by step S021 together
In library, and at the beginning of increasing real-time position information in the database, end time and official number.
9. a kind of terminal device, including memory, processor and storage are in the memory and can be on the processor
The computer program of operation, which is characterized in that the processor realizes such as claim 1 to 8 when executing the computer program
The step of any one the method.
10. a kind of computer readable storage medium, the computer-readable recording medium storage has computer program, and feature exists
In when the computer program is executed by processor the step of any one of such as claim 1 to 8 of realization the method.
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| CN201910555245.3A CN110334166A (en) | 2019-06-25 | 2019-06-25 | A kind of ship historical track querying method, terminal device and computer readable storage medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113627234A (en) * | 2021-06-22 | 2021-11-09 | 宁波金涛船舶有限责任公司 | Ship harbor entry identification method, system, terminal and storage medium |
| CN114610774A (en) * | 2022-02-10 | 2022-06-10 | 中远海运散货运输有限公司 | Method, device, electronic equipment and medium for analyzing ship passing through selected area |
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| WO2015127540A1 (en) * | 2014-02-25 | 2015-09-03 | Maerospace Corporation | System and method for tracking and forecasting the positions of marine vessels |
| CN109218985A (en) * | 2018-08-08 | 2019-01-15 | 上海中交水运设计研究有限公司 | A kind of shipping work abnormal behavior detection method and system based on Pattern similarity |
| CN109543715A (en) * | 2018-10-23 | 2019-03-29 | 武汉理工大学 | A kind of ship air route is extracted and the method for track deviation detection |
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| WO2015127540A1 (en) * | 2014-02-25 | 2015-09-03 | Maerospace Corporation | System and method for tracking and forecasting the positions of marine vessels |
| CN109218985A (en) * | 2018-08-08 | 2019-01-15 | 上海中交水运设计研究有限公司 | A kind of shipping work abnormal behavior detection method and system based on Pattern similarity |
| CN109543715A (en) * | 2018-10-23 | 2019-03-29 | 武汉理工大学 | A kind of ship air route is extracted and the method for track deviation detection |
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| CN113627234A (en) * | 2021-06-22 | 2021-11-09 | 宁波金涛船舶有限责任公司 | Ship harbor entry identification method, system, terminal and storage medium |
| CN114610774A (en) * | 2022-02-10 | 2022-06-10 | 中远海运散货运输有限公司 | Method, device, electronic equipment and medium for analyzing ship passing through selected area |
| CN114610774B (en) * | 2022-02-10 | 2023-01-20 | 天津中远海运散运数字科技有限公司 | Method, device, electronic equipment and medium for analyzing ship passing through selected area |
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