CN115565093A - A Quantitative Evaluation Method and System for Air Cruise Reachable Domain of Maritime Aircraft - Google Patents

Abstract

The present invention relates to a quantitative evaluation method and system for the reachable area of maritime aircraft air cruise. The quantitative evaluation system includes a cruise route management module, a cruise target management module, a cruise task management module, a cruise visual domain analysis module, and a cruise coverage evaluation module. . Based on the longitude and latitude coordinates and height information of the flight position of the maritime aircraft, combined with the distribution characteristics of the waters under the jurisdiction of the maritime supervision and the supervision objects, it can realize the spatial quantitative evaluation of the visual domain of a single sortie cruise in the air of the maritime aircraft, and can comprehensively integrate the density of ships in the area and the occurrence of accidents. According to the situation, the type of water area jurisdiction, etc., the regional priority is divided, and it can automatically count and analyze the air cruising intensity of maritime aircraft in different areas within a selected time period, and can automatically adjust the cruising task according to the cruising intensity and regional priority differences, and remind maritime management workers in real time Optimize cruise missions.

Description

A Quantitative Evaluation Method and System for Air Cruise Reachable Domain of Maritime Aircraft

technical field

The invention relates to the technical field of maritime air cruise management, in particular to a quantitative evaluation method and system for the reachable domain of maritime aircraft air cruise.

Background technique

Maritime cruising is an important measure to safeguard my country's maritime rights and interests, ensure the safety of ships' navigation, ensure the safety of important water operations and activities, and monitor the marine environment. As the maritime cruising force with the longest voyage, the widest field of vision and the fastest speed, aircraft undertakes the main work of maritime cruising in my country's COSCO Sea. However, due to the high operating costs and the lack of flexibility of the flight routes, the coverage of aircraft cruises is relatively limited. At the same time, with the government's high-quality development requirements, cruise support funds are becoming increasingly tight, and the number of air cruises cannot be increased. Therefore, aiming at the limited aircraft cruise capability, quantitatively evaluate its air cruise visual area, realize the strength evaluation and accurate coverage of areas with the strongest cruise demand (such as accident-prone, most densely packed ships, and most important waterways), and realize based on visual area The cruise quantitative management of evaluation is of great significance to the development of high-quality cruise supervision with limited funds.

At present, aircraft air cruise management mainly includes three links: cruise plan formulation, cruise mission execution, and cruise coverage evaluation. The cruising plan is based on historical cruising routes combined with the current year's capital budget based on experience. Generally, the regional sea patrol and law enforcement corps will determine more than ten routes, prepare a cruise plan and draw a schematic diagram for release. Due to approval and other reasons, the cruising routes are basically fixed, which are composed of 4-14 coordinate point pairs of varying numbers in series. The cruising frequency of each route is formulated based on experience with reference to trends such as ship collision positions and illegal sewage discharge time and positions in the previous year. Daily cruising management is to carry out cruising tasks according to the cruising plan, and the management personnel of the air patrol brigade will record the flight time of the aircraft on each route, the mileage of a single cruising, and the discovery of illegal acts and their disposal measures, and form a ledger. The evaluation of cruising coverage is mostly based on numerical static statistics such as the total mileage of cruising, the total number of cruising, and the total number of illegal activities found based on ledgers. It lacks quantitative and visual evaluation and expression based on time-space position, and can only use aircraft as a unit to query The flight time, flight mileage, and seized problems of a single sortie can be counted on the total number of flight sorties, time, and mileage. It is impossible to analyze the cruise frequency in a certain period of time in each water area with the space target waters as the core, and to count the cruise intensity distribution. Analyzing the consistency between the distribution of cruising intensity and the distribution of ship density and the distribution of water accidents cannot provide suggestions for the optimization of cruising routes, nor can it automatically calculate and generate tasks according to the adjustment of cruising requirements.

Contents of the invention

The technical problem to be solved by the present invention is to provide a quantitative evaluation method and system for the reachable range of maritime aircraft air cruise in view of the above-mentioned deficiencies.

The present invention is achieved through the following technical solutions:

A method for quantitatively evaluating the reachable domain of maritime aircraft air cruise, the method for quantitatively evaluating comprises the following steps:

(1) Collect the spatial information of the route, mark it spatially, and form the route trajectory;

(2) Using the route track as two-dimensional line space point data, connecting the flight track point data in time order to form two-dimensional line data as the flight route layer;

(3) Using the central projection method, calculate the visible width corresponding to a single node in the route trajectory;

(4) Establish a variable-width buffer zone according to the visible width, and generate the visible area of a single route track;

(5) For multiple flight tracks, assign the number of the flight track to the corresponding visual domain;

(6) Convert the vector data of each field of view into raster data of the smallest spatial unit size;

(7) Superimposing and summing the grid data of the visible domain within the statistical time range, obtaining the cruise frequency on each grid point in the sea area, and obtaining the cruise intensity layer based on the small-scale grid;

(8) Divide the water area supervision area based on ship density, accident distribution, functional category, jurisdiction and rights and interests, and form a cruise target waters layer; superimpose the cruise target waters layer with the cruise intensity layer, According to the cruising target waters layer, the sea area cruise is statistically analyzed, and the coverage area ratio, coverage frequency and proportion of various water areas are obtained.

Further, the quantitative evaluation method, the quantitative evaluation method also includes the following steps:

(9) Present the evaluation results in the form of thematic maps and charts.

Further, in the quantitative evaluation method, in the step (1), the route trajectory is a series of coordinates connected in time order, and the coordinates include the longitude, latitude and altitude of the aircraft at a certain moment.

Further, in the quantitative evaluation method, in the step (2), the two-dimensional line space point data includes the relative height and time of the aircraft,

，Relative height

,

为飞机在

时刻的高度坐标，

为巡航海域高程。in,

for the plane in

the altitude coordinates of the moment,

is the elevation of the cruising sea area.

，Further, in the quantitative evaluation method, in the step (3), the visible width

,

为相机焦距，

为相机成像幅宽，

为飞机在

时刻的相对高度，

为

时刻的可视宽度。in,

is the focal length of the camera,

is the image width of the camera,

for the plane in

the relative height of the moment,

for

The visible width of the moment.

Further, in the quantitative evaluation method, the step (4) also includes:

，a) Calculate route angle

,

、

分别为飞机在

、

时刻的纬度，

、

分别为飞机在

、

时刻的经度；in,

,

respectively for the aircraft in

,

the latitude of the moment,

,

respectively for the aircraft in

,

the longitude of the moment;

b) For the starting point of the route track, make a vertical line connecting the starting point and the second track point, and take the end points of half the visible width of the starting point on both sides of the vertical line as visible Domain boundary point; for the non-starting point, make a vertical line connecting the non-starting point and the previous track point, and take the endpoints of half the visible width of the non-starting point as the visible domain on both sides of the perpendicular foot boundary point;

时刻的可视域左侧边界点坐标（

，

）和可视域右侧边界点坐标（

，

），c) calculate

The coordinates of the left boundary point of the visual domain at the moment (

,

) and the coordinates of the boundary point on the right side of the viewing domain (

,

),

，

，

,

,

，

，

,

,

为飞机在

时刻的纬度，

为飞机在

时刻的经度，

为

时刻的可视宽度；in,

for the plane in

the latitude of the moment,

for the plane in

the longitude of the moment,

for

The visible width of the moment;

d) Connect the left boundary point of the visual domain and the right boundary point of the visual domain in chronological order, and connect the visual domain boundary points on both sides of the first trajectory point, and the visual domain boundary on both sides of the last trajectory point points to form a closed polygon, that is, the viewable domain for generating a single route trajectory.

A quantitative evaluation system for the reachable range of maritime aircraft air cruise, which is used to realize the quantitative evaluation method as described above, the quantitative evaluation system includes a cruise route management module, a cruise target management module, a cruise task management module, and a cruise visual domain Analysis module, cruise coverage evaluation module, wherein,

The cruise route management module is used for comprehensive management of air cruise routes;

The cruise target management module is used for quantitative and comprehensive management of air cruise regulatory targets;

The cruise task management module is used to comprehensively manage the source, plan, execution and evaluation of air cruise tasks;

The cruise visibility analysis module is used to quantify and count the actual coverage strength of air cruise on the ground;

The cruise coverage evaluation module is used to compare the air cruise coverage strength obtained by quantification with the target, and conduct comparative analysis and comprehensive evaluation of the air cruise work.

Further, in the quantitative evaluation system, the cruising route management module includes a cruising route file management module, a cruising route management module, an aircraft position information collection module and a flight log management module; the cruising target management module includes a basic information access module and cruise target classification management module; the cruise task management module includes an annual cruise task maintenance module, a target safety risk warning and temporary flight plan generation module, and a problem finding result recording module.

Further, in the quantitative evaluation system, the basic information access module includes a basic chart management module, a ship AIS position access module, a ship accident information access module, and a water danger information input module.

Further, in the quantitative evaluation system, the cruise visual domain analysis module includes a single sortie cruise visual domain space quantitative analysis module and a single sortie cruise target visual ability space quantitative analysis module; the cruise coverage evaluation module includes cruise Total visibility analysis module, coverage intensity evaluation module for cruise targets and flight log statistics module.

Advantage and effect of the present invention are:

The present invention provides a method and system for quantitative evaluation of the reachable area of maritime aircraft air cruise, based on the latitude and longitude coordinates and height information of the flight position of the maritime aircraft, combined with the distribution characteristics of the waters under the jurisdiction of maritime supervision and the supervision objects, it can realize single air navigation of maritime aircraft. The spatial quantitative evaluation of the visual domain of sorties cruise can comprehensively divide regional ship density, accident occurrence, water area jurisdiction type, etc., and can automatically count and analyze the air cruising intensity of maritime aircraft in different regions within a selected time period. Cruise intensity and regional priority differences automatically adjust cruise tasks, and remind maritime management workers to optimize cruise tasks in real time. The invention can effectively make up for the lack of decision-making support for the existing maritime air cruising plan, avoid blind cruising, repeated cruising, and missed cruising, and better improve the effectiveness of cruising.

Description of drawings

Fig. 1 shows the technical route flowchart of the quantitative evaluation method of the maritime aircraft air cruise reachable domain provided by the present invention;

Figure 2 shows a schematic diagram of calculating the visible width of Embodiment 1 of the quantitative evaluation method provided by the present invention;

FIG. 3 shows a schematic diagram of the computing visual domain of Embodiment 1 provided by the present invention;

Figure 4 shows a superimposed schematic diagram of step (7) of Example 1 provided by the present invention;

Figure 5 shows a superimposed schematic diagram of step (8) of Example 1 provided by the present invention;

Fig. 6 shows the tabular diagram of the quantitative evaluation result of embodiment 1 provided by the present invention;

Fig. 7 shows a pie chart of the quantitative evaluation results of Example 1 provided by the present invention.

detailed description

In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

Aiming at the current evaluation and management of the air cruise coverage of maritime aircraft, which is mainly based on traditional static statistics, the present invention proposes a quantitative evaluation method and system based on the quantification and visualization of the space-time position of the maritime aircraft air cruise. Air cruising focuses on space target areas and key cruising targets. It can analyze the annual cruising frequency of each water area, count the distribution of cruise coverage intensity of various water areas and targets in the jurisdiction, and quantitatively analyze the distribution of cruising intensity, ship density distribution, and water accident distribution. Consistency, and can provide suggestions for the optimization of cruising routes, automatically calculate and generate tasks according to the adjustment of cruising requirements.

Fig. 1 shows the technical route flowchart of the quantitative evaluation method of the maritime aircraft air cruise reachable domain provided by the present invention, and this quantitative evaluation method comprises the following steps:

，

，

），其中，

、

和

分别为飞机在

时刻的经度、纬度和高度（海拔高度）坐标。(1) Collect the spatial information of the route, mark it spatially, and form the route trajectory. The route trajectory is a series of coordinates connected in chronological order (

,

,

),in,

,

and

respectively for the aircraft in

The longitude, latitude, and altitude (altitude) coordinates of the instant.

时刻的相对高度

，Calculate the plane in

relative height of time

,

为飞机在

时刻的高度坐标，

为巡航海域高程。in,

for the plane in

the altitude coordinates of the moment,

is the elevation of the cruising sea area.

(2) Take the trajectory coordinate sequence data of the airline trajectory as two-dimensional line space point data P ₀ , P ₁ , P ₂ , ... P _n , and the attributes of each two-dimensional line space point data include the relative altitude and time of the aircraft, according to The time sequence connects the flight track point data to form two-dimensional line data as the flight route layer.

。(3) Use the central projection method, as shown in Figure 2, to calculate the visible width corresponding to a single node S in the aircraft's route trajectory

.

，

,

为相机焦距，

为相机成像幅宽，

为飞机在

时刻的相对高度，

为

时刻的可视宽度。in,

is the focal length of the camera,

is the image width of the camera,

for the plane in

the relative height of the moment,

for

The visible width of the moment.

(4) Establish a variable-width buffer zone according to the visible width to generate the visible domain of a single flight track. Specifically, as shown in FIG. 3 .

时刻和

时刻的轨迹坐标，计算航线角度

。a) based on

moment and

The track coordinates at the time, calculate the route angle

.

，

,

为反正切函数，

、

分别为飞机在

、

时刻的纬度，

、

分别为飞机在

、

时刻的经度。in,

is the arctangent function,

,

respectively for the aircraft in

,

the latitude of the moment,

,

respectively for the aircraft in

,

The longitude of the moment.

，在起始点与第二个轨迹点连线的垂线上的垂足两侧分别取

/2的长度线段，该线段两端的端点作为该起始点的可视域边界点；非起始点（

时刻的轨迹点）的可视宽度为

，在该轨迹点与前一个轨迹点连线的垂线上的垂足两侧分别取

/2的长度线段，该线段两端的端点作为该轨迹点的可视域边界点。

为

时刻的可视宽度，

即为

时刻的可视宽度。b) For the starting point of the route track, make a vertical line connecting the starting point and the second track point, and take the end points of half the visible width of the starting point on both sides of the vertical line as visible Domain boundary point; for the non-starting point, make a vertical line connecting the non-starting point and the previous track point, and take the endpoints of half the visible width of the non-starting point on both sides of the vertical line as the visible domain boundary point. That is, the visible width of the starting point is

, take the two sides of the vertical foot on the vertical line connecting the starting point and the second trajectory point respectively

/2 length line segment, the end points of the two ends of the line segment are used as the boundary points of the visual domain of the starting point; non-starting points (

The visible width of the trajectory point at time is

, take the two sides of the vertical foot on the vertical line connecting the track point and the previous track point respectively

/2 length line segment, the endpoints of the two ends of the line segment are used as the boundary points of the visual domain of the track point.

for

the visible width of the moment,

that is

The visible width of the moment.

时刻的可视域左侧边界点坐标（

，

）和可视域右侧边界点坐标（

，

）。c) calculate

The coordinates of the left boundary point of the visual domain at the moment (

,

) and the coordinates of the boundary point on the right side of the viewing domain (

,

).

，

，

,

,

，

，

,

,

为正弦函数，

为余弦函数，

为飞机在

时刻的纬度，

为飞机在

时刻的经度，

为

时刻的可视宽度。in,

is a sine function,

is the cosine function,

for the plane in

the latitude of the moment,

for the plane in

the longitude of the moment,

for

The visible width of the moment.

，

）和可视域右侧边界点（

，

），并分别连接第一个轨迹点两侧的可视域边界点，和最后一个轨迹点两侧的可视域边界点，形成一个封闭的多边形，即生成单条航线轨迹的可视域。d) Connect the left boundary points of the visual domain respectively in chronological order (

,

) and the right boundary point of the viewing domain (

,

), and respectively connect the boundary points of the visual domain on both sides of the first trajectory point and the boundary points of the visual domain on both sides of the last trajectory point to form a closed polygon, that is, the visual domain of a single route trajectory.

(5) Generate a corresponding viewable area for each route track according to step (4), and assign the number of the route track to the corresponding viewable area for the route track.

(6) Select the smallest space unit based on cruising visual experience and actual needs. Treat each visual domain as a layer, and convert its vector data into raster data with the smallest spatial unit size. A value of 1 is assigned to grids within the range of the viewable area, and a value of 0 is assigned to grids outside the range of the viewable area.

(7) Set the statistical time range, such as day, week, ten-day, month, season, year, etc., as shown in Figure 4, superimpose and sum the raster data of the visible domain within the statistical time range to obtain the The cruise frequency on each grid point is used to obtain the cruise intensity layer based on the small-scale grid.

(8) As shown in Figure 5, the water area supervision area is divided by comprehensive ship density, accident distribution, functional category, jurisdictional attribution and rights and interests category to form a cruise target waters layer; the cruise target waters layer and the cruise intensity layer are compared Overlaying, statistical analysis of sea area cruises is carried out according to the cruising target waters layer, and the coverage area ratio, coverage frequency and proportion of various water areas (that is, the divided water area supervision areas) are obtained.

(9) Display the evaluation results in the form of thematic maps and icons. Figures 6 and 7 show the tabular chart and pie chart of the quantitative evaluation results of Example 1 provided by the present invention.

The quantitative evaluation system for realizing the quantitative evaluation method includes a cruise route management module, a cruise target management module, a cruise task management module, a cruise visual area analysis module, and a cruise coverage evaluation module.

(1) The cruise route management module is used for comprehensive management of air cruise routes. Cruise management workers can use the cruise route management module to manage the historical route files used in the flight, and can form and edit route plans based on historical routes and work tasks of the year. The real-time position and altitude during the flight can also be integrated and displayed through the cruise route management module. The cruise route management module also provides log management functions for the entire process of previous air cruises.

The cruise route management module includes a cruise route file management module, a cruise route management module, an aircraft position information collection module and a flight log management module.

The cruise route file management module is used to import historical flight route coordinate points to complete the initialization of historical routes, real-time connection and access to new cruise routes generated year by year.

The cruising route management module is used to access the historical flight routes in cruising management, and access the current cruising target water area division, ship density, accident distribution and other data in cruising target management. Maritime and air patrol management workers can make flight plans according to the analysis results. Adjustment.

The aircraft position information acquisition module is used to complete the acquisition of the aircraft's flight space position, and obtain the longitude, latitude and altitude of the flight position at a certain time interval during the flight.

The navigation log management module is used to complete the records of the cruise start time, cruise end time, cruise operator, cruise route number, case discovery, etc. of maritime air cruise.

(2) The cruise target management module is used for quantitative and comprehensive management of air cruise regulatory targets. The cruise target management module is connected to basic information such as basic charts and AIS positions of ships, and can classify cruise targets in different waters and different ground objects according to different regulatory requirements.

The cruise target management module includes a basic information access module and a cruise target hierarchical and classified management module.

The basic information access module includes the basic chart management module, the ship AIS position access module, the ship accident information access module and the water danger information input module.

The cruising target classification management module is used for comprehensive classification according to the jurisdiction of the water area and the distribution of the above-mentioned water traffic elements. There are three dimensions in the spatial division of jurisdictional waters. In the dimension of functional attributes, in the waters directly under the jurisdiction of the maritime administrative agency, the scope of elements such as waterways, anchorages, bridges, no-navigation areas, and operating areas are drawn according to the main routing system of the jurisdiction. In the dimension of rights and interests, the scope of internal water, territorial sea, contiguous zone and exclusive economic zone is formed according to the basic points of territorial sea announced by my country. Jurisdiction attribute dimension, according to the jurisdiction announced by each maritime bureau, delineates the scope of each branch maritime management agency, directly affiliated maritime management agency and management triangle. This system combines the above dimensions, and analyzes according to key waters (navigation elements are delineated by the route-setting system), other waters in internal waters, territorial sea, contiguous zone and exclusive economic zone.

(3) The cruise task management module is used to comprehensively manage the source, planning, execution and evaluation of air cruise tasks. Specifically realize the comprehensive management of annual cruises, missions based on target safety risk warnings, temporary flight missions, etc. The patrol task management module also provides air patrol management workers with the functions of marking key patrol waters and recording the results of problems found.

The cruise task management module includes the annual cruise task maintenance module, the target safety risk warning and temporary flight plan generation module, the key patrol water area marking module and the problem detection result recording module.

The annual cruising task maintenance module is used to connect to the law enforcement-related systems of the maritime system, provide task preparation functions, and complete the aggregation and unified management of multi-source tasks.

The target safety risk early warning and temporary flight plan generation module is used to access the basic data of the cruising target management module. The situation and other special tasks automatically generate cruise tasks. When the real-time data exceeds the safety risk warning threshold set by the system, a cruise plan modification warning is proposed and sent to the temporary cruise route management to remind maritime management workers to adjust the cruise task in real time.

The maritime information labeling module is used to complete the labeling and maintenance of the information discovered and collected during the execution of cruise missions. Including maritime navigation environment, navigation order, ship navigation, berthing operations, etc., which are related to obstructive fishing nets, strategic islands and reefs, places where illegal incidents frequently occur, places where high-risk ships gather, and places where commercial and fishing vessels meet, etc., are the focus of maritime air cruise supervision. The collection content mainly includes water area category, location, time range as key inspections, inspection level, etc.

The seized problem result recording module is used to complete the file preservation of the cases seized during the execution of the cruise mission. Including the situation of the seized problem, the time of the seizure, the law enforcement personnel, the ship involved, the type of case, and the management of audio and video information. The types of problems seized include failure to open AIS normally, undeclared offshore liquid cargo transfer, non-anchor anchorage, undeclared oil supply and receiving operations, undeclared oil and sewage recovery operations, illegal towing, undeclared waterwork operations, over-navigation Area navigation, navigation without prescribed routes, dredging ships that did not arrive at the prescribed waters to throw mud, etc.

(4) The cruise visibility analysis module is used to quantify and count the actual coverage intensity of the air cruise on the ground. Specifically, it provides a single sortie cruising visual domain spatial quantitative analysis module and a single cruising target visual ability spatial quantitative analysis module.

The cruise visibility analysis module includes a single sortie cruise visibility space quantitative analysis module and a single sortie cruise target visibility space quantitative analysis module.

The spatial quantitative analysis module of single sortie cruising visual domain is used to access the acquisition of aircraft position information. Through the obtained aircraft latitude, longitude and altitude information, based on the quantitative evaluation method of maritime aircraft air cruise visual domain proposed in this paper, the single sortie of maritime aircraft in the air can be realized. Spatial quantitative evaluation of the cruise visual domain, to obtain the coverage of the cruise target by a single cruise.

The spatial quantitative analysis module of the visual capability of a single cruise target is used to access the spatial quantitative analysis results of the visual domain of a single cruise and the basic information of the cruise target within the flight time, and obtain the coverage area of various waters and ships in various waters in a single sortie Spatial quantitative analysis results such as accident coverage percentage and so on.

(5) The cruise coverage evaluation module is used to compare the quantified air cruise coverage strength with the target, conduct comparative analysis and comprehensive evaluation of the air cruise work. Specifically, it provides annual (quarterly, monthly) cruise total visibility analysis, coverage strength evaluation module for cruise targets, and flight log statistics.

The cruise coverage evaluation module includes the annual (quarterly, monthly) cruise total visibility analysis module, the coverage intensity evaluation module for cruise targets and the flight log statistics module.

The cruise total visual area analysis module is used to access the quantitative analysis results of single sortie visual area space and flight records. Based on the quantitative evaluation method of maritime aircraft air cruise visual area proposed in this paper, the annual cruise total visual area is obtained.

The coverage intensity evaluation module for cruising targets is used to combine the distribution of water targets in the cruising time period to calculate the coverage area of various waters in the jurisdiction, the coverage percentage of ships and accidents in various waters, etc., and automatically count and analyze regional maritime incidents within the selected time period. Aircraft cruise strength.

The flight log statistics module is used for basic flight statistics, such as flight sorties, total flight mileage, and total flight time.

The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the implementation scope of the present invention. All equivalent changes and modifications made within the protection scope of the present invention shall be deemed to fall within the protection scope of the present invention.

Claims (10)

1. A quantitative evaluation method of maritime aircraft air cruise reachable domain, it is characterized in that, this quantitative evaluation method comprises the following steps: (1) Collect the spatial information of the route, mark it spatially, and form the route trajectory; (2) Using the route track as two-dimensional line space point data, connecting the flight track point data in time order to form two-dimensional line data as the flight route layer; (3) Using the central projection method, calculate the visible width corresponding to a single node in the route trajectory; (4) Establish a variable-width buffer zone according to the visible width, and generate the visible area of a single route track; (5) For multiple flight tracks, assign the number of the flight track to the corresponding visual domain; (6) Convert the vector data of each field of view into raster data of the smallest spatial unit size; (7) Superimposing and summing the grid data of the visible domain within the statistical time range, obtaining the cruise frequency on each grid point in the sea area, and obtaining the cruise intensity layer based on the small-scale grid; (8) Divide the water area supervision area based on ship density, accident distribution, functional category, jurisdiction and rights and interests, and form a cruise target waters layer; superimpose the cruise target waters layer with the cruise intensity layer, According to the cruising target waters layer, the sea area cruise is statistically analyzed, and the coverage area ratio, coverage frequency and proportion of various water areas are obtained. 2. Quantitative evaluation method according to claim 1, is characterized in that, this quantitative evaluation method also comprises the following steps: (9) Present the evaluation results in the form of thematic maps and charts. 3. The quantitative evaluation method according to claim 1, characterized in that, in the step (1), the route trajectory is a series of coordinates connected in chronological order, and the coordinates include the location of the aircraft at a certain moment Longitude, latitude and altitude. 4. The quantitative evaluation method according to claim 1, characterized in that, in the step (2), the two-dimensional line space point data includes the relative altitude and time of the aircraft, Relative height

, in,

for the plane in

the altitude coordinates of the moment,

is the elevation of the cruising sea area. 5. The quantitative evaluation method according to claim 1, characterized in that, in the step (3), the visible width

, in,

is the focal length of the camera,

is the image width of the camera,

for the plane in

the relative height of the moment,

for

The visible width of the moment. 6. The quantitative evaluation method according to claim 1, characterized in that the step (4) further comprises: a) Calculate route angle

, in,

,

respectively for the aircraft in

,

the latitude of the moment,

,

respectively for the aircraft in

,

the longitude of the moment; b) For the starting point of the route track, make a vertical line connecting the starting point and the second track point, and take the end points of half the visible width of the starting point on both sides of the vertical line as visible Domain boundary point; for the non-starting point, make a vertical line connecting the non-starting point and the previous track point, and take the endpoints of half the visible width of the non-starting point on both sides of the vertical line as the visible domain boundary point; c) calculate

The coordinates of the left boundary point of the visual domain at the moment (

,

) and the coordinates of the boundary point on the right side of the viewing domain (

,

),

,

,

,

in,

for the plane in

the latitude of the moment,

for the plane in

the longitude of the moment,

for

The visible width of the moment; d) Connect the left boundary point of the visual domain and the right boundary point of the visual domain in chronological order, and connect the visual domain boundary points on both sides of the first trajectory point, and the visual domain boundary on both sides of the last trajectory point points to form a closed polygon, that is, the viewable domain for generating a single route trajectory. 7. A quantitative evaluation system of maritime aircraft air cruise reachable domain, for realizing the quantitative evaluation method according to any one of claims 1-6, characterized in that, the quantitative evaluation system includes a cruise route management module, a cruise Target management module, cruise task management module, cruise visibility analysis module, cruise coverage evaluation module, wherein, The cruise route management module is used for comprehensive management of air cruise routes; The cruise target management module is used for quantitative and comprehensive management of air cruise regulatory targets; The cruise task management module is used to comprehensively manage the source, plan, execution and evaluation of air cruise tasks; The cruise visibility analysis module is used to quantify and count the actual coverage strength of air cruise on the ground; The cruise coverage evaluation module is used to compare the air cruise coverage strength obtained by quantification with the target, and conduct comparative analysis and comprehensive evaluation of the air cruise work. 8. The quantitative evaluation system according to claim 7, wherein the cruising route management module comprises a cruising route file management module, a cruising route management module, an aircraft position information collection module and a flight log management module; the cruising target The management module includes a basic information access module and a classification and classification management module for cruise targets; the cruise task management module includes an annual cruise task maintenance module, a target safety risk warning and temporary flight plan generation module, and a problem finding result recording module. 9. The quantitative evaluation system according to claim 8, wherein the basic information access module includes a basic chart management module, a ship AIS position access module, a ship accident information access module and a water danger information input module . 10. Quantitative evaluation system according to claim 7, is characterized in that, described cruising visibility domain analysis module comprises single sortie cruising visual range space quantification analysis module and single sortie cruising target visual ability space quantification analysis module; The cruise coverage evaluation module includes a cruise total visibility analysis module, a coverage intensity evaluation module for cruise targets and a flight log statistics module.

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