CN111753703B - Monitoring system and monitoring method for urban land boundary - Google Patents
Monitoring system and monitoring method for urban land boundary Download PDFInfo
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Abstract
The invention relates to a monitoring method of town land boundaries, which comprises the following steps: step S1, controlling the unmanned aerial vehicle to fly along the town boundary in response to user operation, acquiring a flight route of the unmanned aerial vehicle and taking the flight route of the unmanned aerial vehicle as a demarcation basis to demarcate a town area; step S2: repeating the step S1 at intervals to obtain town areas in different time periods; and calling out town areas in two different time periods, separating out boundaries in the town areas with early acquisition time, and configuring the separated boundaries in the town areas with late acquisition time to obtain a boundary comparison map. Two boundaries in different time periods are put together for comparison, and the change of the boundary is intuitively displayed, so that a user can clearly know the development of towns; and the town area is flexible to select, a series of boundary comparison maps can be formed, analysis of town development trend is facilitated, and follow-up planning of town development is facilitated.
Description
Technical Field
The invention relates to the technical field of map mapping, in particular to a monitoring system and a monitoring method for urban land boundaries.
Background
In the rapid development period of township in China, in the process of advancing township, effective management and control on town expansion are lacking, and most of town development shows out-of-order expansion of spreading cakes, so that ecological green land spaces such as agricultural land, forests and the like are greatly reduced, and land resource utilization structure is unreasonable.
Therefore, a boundary dynamic monitoring technology based on town land development and utilization needs to be developed, the town expansion condition is accurately mastered, the subsequent planning of town development is facilitated, and the rationality of town planning is improved.
Disclosure of Invention
Aiming at the defects existing in the prior art, one of the purposes of the invention is to provide a monitoring method for the land boundaries of towns, which has the advantage of conveniently knowing the change condition of the boundaries.
The above object of the present invention is achieved by the following technical solutions: a monitoring method of town land boundaries comprises the following steps:
Step S1, controlling the unmanned aerial vehicle to fly along the town boundary in response to user operation, acquiring a flight route of the unmanned aerial vehicle and taking the flight route of the unmanned aerial vehicle as a demarcation basis to demarcate a town area;
Step S2: repeating the step S1 at intervals to obtain town areas in different time periods;
And calling out town areas in two different time periods, separating out boundaries in the town areas with early acquisition time, and configuring the separated boundaries in the town areas with late acquisition time to obtain a boundary comparison map.
By adopting the technical scheme, two boundaries in different time periods are put together for comparison, and the change of the boundaries is intuitively shown, so that a user can clearly know the development of towns; and the town area is flexible to select, a series of boundary comparison maps can be formed, analysis of town development trend is facilitated, and follow-up planning of town development is facilitated.
The present invention may be further configured in a preferred example to: before the town area is stored, the following operations are also needed:
selecting two points in the boundary of the town area, and calculating the simulated distance difference of the two points on the town area;
measuring the actual distance difference between the two selected points;
converting the actual distance difference into the distance difference to be set according to the proportion;
The simulated distance difference of the town area reaches the set distance difference in a scaling mode.
By adopting the technical scheme, the final town area is formed according to the same proportion, the town area can be directly retrieved when the boundary comparison map is required to be manufactured, and the two town areas do not need to be subjected to additional specification transformation, so that the change of towns can be intuitively and accurately known even if the boundary comparison map is not manufactured and the town area is directly read according to the acquisition time.
The present invention may be further configured in a preferred example to: the configuration process comprises the following steps: selecting any two points on the boundary with early acquisition time, acquiring corresponding geographic information coordinates, finding out the corresponding two points on the town area with late acquisition time according to the geographic information coordinates, copying the boundary to the town area with late acquisition time, and adjusting the positions of the copied boundary to enable the two points on the copied boundary to coincide with the two points on the town area with late acquisition time respectively.
By adopting the technical scheme, the points for positioning are firstly acquired on the town area with the late acquisition time through the actual geographic information coordinates, and then the two corresponding points are overlapped one by one, so that the positions of the copied boundaries are ensured to be consistent with the positions of the actual boundaries, and the errors of the boundary comparison map are avoided.
The present invention may be further configured in a preferred example to: the change area of towns is displayed in the boundary comparison map, and the calculation method of the change area of the specific towns is as follows:
If no intersection exists between the boundary with the early acquisition time and the boundary with the late acquisition time, respectively calculating the areas in the two boundaries, wherein the difference value of the two areas is the change area of the town;
If the boundary with early acquisition time and the boundary with late acquisition time have a junction, a first area and a second area are divided on the boundary comparison map, wherein the first area is an area which is positioned in the boundary with early acquisition time and is not positioned in the boundary with late acquisition time, the second area is an area which is positioned in the boundary with late acquisition time and is not positioned in the boundary with early acquisition time, the actual areas of the first area and the second area are calculated respectively and are used as the change areas of towns together, and the numerical value in the first area takes a negative value.
By adopting the technical scheme, the change condition of cities and towns is more intuitively represented in a numerical mode, particularly when a plurality of boundary comparison maps are manufactured, whether the development speed of the cities and towns is faster or smoother can be analyzed through the change condition of the change area of the cities and towns, for example, the change area of the cities and towns is increased year by year, and then the development of the cities and towns is accelerated.
A second object of the present invention is to provide a monitoring system for town land boundaries, which has the advantage of facilitating monitoring of the development of the boundaries.
The second object of the present invention is achieved by the following technical solutions: the monitoring system for the urban land boundary comprises an unmanned aerial vehicle and a ground monitoring platform, wherein a camera device is arranged on the unmanned aerial vehicle, and the ground monitoring platform comprises a remote control module, an image acquisition module, a map building module and a comparison module;
the remote control module is used for controlling the unmanned aerial vehicle to carry out aerial photography based on the operation of a user and acquiring a flight line of the unmanned aerial vehicle;
The image acquisition module is used for acquiring a remote sensing image shot by the unmanned aerial vehicle;
The map building module is used for defining a town area according to a flight line of the unmanned aerial vehicle;
The comparison module is controlled by a user's selection operation to obtain two selected town areas and form a boundary comparison map.
Through adopting above-mentioned technical scheme, the user can use remote control module to control unmanned aerial vehicle to take photo by plane to the town in order to obtain the remote sensing image regularly, and the map is established to the reuse map and is set up the town area, when needs analysis town development condition, the user obtains the boundary comparison map that can embody the town change more through comparison module, conveniently monitors the development of town.
The present invention may be further configured in a preferred example to: the remote control module has a manual mode and an automatic mode,
In a manual mode, the remote control module is controlled by a user to send a flight instruction to the unmanned aerial vehicle;
In the automatic mode, the remote control module sends flight instructions to the drone according to a predetermined flight path.
The present invention may be further configured in a preferred example to: the comparison module comprises a time period acquisition unit, a map selection unit and a configuration unit;
The time period acquisition unit is used for forming a time interval according to the starting time and the ending time input by the user and transmitting the time interval to the map selection unit;
The map selection unit is used for comparing whether the acquisition time of the town area is in the time interval or not so as to brush out all the town areas with the acquisition time in the time interval, and if a plurality of town areas are in the time interval, the map selection unit selects the town areas with the two acquisition times closest to the starting time and the ending time respectively;
The configuration unit is used for copying the boundary of the town area closest to the starting time selected by the map selection unit, and then covering the copied boundary on the town area closest to the ending time to form a boundary comparison map.
The present invention may be further configured in a preferred example to: the comparison module also comprises an identification unit, a first area calculation unit and a second area calculation unit,
The identification unit is used for judging whether two boundaries on the boundary comparison map have intersection or not, if the two boundaries do not have intersection, the identification unit sends a starting instruction to the first area calculation unit, and if the two boundaries have intersection, the identification unit sends a starting instruction to the second area calculation unit;
the first area calculating unit is used for calculating the areas in the two boundaries in the boundary comparison map and calculating the difference value of the two areas;
the second area calculation unit is used for dividing a first area and a second area on the town area and calculating the areas of the first area and the second area respectively.
In summary, the present invention includes at least one of the following beneficial technical effects:
1. Recording the scale of towns by periodically acquiring remote sensing images and establishing town areas, and providing data for the subsequent development of towns;
2. by establishing a boundary comparison map, the development condition of the town scale is intuitively embodied, and the planning work of towns is further facilitated;
3. The change area of the boundary in the boundary comparison map is calculated, the development of town scale is represented in a digital form, and the development trend of towns is conveniently analyzed by using a mathematical calculation mode.
Drawings
FIG. 1 is a schematic diagram of a first embodiment;
FIG. 2 is a schematic diagram of a second embodiment;
FIG. 3 is a schematic diagram III of the first embodiment;
fig. 4 is a schematic overall structure of the second embodiment.
In the figure, 1, an unmanned plane; 2. a ground monitoring platform; 3. a remote control module; 4. an image acquisition module; 5. a map building module; 6. a comparison module; 61. a time period acquisition unit; 62. a map selection unit; 63. a configuration unit; 64. an identification unit; 65. a first area calculation unit; 66. and a second area calculating unit.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Embodiment one: the invention discloses a monitoring method of town land boundaries, as shown in fig. 1, comprising the following steps:
and step S1, controlling the unmanned aerial vehicle 1 to fly along the town boundary in response to user operation, acquiring a flight route of the unmanned aerial vehicle 1 and taking the flight route of the unmanned aerial vehicle 1 as a demarcation basis to demarcate a town area.
Step S2: step S1 is repeated at intervals to obtain town areas in different time periods.
And step S3, uniformly adjusting the specification of the town area and storing according to the acquisition time.
And S4, according to the selection of a user, two town areas for comparison are taken out and a boundary comparison map is formed.
And S5, calculating the change area of the boundary on the boundary comparison map.
Further, the specific steps of establishing the town area each time are as follows:
The user controls unmanned aerial vehicle 1to take photo by plane along actual city boundary, and the remote sensing image that unmanned aerial vehicle 1 took photo by plane simultaneously shows for the user to see, and the user can in time adjust unmanned aerial vehicle 1's navigation direction according to the distribution of town boundary in the remote sensing image to guarantee that unmanned aerial vehicle 1 can fly along city boundary all the time, after unmanned aerial vehicle 1 has flown along city boundary entirely one complete circle, unmanned aerial vehicle 1's flight route is corresponding confined circle too. And the GPS positioning device on the unmanned aerial vehicle 1 is utilized to record the flight line of the unmanned aerial vehicle 1 so as to conveniently define the town area.
In this embodiment, after the town area is well defined, the boundaries of the town area and the electronic map can be combined, so that each position in the town area can be conveniently positioned, and the geographic information coordinates of each point in the town area can be easily obtained.
Referring to fig. 2, further, the specific operation of adjustment of the town area specifications is as follows:
S31, arbitrarily selecting two points in the boundary of the town area, and calculating the simulation distance difference of the two points on the town area.
S32, calling out the geographic information coordinates of the selected points, and calculating the actual distance difference between the two points according to the geographic information coordinates.
S32, converting the actual distance difference into the distance difference to be set according to the proportion, wherein the proportion is a value set by a user and is suitable for adjusting the specification of all town areas, and the distance difference is equal to the actual distance difference divided by the proportion.
S32, scaling the town area according to the ratio of the simulated distance difference to the distance difference to be set, and completing scaling to obtain the simulated distance difference between two points on the town area to be set.
Referring to fig. 3, further, the specific steps for creating the boundary comparison map are as follows:
S41, calling out two town areas with different acquisition times according to input operation of a user.
In this embodiment, the user may directly select two town areas with two acquisition times, or may input a time range, and the town areas with two acquisition times within the time range and respectively near the start time and the end time of the time range may be automatically selected. If there is only one town area satisfying the condition or there is no town area within the time frame, the user needs to reenter a new time frame.
S42, arbitrarily selecting two points on the boundary with early acquisition time and obtaining geographic information coordinates on corresponding points, and marking the corresponding two points on the town area with late acquisition time through the geographic information coordinates, wherein the selected points are required to be ensured to be positioned on the boundary with early acquisition time and in the town area with late acquisition time.
S43, copying the boundary in the town area with the early acquisition time into the town area with the late acquisition time, and adjusting the position of the copied boundary to enable two points on the copied boundary to coincide with two points in the town area with the late acquisition time respectively, so that a boundary comparison map is formed.
In the boundary comparison map, there are three cases of full expansion, full contraction, and partial expansion and partial contraction by comparison of two boundaries. The area of the boundary change can be calculated in different ways according to different conditions.
If the boundary is fully expanded or fully contracted along with the time change, the two boundaries are not intersected, the areas in the two boundaries are calculated respectively, the difference value of the two areas is the change area of the town, and the difference value of the fully expanded state takes a positive value, so that the area of the town is increased; the difference in the fully contracted state takes a negative value, indicating that the area of the town is reduced.
If the situation that part of the expansion part is contracted in the boundary exists, a junction exists between the two boundaries, a first area and a second area are divided on the boundary comparison map, wherein the first area is an area which is not covered on a town area with a later acquisition time in the boundary with an earlier acquisition time, the second area is an area which is not located in the boundary with the earlier acquisition time in the boundary with the later acquisition time, the actual areas of the first area and the second area are calculated respectively and are used as the change areas of towns together, the numerical value in the first area takes a negative value, and the numerical value in the second area takes a positive value.
Embodiment two: referring to fig. 4, a monitoring system for urban land boundaries comprises an unmanned aerial vehicle 1 and a ground monitoring platform 2, wherein a camera device, a GPS positioning device and a communication device for realizing signal transmission are arranged on the unmanned aerial vehicle 1. The ground monitoring platform 2 comprises a remote control module 3, an image acquisition module 4, a map building module 5 and a comparison module 6, wherein the remote control module sends a flight command to the communication device to control the flight line of the unmanned aerial vehicle 1, the camera device transmits a shot image to the image acquisition module 4 through the communication device, and the image acquisition module 4 displays the image again.
The remote control module 3 is used for controlling the unmanned aerial vehicle 1 to take photo by plane. The remote control module 3 has a manual mode and an automatic mode. In manual mode, the remote control module 3 is operated by the user to send flight instructions to the drone 1. The user can observe actual town boundary according to the real-time image that shows in the image acquisition module 4, and the rethread remote control module 3 constantly sends the flight instruction to unmanned aerial vehicle 1, makes unmanned aerial vehicle 1 constantly adjust flight direction and speed according to the flight instruction so that unmanned aerial vehicle 1 can fly along actual town boundary all the time, and unmanned aerial vehicle 1's flight route passes through GPS positioner and records and transmits in the map setting up module 5. The flight path of the unmanned aerial vehicle 1 must be a closed loop. In the automatic mode, the remote control module 3 sends a flight command to the unmanned aerial vehicle 1 according to a predetermined flight line, so that the unmanned aerial vehicle 1 can automatically fly. When the town area is confirmed, the remote control module 3 can be switched to an automatic mode, so that the unmanned aerial vehicle 1 shoots town images in the town area.
The map building module 5 is controlled by user operation and defines a town area according to the flight route of the unmanned aerial vehicle 1.
The comparison module 6 is used for forming a boundary comparison map according to user operation. The comparison module 6 includes a period acquisition unit 61, a map selection unit 62, a configuration unit 63, an identification unit 64, a first area calculation unit 65, and a second area calculation unit 66.
The time period acquisition unit 61 is configured to form a time period according to the start time and the end time input by the user, and transmit the time period to the map selection unit 62.
The map selecting unit 62 is configured to compare whether the acquisition time of the town area is within the time interval, so as to brush out all town areas with the acquisition time within the time interval, and if there are a plurality of town areas within the time interval, the map selecting unit 62 selects the town areas with the two acquisition times closest to the start time and the end time respectively.
The configuration unit 63 is configured to copy the boundary of the town area closest to the start time selected by the map selection unit 62, and then overlay the copied boundary on the town area closest to the end time to form a boundary comparison map.
The identifying unit 64 is configured to determine whether there is a junction between two boundaries on the boundary comparison map, and if there is no junction, the identifying unit 64 sends a start instruction to the first area calculating unit 65, and if there is a junction, the identifying unit 64 sends a start instruction to the second area calculating unit 66; the first area calculating unit 65 is configured to calculate an area in two boundaries in the boundary comparison map, and calculate a difference between the two areas; the second area calculation unit 66 is configured to divide a first area and a second area on a town area, and calculate areas of the first area and the second area, respectively.
The embodiments of the present invention are all preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.
Claims (5)
1. The monitoring method of the urban land boundary is characterized by comprising the following steps of:
Step S1, controlling the unmanned aerial vehicle (1) to fly along the town boundary in response to user operation, acquiring a flight route of the unmanned aerial vehicle (1) and taking the flight route of the unmanned aerial vehicle (1) as a demarcation basis to demarcate a town area;
Step S2: repeating the step S1 at intervals to obtain town areas in different time periods;
The method comprises the steps of calling out town areas in two different time periods, separating boundaries in the town areas with early acquisition time, and configuring the separated boundaries in the town areas with late acquisition time to obtain a boundary comparison map;
Before the town area is stored, the following operations are also needed:
selecting two points in the boundary of the town area, and calculating the simulated distance difference of the two points on the town area;
measuring the actual distance difference between the two selected points;
converting the actual distance difference into the distance difference to be set according to the proportion;
the simulated distance difference of the town area is enabled to reach the distance difference to be set in a zooming mode;
The configuration process comprises the following steps: selecting any two points on the boundary with early acquisition time, acquiring actual geographic information coordinates, finding out corresponding two points on the town area with late acquisition time according to the geographic information coordinates, copying the boundary to the town area with late acquisition time, and adjusting the positions of the copied boundary to enable the two points on the copied boundary to coincide with the two points on the town area with late acquisition time respectively.
2. A method for monitoring town land boundaries as claimed in claim 1, wherein: the change area of towns is displayed in the boundary comparison map, and the calculation method of the change area of the specific towns is as follows:
If no intersection exists between the boundary with the early acquisition time and the boundary with the late acquisition time, respectively calculating the areas in the two boundaries, wherein the difference value of the two areas is the change area of the town;
If the boundary with early acquisition time and the boundary with late acquisition time have a junction, a first area and a second area are divided on the boundary comparison map, wherein the first area is an area which is positioned in the boundary with early acquisition time and is not positioned in the boundary with late acquisition time, the second area is an area which is positioned in the boundary with late acquisition time and is not positioned in the boundary with early acquisition time, the actual areas of the first area and the second area are calculated respectively and are used as the change areas of towns together, the numerical value in the first area takes a negative value, and the numerical value of the first area represents the area quantity which is reduced along with the time in the boundary of towns.
3. A monitoring system for urban land boundaries is characterized in that: the system comprises an unmanned aerial vehicle (1) and a ground monitoring platform (2), wherein a camera device is arranged on the unmanned aerial vehicle (1), and the ground monitoring platform (2) comprises a remote control module (3), an image acquisition module (4), a map building module (5) and a comparison module (6);
The remote control module (3) is used for controlling the unmanned aerial vehicle (1) to carry out aerial photography based on the operation of a user and acquiring a flight line of the unmanned aerial vehicle (1);
the image acquisition module (4) is used for acquiring a remote sensing image shot by the unmanned aerial vehicle (1);
The map building module (5) is used for defining a town area according to a flight line of the unmanned aerial vehicle (1);
The comparison module (6) comprises a time period acquisition unit (61), a map selection unit (62) and a configuration unit (63);
A time period acquisition unit (61) for forming a time period according to the start time and the end time input by the user, and transmitting the time period to a map selection unit (62);
the map selection unit (62) is used for comparing whether the acquisition time of the town area is in the time interval or not so as to brush out the town area with all the acquisition time in the time interval, and if a plurality of town areas are in the time interval, the map selection unit (62) selects the town area with two acquisition times closest to the starting time and the ending time respectively;
The configuration unit (63) is used for copying the boundary of the town area closest to the starting time selected by the map selection unit (62), and then overlaying the copied boundary on the town area closest to the ending time to form a boundary comparison map.
4. A town land boundary monitoring system as claimed in claim 3, wherein: the remote control module (3) has a manual mode and an automatic mode,
In a manual mode, the remote control module (3) is controlled by a user to send a flight instruction to the unmanned aerial vehicle (1);
in the automatic mode, the remote control module (3) sends flight instructions to the unmanned aerial vehicle (1) according to a predetermined flight path.
5. A town land boundary monitoring system as claimed in claim 3, wherein: the comparison module (6) also comprises an identification unit (64), a first area calculation unit (65) and a second area calculation unit (66),
The identification unit (64) is used for judging whether two boundaries on the boundary comparison map have intersection or not, if not, the identification unit (64) sends a starting instruction to the first area calculation unit (65), and if so, the identification unit (64) sends a starting instruction to the second area calculation unit (66);
The first area calculating unit (65) is used for calculating the areas in the two boundaries in the boundary comparison map and calculating the difference value of the two areas;
the second area calculation unit (66) is used for dividing a first area and a second area on the town area, and calculating the areas of the first area and the second area respectively.
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