CN114708499B - Landslide object source area calculation method and device - Google Patents
Landslide object source area calculation method and device Download PDFInfo
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Abstract
The invention provides a method and a device for calculating the area of a landslide object source, wherein the method comprises the following steps: determining potential landslide perimeter feature points in a target area; determining the landslide perimeter of the potential landslide object source according to the characteristic points of the perimeter of each potential landslide; determining the width of the potential landslide object source and the length of the potential landslide object source in the smooth direction according to the landslide perimeter of the potential landslide object source; and determining the area of the potential landslide object source in the target area according to the width and the width-to-length ratio of each potential landslide object source. The method and the device can accurately obtain the potential landslide object source area through simple calculation, and the potential landslide object source area is not influenced by the rock and soil materials and landslide causes in the target area when the method and the device are executed, and the method and the device are suitable for calculating the potential landslide object source areas with different rock and soil materials and different causes.
Description
Technical Field
The invention relates to the technical field of geological engineering, in particular to a landslide material source area calculating method and device.
Background
The object source shape of the landslide is in an irregular tongue shape, an elliptic shape and the like, and 2 methods for acquiring the area of the object source of the landslide exist in the prior art: (1) In a field investigation, the width and length of the landslide object source are measured, then the landslide object source is approximated as a rectangle, and the product of the two is estimated as the upper limit of the landslide object source area. (2) And (3) a planar area of the landslide object source is circled through a remote sensing image, and the object source area of the landslide is obtained through computer integration. For the first estimation method, in the field investigation, the width and length of the obtained landslide object source are overestimated, and the product of the width and length and the actual area of the landslide object source are greatly different. The second estimation method needs computer integration to obtain the object source area of the landslide, and the calculation process is complex. In addition, for a potential landslide, the perimeters of the landslides are not yet communicated, and the two methods cannot be used for estimating the landslide material source area value of the potential landslide.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that the landslide area of the potential landslide cannot be estimated in the prior art, so as to provide a landslide material source area calculating method and device.
The invention provides a method for calculating the landslide object source area, which comprises the following steps: determining potential landslide perimeter feature points in a target area; determining the landslide perimeter of the potential landslide object source according to the characteristic points of the perimeter of each potential landslide; determining the width of the potential landslide object source and the length of the potential landslide object source in the smooth direction according to the landslide perimeter of the potential landslide object source; and determining the area of the potential landslide object source in the target area according to the width and the width-to-length ratio of each potential landslide object source, wherein the width-to-length ratio of the potential landslide object source is the ratio of the width of the potential landslide object source to the length of the potential landslide object source in the smooth direction.
Optionally, in the method for calculating the landslide object source area provided by the present invention, the potential landslide perimeter feature points include a topographic bulge feature point and a topographic dislocation deformation feature point, and determining the landslide perimeter of the potential landslide object source according to each potential landslide perimeter feature point includes: and determining a closed area formed by communicating the topographic bulge characteristic points and the topographic dislocation deformation characteristic points in the target area as a landslide perimeter of the potential landslide object source.
Optionally, in the method for calculating the landslide object source area provided by the invention, the potential landslide object source area is calculated by the following formula:
wherein A is L For the area of the potential landslide object source, W is the width of the potential landslide object source,l is the length of the potential landslide material source in the smooth direction, pi is the circumference value, epsilon is the width-to-length ratio of the potential landslide material source, and +.>
Optionally, in the method for calculating the landslide object source area provided by the invention, the method further includes: acquiring the width of each landslide object source and the length of each landslide object source in the target area in the smooth direction; determining the landslide object source area of each landslide object source in the target area according to the width and width-to-length ratio of each landslide object source, wherein the width-to-length ratio of each landslide object source is the ratio of the width of the landslide object source to the length of the landslide object source in the smooth direction; and determining the total landslide object source area in the target area according to the potential landslide object source area in the target area and each landslide object source area.
The second aspect of the present invention provides a computing device for landslide object source area, comprising: the perimeter feature point determining module is used for determining potential landslide perimeter feature points in the target area; the landslide perimeter determining module is used for determining the landslide perimeter of the potential landslide object source according to each potential landslide perimeter characteristic point; the perimeter parameter determining module is used for determining the width of the potential landslide object source and the length of the potential landslide object source in the smooth direction according to the landslide perimeter of the potential landslide object source; and the potential landslide object source area calculation module is used for determining the potential landslide object source area in the target area according to the width and width-to-length ratio of each potential landslide object source, wherein the width-to-length ratio of the potential landslide object source is the ratio of the width of the potential landslide object source to the length of the potential landslide object source in the smooth direction.
Optionally, in the computing device for providing the landslide object source area, the potential landslide perimeter feature points comprise topographic bulge feature points and topographic dislocation deformation feature points, and the landslide perimeter determining module is specifically configured to determine a closed area formed by communicating the topographic bulge feature points and the topographic dislocation deformation feature points in the target area as the landslide perimeter of the potential landslide object source.
Optionally, in the calculating device for providing landslide object source area according to the present invention, the potential landslide object source area is calculated by the following formula:
wherein A is L For the area of the potential landslide object source, W is the width of the potential landslide object source, L is the length of the potential landslide object source in the smooth direction, pi is the circumference value, epsilon is the width-to-length ratio of the landslide object source>
Optionally, in the computing device for providing landslide object source area according to the present invention, the computing device further includes: the landslide object source parameter acquisition module is used for acquiring the width of each landslide object source and the length of each landslide object source in the target area in the smooth direction; the landslide object source area determining module is used for determining the landslide object source area of each landslide object source in the target area according to the width and width-to-length ratio of each landslide object source, wherein the width-to-length ratio of the landslide object source is the ratio of the width of the landslide object source to the length of the landslide object source in the smooth direction; and the total landslide object source area determining module is used for determining the total landslide object source area in the target area according to the potential landslide object source area in the target area and the landslide object source areas.
A third aspect of the present invention provides a computer apparatus comprising: at least one processor; and a memory communicatively coupled to the at least one processor; the memory stores instructions executable by the at least one processor to perform the method for calculating the landslide object source area as provided in the first aspect of the invention.
A fourth aspect of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions for causing a computer to perform the method for calculating the landslide object source area as provided in the first aspect of the present invention.
The technical scheme of the invention has the following advantages:
according to the method and the device for calculating the area of the landslide object source, the landslide perimeter of the potential landslide object source is determined through the potential landslide perimeter feature points in the target area, so that identification of the potential landslide object source is achieved, after the landslide perimeter of the potential landslide object source is identified, parameter information of the potential landslide object source, namely the width of the potential landslide object source and the length of the potential landslide object source in the smooth direction, is rapidly obtained, and calculation of the area of the potential landslide object source is achieved based on the width and the width-to-length ratio of the potential landslide object source. In addition, in the method and the device for calculating the area of the landslide object source, the fact that the width of the obtained potential landslide object source and the length of the potential landslide object source in the forward direction are possibly estimated excessively is considered, so that the area of the potential landslide object source in the target area is determined according to the width and the width-to-length ratio of the potential landslide object source, the obtained area of the potential landslide object source is closer to the actual area, and the calculation method provided by the invention is simpler.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flowchart of a specific example of a method for calculating a landslide object source area according to an embodiment of the invention;
FIG. 2 is a scatter diagram of the actual landslide object source area and the landslide object source area calculated by executing the calculation method of the landslide object source area provided by the embodiment of the invention;
FIG. 3 is a distribution of estimated errors of landslide material source areas calculated by executing the calculation method of landslide material source areas provided by the embodiment of the invention;
FIG. 4 shows the distribution of landslide in four landslide catalogs and the distribution of estimation errors of the landslide material source areas in different landslide catalogs according to the embodiment of the invention;
FIG. 5 is a schematic block diagram of one specific example of a landslide object source area computing device in accordance with an embodiment of the invention;
fig. 6 is a schematic block diagram of a specific example of a computer device in an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that technical features of different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The embodiment of the invention provides a method for calculating the landslide object source area, which is shown in fig. 1 and comprises the following steps:
step S11: potential landslide perimeter feature points within the target area are determined.
In an alternative embodiment, for a potential landslide, the perimeter of the landslide is the portion of the landslide that is to be slid, at which point the perimeter of the landslide is equivalent to the perimeter of the landslide source. Although complete slip failure does not occur, there is still a more pronounced landslide object source peripheral deformation feature, and therefore, the location in the target area where the landslide object source peripheral deformation feature is present can be determined as a potential landslide peripheral feature point.
In an alternative embodiment, a remote sensing image of the target area is acquired first, then feature analysis is performed on the remote sensing image, and potential landslide perimeter feature points in the target area are determined.
Step S12: and determining the landslide perimeter of the potential landslide object source according to each potential landslide perimeter characteristic point.
In an alternative embodiment, the potential landslide perimeter feature points are in a dispersed state, a plurality of dispersed potential landslide perimeter feature points are connected, and the formed closed area is the landslide perimeter of the potential landslide object source.
Step S13: and determining the width of the potential landslide object source and the length of the potential landslide object source in the smooth direction according to the landslide perimeter of the potential landslide object source.
The potential landslide object source has a certain gradient, and the length of the potential landslide object source in the embodiment of the invention is not the length in the potential horizontal direction, but the length along the inclination angle.
In an alternative embodiment, the width of the potential landslide object source and the length of the potential landslide object source in the smooth direction can be measured by a range finder in the field investigation process, and can also be obtained by analyzing remote sensing images.
Step S14: and determining the area of the potential landslide object source in the target area according to the width and the width-to-length ratio of each potential landslide object source, wherein the width-to-length ratio of the potential landslide object source is the ratio of the width of the potential landslide object source to the length of the potential landslide object source in the smooth direction.
According to the method for calculating the area of the landslide object source, the landslide perimeter of the potential landslide object source is determined through the potential landslide perimeter feature points in the target area, so that identification of the potential landslide object source is achieved, after the landslide perimeter of the potential landslide object source is identified, parameter information of the potential landslide object source, namely the width of the potential landslide object source and the length of the potential landslide object source in the smooth direction, is rapidly obtained, and calculation of the area of the potential landslide object source is achieved based on the width and the width-to-length ratio of the potential landslide object source. In addition, in the calculation method of the landslide object source area provided by the embodiment of the invention, the fact that the acquired width of the potential landslide object source and the length of the potential landslide object source in the forward direction can be estimated excessively is considered, so that the potential landslide object source area in the target area is determined according to the width and the width-to-length ratio of the potential landslide object source, the obtained potential landslide object source area is closer to the actual area, and the calculation method provided by the embodiment of the invention is simpler.
In an alternative embodiment, the potential landslide perimeter feature points include a topographic bulge feature point and a topographic dislocation deformation feature point, and the step S12 specifically includes:
and determining a closed area formed by communicating the topographic bulge characteristic points and the topographic dislocation deformation characteristic points in the target area as a landslide perimeter of the potential landslide object source.
In an alternative embodiment, the normal terrain and the swelling terrain in the target area can be identified through the point cloud data or the image data of the target area, and the contact point of the fault terrain and the downhill normal terrain is determined to be the swelling characteristic point.
In an alternative embodiment, the creep of the potential landslide stretches out cracks at the rear edge and the periphery of the landslide object source, some cracks extend long to form through cracks, some cracks extend short to form goose-train-type arranged cracks, the cracks in the target area are identified through point cloud data or image data of the target area, and distribution points of the cracks at the rear edge and the periphery of the potential landslide object source are regarded as topography dislocation deformation characteristic points.
In an alternative embodiment, in the area where the sliding is to occur, the rear edge and the left and right sides of the sliding object source have discontinuous deformation characteristics of the staggered terrain, the front edge of the sliding object source has a terrain bulge characteristic, the positions where the terrain characteristics appear are perimeter characteristic points of the potential sliding object source, the perimeter of the sliding object source can be approximately obtained by connecting the perimeter characteristic points, and the perimeter of the sliding object is also the area where the sliding object will slide, so that the width and the length of the potential sliding object source can be measured or extracted according to the perimeter of the sliding object.
In an alternative embodiment, if the area of the target area is larger, there are multiple potential landslide object sources in one target area, and at this time, different potential landslide perimeter feature points in the target area may belong to different potential landslide object sources, and in the embodiment of the invention, when determining the landslide perimeter of the potential landslide object sources:
firstly, determining a plurality of topographic bulge characteristic points, wherein an included angle between a straight line formed by the topographic bulge characteristic points and the landslide smooth direction is within a preset range (for example, the preset range can be 90 degrees plus or minus 20 degrees);
then, determining a plurality of first topographic dislocation deformation characteristic points adjacent to the connecting line of the topographic bulge characteristic points along the landslide smooth direction, wherein the included angle between a straight line formed by the first topographic dislocation deformation characteristic points and the landslide smooth direction is in a preset range (for example, the included angle can be 90+/-20 degrees in the preset range), and the altitude of the first topographic dislocation deformation characteristic points is higher than that of the topographic bulge characteristic points;
and finally, determining the straight line formed by the topographic bulge characteristic points and the second topographic dislocation deformation characteristic points at two sides of the straight line formed by the first topographic dislocation deformation characteristic points, connecting the straight line formed by the topographic bulge characteristic points, the straight line formed by the first topographic dislocation deformation characteristic points and the second topographic dislocation deformation characteristic points at two sides to form a communication area, and determining the communication area as the landslide perimeter of the potential landslide material source.
In an alternative embodiment, the potential landslide object source area is calculated by the following formula:
wherein A is L For the area of the potential landslide object source, W is the width of the potential landslide object source, L is the length of the potential landslide object source in the smooth direction, pi is the circumference value, epsilon is the width-to-length ratio of the potential landslide object source,
in an optional embodiment, the method for calculating the landslide object source area provided by the embodiment of the invention further includes:
first, the width of each landslide object source and the length of each landslide object source in the target area in the smooth direction are obtained.
The landslide object sources in the embodiment of the invention are the sliding parts in the landslide, the peripheries of the landslide object sources are communicated, at the moment, the width of each landslide object source and the length of each landslide object source in the smooth direction can be extracted according to the remote sensing images, and the width of each landslide object source and the length of each landslide object source in the smooth direction can be measured and obtained through a distance meter in the field investigation process.
And then, determining the landslide object source area of each landslide object source in the target area according to the width and width-to-length ratio of each landslide object source, wherein the width-to-length ratio of the landslide object source is the ratio of the width of the landslide object source to the length of the landslide object source in the smooth direction.
In an alternative embodiment, the landslide object source area is calculated by the following formula:
at this time, A L The area of the landslide object source is W is the width of the landslide object source, L is the length of the landslide object source in the smooth direction, pi is the circumference value, epsilon is the width-to-length ratio of the landslide object source,
and finally, determining the total landslide object source area in the target area according to the potential landslide object source area in the target area and each landslide object source area.
The sum of the potential landslide object source area of each potential landslide object source and the landslide object source area of each landslide object source in the target area is the total landslide object source area in the target area.
In order to verify that the method for calculating the landslide object source area provided by the embodiment of the invention can calculate the landslide object source area more accurately, and is not influenced by rock-soil body conditions and induction conditions when calculating the landslide object source area, the embodiment of the invention takes four landslide databases as an example to carry out verification and error analysis:
verification is performed by using a database of landslide in southeast of Tibetan, wherein the database comprises landslide 5556. The landslide object source surface elements are jointly interpreted through satellite data such as GF-2, google Earth, landsat-8 and the like. The total area of landslide material source reaches 270.35km 2 About 1.59% of the area of the investigation region, including 67 soil landslide and 5489 rock landslide, the maximum landslide material source area of the investigation region is 925.21 ×104m 2 The minimum landslide material source area is 24.55m 2 . The width, length and area of each landslide object source are extracted through space analysis software, and a formula is used
The landslide material source area is calculated, comparison and error analysis are carried out, and the comparison result and the error analysis result are shown in fig. 2 and 3.
The object source area of the maximum landslide calculated by the embodiment of the invention is 0.83km 2 The actual interpretation area of the landslide is different by-10.32 percent. The object source area of the minimum landslide calculated by the embodiment of the invention is 24.97m 2 The interpreted area from landslide is only 1.72%. The estimated and interpreted areas of the landslide source are put into fig. 2 and subjected to linear regression, the slope of the resulting regression line reaching 0.9652, r-square= 0.9933. The slope of the regression line shows that the results calculated by the examples of the present invention are very consistent with the interpretation results. For 5556 landslide, the total interpreted area of the landslide material source is 270.35km 2 From the formula
The calculated estimated total area is 274.66km 2 The difference between the two is only 1.59%.
As shown in fig. 3, the error concentration calculated by the method provided by the embodiment of the present invention is distributed in the range of 19.88% to-14.41%. The estimation error of 56% of landslide object source areas in landslide catalogs is between-5% and 5%; the error of the estimated result of 85% landslide is between-10% and 10%; while 95% of the estimated results have an error between-15% and 15%; the error of the remaining small part (5% landslide) is greater than 15%. In addition, in the landslide inventory, 61% of landslide object source estimation errors are positive, and the remaining 49% of landslide estimation errors are negative. The error range of this error is considered acceptable given the large number of landslide in the landslide inventory.
According to the embodiment of the invention, 3 landslide databases are added to continuously verify that the method provided by the embodiment of the invention is not influenced by the condition and the induction condition of a rock-soil body, and landslide catalogs for verification are respectively: in 2008 (Mw7.9) Wenchen earthquake, 205 landslide groups are interpreted by the Zhenxiu town in the middle of the earthquake; in 2014 (ms6.5) meadow earthquake, consisting of 190 landslide; and (3) selecting 104 landslide with clear object source boundaries in the landslide dense area of the loess plateau. Landslide development in these 3 databases was induced under different geotechnical conditions. Using the formula
The estimated source area of each landslide in the 3 databases is calculated, the error is calculated, and the maximum value, the minimum value and the average value of the error are put into the same graph as the landslide data in fig. 2, as shown in fig. 4.
As can be seen from fig. 4, the source estimation error distribution ranges of the 4 landslide are substantially the same, i.e., -0.15 to 0.2. Furthermore, the average errors of the four landslide designs were only 0.024, -0.003, 0.042 and-0.003, respectively, indicating the accuracy of the landslide material source area obtained by performing the method provided in the above examples. It is worth noting that the error distribution of the 4 landslide catalogs also reflects that the object source area of the landslide source area calculated by the method is not greatly related to the condition of the rock and soil mass and the induction condition of the landslide. This shows that the method provided by the above embodiment is applicable not only to landslide of different substances, but also to landslide of different causes.
An embodiment of the present invention provides a computing device for landslide object source area, as shown in fig. 5, including:
the perimeter feature point determining module 21 is configured to determine the perimeter feature points of the potential landslide in the target area, and the details of the description of step S11 in the above embodiment are not repeated herein.
The landslide perimeter determining module 22 is configured to determine a landslide perimeter of the potential landslide object source according to each potential landslide perimeter feature point, and details of the determination are described in the above embodiment, and are not repeated herein.
The perimeter parameter determining module 23 is configured to determine the width of the potential landslide object source and the length of the potential landslide object source in the smooth direction according to the landslide perimeter of the potential landslide object source, which are described in the above embodiment, and are not repeated here.
The potential landslide object source area calculating module 24 is configured to determine the potential landslide object source area in the target area according to the width and width-to-length ratio of each potential landslide object source, where the width-to-length ratio of the potential landslide object source is the ratio of the width of the potential landslide object source to the length of the potential landslide object source in the smooth direction, and details of the step S14 are referred to in the above embodiments and will not be described herein.
In an alternative embodiment, the potential landslide perimeter feature points include a topographic bulge feature point and a topographic dislocation deformation feature point, and the landslide perimeter determination module 22 is specifically configured to determine a closed area formed by communicating the topographic bulge feature point and the topographic dislocation deformation feature point in the target area as the landslide perimeter of the potential landslide object source.
In an alternative embodiment, in the calculating device for landslide object source area provided in the embodiment of the present invention, the potential landslide object source area is calculated by the following formula:
wherein A is L For the area of the potential landslide object source, W is the width of the potential landslide object source, L is the length of the potential landslide object source in the smooth direction, pi is the circumference value, epsilon is the width-to-length ratio of the landslide object source,
in an alternative embodiment, the calculating device for landslide object source area provided in the embodiment of the present invention further includes:
the landslide object source parameter obtaining module is configured to obtain a width of each landslide object source and a length of each landslide object source in the target area, and details of the landslide object source parameter obtaining module are described in the above method embodiments, and are not described herein.
The landslide object source area determining module is configured to determine a landslide object source area of each landslide object source in the target area according to a width and a width-to-length ratio of each landslide object source, where the width-to-length ratio of each landslide object source is a ratio of a width of the landslide object source to a length of the landslide object source in a smooth direction, and details are described in the above method embodiments and are not repeated herein.
The total landslide object source area determining module is configured to determine a total landslide object source area in the target area according to the potential landslide object source area in the target area and each landslide object source area, and details of the determination are described in the above method embodiments and are not repeated herein.
An embodiment of the present invention provides a computer device, as shown in fig. 6, which mainly includes one or more processors 31 and a memory 32, and in fig. 6, one processor 31 is taken as an example.
The computer device may further include: an input device 33 and an output device 34.
The processor 31, the memory 32, the input device 33 and the output device 34 may be connected by a bus or otherwise, for example in fig. 6.
The processor 31 may be a central processing unit (Central Processing Unit, CPU). The processor 31 may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), field programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or a combination thereof. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The memory 32 may include a storage program area that may store an operating system, at least one application program required for functions, and a storage data area; the storage data area may store data created from the use of the computing device of the landslide object source area, or the like. In addition, the memory 32 may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 32 may optionally include memory located remotely from processor 31, which may be connected to the computing device of the landslide object source area through a network. The input device 33 may receive a user entered calculation request (or other numeric or character information) and generate key signal inputs related to the computing device for landslide material source area. The output device 34 may include a display device such as a display screen for outputting the calculation result.
The embodiment of the invention provides a computer readable storage medium, which stores computer instructions, and the computer storage medium stores computer executable instructions, and the computer executable instructions can execute the method for calculating the landslide object source area in any of the method embodiments. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a Flash Memory (Flash Memory), a Hard Disk (HDD), or a Solid State Drive (SSD); the storage medium may also comprise a combination of memories of the kind described above.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.
Claims (8)
1. The method for calculating the landslide object source area is characterized by comprising the following steps of:
determining potential landslide perimeter feature points in the target area, and determining the positions of the peripheral deformation features of the landslide object source in the target area as the potential landslide perimeter feature points;
determining the landslide perimeter of the potential landslide object source according to each potential landslide perimeter characteristic point;
determining the width of the potential landslide object source and the length of the potential landslide object source in the smooth direction according to the landslide perimeter of the potential landslide object source;
determining the area of the potential landslide object source in the target area according to the width and width-to-length ratio of each potential landslide object source, wherein the width-to-length ratio of the potential landslide object source is the ratio of the width of the potential landslide object source to the length of the potential landslide object source in the smooth direction;
the potential landslide perimeter feature points comprise topographic bulge feature points and topographic dislocation deformation feature points,
determining a landslide perimeter of the potential landslide object source according to each potential landslide perimeter feature point comprises:
and determining a closed area formed by communicating the topographic bulge characteristic points and the topographic dislocation deformation characteristic points in the target area as a landslide perimeter of the potential landslide material source.
2. The method of claim 1, wherein the potential landslide object source area is calculated by the formula:
wherein A is L For the area of the potential landslide object source, W is the width of the potential landslide object source, L is the length of the potential landslide object source in the smooth direction, pi is the circumference value, epsilon is the width-to-length ratio of the potential landslide object source,
3. the method for calculating a landslide object source area according to claim 1 or 2, further comprising:
acquiring the width of each landslide object source and the length of each landslide object source in the target area in the smooth direction;
determining the landslide object source area of each landslide object source in the target area according to the width and width-to-length ratio of each landslide object source, wherein the width-to-length ratio of each landslide object source is the ratio of the width of the landslide object source to the length of the landslide object source in the smooth direction;
and determining the total landslide object source area in the target area according to the potential landslide object source area and each landslide object source area in the target area.
4. A computing device for landslide object source area, comprising:
the perimeter feature point determining module is used for determining potential landslide perimeter feature points in the target area and determining the positions of the peripheral deformation features of the landslide object sources in the target area as the potential landslide perimeter feature points;
the landslide perimeter determining module is used for determining the landslide perimeter of the potential landslide object source according to each potential landslide perimeter characteristic point;
the perimeter parameter determining module is used for determining the width of the potential landslide object source and the length of the potential landslide object source in the forward direction according to the landslide perimeter of the potential landslide object source;
the potential landslide object source area calculation module is used for determining the potential landslide object source area in the target area according to the width and the width-to-length ratio of each potential landslide object source, wherein the width-to-length ratio of the potential landslide object source is the ratio of the width of the potential landslide object source to the length of the potential landslide object source in the smooth direction;
the potential landslide perimeter feature points comprise topographic bulge feature points and topographic dislocation deformation feature points,
the landslide perimeter determining module is specifically used for determining a closed area formed by communicating the topographic bulge characteristic points and the topographic dislocation deformation characteristic points in the target area as the landslide perimeter of the potential landslide object source.
5. The landslide object source area calculating device of claim 4 wherein the potential landslide object source area is calculated by the formula:
wherein A is L For the area of the potential landslide object source, W is the width of the potential landslide object source, L is the length of the potential landslide object source in the smooth direction, pi is the circumference value, epsilon is the width-to-length ratio of the landslide object source,
6. the landslide object source area calculating device of claim 4 or 5 further comprising:
the landslide object source parameter acquisition module is used for acquiring the width of each landslide object source and the length of each landslide object source in the target area in the smooth direction;
the landslide object source area determining module is used for determining the landslide object source area of each landslide object source in the target area according to the width and width-to-length ratio of each landslide object source, wherein the width-to-length ratio of each landslide object source is the ratio of the width of the landslide object source to the length of the landslide object source in the smooth direction;
and the total landslide object source area determining module is used for determining the total landslide object source area in the target area according to the potential landslide object source area in the target area and each landslide object source area.
7. A computer device, comprising:
at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to perform the method of calculating landslide object source area of any one of claims 1-3.
8. A computer-readable storage medium storing computer instructions for causing the computer to perform the method of calculating the landslide object source area of any one of claims 1-3.
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