CN115208949A - Method, device, system and equipment for managing and distributing remote sensing image data - Google Patents
Method, device, system and equipment for managing and distributing remote sensing image data Download PDFInfo
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T3/00—Geometric image transformation in the plane of the image
- G06T3/40—Scaling the whole image or part thereof
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- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The invention discloses a method, a device, a system and equipment for managing and distributing remote sensing image data, wherein the method comprises the following steps: receiving a newly-added remote sensing image file, scanning and storing metadata information, issuing WMTS service based on the metadata information, and automatically splicing a plurality of images before issuing the WMTS service; the service gateway receives and forwards a WMTS service request from the client, the working node analyzes and obtains target WMTS service information, dynamic slicing and splicing are carried out on the target remote sensing image file, a target tile is generated, and the target tile is returned to the client through the service gateway. According to the invention, image splicing is automatically completed before service is constructed, and when a low-level request is made, a spliced image can directly replace an original image, so that the efficiency of dynamic slicing of multiple high-resolution images is greatly improved, the images are rapidly released, and meanwhile, the function of importing and releasing a single image can be realized; the target tiles are formed through splicing, so that the storage of the massive remote sensing image files is discrete, and the display of the massive remote sensing image files is uniform.
Description
Technical Field
The invention belongs to the technical field of remote sensing data management, and particularly relates to a method, a device, a system and equipment for managing and distributing remote sensing image data.
Background
In recent years, the number of earth observation remote sensing satellites driven by demands of various application fields is increasing, for example, the number of remote sensing satellites in high-grade series, resource series, jilin series, beijing, sky plot and the like in China reaches dozens, the variety of acquired images is various, the acquisition period of images in a specific observation area is shorter and shorter, the coverage of the images is shortened from annual coverage to seasonal coverage, monthly coverage and even daily coverage, the image data has the characteristics of large data volume, wide coverage range, high updating speed and the like, and multi-source, multi-mode, multi-time phase and multi-scale remote sensing image big data is formed. However, under the current situation of huge supply and demand, the problems of untimely data distribution and low utilization rate hinder the development of remote sensing image data application.
In order to solve the above problems, in the prior art, some research has been conducted by researchers, and the problem of local storage and management of mass image data is solved, and efficient image data support can also be provided for some professional GIS (Geographic Information System) systems, but the problem that a large amount of data cannot be timely and accurately distributed to users with different needs is still not solved, so that the user needs and the image Information are not effectively connected, for example: the user does not know what image data is, and the supplier does not know what image data the user needs, so that a large amount of image data cannot be effectively applied, and great resource waste is caused.
In order to establish effective connection between user requirements and image information, remote sensing image data overall planning platforms are also proposed at present, which are used for providing online image metadata information and thumbnail information query service and distribution service to the outside, improving image data transmission efficiency by pre-slicing images, and loading the images into an electronic map for public browsing. However, the above platform has problems of slow network transmission speed, poor browsing effect, inability of users to browse real image data and details thereof, inability to realize what you see is what you get, long slicing production period, high cost, geometric growth of generated small files, and the like.
Disclosure of Invention
The invention aims to provide a method, a device, a system and equipment for managing and distributing remote sensing image data, which are used for solving at least one technical problem in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a method for managing and distributing remote sensing image data, including:
receiving a newly-added remote sensing image file, scanning metadata information of the newly-added remote sensing image file, and storing the metadata information in a system database of a computing server so that the system database can issue WMTS service based on the metadata information; if the newly-added remote sensing image file contains a plurality of images, automatically splicing the plurality of images before WMTS service is released;
receiving a target file extraction request sent by a working node of a computing server, feeding back a target remote sensing image file matched with the target file extraction request to the working node so that the working node can dynamically slice and splice the target remote sensing image file to generate a target tile, and returning the target tile to a client through a service gateway;
the target file extraction request is based on that a serving gateway receives a WMTS service request from a client and forwards the WMTS service request to a working node in a computing server, so that the working node obtains target WMTS service information by analyzing the WMTS service request, metadata information matched with the target WMTS service information is inquired in a system database of the computing server, and the target file extraction request is generated according to the metadata information.
Based on the disclosure, for the WMTS service containing a plurality of images, image splicing is automatically completed before the service is constructed, and when a low-level request is made, the spliced image can be directly used for replacing an original image, so that the efficiency of dynamic slicing of the plurality of high-resolution images is greatly improved, and the images are rapidly released; an automatic scanning task is set for any image storage disc, so that the function of importing and releasing a single image can be realized; when the tile requested by the user relates to a plurality of image files, the required slices can be dynamically intercepted from each image file, and the target tiles are spliced, so that the dispersion of mass remote sensing image files on storage and the unification on display are realized.
In one possible design, the target WMTS service information includes a target WMTS service name, tile level and row number, tile picture format, projection coordinate system, and image timing version number.
In one possible design, the metadata information includes storage location, file name, geographical range, spatial coordinate system, production date, cloud cover, accuracy, satellite of which and sensor.
In a second aspect, the present invention provides a remote sensing image data management and distribution device, including:
the metadata storage module is used for receiving the newly increased remote sensing image file, scanning metadata information of the newly increased remote sensing image file and storing the metadata information in a system database of the computing server so that the system database can issue WMTS service based on the metadata information; if the newly-added remote sensing image file contains a plurality of images, the plurality of images can be automatically spliced before WMTS service is released;
the request response module is used for receiving a target file extraction request sent by a working node of the computing server, feeding back a target remote sensing image file matched with the target file extraction request to the working node so that the working node can dynamically slice and splice the target remote sensing image file to generate a target tile, and returning the target tile to the client through the service gateway;
the target file extraction request is based on that a serving gateway receives a WMTS service request from a client and forwards the WMTS service request to a working node in a computing server, so that the working node obtains target WMTS service information by analyzing the WMTS service request, metadata information matched with the target WMTS service information is inquired in a system database of the computing server, and the target file extraction request is generated according to the metadata information.
In a third aspect, the present invention provides a method for managing and distributing remote sensing image data, including:
receiving and storing metadata information of the newly added remote sensing image file, and issuing WMTS service based on the metadata information; when the newly-added remote sensing image file is imported into any storage disk of a storage server, the metadata information is obtained by scanning the newly-added remote sensing image file, and if the newly-added remote sensing image file contains a plurality of images, the plurality of images are automatically spliced before WMTS service is released;
receiving a WMTS service request from a client forwarded by a service gateway, analyzing the WMTS service request and acquiring target WMTS service information;
inquiring metadata information matched with the target WMTS service information, extracting a corresponding target remote sensing image file from an image storage disc of a storage server according to the metadata information, and dynamically slicing and splicing the target remote sensing image file to generate a target tile;
and returning the target tile to the client through the service gateway.
In one possible design, extracting a corresponding target remote sensing image file from an image storage disk of a storage server according to the metadata information includes:
and when the WMTS service request comprises a plurality of image low-level requests, extracting a spliced image from an image storage disc of a storage server to serve as a target remote sensing image file.
In one possible design, dynamically slicing and stitching the target remote sensing image file to generate a target tile includes:
and if the target remote sensing image file comprises a single image, dynamically slicing from the single image to obtain a target tile, otherwise, dynamically generating a plurality of partial slices from the multiple images, and splicing the partial slices into the target tile.
In a fourth aspect, the present invention provides a method for managing and distributing remote sensing image data, including:
receiving a WMTS service request from a client, inquiring an idle working node in a calculation server, forwarding the WMTS service request to the working node so that the working node can analyze the WMTS service request and obtain target WMTS service information, inquiring metadata information matched with the target WMTS service information in a system database of the calculation server, extracting a corresponding target remote sensing image file from an image storage disc of a storage server according to the metadata information, and dynamically slicing and splicing the target remote sensing image file to generate a target tile;
receiving the target tile and returning the target tile to the client;
the metadata information is obtained by scanning the newly added remote sensing image file when the newly added remote sensing image file is imported into any storage disk of the storage server; the system database is used for inquiring metadata information matched with the target WMTS service information based on a WMTS service issued in advance, and if the newly-added remote sensing image file contains a plurality of images, the plurality of images are automatically spliced before the WMTS service is issued.
In a fifth aspect, the invention provides a remote sensing image data management and distribution system, which comprises a client, at least one computing server, at least one storage server and at least one service gateway, wherein the client is in communication connection with the at least one service gateway, and the at least one service gateway and the at least one storage server are in communication connection with the at least one computing server respectively;
the at least one computing server is provided with a plurality of service nodes and a system database which is in communication connection with the service nodes, the at least one storage server is provided with a plurality of image storage disks, and network mapping is established between each image storage disk and the service nodes;
wherein the at least one storage server is configured to perform the method as set forth in any one of the possible designs of the first aspect; the at least one computing server is configured to perform the method of the second aspect; the at least one serving gateway is configured to perform the method according to the third aspect.
Based on the disclosure, the video storage disks and the service nodes can be set to be one or more, so that the system is suitable for various task scenes, wherein the system hardware deployment cost can be reduced by setting a single storage disk and/or a single service node, the requirement of a temporary emergency task is met, the dynamic slicing efficiency can be greatly improved by setting a multi-computer cluster, and the long-term high-concurrency task requirement is met.
In a sixth aspect, the present invention provides a computer device comprising a memory, a processor and a transceiver communicatively connected, wherein the memory is configured to store a computer program, the transceiver is configured to transmit and receive messages, and the processor is configured to read the computer program and perform the method as set forth in any one of the possible designs of the first aspect, or the method as set forth in the third aspect or the fourth aspect.
In a seventh aspect, the present invention provides a computer readable storage medium having stored thereon instructions which, when executed on a computer, perform a method as set forth in any one of the possible designs of the first aspect, or the third and fourth aspects.
In an eighth aspect, the present invention provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the method as set forth in any one of the possible designs of the first aspect, or the method of the third and fourth aspects.
Drawings
Fig. 1 is a schematic information interaction flow diagram of a remote sensing image data management and distribution method in this embodiment;
fig. 2 is a schematic structural diagram of the remote sensing image data management and distribution system in this embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are some, but not all embodiments of the present disclosure. All other embodiments, which can be obtained by a person skilled in the art without making any inventive step on the basis of the embodiments in the present description, shall fall within the scope of protection of the present invention.
Examples
As shown in fig. 1, in a first aspect, the present embodiment provides a method for managing and distributing remote sensing image data, which is applicable to an internet system including a computing server (including multiple service nodes and system databases), a storage server, a service gateway, a client, and the like, and provides a remote sensing image data management and distribution service through information interaction between devices in the internet system, and for a WMTS service including multiple images, image splicing is automatically completed before service is established, and when a low-level request is made, an original image can be directly replaced with the spliced image, so that efficiency of dynamic slicing of the multiple high-resolution images is greatly improved, and rapid image distribution is achieved; an automatic scanning task is set for any image storage disc, so that the function of importing and releasing a single image can be realized; when the tile requested by the user relates to a plurality of image files, the required slices can be dynamically intercepted from each image file and spliced to form the target tile, so that the dispersion of mass remote sensing image files on storage and the unification on display are realized.
The information interaction process of the remote sensing image data management and distribution method comprises but is not limited to the steps S1-S7:
s1, receiving a newly-added remote sensing image file by any image storage disk of a storage server, scanning metadata information of the newly-added remote sensing image file, and storing the metadata information in a system database of a computing server;
it should be noted that the number of the image storage disks may be one or more, one or more image storage disks may be defined on the same storage server, or may be defined on different storage servers, and if there are multiple storage servers, the storage servers do not need to be interconnected through a network; the system database is one and is deployed on a single computing server.
It should be noted that, when scanning metadata information of a newly added remote sensing image file, a scanning task may be manually added to perform scanning to obtain the metadata information, or a newly added data monitoring task may be set to establish a multi-source image adaptive scanning tool, and information scanning is automatically performed when new data is found, which is not limited herein; the self-adaptive scanning tool is a set of image metadata information scanning and warehousing tool software, periodically or in real time scans newly-added image files according to configured metadata structures, and automatically constructs an image pyramid or repairs damaged pyramid files.
Preferably, the metadata information includes, but is not limited to, a storage location, a file name, a geographic range, a spatial coordinate system, a production date, a cloud amount, accuracy, a satellite to which the metadata belongs, and a sensor, so that centralized management of mass remote sensing images in distributed storage is realized, only image metadata is stored in the database, and the remote sensing images are still stored in the distributed cluster database in a file form, so that the storage capacity of the database is reduced, and the response efficiency is improved.
Based on the above disclosure, the embodiment can reduce the production links of image coordinate system conversion, inlaying, splicing, slicing and the like, realize the automatic storage of remote sensing images without slicing, greatly reduce the labor cost and time cost of image release, and realize the quick online of the latest images.
S2, issuing WMTS (Web Map Tile Service) Service by the system database based on the metadata information; if the newly-added remote sensing image file contains a plurality of images, automatically splicing the plurality of images before WMTS service is released;
it should be noted that the WMTS service conforms to the Open Geospatial Consortium (OGC) standard, the image metadata information is stored in the system database, and includes the storage location, name, geographic range, spatial coordinate system, production date, cloud amount, accuracy, satellite and sensor of the image file, the NETCORE programming is adopted to realize the query interface of the image metadata information, and the query interface is issued as the image query service at the system server end through IIS and other tools.
Preferably, when the historical video WMTS service needs to be released, the method further includes: the video time sequence version is set, that is, the time version of the different video files is specified, for example, 2020, 2021, 2022, etc.
Specifically, with a specified number of frames (manually set according to the average size of the images) as a unit, according to a set image superposition mode (such as sorting according to name, production date, resolution and the like), the GDAL function interface is used for performing fragment splicing on adjacent images, then the fragment images are merged into a final spliced image, when a client requests a low-level tile, one tile may need dozens of hundreds of images for splicing generation, and the efficiency is extremely low; by splicing the original images in advance, when a client requests low-level tiles, the target tiles are directly generated from the spliced images, and the response efficiency is greatly improved.
Based on the above disclosure, for the WMTS service including multiple images, the image stitching is automatically completed before the service is constructed, and when a low-level request is made, the stitched image can be directly used to replace the original image, for example, the integrated publishing of the 500-frame 0.1-meter precision aerial image is supported, so that the efficiency of dynamic slicing of multiple high-resolution images is greatly improved, and the rapid publishing of the images is realized.
S3, receiving a WMTS service request from a client by a service gateway, and forwarding the WMTS service request to a working node in a computing server;
it should be noted that, in this embodiment, one or more service gateways are provided, for example, a main service gateway and a standby service gateway are provided; the working nodes comprise a plurality of working nodes, one of the working nodes is designated as a service registration main node, other sub-nodes are in network connection with the main node, and the IP of the sub-nodes is registered on the main node.
Then, when the service gateway receives a WMTS service request from the client, the service gateway queries a service node registered in the master node, and the service node forwards the WMTS service request to an idle node according to a preset scheduling mode, wherein the WMTS service request is subjected to load balancing by using a LeastConnection algorithm of Ocelot according to the preset scheduling mode; the Ocelot is an API gateway technology implemented by NET Core and open source, and the embedded load balancer function includes two load balancing algorithms, namely routrobin and leaseconnection, and the leaseconnection algorithm is preferably used in this embodiment.
S4, acquiring target WMTS service information by the working node through analyzing the WMTS service request, and inquiring metadata information matched with the target WMTS service information in a system database of a computing server;
specifically, the working node analyzes the WMTS service request, obtains information such as a target WMTS service name, a tile level, a row number, a tile picture format, a projection coordinate system, a time sequence version number and the like, calculates a tile geographic range according to the tile level, the row number and the projection coordinate system, combines the information such as the target WMTS service name, the time sequence version number and the like, and analyzes which remote sensing image files the tile relates to through a space query and an attribute query mode from an image metadata table of a database; the tile hierarchy supported by the present embodiment is from level 1 to level 21, and the lower the level, the wider the geographic range contained by a single tile.
Based on the above disclosure, the embodiment can implement distributed storage and centralized management of mass, multi-source, multi-temporal and multi-scale remote sensing images, and a user can timely query required image data according to information such as range, time, resolution, quality and the like.
S5, extracting a corresponding target remote sensing image file from an image storage disc of a storage server by the working node according to the metadata information, and dynamically slicing and splicing the target remote sensing image file to generate a target tile;
in step S5, extracting a corresponding target remote sensing image file from an image storage disk of a storage server according to the metadata information, including:
and when the WMTS service request comprises a plurality of image low-level requests, extracting a spliced image from an image storage disc of a storage server to serve as a target remote sensing image file.
Based on the above disclosure, the embodiment can implement remote sensing image versioning management based on time sequence, can provide historical image query and browsing services, and meets the requirement of a user on performing multi-period image comparison on a target area.
In step S5, dynamically slicing and stitching the target remote sensing image file to generate a target tile, including:
if the target remote sensing image file comprises a single image, obtaining a target tile from a dynamic slice in the single image, otherwise, dynamically generating a plurality of partial slices from the multiple images, and splicing the partial slices into the target tile, namely dynamically intercepting the required slice from each image and splicing the slices.
S6, the working node sends the target tile to a service gateway;
and S7, returning the target tile to the client by the service gateway.
Based on the above disclosure, in this embodiment, tile data of an image in a target area can be dynamically generated according to a user request, dynamic projection and splicing are performed on dynamic slices of multiple images/scenes (more than one thousand images/scenes) to form a picture, so that a user can zoom and contrast randomly on line (multiple images in the same area at different time phases are compared), seamlessly browse real image data of multiple images/scenes in the target area, help the user quickly and accurately select a target image, and then apply for downloading and using the target image, thereby finally realizing an integrated service of online management and real-time distribution of remote sensing image big data.
In a second aspect, the present invention provides a remote sensing image data management and distribution device, including:
the metadata storage module is used for receiving the newly increased remote sensing image file, scanning metadata information of the newly increased remote sensing image file and storing the metadata information in a system database of the computing server so that the system database can issue WMTS service based on the metadata information; if the newly-added remote sensing image file contains a plurality of images, the plurality of images can be automatically spliced before WMTS service is released;
the request response module is used for receiving a target file extraction request sent by a working node of the computing server, feeding back a target remote sensing image file matched with the target file extraction request to the working node so that the working node can dynamically slice and splice the target remote sensing image file to generate a target tile, and returning the target tile to the client through the service gateway;
the target file extraction request is based on that a serving gateway receives a WMTS service request from a client and forwards the WMTS service request to a working node in a computing server, so that the working node obtains target WMTS service information by analyzing the WMTS service request, metadata information matched with the target WMTS service information is inquired in a system database of the computing server, and the target file extraction request is generated according to the metadata information.
For the working process, working details and technical effects of the foregoing apparatus provided in the second aspect of this embodiment, reference may be made to the method described in any one of the first aspect or the first aspect, which is not described herein again.
As shown in fig. 2, in a third aspect, the present invention provides a remote sensing image data management and distribution system, including a client, at least one computing server, at least one storage server, and at least one service gateway, where the client is in communication connection with the at least one service gateway, and the at least one service gateway and the at least one storage server are in communication connection with the at least one computing server respectively;
the at least one computing server is provided with a plurality of service nodes and a system database which is in communication connection with the service nodes, the at least one storage server is provided with a plurality of image storage disks, and network mapping is established between each image storage disk and the service nodes;
wherein the at least one storage server is configured to perform the method as set forth in any one of the possible designs of the first aspect; the at least one computing server is configured to perform the method of the second aspect; the at least one serving gateway is configured to perform the method according to the third aspect.
Based on the disclosure, the video storage disks and the service nodes can be set to be one or more, so that the system is suitable for various task scenes, wherein the system hardware deployment cost can be reduced by setting a single storage disk and/or a single service node, the requirement of a temporary emergency task is met, the dynamic slicing efficiency can be greatly improved by setting a multi-computer cluster, and the long-term high-concurrency task requirement is met.
For the working process, the working details, and the technical effects of the pre-system provided in the third aspect of this embodiment, reference may be made to the method described in any one of the first aspect or the first aspect, which is not described herein again.
In a fourth aspect, the present invention provides a computer device comprising a memory, a processor and a transceiver communicatively coupled, wherein the memory is configured to store a computer program, the transceiver is configured to send and receive messages, and the processor is configured to read the computer program and perform the method as set forth in any one of the possible designs of the first aspect, or the method of the third aspect or the fourth aspect.
For example, the Memory may include, but is not limited to, a Random-Access Memory (RAM), a Read-Only Memory (ROM), a Flash Memory (Flash Memory), a First-in First-out (FIFO), a First-in Last-out (FILO), and/or a First-in Last-out (FILO); the processor may not be limited to the use of a microprocessor model number STM32F105 family; the transceiver may be, but is not limited to, a WiFi (wireless fidelity) wireless transceiver, a bluetooth wireless transceiver, a GPRS (General Packet Radio Service) wireless transceiver, and/or a ZigBee (ZigBee protocol, low power local area network protocol based on ieee802.15.4 standard) wireless transceiver, etc. In addition, the computer device may also include, but is not limited to, a power module, a display screen, and other necessary components.
For the working process, the working details, and the technical effects of the foregoing computer device provided in the fourth aspect of this embodiment, reference may be made to the method described in the first aspect or any one of the possible designs in the first aspect, which is not described herein again.
In a fifth aspect, the invention provides a computer readable storage medium having stored thereon instructions which, when executed on a computer, perform a method as set forth in any one of the possible designs of the first aspect, or the third and fourth aspects.
The computer-readable storage medium refers to a carrier for storing data, and may include, but is not limited to, floppy disks, optical disks, hard disks, flash memories, flash disks and/or Memory sticks (Memory sticks), etc., and the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
For the working process, working details, and technical effects of the foregoing computer-readable storage medium provided in the fifth aspect of this embodiment, reference may be made to the method described in the first aspect or any one of the possible designs of the first aspect, which is not described herein again.
In a sixth aspect, the present invention provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform a method as set forth in any one of the possible designs of the first aspect, or the third and fourth aspects.
For the working process, the working details and the technical effects of the foregoing computer program product provided in the sixth aspect of this embodiment, reference may be made to the method in any one of the above first aspect or the possible designs of the first aspect, which is not described herein again.
Finally, it should be noted that: the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for managing and distributing remote sensing image data is characterized by comprising the following steps:
receiving a newly-added remote sensing image file, scanning metadata information of the newly-added remote sensing image file, and storing the metadata information in a system database of a computing server so that the system database can issue WMTS service based on the metadata information; if the newly-added remote sensing image file comprises a plurality of images, automatically splicing the plurality of images before issuing WMTS service;
receiving a target file extraction request sent by a working node of a computing server, feeding back a target remote sensing image file matched with the target file extraction request to the working node so that the working node can dynamically slice and splice the target remote sensing image file to generate a target tile, and returning the target tile to a client through a service gateway;
the target file extraction request is based on that a serving gateway receives a WMTS service request from a client and forwards the WMTS service request to a working node in a computing server, so that the working node obtains target WMTS service information by analyzing the WMTS service request, metadata information matched with the target WMTS service information is inquired in a system database of the computing server, and the target file extraction request is generated according to the metadata information.
2. The method for managing and distributing remote sensing image data according to claim 1, wherein the target WMTS service information includes a target WMTS service name, a tile level and row number, a tile picture format, a projection coordinate system, and an image timing version number.
3. The method for managing and distributing remote sensing image data according to claim 1, wherein the metadata information includes storage location, file name, geographical range, spatial coordinate system, production date, cloud cover, accuracy, satellite and sensor.
4. A remote sensing image data management and distribution device is characterized by comprising:
the metadata storage module is used for receiving the newly increased remote sensing image file, scanning metadata information of the newly increased remote sensing image file and storing the metadata information in a system database of the computing server so that the system database can issue WMTS service based on the metadata information; if the newly-added remote sensing image file contains a plurality of images, the plurality of images can be automatically spliced before WMTS service is released;
the request response module is used for receiving a target file extraction request sent by a working node of the computing server, feeding back a target remote sensing image file matched with the target file extraction request to the working node so that the working node can dynamically slice and splice the target remote sensing image file to generate a target tile, and returning the target tile to the client through the service gateway;
the target file extraction request is based on that a serving gateway receives a WMTS service request from a client and forwards the WMTS service request to a working node in a computing server, so that the working node obtains target WMTS service information by analyzing the WMTS service request, metadata information matched with the target WMTS service information is inquired in a system database of the computing server, and the target file extraction request is generated according to the metadata information.
5. A remote sensing image data management and distribution method is characterized by comprising the following steps:
receiving and storing metadata information of the newly added remote sensing image file, and issuing WMTS service based on the metadata information; when the newly-added remote sensing image file is imported into any storage disk of a storage server, the metadata information is obtained by scanning the newly-added remote sensing image file, and if the newly-added remote sensing image file contains a plurality of images, the plurality of images are automatically spliced before WMTS service is released;
receiving a WMTS service request from a client forwarded by a service gateway, analyzing the WMTS service request and acquiring target WMTS service information;
inquiring metadata information matched with the target WMTS service information, extracting a corresponding target remote sensing image file from an image storage disc of a storage server according to the metadata information, and dynamically slicing and splicing the target remote sensing image file to generate a target tile;
and returning the target tile to the client through the service gateway.
6. The method for managing and distributing remote sensing image data according to claim 5, wherein extracting a corresponding target remote sensing image file from an image storage disk of a storage server according to the metadata information comprises:
and when the WMTS service request comprises a plurality of image low-level requests, extracting a spliced image from an image storage disc of a storage server to serve as a target remote sensing image file.
7. The method for managing and distributing remote sensing image data according to claim 5, wherein dynamically slicing and stitching the target remote sensing image file to generate a target tile comprises:
and if the target remote sensing image file comprises a single image, dynamically slicing from the single image to obtain a target tile, otherwise, dynamically generating a plurality of partial slices from the plurality of images, and splicing the partial slices into the target tile.
8. A method for managing and distributing remote sensing image data is characterized by comprising the following steps:
receiving a WMTS service request from a client, inquiring an idle working node in a calculation server, forwarding the WMTS service request to the working node so that the working node can analyze the WMTS service request and obtain target WMTS service information, inquiring metadata information matched with the target WMTS service information in a system database of the calculation server, extracting a corresponding target remote sensing image file from an image storage disc of a storage server according to the metadata information, and dynamically slicing and splicing the target remote sensing image file to generate a target tile;
receiving the target tile and returning the target tile to the client;
the metadata information is obtained by scanning the newly added remote sensing image file when the newly added remote sensing image file is imported into any storage disk of the storage server; the system database is used for inquiring metadata information matched with the target WMTS service information based on the WMTS service issued in advance, and if the newly-added remote sensing image file contains a plurality of images, the plurality of images are automatically spliced before the WMTS service is issued.
9. A remote sensing image data management and distribution system is characterized by comprising a client, at least one computing server, at least one storage server and at least one service gateway, wherein the client is in communication connection with the at least one service gateway;
the at least one computing server is provided with a plurality of service nodes and a system database which is in communication connection with the service nodes, the at least one storage server is provided with a plurality of image storage disks, and network mapping is established between each image storage disk and the service nodes;
wherein the at least one storage server is configured to perform the method of any one of claims 1-3; the at least one computing server for performing the method of claim 5; the at least one service gateway is configured to perform the method of claim 8.
10. A computer device comprising a memory, a processor and a transceiver communicatively coupled, wherein the memory is configured to store a computer program, the transceiver is configured to transmit and receive messages, and the processor is configured to read the computer program and perform the method of any of claims 1-3 or the method of any of claims 5-8.
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