CN113064572B - Three-dimensional space-time simulation method and device for remote sensing image data - Google Patents
Three-dimensional space-time simulation method and device for remote sensing image data Download PDFInfo
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Abstract
The application provides a three-dimensional space-time simulation method and a device for remote sensing image data, comprising the following steps: acquiring remote sensing image data; constructing remote sensing image data according to a preset Geohash-T multi-level space-time standard regular grid to obtain a grid index comprising a time stamp; the grid index is sent to a client, and the client analyzes the grid index to obtain a preset geographic range and a current window display level; processing a preset geographic range and a current window display level to obtain a plurality of target image blocks; the method comprises the steps that a plurality of target image blocks are sent to a client, the client displays the target image blocks in a superposition mode on three-dimensional topography, the target image blocks are organized according to time sequence according to time stamps of grid indexes, the processing process of framing, cutting and splicing remote sensing image data is avoided, and the workload is saved; the time continuous change condition of the three-dimensional earth surface space is reflected through image space-time grid scheduling and three-dimensional simulation, and the requirements of fine management such as natural resources, ecological environment and the like are met.
Description
Technical Field
The application relates to the field of natural resource information statistics, in particular to a three-dimensional space-time simulation method and device for remote sensing image data.
Background
The remote sensing image data is taken as important earth surface coverage data, can intuitively reflect the current situation of the distribution of the ground features of the three-dimensional earth surface, and has important significance for reflecting the current situation and the change situation of the three-dimensional soil space.
The traditional three-dimensional geographic information system adopts a static remote sensing image service method, namely, remote sensing image data are subjected to operations such as framing, cutting, splicing and the like to form versioned image data with consistent specifications, the versioned image data are issued as a static WMTS grid image service, and then superposition display is carried out in the three-dimensional geographic information system to form a remote sensing image three-dimensional scene organized according to the version.
The remote sensing image data is subjected to version splicing and processing at a unified time point, so that a large amount of workload is generated, time and labor are consumed, time information is lost in the remote sensing image data subjected to version splicing, real shooting and space-time change conditions of the ground surface are difficult to accurately simulate, and the requirements of fine management such as natural resources and ecological environment cannot be met.
Disclosure of Invention
Therefore, the application aims to provide the three-dimensional space-time simulation method and the three-dimensional space-time simulation device for the remote sensing image data, so that the processing process of framing, cutting and splicing the remote sensing image data is avoided, and the workload is saved; the time continuous change condition of the three-dimensional earth surface space can be reflected through image space-time grid scheduling and three-dimensional simulation, and the requirements of fine management such as natural resources, ecological environment and the like are met.
In a first aspect, an embodiment of the present application provides a three-dimensional space-time simulation method for remote sensing image data, which is applied to a server, and the method includes:
acquiring remote sensing image data;
constructing the remote sensing image data according to a preset Geohash-T multi-level space-time standard regular grid to obtain a grid index comprising a time stamp;
the grid index is sent to a client so that the client analyzes the grid index to obtain a preset geographic range and a current window display level;
receiving the preset geographic range and the current window display level sent by the client, and processing the preset geographic range and the current window display level to obtain a plurality of target image blocks;
and sending the target image blocks to the client so that the client displays the target image blocks in a superimposed mode on three-dimensional terrain, and organizing the target image blocks in time sequence according to the time stamps of the grid indexes.
Further, the remote sensing image data includes a pixel row-column range, and the constructing the remote sensing image data according to a preset Geohash-T multi-level space-time standard rule grid to obtain a grid index including a time stamp includes:
establishing a mapping relation among the remote sensing image data, the pixel row-column range and the preset Geohash-T multi-level space-time standard grid;
and constructing the grid index comprising the time stamp according to the mapping relation.
Further, the processing the preset geographic range and the current window display level to obtain a plurality of target image blocks includes:
obtaining all image names and pixel range sets in the preset geographic range according to the preset geographic range and the current window display level, wherein the pixel range sets comprise a plurality of pixel ranges;
and sequentially performing parallel traversal on each image name, each display level and each pixel range to obtain the plurality of target image blocks.
In a second aspect, an embodiment of the present application provides a three-dimensional space-time simulation method for remote sensing image data, applied to a client, where the method includes:
receiving a grid index comprising a time stamp sent by a server, and analyzing the grid index to obtain a preset geographic range and a current window display level;
the preset geographic range and the current window display level are sent to a server, so that the server processes the preset geographic range and the current window display level to obtain a plurality of target image blocks;
and receiving the plurality of target image blocks sent by the server, displaying the plurality of target image blocks in a superposition manner on three-dimensional topography, and organizing the target image blocks in time sequence according to the time stamps of the grid indexes.
Further, the displaying the plurality of target image blocks superimposed on the three-dimensional terrain includes:
and sequentially superposing and displaying each target image block on the three-dimensional terrain according to the sequence of the time stamp of each target image block.
Further, the method further comprises:
and when a plurality of target image blocks are overlapped in the same region on the three-dimensional terrain, sequentially superposing and displaying each target image block from the lower layer to the upper layer according to the sequence of the time stamp of each target image block.
Further, the method further comprises:
constructing an image time array according to the sequence of the time stamps corresponding to each target image block;
and constructing a time axis according to the superposition sequence of each target image block on the three-dimensional terrain by the image time array.
Further, the method further comprises:
acquiring operation instruction information of a user on the time axis, wherein the operation instruction information comprises clicking operation at the current time point;
and according to the operation of clicking the current time point, adjusting the target image block corresponding to the current time point to the uppermost layer for display.
In a third aspect, an embodiment of the present application provides a three-dimensional space-time simulation apparatus for remote sensing image data, applied to a server, where the apparatus includes:
the remote sensing image data acquisition unit is used for acquiring remote sensing image data;
the construction unit is used for constructing the remote sensing image data according to a preset Geohash-T multi-level space-time standard rule grid to obtain a grid index comprising a time stamp;
the grid index sending unit is used for sending the grid index to a client so that the client can analyze the grid index to obtain a preset geographic range and a current window display level;
the processing unit is used for receiving the preset geographic range and the current window display level sent by the client and processing the preset geographic range and the current window display level to obtain a plurality of target image blocks;
and the target image block sending unit is used for sending the target image blocks to the client so that the client displays the target image blocks in a superimposed mode on three-dimensional topography, and organizes the target image blocks in time sequence according to the time stamps of the grid indexes.
In a fourth aspect, an embodiment of the present application provides a three-dimensional spatiotemporal simulation apparatus for remote sensing image data, applied to a client, where the apparatus includes:
the grid index receiving unit is used for receiving the grid index comprising the time stamp and sent by the server, and analyzing the grid index to obtain a preset geographic range and a current window display level;
the hierarchy sending unit is used for sending the preset geographic range and the current window display hierarchy to a server so that the server processes the preset geographic range and the current window display hierarchy to obtain a plurality of target image blocks;
and the display unit is used for receiving the plurality of target image blocks sent by the server, displaying the plurality of target image blocks in a superposition manner on three-dimensional topography, and organizing the target image blocks in time sequence according to the time stamps of the grid indexes.
The embodiment of the application provides a three-dimensional space-time simulation method and device for remote sensing image data, comprising the following steps: acquiring remote sensing image data; constructing remote sensing image data according to a preset Geohash-T multi-level space-time standard regular grid to obtain a grid index comprising a time stamp; the grid index is sent to the client so that the client analyzes the grid index to obtain a preset geographic range and a current window display level; receiving a preset geographic range and a current window display level sent by a client, and processing the preset geographic range and the current window display level to obtain a plurality of target image blocks; transmitting the target image blocks to a client so that the client displays the target image blocks in a superposition manner on the three-dimensional terrain, and organizing the target image blocks in time sequence according to the time stamps of the grid indexes; the processing process of framing, cutting and splicing the remote sensing image data is avoided, and the workload is saved; the time continuous change condition of the three-dimensional earth surface space can be reflected through image space-time grid scheduling and three-dimensional simulation, and the requirements of fine management such as natural resources, ecological environment and the like are met.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the above objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present application 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 application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a three-dimensional space-time simulation method for remote sensing image data according to an embodiment of the present application;
FIG. 2 is a flow chart of a three-dimensional space-time simulation method for another remote sensing image data according to a second embodiment of the present application;
FIG. 3 is a schematic diagram of a three-dimensional space-time simulation device for remote sensing image data according to a third embodiment of the present application;
fig. 4 is a schematic diagram of a three-dimensional space-time simulation apparatus for remote sensing image data according to a fourth embodiment of the present application.
Icon:
1-a remote sensing image data acquisition unit; 2-a building unit; a 3-grid index transmitting unit; 4-a processing unit; 5-a target image block transmitting unit; a 6-grid index receiving unit; 7-hierarchy transmitting units; 8-display unit.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In order to facilitate understanding of the present embodiment, the following describes embodiments of the present application in detail.
Embodiment one:
fig. 1 is a flowchart of a three-dimensional space-time simulation method for remote sensing image data according to an embodiment of the present application.
Referring to fig. 1, applied to a server, the method includes the steps of:
step S101, remote sensing image data are obtained;
here, the remote sensing image data are classified and then uniformly stored, and the corresponding remote sensing image data can be accurately requested according to the access path.
And establishing a file pyramid for the remote sensing image data, storing the file pyramid and the remote sensing image data in the same catalog, and naming the file pyramid by adopting a unified rule.
Step S102, constructing remote sensing image data according to a preset Geohash-T multi-level space-time standard rule grid to obtain a grid index comprising a time stamp;
after establishing the grid index, the server adopts the geographic information service standard of the OGC WMTS standard and the Web Services interface to carry out service release on the grid index of the remote sensing image data. WMTS (OpenGIS Web Map Title Service) provides, among other things, a standardized solution for publishing digital map services using a predefined tile approach.
The Geohash-T trellis algorithm is a modified time-geography trellis algorithm, adding a time value to each trellis code. The encoding rule of the Geohash-T grid algorithm is as follows: geohash codes+8 bit temporal codes, e.g., 1110011101001000111120160103, where 11100111010010001111 is Geohash code and 20160103 is temporal code.
Step S103, the grid index is sent to the client so that the client analyzes the grid index to obtain a preset geographic range and a current window display level;
here, the client refers to a three-dimensional map engine at the front end of a computer or a mobile phone.
Step S104, receiving a preset geographic range and a current window display level sent by a client, and processing the preset geographic range and the current window display level to obtain a plurality of target image blocks;
step S105, the plurality of target image blocks are sent to the client, so that the client superimposes and displays the plurality of target image blocks on the three-dimensional terrain, and organizes the target image blocks in time sequence according to the time stamp of the grid index.
Further, the remote sensing image data includes a pixel row and column range, and step S102 includes the following steps:
step S201, establishing a mapping relation among remote sensing image data, pixel row-column ranges and a preset Geohash-T multi-level space-time standard grid;
step S202, constructing a grid index comprising a time stamp according to the mapping relation.
Specifically, a mapping relation of remote sensing image data, pixel row and column ranges and a preset Geohash-T multi-level space-time standard grid is established, a time stamp of the remote sensing image data is recorded, and the remote sensing image data and the corresponding pixel row and column ranges in all time are requested according to a set geographic range and a current window display level through a grid index.
When the client sends the hierarchy corresponding to the resolution of the remote sensing image data to the server, the server returns the remote sensing image data and the pixel row range to the client; when the client sends the hierarchy lower than the resolution ratio of the remote sensing image data to the server, the server returns the pixel row and column range of the corresponding hierarchy pyramid to the client.
Further, step S104 includes the steps of:
step S301, obtaining all image names and pixel range sets in a preset geographical range according to the preset geographical range and the current window display level, wherein the pixel range sets comprise a plurality of pixel ranges;
step S302, performing parallel traversal on each image name, display level and each pixel range in sequence to obtain a plurality of target image blocks.
Specifically, the server sends the grid index to the client, and the client analyzes the grid index to obtain a preset geographic range and a current window display level and sends the preset geographic range and the current window display level to the server; the server obtains all image names and pixel range sets in the preset geographic range according to the preset geographic range and the current window display level; performing parallel traversal on all image names and pixel range sets in a preset geographic range, namely sequentially performing parallel traversal on each image name, display level and each pixel range to finally obtain a plurality of target image blocks; and then transmitting the target image blocks to the client.
When the display position and the display hierarchy of the client are changed, the client can browse target image blocks at different positions and different hierarchies. When the position or the hierarchy of the client is changed, the current updated geographic range and the current display hierarchy are obtained in real time and sent to the server, the server obtains all image names and pixel range sets in the current updated geographic range according to the current updated geographic range and the current display hierarchy, and sequentially traverses each image name, display hierarchy and each pixel range in parallel to obtain a plurality of updated target image blocks, so that refreshing of the target image blocks in the current updated geographic range or the current display hierarchy is realized.
The embodiment of the application provides a three-dimensional space-time simulation method of remote sensing image data, which comprises the following steps: acquiring remote sensing image data; constructing remote sensing image data according to a preset Geohash-T multi-level space-time standard regular grid to obtain a grid index comprising a time stamp; the grid index is sent to the client so that the client analyzes the grid index to obtain a preset geographic range and a current window display level; receiving a preset geographic range and a current window display level sent by a client, and processing the preset geographic range and the current window display level to obtain a plurality of target image blocks; transmitting the target image blocks to a client so that the client displays the target image blocks in a superposition manner on the three-dimensional terrain, and organizing the target image blocks in time sequence according to the time stamps of the grid indexes; the processing process of framing, cutting and splicing the remote sensing image data is avoided, and the workload is saved; the time continuous change condition of the three-dimensional earth surface space can be reflected through image space-time grid scheduling and three-dimensional simulation, and the requirements of fine management such as natural resources, ecological environment and the like are met.
Embodiment two:
fig. 2 is a flowchart of another three-dimensional space-time simulation method for remote sensing image data according to a second embodiment of the present application.
Referring to fig. 2, applied to a client, the method includes the steps of:
step S401, receiving a grid index comprising a time stamp sent by a server, and analyzing the grid index to obtain a preset geographic range and a current window display level;
step S402, a preset geographical range and a current window display level are sent to a server, so that the server processes the preset geographical range and the current window display level to obtain a plurality of target image blocks;
in step S403, the plurality of target image blocks sent by the server are received, the plurality of target image blocks are superimposed and displayed on the three-dimensional terrain, and the target image blocks are organized in time sequence according to the time stamps of the grid indexes.
Further, step S403 includes:
and sequentially superposing and displaying each target image block on the three-dimensional terrain according to the sequence of the time stamps of each target image block.
Further, the method comprises the following steps:
in step S501, when there are multiple target image blocks overlapping in the same area on the three-dimensional terrain, each target image block is displayed by overlapping sequentially from the lower layer to the upper layer according to the sequence of the time stamps of each target image block.
Specifically, when the server transmits a plurality of target image blocks to the client, the client needs to display each target image block on the three-dimensional terrain. And according to the sequence of the time stamp of each target image block, the time stamps are uniformly overlapped and displayed on the three-dimensional terrain.
When a plurality of target image blocks are overlapped in the same region, sequentially superposing and displaying each target image block from the lower layer to the upper layer according to the sequence of the time stamp of each target image block, and finally, the uppermost layer is the target image block with the latest time.
Further, the method comprises the following steps:
step S601, constructing an image time array according to the sequence of the time stamps corresponding to each target image block;
step S602, constructing a time axis according to the superposition sequence of each target image block on the three-dimensional terrain by using the image time array.
Specifically, each target image block corresponds to a unique time point, for example, the target image block 1 corresponds to a first time point, the target image block 2 corresponds to a second time point, and the target image block 3 corresponds to a third time point. And constructing an image time array according to the sequence of the time stamps corresponding to each target image block, constructing a time axis according to the superposition sequence of each target image block on the three-dimensional terrain, and setting the time point corresponding to the uppermost target image block in a highlight state on the time axis.
Further, the method comprises the following steps:
step S701, obtaining operation instruction information of a user on a time axis, wherein the operation instruction information comprises clicking operation at a current time point;
step S702, according to the operation of clicking the current time point, the target image block corresponding to the current time point is adjusted to the uppermost layer for display.
Specifically, when the user clicks the current time point Tn on the time axis, the client adjusts the display sequence of the target image block corresponding to the current time point to the uppermost layer in real time, and the number and sequence of the rest time points on the time axis are unchanged. At this time, the highlighted time point is adjusted to the current time point Tn on the time axis.
In the embodiment, the processing process of framing, cutting and splicing the remote sensing image data is avoided, the workload is saved, and the application efficiency of the remote sensing image data is improved; the method and the device can truly reflect the continuous change condition of the three-dimensional earth surface space, and meet the requirements of fine management such as natural resources, ecological environment and the like.
The embodiment of the application provides a three-dimensional space-time simulation method of remote sensing image data, which comprises the following steps: receiving a grid index comprising a time stamp sent by a server, and analyzing the grid index to obtain a preset geographic range and a current window display level; the method comprises the steps that a preset geographic range and a current window display level are sent to a server, so that the server processes the preset geographic range and the current window display level to obtain a plurality of target image blocks; receiving a plurality of target image blocks sent by a server, superposing and displaying the plurality of target image blocks on a three-dimensional terrain, and organizing the target image blocks according to time sequence according to the time stamps of grid indexes; the processing process of framing, cutting and splicing the remote sensing image data is avoided, and the workload is saved; the time continuous change condition of the three-dimensional earth surface space can be reflected through image space-time grid scheduling and three-dimensional simulation, and the requirements of fine management such as natural resources, ecological environment and the like are met.
Embodiment III:
fig. 3 is a schematic diagram of a three-dimensional space-time simulation device for remote sensing image data according to a third embodiment of the present application.
Referring to fig. 3, applied to a server, the apparatus includes:
the remote sensing image data acquisition unit 1 is used for acquiring remote sensing image data;
the construction unit 2 is used for constructing the remote sensing image data according to a preset Geohash-T multi-level space-time standard rule grid to obtain a grid index comprising a time stamp;
the grid index sending unit 3 is used for sending the grid index to the client so that the client can analyze the grid index to obtain a preset geographic range and a current window display level;
the processing unit 4 is used for receiving the preset geographic range and the current window display level sent by the client and processing the preset geographic range and the current window display level to obtain a plurality of target image blocks;
and a target image block transmitting unit 5 for transmitting the plurality of target image blocks to the client so that the client displays the plurality of target image blocks in a superimposed manner on the three-dimensional terrain, and organizes the target image blocks in time sequence according to the time stamps of the grid indexes.
The embodiment of the application provides a three-dimensional space-time simulation device for remote sensing image data, which comprises: acquiring remote sensing image data; constructing remote sensing image data according to a preset Geohash-T multi-level space-time standard regular grid to obtain a grid index comprising a time stamp; the grid index is sent to the client so that the client analyzes the grid index to obtain a preset geographic range and a current window display level; receiving a preset geographic range and a current window display level sent by a client, and processing the preset geographic range and the current window display level to obtain a plurality of target image blocks; transmitting the target image blocks to a client so that the client displays the target image blocks in a superposition manner on the three-dimensional terrain, and organizing the target image blocks in time sequence according to the time stamps of the grid indexes; the processing process of framing, cutting and splicing the remote sensing image data is avoided, and the workload is saved; the time continuous change condition of the three-dimensional earth surface space can be reflected through image space-time grid scheduling and three-dimensional simulation, and the requirements of fine management such as natural resources, ecological environment and the like are met.
Embodiment four:
fig. 4 is a schematic diagram of a three-dimensional space-time simulation apparatus for remote sensing image data according to a fourth embodiment of the present application.
Referring to fig. 4, applied to a client, the apparatus includes:
the grid index receiving unit 6 is used for receiving the grid index including the time stamp sent by the server, and analyzing the grid index to obtain a preset geographic range and a current window display level;
the hierarchy sending unit 7 is configured to send the preset geographical range and the current window display hierarchy to the server, so that the server processes the preset geographical range and the current window display hierarchy to obtain a plurality of target image blocks;
and a display unit 8, configured to receive the plurality of target image blocks sent by the server, superimpose and display the plurality of target image blocks on the three-dimensional terrain, and organize the target image blocks in time sequence according to the time stamps of the grid indexes.
The embodiment of the application provides a three-dimensional space-time simulation device for remote sensing image data, which comprises: receiving a grid index comprising a time stamp sent by a server, and analyzing the grid index to obtain a preset geographic range and a current window display level; the method comprises the steps that a preset geographic range and a current window display level are sent to a server, so that the server processes the preset geographic range and the current window display level to obtain a plurality of target image blocks; receiving a plurality of target image blocks sent by a server, superposing and displaying the plurality of target image blocks on a three-dimensional terrain, and organizing the target image blocks according to time sequence according to the time stamps of grid indexes; the processing process of framing, cutting and splicing the remote sensing image data is avoided, and the workload is saved; the time continuous change condition of the three-dimensional earth surface space can be reflected through image space-time grid scheduling and three-dimensional simulation, and the requirements of fine management such as natural resources, ecological environment and the like are met.
The embodiment of the application also provides electronic equipment, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the steps of the three-dimensional space-time simulation method for the remote sensing image data provided by the embodiment are realized when the processor executes the computer program.
The embodiment of the application also provides a computer readable medium with a non-volatile program code executable by a processor, wherein the computer readable medium stores a computer program, and the computer program executes the steps of the three-dimensional space-time simulation method of the remote sensing image data in the embodiment when being executed by the processor.
The computer program product provided by the embodiment of the present application includes a computer readable storage medium storing a program code, where instructions included in the program code may be used to perform the method described in the foregoing method embodiment, and specific implementation may refer to the method embodiment and will not be described herein.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described system and apparatus may refer to corresponding procedures in the foregoing method embodiments, which are not described herein again.
In addition, in the description of embodiments of the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above examples are only specific embodiments of the present application, and are not intended to limit the scope of the present application, but it should be understood by those skilled in the art that the present application is not limited thereto, and that the present application is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A three-dimensional spatio-temporal simulation method of remote sensing image data, characterized by being applied to a server, the method comprising:
acquiring remote sensing image data;
constructing the remote sensing image data according to a preset Geohash-T multi-level space-time standard regular grid to obtain a grid index comprising a time stamp;
the grid index is sent to a client so that the client analyzes the grid index to obtain a preset geographic range and a current window display level;
receiving the preset geographic range and the current window display level sent by the client, and processing the preset geographic range and the current window display level to obtain a plurality of target image blocks;
and sending the target image blocks to the client so that the client displays the target image blocks in a superimposed mode on three-dimensional terrain, and organizing the target image blocks in time sequence according to the time stamps of the grid indexes.
2. The method of claim 1, wherein the remote sensing image data includes a pixel row-column range, the constructing the remote sensing image data according to a preset Geohash-T multi-level spatiotemporal standard regular grid to obtain a grid index including a time stamp, and the method comprises:
establishing a mapping relation among the remote sensing image data, the pixel row-column range and the preset Geohash-T multi-level space-time standard grid;
and constructing the grid index comprising the time stamp according to the mapping relation.
3. The method of claim 1, wherein the processing the preset geographic range and the current window display level to obtain a plurality of target image blocks comprises:
obtaining all image names and pixel range sets in the preset geographic range according to the preset geographic range and the current window display level, wherein the pixel range sets comprise a plurality of pixel ranges;
and sequentially performing parallel traversal on each image name, each display level and each pixel range to obtain the plurality of target image blocks.
4. A three-dimensional spatio-temporal simulation method of remote sensing image data, characterized in that it is applied to a client, the method comprising:
receiving a grid index comprising a time stamp sent by a server, and analyzing the grid index to obtain a preset geographic range and a current window display level;
the preset geographic range and the current window display level are sent to a server, so that the server processes the preset geographic range and the current window display level to obtain a plurality of target image blocks;
and receiving the plurality of target image blocks sent by the server, displaying the plurality of target image blocks in a superposition manner on three-dimensional topography, and organizing the target image blocks in time sequence according to the time stamps of the grid indexes.
5. The method of claim 4, wherein displaying the plurality of target image blocks superimposed on the three-dimensional terrain comprises:
and sequentially superposing and displaying each target image block on the three-dimensional terrain according to the sequence of the time stamp of each target image block.
6. The method of claim 5, further comprising:
and when a plurality of target image blocks are overlapped in the same region on the three-dimensional terrain, sequentially superposing and displaying each target image block from the lower layer to the upper layer according to the sequence of the time stamp of each target image block.
7. The method of three-dimensional spatiotemporal simulation of remote sensing image data of claim 6, further comprising:
constructing an image time array according to the sequence of the time stamps corresponding to each target image block;
and constructing a time axis according to the superposition sequence of each target image block on the three-dimensional terrain by the image time array.
8. The method of claim 7, further comprising:
acquiring operation instruction information of a user on the time axis, wherein the operation instruction information comprises clicking operation at the current time point;
and according to the operation of clicking the current time point, adjusting the target image block corresponding to the current time point to the uppermost layer for display.
9. A three-dimensional spatiotemporal simulation apparatus for remote sensing image data, applied to a server, the apparatus comprising:
the remote sensing image data acquisition unit is used for acquiring remote sensing image data;
the construction unit is used for constructing the remote sensing image data according to a preset Geohash-T multi-level space-time standard rule grid to obtain a grid index comprising a time stamp;
the grid index sending unit is used for sending the grid index to a client so that the client can analyze the grid index to obtain a preset geographic range and a current window display level;
the processing unit is used for receiving the preset geographic range and the current window display level sent by the client and processing the preset geographic range and the current window display level to obtain a plurality of target image blocks;
and the target image block sending unit is used for sending the target image blocks to the client so that the client displays the target image blocks in a superimposed mode on three-dimensional topography, and organizes the target image blocks in time sequence according to the time stamps of the grid indexes.
10. A three-dimensional spatiotemporal simulation apparatus for remote sensing image data, applied to a client, the apparatus comprising:
the grid index receiving unit is used for receiving the grid index comprising the time stamp and sent by the server, and analyzing the grid index to obtain a preset geographic range and a current window display level;
the hierarchy sending unit is used for sending the preset geographic range and the current window display hierarchy to a server so that the server processes the preset geographic range and the current window display hierarchy to obtain a plurality of target image blocks;
and the display unit is used for receiving the plurality of target image blocks sent by the server, displaying the plurality of target image blocks in a superposition manner on three-dimensional topography, and organizing the target image blocks in time sequence according to the time stamps of the grid indexes.
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