CN111966853B - Management method of remote sensing image - Google Patents
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- CN111966853B CN111966853B CN202010627773.8A CN202010627773A CN111966853B CN 111966853 B CN111966853 B CN 111966853B CN 202010627773 A CN202010627773 A CN 202010627773A CN 111966853 B CN111966853 B CN 111966853B
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- G06F16/50—Information retrieval; Database structures therefor; File system structures therefor of still image data
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Abstract
The embodiment of the application discloses a management method of remote sensing images. The method comprises the following steps: after receiving a viewing request of a thumbnail, determining a target thumbnail requested to be viewed; acquiring and displaying the target thumbnail according to the determined basic information of the target thumbnail; after a viewing request of an original image is received, determining a target original remote sensing image requested to be viewed, and displaying by utilizing a pyramid tile corresponding to the target original remote sensing image. The scheme provided by the embodiment of the application can meet the requirements of different customers on the images.
Description
Technical Field
The embodiment of the application relates to the field of information processing, in particular to a management method of remote sensing images.
Background
Many commercial remote sensing companies now publish their own original remote sensing images to a system server so that other users can view the images through a web end or a terminal device. However, the remote sensing image viewed by the user through the system server is a thumbnail constructed based on a mode of resampling the original remote sensing image. In addition, in order to ensure the smoothness of loading, the size of the thumbnail generated by resampling needs to be limited, so that the remote sensing image viewed by the user is substantially the thumbnail with limited size of the original remote sensing image.
Because the viewed remote sensing image is a thumbnail with limited size, and the clear image of the thumbnail is not only lower, but also has larger distortion, the thumbnail of the original remote sensing image can not meet the requirements of users needing to know details in the remote sensing image. If the original remote sensing image data is directly loaded for display, although the requirements of the user can be met, the original remote sensing image data is huge, so that the original remote sensing image data is directly loaded for the user who does not need to check the original remote sensing image, the loading speed is too low, and the user experience of the type is seriously influenced.
Disclosure of Invention
In order to solve any one of the above technical problems, an embodiment of the present application provides a method for managing remote sensing images.
In order to achieve the purpose of the embodiment of the present application, an embodiment of the present application provides a method for managing a remote sensing image, including:
after receiving a viewing request of a thumbnail, determining a target thumbnail requested to be viewed;
acquiring and displaying the target thumbnail according to the determined basic information of the target thumbnail;
after a viewing request of an original image is received, determining a target original remote sensing image requested to be viewed, and displaying by utilizing a pyramid tile corresponding to the target original remote sensing image.
One of the above technical solutions has the following advantages or beneficial effects:
after a viewing request of a thumbnail is received, determining a target thumbnail requested to be viewed, acquiring and displaying the target thumbnail according to basic information of the determined target thumbnail, determining a target original remote sensing image requested to be viewed after the viewing request of an original image is received, and displaying by using a pyramid tile corresponding to the target original remote sensing image, so that the mode of simultaneously viewing the original image and the thumbnail at a web end is realized, and the displayed remote sensing image can not meet the requirements of different clients.
Additional features and advantages of the embodiments 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 the practice of the embodiments of the application. The objectives and other advantages of the embodiments of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the embodiments of the present application and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and together with the examples of the embodiments of the present application do not constitute a limitation of the embodiments of the present application.
Fig. 1 is a flowchart of a method for managing remote sensing images according to an embodiment of the present disclosure;
fig. 2 is another flowchart of a method for managing a remote sensing image according to an embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more apparent, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that, in the embodiments of the present application, features in the embodiments and the examples may be arbitrarily combined with each other without conflict.
First, technical terms related to embodiments of the present application are explained to facilitate understanding of technical aspects of the present application, and the technical terms include:
1. thumbnail of original remote sensing image: obtaining a picture based on resampling an original remote sensing image;
2. tile of the pyramid of the original remote sensing image: the tile is obtained by resampling an original remote sensing image to obtain a group of pictures with continuous different proportion values, and cutting the pictures according to a certain rule, wherein the picture of the minimum level in the pyramid is the original remote sensing image, and the original remote sensing image is not cut.
3. The original remote sensing image, which is an image obtained by aerial photography or satellite shooting in the application, can be a picture or a picture formed by splicing a plurality of pictures.
Fig. 1 is a flowchart of a method for managing remote sensing images according to an embodiment of the present disclosure. As shown in fig. 1, the method comprises:
in an exemplary embodiment, the viewing request may be issued through a browsing page provided by the client, and the browsing page may be an access address of a browser or a browsing page provided by a preset application program.
In an exemplary embodiment, when it is detected that a user views a remote sensing image through a web end, only a display list and a base map are output, and a thumbnail of an original remote sensing image and the original remote sensing image are not displayed, so that the data volume loaded by a client is reduced, and the loading fluency is improved.
It should be added that, for the tidiness of the display interface, the display interface can be divided into two regions, namely a first region and a second region. The first area is used for displaying the display list, and the second area is used for displaying the base map.
The display list comprises basic information of any original remote sensing image, such as name information, acquired time information, resolution information, spatial position information and the like;
the base map may be a tile of a certain level based on the global original remote sensing image, or a tile of a certain level of the original remote sensing image of a certain region, or a map of a certain level of the two-dimensional map. Typically, when initially loaded, the loading is shown as tiles at the minimum level of the base graph.
When a user needs to inquire the existing condition of the original remote sensing image data, the display list can be inquired through inquiry conditions (such as input keywords or a condition screening function provided by a human-computer interaction interface preset by a web end), and the existing condition of the original remote sensing image data and the basic information data of any original remote sensing image can be obtained.
When a user needs to intuitively sense the spatial position of a geographical area corresponding to an original remote sensing image on the earth and the appearance characteristics of the geographical area corresponding to the original remote sensing image in the display list, the thumbnail of the original remote sensing image can be checked according to a function button provided by a human-computer interaction interface preset at a web end for checking the remote sensing image. That is, when a user browses and views the basic information of each original remote sensing image in the list, the user can click a thumbnail button for viewing a certain original remote sensing image, a web end of the user correspondingly generates a request for viewing a thumbnail of the original remote sensing image, and the server determines a target thumbnail requested to be viewed according to the received request for viewing the thumbnail, wherein the request at least comprises: and basic information of the target thumbnail, wherein the basic information comprises name information, time information and original remote sensing image name information corresponding to the target thumbnail.
102, acquiring and displaying a target thumbnail according to the determined basic information of the target thumbnail;
in an exemplary embodiment, in order to reduce the data volume loaded by the client, on the premise of meeting the viewing requirement of the user on the preliminary knowledge of the image, the thumbnail of the original remote sensing image can be loaded for displaying, wherein the thumbnail of the original remote sensing image is overlaid on the base map displayed by the web end.
In the embodiment of the application, in order to facilitate management of the original remote sensing image, the thumbnail corresponding to the original remote sensing image, the tile of the pyramid of the original remote sensing image and the like, the thumbnail of the original remote sensing image, the original remote sensing image and the tile of the pyramid of the original remote sensing image are all stored in the file server, so that after the server determines the target thumbnail, the server can obtain the corresponding thumbnail of the target remote sensing image from the file server according to the basic information of the target thumbnail.
In the embodiment of the present application, it should be noted that it is convenient to manage thumbnails of original remote sensing images, and tiles of pyramids of original remote sensing images, and the original remote sensing images need to be distributed to a system database server, and the process includes: extracting basic information and index paths of the original remote sensing image, a thumbnail of the original remote sensing image and a tile of a pyramid of the original remote sensing image, generating a metadata management table according to the extracted information, and directly storing the metadata management table into a system database. Therefore, after the publishing operation is completed, when the system database server obtains the target thumbnail which the user wants to see, the index address information corresponding to the target thumbnail is obtained from the metadata management table in the system database server according to the basic information (such as name information and time information) of the target thumbnail, the target thumbnail is obtained from the storage address corresponding to the index address in the file server according to the obtained index address information, and the target thumbnail is covered on the base map displayed in the second area (hereinafter referred to as the current view) of the previous web end.
When the scaling operation of a user on the target thumbnail is detected, the scaling operation is also synchronously performed on the base map below the target thumbnail, and when the ratio of the size of the visible geographic space range of the base map displayed by the current view in the display interface to the size of the visible geographic space range of the base map which can be displayed by the current view in the current hierarchy is not within a certain preset value range, the base map of the corresponding hierarchy is loaded to replace the base map currently covered under the target thumbnail, so that the hierarchy switching of the base map is realized, namely, the change can be performed according to the change of the visible geographic space range of the base map displayed by the current view.
Under the current hierarchy base map, if the size of the visible geographic space range of the base map displayed by the current view is 360 degrees x 180 degrees of longitude and latitude, when the target thumbnail displayed by the current view is amplified, the base map under the target thumbnail is synchronously amplified, so that the size of the visible geographic space range of the base map displayed by the current view is 320 degrees x 160 degrees, the ratio of the size of the visible geographic space range of the base map displayed by the current view in the display interface to the size of the visible geographic space range of the base map which can be displayed by the current view in the current hierarchy is calculated, the ratio is obtained by dividing the longitude and latitude (320 degrees x 160 degrees) by the longitude and latitude (360 degrees x 180 degrees), the ratio is judged to be out of a certain preset value range, if the ratio is not in the preset value range and is larger than the maximum value in the certain preset range, then a base map of a larger hierarchy needs to be loaded for replacement; on the contrary, if the ratio is smaller than the minimum value within a certain preset range, the base map with smaller hierarchy is required to be loaded for replacement, wherein generally, the smaller the hierarchy of the base map is, the larger the geographic spatial range of the base map which can be displayed on the display interface of the representation terminal device is, and the lower the recognizable resolution of the ground object can be presented. It should be added that, when the corresponding target thumbnail is not loaded, the hierarchy of the base map shown in the current view may also be switched according to the operation of the user, and the switching manner is also as described above.
In an exemplary embodiment, in order to reduce the amount of data loaded by the client, on the premise of satisfying the viewing requirement of the user for further understanding of the image, the original remote sensing image can be displayed by loading the tile of the pyramid of the original remote sensing image,
before the tile of the pyramid is displayed, if the content displayed on the web end is a thumbnail, replacing the thumbnail of the base map displayed on the previous web end with the tile of the pyramid as the thumbnail is covered on the base map of the web end; if the content displayed by the web end is the base map, the content is directly overlaid on the base map displayed by the previous web end.
When a user browses basic information of the original remote sensing images in the display list, the tile of the pyramid of one original remote sensing image can be checked according to a function button provided by a man-machine interaction interface preset at a web end and used for checking the original images. That is, when a user browses the basic information of each original remote sensing image in the viewing list, the user can click an original image viewing button for viewing a certain original remote sensing image, and a web end of the user correspondingly generates a request for viewing a tile of a pyramid of the original remote sensing image, and then the server determines a target original remote sensing image requested to be viewed according to the received request for viewing the tile of the pyramid of the original remote sensing image, wherein the request at least comprises: and basic information of the target original remote sensing, wherein the basic information comprises name information and time information.
When the technical content in step 103 is executed independently, the technical content in step 101 and step 102 may be used as a thumbnail viewing process, a viewing process of a pyramid of the original remote sensing image composed of the technical content in step 103 may be used as a viewing process of a pyramid of the original remote sensing image, and then the thumbnail viewing process and the viewing process of the pyramid of the original remote sensing image may be used as mutually independent processes, so that the technical content in step 103 may be executed independently.
According to the method provided by the embodiment of the application, after a request for viewing an original image is received, a target original remote sensing image requested to be viewed is determined, and response is carried out by utilizing a pyramid tile of the target original remote sensing image; after a viewing request of the thumbnail is received, a target thumbnail requested to be viewed is determined, the thumbnail of the original remote sensing image is used for responding, the mode that the original image and the thumbnail are viewed at the same time at a web end is achieved, and the problem that the remote sensing image displayed in the prior art cannot meet the requirements of different clients is solved.
The method provided by the embodiments of the present application is explained as follows:
in an exemplary embodiment, the raw remote sensing imagery is managed based on a mosaic dataset, wherein the mosaic dataset is an imagery service published as a geographic information system Server, ArcGIS Server.
In an exemplary embodiment, the displaying with the tile of the pyramid corresponding to the target original remote sensing image includes:
calling an ArcGIS Server image service corresponding to the mosaic dataset of the original remote sensing image;
and responding to a tile browsing and viewing request of the pyramid based on the original remote sensing image by using the image service of the ArcGIS Server.
Managing an original remote sensing image based on a mosaic data set, publishing the mosaic data set into an ArcGIS Server image service, using the ArcGIS Server to carry out service hosting, and displaying the original remote sensing image and a pyramid tile of the original remote sensing image on a web end in a mode of calling the image service. Therefore, other users with high requirements on the image can check the original remote sensing image and the pyramid tile of the original remote sensing image, and further obtain the detail part in the original remote sensing. Through the technical scheme of this application: the method can realize the mode of checking the original remote sensing image, the tile of the pyramid of the original remote sensing image and the thumbnail of the original remote sensing image at the web end so as to solve the problem that the remote sensing image displayed in the prior art can not meet the requirements of different customers.
In an exemplary embodiment, the displaying with the tile of the pyramid corresponding to the target original remote sensing image by the following method includes:
determining a hierarchy of tiles of the pyramid to be shown, including at least one of: utilizing a first preset layer as a hierarchy to be displayed; or acquiring the hierarchical data of the tiles of all pyramids of the target original remote sensing image, and taking the maximum data in the hierarchical data as the hierarchy to be displayed; or acquiring the current level of the base map shown by the current view, and taking the current level as the level to be shown;
obtaining tiles corresponding to the to-be-displayed levels from the tiles of all pyramids of the target original remote sensing image for displaying;
the level data of the tiles of the pyramid is gradually decreased, and the bigger the level data is, the lower the definition of the tiles representing the pyramid is.
When creating a pyramid tile related to an original remote sensing image based on the original remote sensing image, the pyramid tile may be created from 1 to 22 levels, or from 1 to 10 levels, and it is necessary to supplement that the number of levels of the pyramid tile is generally an integer. When the pyramid tiles of the original remote sensing image and the target pyramid are used for displaying, if the pyramid tiles of the original remote sensing image are 10 levels in total, the pyramid tiles of a first preset level can be directly used for displaying, if the first preset level is the 8 th level, the pyramid tiles of the 8 th level are directly used for displaying, and the first preset level is a preset level number. Or displaying by using the tile corresponding to the minimum level in all the pyramid tiles corresponding to the target original remote sensing image, for example, displaying by using the tile corresponding to the 10 th level in the pyramid tiles if the tile level data of the pyramid corresponding to the target original remote sensing image is 1-10 levels; or if the base map level data displayed by the current view is 8, displaying tiles corresponding to the 8 th level in all the pyramid tiles corresponding to the target original remote sensing image.
In an exemplary embodiment, the utilizing a first preset layer is used as a hierarchy to be displayed; or acquiring the level data of the tiles of all pyramids of the target original remote sensing image, and taking the maximum data level in all level data as the level to be displayed; obtaining tiles corresponding to the to-be-displayed levels from the tiles of all pyramids of the target original remote sensing image for displaying, wherein the steps of:
according to the determined hierarchy to be displayed, determining the size of a visible geographic space range which can be displayed by a current view under the hierarchy to be displayed;
and according to the determined size of the visible geographic space range and the determined hierarchy to be displayed, obtaining corresponding tiles from the tiles corresponding to the hierarchy to be displayed in all pyramids of the target original remote sensing image, and displaying the obtained tiles.
The size of the visible geographic space range which can be displayed by the current view is determined, and the size of the visible geographic space range which can be displayed by the current view is related to the terminal equipment used by the user and the hierarchy to be displayed. The range in which the display interface of the terminal device used by the user can be used to present the current view is dependent on the size of the display interface of the terminal device. Thus, the size of the visible geospatial range that the current view can exhibit varies under the hierarchy to be exhibited. If the size of the visible geographic space range which can be displayed by the current view is A when the tiles of the first preset level are used for displaying, determining the tiles to be loaded according to the determined size of the visible geographic space range; when determining the tiles to be loaded, the tiles with the minimum longitude and latitude in the pyramid tiles corresponding to the hierarchy to be displayed can be used as the starting tiles, the row and column information of the tiles to be displayed is determined according to the row and column information of the starting tiles and the size of the visible geographic space range which can be displayed under the hierarchy to be displayed by the current view, and the tiles corresponding to the row and column information of the tiles to be displayed are obtained from the tiles corresponding to the hierarchy to be displayed in all the pyramids of the target original remote sensing image.
In an exemplary embodiment, the obtaining, as a hierarchy to be displayed, a hierarchy of a base map displayed in a current view, and obtaining, from tiles of all pyramids of the target original remote sensing image, tiles corresponding to the hierarchy to be displayed, to display includes:
acquiring a visible geographic space range of a base map shown by a current view;
and according to the obtained visible geographic space range of the base map shown by the current view, obtaining tiles corresponding to the visible geographic space range of the base map shown by the current view from tiles corresponding to the to-be-shown levels in all the pyramids of the target original remote sensing image, and displaying the obtained tiles.
And according to the visual space geographical range of the tile to be displayed, removing the tiles of all pyramids corresponding to the target original remote sensing image and the tiles corresponding to the hierarchy to be displayed, and acquiring the tiles corresponding to the visual geographical range of the tiles to be displayed.
In an exemplary embodiment, in the process of displaying the tile of the pyramid corresponding to the target original remote sensing image, the method further includes:
acquiring a current level of a tile of a pyramid shown by a current view and a visible geographic space range included by the tile shown by the current view;
determining the size of the visible geographic spatial range included by the tile shown by the current view according to the visible geographic spatial range included by the tile shown by the current view;
when an operation of moving a tile of a pyramid shown in a current view is detected, determining a moving line formed in the moving operation execution process;
acquiring the visible geographic spatial range of the tile to be displayed after moving according to the visible geographic spatial range included by the tile displayed by the current view, the size of the visible geographic spatial range included by the tile displayed by the current view, the moving line and the moving direction;
and according to the visible geographic space range of the tile to be displayed after the movement and the current level of the tile of the pyramid displayed by the current view, obtaining the tile corresponding to the visible geographic space range of the tile to be displayed after the movement from the tiles corresponding to the current level in all the tiles of the pyramid of the target original remote sensing image, and displaying the obtained tile.
When a user roams (moves) the tiles of the pyramid displayed in the current view through a mouse, determining the visible geographic space range included in the moved tiles to be displayed in real time, further acquiring row and column information of corresponding levels in the pyramid, and loading and displaying corresponding tiles; in the above operation, the level of the tile of the pyramid is not changed, but only the tile of the pyramid is shown to be changed, that is, z is not changed, at least one of x and y is changed, z represents the level, and x and y respectively represent the row information and the column information of each tile. Specifically, the row and column information (x, y) of the tile corresponding to the minimum longitude and latitude within the visible geographic space range included in the tile displayed in the current view is obtained, then the row and column information (x ± 1, y ± 1) of the tile corresponding to the minimum longitude and latitude within the visible geographic space range of the tile to be displayed in the current view after the movement is determined according to the moving direction of the tile displayed in the current view when the user moves the tile through a mouse, and the row and column information of the tile to be displayed after the movement is obtained according to the tile corresponding to the minimum longitude and latitude to be displayed after the movement and the visible geographic space range included in the tile displayed in the current view. More specifically, if the moving direction is parallel to the x direction of the tile with the minimum longitude and latitude before moving, if the direction is toward the tile (x, y +1), the row and column information of the tile with the minimum longitude and latitude to be displayed after moving is (x, y-1), otherwise, the row and column information is (x, y + 1); if the moving direction is parallel to the y direction of the tile with the minimum longitude and latitude before moving, if the direction faces to the tile (x +1, y), the row and column information of the tile with the minimum longitude and latitude to be displayed after moving is (x-1, y), otherwise, the row and column information is (x +1, y); if the moving direction is the x direction of the tile with the minimum longitude and latitude before moving and a is a certain included angle, and a is not equal to 0 degrees or 90 degrees or 180 degrees or 360 degrees, if the direction faces to the tile (x +1, y +1), the row and column information of the tile with the minimum longitude and latitude to be displayed after moving is (x-1, y-1), otherwise, the row and column information is (x +1, y + 1).
By targeted acquisition of the pyramid tiles, the amount of data acquired can be reduced.
In an exemplary embodiment, in the process of displaying the tile of the pyramid corresponding to the target original remote sensing image, the method further includes:
when the fact that the zoom operation is carried out on the tile of the pyramid displayed by the current view is detected, the current level of the tile of the pyramid displayed by the current view is obtained, and whether the zoom ratio determined by the zoom operation reaches a preset ratio threshold value of the current level is judged;
if the judgment result is that the ratio threshold is reached, determining a target level corresponding to the zooming operation;
acquiring the size of a visible geographic space range which can be displayed by a current view under a target level;
determining tiles corresponding to the operation point information from all pyramid tiles corresponding to the target original remote sensing image and target level tiles according to the operation point information acquired in advance;
determining the row and column information of the tiles to be displayed in the current view according to the row and column information of the tiles corresponding to the operation points and the size of the visible geographic space range which can be displayed in the target hierarchy of the current view;
and obtaining tiles corresponding to the row and column information of the tiles to be displayed in the current view from the tiles corresponding to the target level in all the pyramids of the target original remote sensing image, and displaying the obtained tiles.
Obtaining an operation instruction of a user for zooming, and judging whether scale information generated by the operation instruction of the user for zooming reaches a preset scale threshold of a current level, wherein the threshold of each level may be the same or different, and the process also needs to judge whether the operation instruction for zooming stops, and stops executing the subsequent steps, wherein the scale threshold may be determined according to a change ratio of a size of a geographic space range displayed by the current view under the current level after the zooming operation, for example, a ratio range of the size of the geographic space range displayed by the current view under the current level after the zooming operation to the size of the geographic space range displayed by the current view under the current level is (-B to B, wherein B is greater than zero). After the ratio range is exceeded, the ratio threshold is considered to be reached, otherwise, the ratio threshold is considered not to be reached;
and if so, acquiring a target level corresponding to the zooming operation according to the threshold value of the corresponding level reached by the zooming operation instruction of the user.
When the user uses the mouse wheel to perform zooming operation, the information of the operation point can be acquired in real time. And obtaining the proportion information generated by the zooming operation in the visible geographic space range shown by the current view and the proportion information corresponding to the level information of the pyramid in real time so as to determine the target level corresponding to the zooming operation.
And acquiring an operation point on a display interface when a user operates zooming, and further acquiring row and column information of a corresponding hierarchy in the pyramid and loading and displaying a corresponding pyramid tile according to the target hierarchy, the operation point information and the geographical range of the map displayed in the current view range, so as to achieve the purpose of accurately acquiring the pyramid tile.
The remote sensing image displayed by the zooming operation is determined by taking the operation point as the center, wherein the design of the center point can be defined by self according to the requirement.
Unlike the move operation, the hierarchy of the pyramid tiles corresponding to the zoom operation is changing, as are the tiles of the pyramid shown, i.e., z, x, and y.
By judging the level of the pyramid files, the zooming operation is responded, the data loading speed can be increased, and the response efficiency is improved.
In an exemplary embodiment, after determining the target hierarchy of the pyramid file corresponding to the scaling operation, the method further includes:
determining whether the target level reaches a minimum level of the pyramid file;
and if the judgment result is that the minimum level is reached, performing cutting operation on the target original remote sensing image to obtain a temporary file, and displaying by using the temporary file.
And when the target level reaches the minimum level, the image information which indicates that the viewing request is the original remote sensing image is cut, partial data of the original remote sensing image is extracted and used for responding to the viewing request, the size of the loaded picture is controlled on the premise of ensuring the highest level data of the original remote sensing image, and the user experience is optimized.
In an exemplary embodiment, the performing a cutting operation on the target raw remote sensing image includes:
acquiring the size of a visible geographic space range of a target original remote sensing image which can be displayed by a current view;
and cutting the target original remote sensing image according to the size of the visible geographic space range of the target original remote sensing image which can be displayed by the current view, and extracting a part to be displayed in the target original remote sensing image from the segmented image obtained by cutting operation.
The original remote sensing image of the target is cut into two parts by dynamically cutting the original remote sensing image of the target, one part is used for displaying on the current view, the other part is not used for displaying, the range size of the part needing to be displayed is consistent with the visible geographic range size of the original remote sensing image of the target, which can be displayed by the current view, and during cutting, the original remote sensing image of the target can be cut according to the geographic longitude and latitude information corresponding to the operation point in the original remote sensing image of the target and the visible geographic space range size capable of being displayed by the current view. And if the longitude and latitude corresponding to the operation point is taken as the central point during cutting, cutting.
In an exemplary embodiment, the performing a cutting operation on the target raw remote sensing image includes:
obtaining the geographic space range included by the tile shown by the current view after the zooming operation;
and cutting the target original remote sensing image according to the geographic space range and the geographic space range included by the tile displayed by the current view after the zooming operation, and displaying the image in the cut target original remote sensing image which is consistent with the geographic space range.
By the embodiment, targeted extraction can be achieved, the loaded data volume is effectively controlled, and the loading speed is increased.
In an exemplary embodiment, after the displaying by using the tile of the pyramid with the target original remote sensing image, the method further includes:
and after the checking operation of the pyramid tiles of the target original remote sensing image is detected to be finished, displaying the base map in the current view.
And once the user is detected to finish viewing the pyramid-based tiles, entering an interface of a base map and a display list by triggering again an operation option for exiting the pyramid-based tile viewing service.
Fig. 2 is another flowchart of a method for managing a remote sensing image according to an embodiment of the present disclosure. As shown in fig. 2, the method enables access based on original remote sensing image data based on a hosting mode of an ArcGIS (Geographic Information System) Server remote sensing image service, accelerates access to the original remote sensing image by accessing a built pyramid file, and reduces loading of the entire original image data by acquiring corresponding interval data based on a visible Geographic space range that can be displayed by a current view.
Wherein the method comprises the following steps:
when a user views through a web end, only a display list and a base map of the remote sensing image are output, and thumbnails and original files are not displayed; when a user inquires the existing condition of the original remote sensing image data through the inquiry condition, the user can check and display the basic information data of the existing original remote sensing image through the list;
when the user is interested in comparing the spatial position (geographic position) and the basic information of the original remote sensing image in the list, outputting a corresponding function button so that the user can obtain details by the function button; when a user wants to know the image information of the original remote sensing image preliminarily, the thumbnail corresponding to the original remote sensing image can be loaded for preliminary checking, and if the requirement on details continues, the user switches to the tile of the checking pyramid to check the detail data of the remote sensing image.
After the user finishes checking, the original image based checking service can be finished by triggering to check the original image again, a base image and list interface is entered, and the checking smoothness is improved.
Wherein, the response process to the viewing request comprises the following steps:
step 01, after a user requests to view, displaying a base map and obtaining the visible geographic spatial range of the current base map displayed by the current view and the scale information of the current base map, and obtaining the level of the current base map through a scale; acquiring the level number of the corresponding pyramid file according to the level of the base map, and determining the row and column information of the tiles to be displayed in the corresponding pyramid according to the visible geographic range of the base map displayed by the current view; and then obtaining the tile of the corresponding pyramid, and displaying the tile on the terminal equipment.
By obtaining the level and row and column information of the base map to determine the tiles in the pyramid, the amount of data obtained can be reduced.
Step 02, when a user roams (moves) the map through a mouse, acquiring a visual geographic space range displayed by a corresponding current view in real time, further acquiring row and column information of a corresponding level in a pyramid and loading and displaying tiles of the corresponding pyramid; (in this operation, the hierarchy of the pyramid tiles is unchanged, only the pyramid tiles shown are changed, i.e., z is unchanged, x and y are changed, z represents the hierarchy, and x, y represent the coordinates of the respective tile maps)
03, when the user uses the mouse wheel to perform zooming operation, acquiring the proportion information in the corresponding visible geographic space range in real time to correspond to the hierarchy information of the pyramid, and repeating the process of the step 02; the method comprises the following specific steps:
acquiring an operation instruction of a user for zooming;
acquiring an operation point on a display interface when the user operates zooming according to the operation instruction;
judging whether the operation instruction of the user zooming reaches a preset threshold value or not;
if so, acquiring the information of the corresponding hierarchy according to the threshold value of the corresponding hierarchy reached by the operation instruction of the user scaling;
and according to the corresponding hierarchy information, the operation point information and the geographic range of the visual map displayed in the current view range, further acquiring the row and column information of the corresponding hierarchy in the pyramid and loading and displaying the tiles of the corresponding pyramid.
And step 04, when the level of the original image data is reached, the service can perform dynamic cutting operation on the original image data, and certain delay is generated compared with the situation that a pyramid file is directly accessed, but the number of loaded pictures can be controlled under the level of the original remote sensing image, so that the user experience is optimized.
The method provided by the embodiment of the application has the following advantages that:
1. aiming at the viewing requirements of users, data are loaded in a targeted manner, and the network traffic transmission quantity is reduced;
2. through different levels of the pyramid files, the fine understanding degree of the user on the original remote sensing image data is increased;
3. the display mode of thumbnails, pyramids and original remote sensing images is adopted, different viewing requirements are met, and user experience is improved;
4. and reserving a display mode of generating a thumbnail by using resampling, providing a mode of switching to a tile of a loading pyramid, and dynamically loading the original remote sensing image through a view range so as to reduce network transmission amount, web end display load and the like.
An embodiment of the present application provides a storage medium, in which a computer program is stored, wherein the computer program is configured to perform the method described in any one of the above when the computer program runs.
An embodiment of the application provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to perform the method described in any one of the above.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
Claims (9)
1. A management method of remote sensing images comprises the following steps:
after receiving a viewing request of a thumbnail, determining a target thumbnail requested to be viewed;
acquiring and displaying the target thumbnail according to the determined basic information of the target thumbnail;
after receiving a viewing request of an original image, determining a target original remote sensing image requested to be viewed, and displaying by using a pyramid tile corresponding to the target original remote sensing image;
in the process of displaying the tile of the pyramid corresponding to the target original remote sensing image, the method further includes:
when the fact that the zoom operation is carried out on the tile of the pyramid displayed by the current view is detected, the current level of the tile of the pyramid displayed by the current view is obtained, and whether the zoom ratio determined by the zoom operation reaches a preset ratio threshold value of the current level is judged;
if the judgment result is that the ratio threshold is reached, determining a target level corresponding to the zooming operation;
acquiring the size of a visible geographic space range which can be displayed by a current view under a target level;
determining tiles corresponding to the operation point information from tiles of all pyramids corresponding to the target original remote sensing image and tiles of the target level according to the operation point information acquired in advance;
determining the row and column information of the tiles to be displayed in the current view according to the row and column information of the tiles corresponding to the operation points and the size of the visible geographic space range which can be displayed in the target hierarchy of the current view;
and obtaining tiles corresponding to the row and column information of the tiles to be displayed in the current view from the tiles corresponding to the target level in all the pyramid tiles of the target original remote sensing image, and displaying the obtained tiles.
2. The method of claim 1, wherein:
the original remote sensing image is managed based on a mosaic data set, wherein the mosaic data set is an image service published as a geographic information system Server ArcGIS Server;
the displaying by using the tile of the pyramid corresponding to the target original remote sensing image comprises the following steps:
calling an ArcGIS Server image service corresponding to the mosaic dataset of the original remote sensing image;
and responding to a tile browsing and viewing request of the pyramid based on the original remote sensing image by using the image service of the ArcGIS Server.
3. The method of claim 1, wherein the displaying with the tile of the pyramid corresponding to the target original remote sensing image comprises:
determining a hierarchy of tiles of the pyramid to be shown, including at least one of: utilizing a first preset layer as a hierarchy to be displayed; or acquiring the hierarchical data of the tiles of all pyramids of the target original remote sensing image, and taking the maximum data hierarchy in the hierarchical data as the hierarchy to be displayed; or acquiring the current level of the base map shown by the current view, and taking the current level as the level to be shown;
obtaining tiles corresponding to the to-be-displayed levels from the tiles of all pyramids of the target original remote sensing image for displaying;
the level data is gradually decreased, and the greater the level data of the tiles of the pyramid is, the lower the definition of the tiles representing the pyramid is.
4. The method according to claim 3, wherein the utilizing a first preset level is as a level to be displayed; or acquiring the level data of the tiles of all pyramids of the target original remote sensing image, and taking the maximum data level in all level data as the level to be displayed; obtaining tiles corresponding to the to-be-displayed levels from the tiles of all pyramids of the target original remote sensing image for displaying, wherein the steps of:
according to the determined hierarchy to be displayed, determining the size of a visible geographic space range which can be displayed by a current view under the hierarchy to be displayed;
and according to the determined size of the visible geographic space range and the determined hierarchy to be displayed, obtaining corresponding tiles from the tiles corresponding to the hierarchy to be displayed in all pyramids of the target original remote sensing image, and displaying the obtained tiles.
5. The method according to claim 3, wherein the obtaining a current level of a base map shown in a current view, taking the current level as a level to be shown, and obtaining tiles corresponding to the level to be shown from tiles of all pyramids of the target original remote sensing image for display comprises:
acquiring a visible geographic space range of a base map shown by a current view;
and according to the obtained visible geographic space range of the base map shown by the current view, obtaining tiles corresponding to the visible geographic space range of the base map shown by the current view from tiles corresponding to the to-be-shown levels in all the pyramids of the target original remote sensing image, and displaying the obtained tiles.
6. The method of claim 1, wherein during the displaying of the tile of the pyramid corresponding to the target original remote sensing image, the method further comprises:
acquiring a current level of a tile of a pyramid shown by a current view and a visible geographic space range included by the tile shown by the current view;
determining the size of the visible geographic spatial range included by the tile shown by the current view according to the visible geographic spatial range included by the tile shown by the current view;
when an operation of moving a tile of a pyramid shown in a current view is detected, determining a moving line formed in the moving operation execution process;
acquiring the visible geographic spatial range of the tile to be displayed after moving according to the visible geographic spatial range included by the tile displayed by the current view, the size of the visible geographic spatial range included by the tile displayed by the current view, the moving line and the moving direction;
and according to the visible geographic space range of the tile to be displayed after the movement and the current level of the tile of the pyramid displayed by the current view, obtaining the tile corresponding to the visible geographic space range of the tile to be displayed after the movement from the tiles corresponding to the current level in all the tiles of the pyramid of the target original remote sensing image, and displaying the obtained tile.
7. The method of claim 1, wherein after determining the target level to which the scaling operation corresponds, the method further comprises:
judging whether the target level reaches the minimum level in the levels of the tiles of all pyramids of the target original remote sensing image;
and if the judgment result is that the minimum level is reached, performing cutting operation on the target original remote sensing image to obtain a temporary file, and displaying by using the temporary file.
8. The method of claim 7, wherein the performing a cutting operation on the target raw remote sensing image comprises:
acquiring the size of a visible geographic space range of a target original remote sensing image which can be displayed by a current view;
and cutting the target original remote sensing image according to the size of the visible geographic space range of the target original remote sensing image which can be displayed by the current view, and extracting a part to be displayed in the target original remote sensing image from the segmented image obtained by cutting operation.
9. The method of claim 1, wherein after the displaying with the tile of the pyramid with the target original remote sensing image, the method further comprises:
and after the checking operation of the pyramid tiles of the target original remote sensing image is detected to be finished, displaying the base map in the current view.
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