CN114048280B - Vector slice processing method, device, server and storage medium - Google Patents
Vector slice processing method, device, server and storage medium Download PDFInfo
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Abstract
The application provides a vector slice processing method, a vector slice processing device, a server and a storage medium. The method comprises the following steps: receiving a service request of a user terminal, wherein the service request carries a first coordinate set of tiles to be displayed in a current visible area of the user terminal; reading a metafile corresponding to the service request from a storage module of the server into a memory of the server, and acquiring a vector element corresponding to the first coordinate set from the metafile as a target element metafile to be processed; rendering a layer corresponding to the target element file according to a preset display condition in the service request; converting the rendered image content slices of the target element metafile into areas corresponding to the tiles to obtain target tiles; and sending the target tile to the user terminal so that the user terminal displays the target tile in the current visible area. According to the scheme, all the element files do not need to be sliced to generate the tiles, so that the processing pressure of vector slicing of the server is reduced.
Description
Technical Field
The present application relates to the field of image processing technologies, and in particular, to a method and an apparatus for processing a vector slice, a server, and a storage medium.
Background
The vector data based on the geographic image can be converted into related OGC (Open geographic information Consortium) standard vector services for use by related users. In the process of calling vector data or calling vector tiles which are cut in advance by a user, a rendering style is usually set by the user terminal at present, and the vector tiles are rendered at the user terminal. Or rendering vector tiles which have been cut in advance by the server. The pre-cut vector tiles require a user to complete style setting of various elements in vector data in the early period, and then consume a large amount of time to execute slicing operation, so that the server has high processing pressure on vector slicing.
Disclosure of Invention
An object of the embodiments of the present application is to provide a method and an apparatus for processing vector slices, a server, and a storage medium, which implement on-line obtaining of tiles with different user requirements through on-line tile trimming, and can reduce the computation of a user terminal and improve the problem of high processing pressure of the server on vector slices.
In order to achieve the above object, embodiments of the present application are implemented as follows:
in a first aspect, an embodiment of the present application provides a method for processing a vector slice, where the method includes: step S1, receiving a service request of a user terminal, wherein the service request carries a first coordinate set of tiles to be displayed in a current visible area of the user terminal; step S2, reading a metafile corresponding to the service request from a storage module of a server into a memory of the server, and obtaining a vector element corresponding to the first coordinate set from the metafile as a target element metafile to be processed; step S3, determining that the target element metafile to be processed is the same coordinate system; step S5, rendering the image layer corresponding to the target element metafile according to the preset display condition in the service request; step S6, converting the rendered image content slice of the target element metafile into an area corresponding to the tile to obtain a target tile; step S7, sending the target tile to the user terminal, so that the user terminal displays the target tile in the current visible area.
In the above embodiment, the server renders only the target element metafile corresponding to the tile to be displayed in the current visible area of the user terminal, and does not need to render other element metafiles outside the current visible area, thereby reducing the amount of computation. In addition, the target element metafile slices are converted into the tile areas to be displayed to obtain the target tiles, and then the target tiles are sent to the user terminal, so that all the element files do not need to be sliced to generate the tiles, and the processing pressure of the server vector slices is favorably reduced.
With reference to the first aspect, in some optional embodiments, between step S3 and step S5, step S4 is further included to perform an online rectification operation on the target element metafile to be processed, where the online rectification operation includes:
and performing online rectification operation on the specified metafile which is judged by the coordinate system according to the received operation request aiming at the specified element of the specified metafile, wherein the operation request is an online request.
With reference to the first aspect, in some optional embodiments, before receiving the service request of the user terminal at step S1, and/or before sending the target tile to the user terminal at step S7, the method further includes: according to a preset detection rule, carrying out standardized detection on received vector data based on an image; and storing the vector data subjected to standardization detection as a metafile into the storage module of the server.
In the above embodiment, by performing the standardized detection on the vector data and then storing the detected vector data in the storage module of the server, it can be ensured that the stored vector data is the data with the uniform standard, so that the vector data provided by the user can better provide services for the subsequent service.
With reference to the first aspect, in some optional embodiments, the preset detection rule includes at least one of the following rules:
integrity detection rules for performing integrity detection on the vector data;
a logical consistency detection rule for performing logical consistency detection on the vector data;
a value range consistency detection rule for performing value range consistency detection on the vector data;
a format consistency detection rule for performing format consistency detection on the vector data;
a topology consistency detection rule for performing topology consistency detection on the vector data;
and the edge connection consistency detection rule is used for carrying out edge connection consistency detection on the vector data.
With reference to the first aspect, in some optional embodiments, the step S3 determines that the target element files to be processed are in the same coordinate system, and includes: judging whether a second coordinate system of a second coordinate set of the tile where the metafile is located is the same as a first coordinate system of the first coordinate set; and when the second coordinate system is different from the first coordinate system, converting the second coordinate set of the tile where the metafile is located into coordinates under the first coordinate system.
With reference to the first aspect, in some optional embodiments, the operation request includes one or more of the following requests:
a first request for adding a specified element in the specified metafile;
a second request for deleting a specified element in the specified metafile;
a third request for modifying a specified element in the specified metafile;
a fourth request for filtering specified elements in the specified metafile.
With reference to the first aspect, in some optional embodiments, the step S7 of sending the target tile to the user terminal includes: and sending the target tile to the user terminal in a specified image format corresponding to the service request, wherein the specified image format comprises a plurality of different image formats.
In a second aspect, the present application further provides an apparatus for processing vector slices, the apparatus comprising: a receiving unit, configured to receive a service request of a user terminal, where the service request carries a first coordinate set of tiles to be displayed in a current visible area of the user terminal; an obtaining unit, configured to read a metafile corresponding to the service request from a storage module of a server into a memory of the server, and obtain a vector element corresponding to the first coordinate set from the metafile as a target element metafile to be processed; the determining unit is used for determining the target element metafiles to be processed to be in the same coordinate system; the rendering unit is used for rendering the image layer corresponding to the target element metafile according to a preset display condition in the service request; the slice conversion unit is used for converting the rendered image content slice of the target element metafile into a region corresponding to the tile to obtain a target tile; a sending unit, configured to send the target tile to the user terminal, so that the user terminal displays the target tile in the current visible area.
In a third aspect, the present application further provides a server, which includes a processor and a memory coupled to each other, and a computer program is stored in the memory, and when the computer program is executed by the processor, the server is caused to execute the method described above.
In a fourth aspect, the present application also provides a computer-readable storage medium having stored thereon a computer program which, when run on a computer, causes the computer to perform the method described above.
The method for generating the dynamic vector for updating and modifying on line is provided on the basis of the existing functions of a third-party service hosting platform, can better meet the control and maintenance cost of application cost, meets the requirements of users, and reduces the pressure of the server. The beneficial technical effects that it can realize include:
dynamic rectification of vector data metafiles: under different application scenes, various operations of modifying and updating the vector data are regulated into the vector data metafile by corresponding users, and meanwhile, the uniformity of modifying content and standards of the vector data metafile is guaranteed by utilizing a check module (namely a preset detection rule) of the vector data;
providing functions of conventional spatial query, statistics, analysis and the like: through the support of the bottom layer function, the functions of common inquiry, statistics, analysis and the like are independent for providing the requirements of different application scenes, and meanwhile, the autonomous controllability of the prior art can be better realized;
multiple return data formats support: the returned data standard format can be dynamically switched according to different application scenes of a user, and the requirements of various formats are met.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic diagram of a communication connection between a user terminal and a server according to an embodiment of the present application.
Fig. 2 is a flowchart of a processing method of a vector slice according to an embodiment of the present disclosure.
Fig. 3 is a second flowchart of a processing method of vector slices according to an embodiment of the present application.
Fig. 4 is a block diagram of a processing apparatus for vector slicing according to an embodiment of the present application.
Icon: 10-a server; 11-a processing module; 12-a storage module; 20-a user terminal; 200-a processing device; 210-a receiving unit; 220-an acquisition unit; 230-a determination unit; 240-a rendering unit; 250-a slice conversion unit; 260-sending unit.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. It should be noted that the terms "first," "second," and the like are used merely to distinguish one description from another, and are not intended to indicate or imply relative importance. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Referring to fig. 1, the present application provides a server 10 capable of data interaction with a user terminal 20. The user may request the presentation of the corresponding tile map from the server 10 using the user terminal 20. Wherein the server 10 may render the image-based vector data and dynamically generate tiles to reduce stress on the user terminal 20. It should be noted that a tile may be understood as a square region as a region in the composition map. A complete map may be composed of a plurality of map tiles.
In this embodiment, the server 10 may include a processing module 11 and a storage module 12. The storage module 12 stores therein a computer program which, when executed by the processing module 11, enables the server 10 to execute the steps of the vector slice processing method described below.
It is understood that the configuration shown in fig. 1 is merely a schematic diagram of the configuration of the server 10, and that the server 10 may include more components than those shown in fig. 1. The components shown in fig. 1 may be implemented in hardware, software, or a combination thereof. For example, the server 10 may further include a communication module for establishing a communication connection with the user terminal 20.
Referring to fig. 2, the present application further provides a method for processing vector slices, which can be applied in the server 10, and the server 10 executes or implements the steps in the method, where the method includes the following steps:
step S1, receiving a service request of a user terminal, wherein the service request carries a first coordinate set of tiles to be displayed in a current visible area of the user terminal;
step S2, reading a metafile corresponding to the service request from a storage module of a server into a memory of the server, and obtaining a vector element corresponding to the first coordinate set from the metafile as a target element metafile to be processed;
step S3, determining the target element metafile to be processed as the same coordinate system;
step S5, rendering the image layer corresponding to the target element metafile according to the preset display condition in the service request;
step S6, converting the rendered image content slice of the target element metafile into an area corresponding to the tile to obtain a target tile;
step S7, sending the target tile to the user terminal, so that the user terminal displays the target tile in the current visible area.
In the above embodiment, the server 10 renders only the target element metafile corresponding to the tile to be displayed in the current visible area of the user terminal 20, and there is no need to render other element metafiles outside the current visible area, thereby reducing the amount of computation. In addition, the target tile is obtained by converting the target element metafile slice into the tile area to be displayed, and then the target tile is sent to the user terminal 20, so that all the element files do not need to be sliced to generate the tile, thereby being beneficial to reducing the processing pressure of the server 10 on the vector slice. Moreover, the user terminal 20 does not need to render tiles, which is beneficial to reducing the computation load of the user terminal 20.
The following details the steps in the process are as follows:
before steps S1 and/or S7, the method may further include the step of storing the metafile in the storage module 12 of the server 10. For example, prior to step S1, or prior to S7 (e.g., between step S6 and step S7), the method may include:
step S11, according to the preset detection rule, carrying out standardization detection on the received vector data based on the image;
step S12, storing the normalized detected vector data as a meta file in the storage module 12 of the server 10.
Understandably, before step S1, the method may include steps S11 and S12; or between step S6 and step S7, the method may include step S11 and step S12; alternatively, step S11 and step S12 may be included before step S1 and between step S6 and step S7. By performing standardized detection on the vector data and then storing the detected vector data in the storage module 12 of the server 10, it can be ensured that the stored vector data is unified data, so that the vector data provided by the user can better serve the subsequent services. For example, it is convenient for the server 10 to provide the corresponding tile service to the user by using the stored vector data.
The content included in the vector data can be flexibly determined according to the actual situation. For example, in the vector data, image data of a point, a line, a plane, and the like may be included, and each vector data may have a corresponding attribute. For example, a point may be used to refer to an object, such as a building, a valve, etc. A line may refer to a road or a pipe. A plane may refer to an area, such as a residential cell.
In step S11, the preset detection rule may be flexibly determined according to actual situations. For example, the preset detection rule may include, but is not limited to, one or more of integrity detection rule, value range consistency detection rule, format consistency detection rule, topology consistency detection rule, and edge consistency detection rule.
In this embodiment, the integrity check rule is used to perform integrity check on the vector data. For example, the integrity check rule may sequentially check various types of data in the vector data according to various contents in a preset check entry. The detection items in the detection table items can be flexibly determined according to actual conditions. For example, the integrity check rule may check spatial data, document data, attribute data, and the like in the vector data to determine whether there is omission or redundancy in the data.
For example, the integrity detection rule may detect whether the geographic coverage in the spatial data is complete, whether there are redundant layers, whether there are omissions, and the like. The integrity detection rule may also detect whether there is a omission or redundancy in a data table, a data item, or the like in the attribute data.
The determination method of whether there is omission or redundancy is well known to those skilled in the art, and will not be described herein.
In addition, the integrity detection rule can also be used for detecting whether the file composition of the vector data is complete, whether the file name is standard, and the like. The file composition can be flexibly determined according to actual conditions, for example, in a file composition meeting the standard requirements, files such as ". shp", ". dbf", ". shx", ". prj", ". cpg" in an shp file may be included. Of course, other types of files may also be included in the file composition, for example, files known to those skilled in the art such as geojson may be included. If partial files in the standard requirement are missing in the current vector data, the vector data is considered to be incomplete. In addition, the detection mode of naming whether to be standardized can be flexibly determined according to the actual situation, and is not specifically limited herein.
And the logic consistency detection rule is used for carrying out logic consistency detection on the vector data. For example, the logical consistency detection rule may detect whether the element hierarchy and the attribute data in the spatial data are consistent with a preset reference standard. The preset reference standard can be flexibly determined according to actual conditions. The logic consistency detection gauge can detect whether an attribute table and a reference attribute table of elements in the layer are consistent or not, and attributes in the attribute table are consistent with logics of corresponding ground features in the layer. If the logics of all the data in the vector data are consistent, the detection of logical consistency is confirmed to pass. If any of the logics is not consistent, it is confirmed that the detection of the logic consistency of the vector data fails.
And the value range consistency detection rule is used for carrying out value range consistency detection on the vector data. For example, the value range consistency detection rule may detect whether the value of the attribute table numerical data item in the vector data is within a set range, and the set range may be flexibly determined according to the actual situation. And if the values of the numerical data items of all the attribute tables are in the corresponding set ranges, confirming that the vector data passes the detection of the consistency of the value ranges. And if the value of any one attribute table numerical data item is not in the corresponding set range, confirming that the vector data does not pass the detection of the value range consistency.
And the format consistency detection rule is used for carrying out format consistency detection on the vector data. For example, the format consistency detection rule may be used to detect whether the formats of the spatial data, the attribute table data, and the document data in the vector data are in the corresponding preset formats, and if the formats of the data of all the items are in the corresponding preset formats and the format of the file name is in the corresponding named format, it is determined that the vector data passes the detection of the format consistency, otherwise, it is determined that the vector data does not pass the detection of the format consistency.
And the topological consistency detection rule is used for carrying out topological consistency detection on the vector data. For example, the topology consistency detection rule may be used to detect whether there is an overlap between faces in the same layer, whether there is a gap between faces, whether there is an error in a ring node, and the like, and whether there is an overlap between elements of lines in the same layer, whether there is a self-intersection of lines, whether there is a hanging point, and the like. The detection method is well known to those skilled in the art, and will not be described herein.
And the edge connection consistency detection rule is used for carrying out edge connection consistency detection on the vector data. For example, the border consistency detection rule may be used to detect whether the entity attribute structure and the attribute content corresponding to the border between adjacent graphs are consistent, and the detection method is well known to those skilled in the art and is not described herein again.
Understandably, when the detection of all items of the vector data is completed and the detection of all items is passed, the vector data is considered as data meeting the uniform standard, and at this time, the vector data may be stored as a metafile in the storage module 12 of the server 10.
If the detection of any item in the vector data fails, the user may be prompted to adjust the failed item, and then the adjusted vector data may be uploaded to the server 10 again to perform the detection in step S11, so that the adjusted vector data is the data meeting the unified standard.
In step S12, the normalized vector data is the vector data that all the tests have passed, and is the unified vector data, which is convenient for preparing for the subsequent data processing. In addition, the tile where the image content of the metafile is located is associated with the position coordinates in the map, so that the corresponding metafile can be conveniently and accurately indexed based on the coordinates of the tile requested by the user.
In step S1, the service request is a request sent to the server 10 by the user terminal 20 when the user needs to view the geographical map. The area of the display area of the user terminal 20 for displaying the map or tiles, which is understandable for the current viewable area, may be part or all of the entire display area of the user terminal 20.
For example, the display area of the user terminal 20 may be divided into an a area and a B area, and the a area may be a current visible area to display a map. The B area may be used to display other information. Alternatively, both the a area and the B area may be current visible areas, and may be used to display a map.
The first set of coordinates may be understood as the set of coordinates for tiles within the current visible area. If the number of the tiles in the current visible area is one, the coordinates in the first coordinate set are the coordinates of one tile; if the number of the tiles in the current visible area is multiple, the first coordinate set comprises the coordinates of the multiple tiles.
In step S2, after receiving the service request, the server 10 may read the corresponding metafile from the storage module 12. The server 10 can acquire only the vector element corresponding to the first coordinate set from the metafile without acquiring another vector element not corresponding to the first coordinate set, thereby reducing the amount of data computation.
Wherein the metafile is associated in advance with the coordinates of the respective tile in which it is located in the map. The metafile includes a plurality of vector elements corresponding to the coordinates. The vector elements can be located in one tile or distributed in a plurality of tiles, and flexible division can be performed according to actual situations. Vector elements may be, but are not limited to, points, lines, planes, etc.
In step S3, it may be detected whether a transformation of the coordinates of the metafile is required to ensure that the coordinate system of the tile in the metafile is the same as the coordinate system of the tile corresponding to the request.
For example, step S3 may include:
judging whether a second coordinate system of a second coordinate set of the tile where the metafile is located is the same as a first coordinate system of the first coordinate set;
and when the second coordinate system is different from the first coordinate system, converting the second coordinate set of the tile where the metafile is located into coordinates under the first coordinate system.
In general, the coordinate system of the tile where the metafile is located (i.e. the first coordinate system) needs to be the same as the coordinate system where the tile is located in the service request (i.e. the second coordinate system). If the first coordinate system is the same as the second coordinate system, the coordinates of the tile where the metafile is located do not need to be subjected to coordinate conversion. If the first coordinate system is different from the second coordinate system, the coordinates of the tile where the metafile is located need to be converted to the coordinates under the second coordinate system, so that the unification of the coordinate systems is realized, and the position searching and the positioning are convenient. The determination method of the first coordinate system and the second coordinate system is well known by those skilled in the art (for example, for a plurality of objects at different positions, whether the respective coordinates in the first coordinate system and the second coordinate system are the same, and if the respective coordinates are the same, it indicates that the first coordinate system is the same as the second coordinate system), and details thereof are not repeated here.
In step S5, the preset display conditions include, but are not limited to, an image display magnification ratio, a layer to be displayed, and an element to be displayed, and may be set according to actual situations. For example, the user may set a specified element to be displayed or not to be displayed. The designated elements can be designated points, lines or other elements, such as ground feature information of buildings, water bodies and the like, and can be flexibly determined according to actual conditions. In this embodiment, the server 10 renders the target element metadata file based on the preset display condition, so that the flexibility of rendering can be improved, and a user-defined rendering mode can be supported, so as to better meet the use requirements of the user in different application scenes. The server 10 may automatically filter the vector layer that is not required to be displayed by the user according to the requirement of the user on the vector data display layer, so as to reduce the content of data interaction, and meanwhile, may also implement different dynamic changes of the display vector layer according to different proportions set by the user. In addition, the user terminal 20 does not need to render the target element metafile, which is advantageous for reducing the amount of computation of the user terminal 20.
In step S6, the server 10 may flexibly divide the image content of the rendered target element metafile into corresponding tiles according to the tiles to be displayed in the current visible area of the user terminal 20, so as to generate a rendered tile map, and render and slice the metafile outside the tile area to be displayed is not required, so as to reduce the data processing amount.
In step S7, the target tile is the tile map that needs to be displayed in the current visible area of the user terminal 20. Upon receiving the target tile, user terminal 20 may present the image content of the target tile within the viewable area.
In this embodiment, step S7 may include: and sending the target tile to the user terminal 20 in a specified image format corresponding to the service request, wherein the specified image format comprises a plurality of different image formats.
Understandably, the service request may carry a tile image format supported by the user terminal 20, where the image format is a designated image format, and may be but is not limited to image formats such as JPG, PNG, JSON, and the like, and may be determined flexibly according to actual situations. In addition, the multiple image formats can be dynamically switched according to the requirements of users. Therefore, a user can flexibly convert the data format of the tile according to different application scenes so as to meet the display requirement.
Referring to fig. 3, in this embodiment, when the metafile needs to be maintained and updated, the user may directly modify the metafile in the storage module 12. As an alternative implementation, between step S3 and step S5, the method may further include step S4, performing an online rectification operation on the target element metafile to be processed. Further, step S4 may include: and performing online rectification operation on the specified metafile which is judged by the coordinate system according to the received operation request aiming at the specified element of the specified metafile, wherein the operation request is an online request.
Specifically, the user can generate an operation request for a specified element of the specified metafile according to a preset display condition of the user, and perform online rectification operation on the specified metafile. Therefore, the online rectification operation of the designated metafile can be flexibly adjusted according to the requirement of the user on the preset display condition, so that the displayed vector layer can be dynamically rectified according to the requirement of the user, the requirement of the user is effectively met, and meanwhile, the dynamic generation of the related vector tiles can be directly carried out on the basis of the metadata without depending on a third-party database or platform.
Understandably, the operation request can be flexibly determined according to the actual situation. For example, the operation request includes at least one of the following requests:
a first request for adding a specified element in the specified metafile;
a second request for deleting a specified element in the specified metafile;
a third request for modifying a specified element in the specified metafile;
a fourth request for filtering specified elements in the specified metafile.
In the present embodiment, the specified elements may be flexibly determined according to actual situations, and are not particularly limited herein. When one or more elements in the metafile need to be modified, the user may send an operation instruction to the server 10 by using the user terminal 20, so that the server 10 responds to the operation instruction, and thus may perform operations such as adding elements, deleting elements, modifying elements, and filtering elements in the corresponding metafile.
The modification element can be the modification of the shape and size of the element, and can be flexibly modified according to the actual situation. The filtering element may be that the specified element is not displayed in the specified layer, and the specified element is displayed in other layers so as to meet the filtering of the user.
Illustratively, in a specific embodiment, if the online rectification operation is to add a specified element to the specified metafile, the steps executed include: requesting to specify a metafile and acquiring metafile data; adding a specified element in a specified metafile, generating a metafile containing the specified element, namely a target metafile, and storing the target metafile in a server;
if the online rectification operation is to delete the specified element in the specified metafile, the execution steps comprise: requesting all metafiles where the specified elements are located and acquiring the metafile data, deleting the specified elements in the metafile data, generating a newly generated metafile with the deleted specified elements, and storing the newly generated metafile, namely a target metafile, in a server;
if the online rectification operation is to rectify a specified element in the specified metafile, the execution steps include: requesting all metafiles where specified elements are located and acquiring all tiles where the metafiles are located; deleting specified elements in all tiles where the metafile is located to obtain a tile set with the specified elements deleted; extracting specified elements in all tiles where the metafile is located, modifying the specified elements, and generating modified specified elements; and finally, adding the modified specified elements into the tile set from which the specified elements are deleted to obtain a target metafile, and storing the target metafile in a server. Wherein the modification operation may render, zoom in or zoom out, etc. The specified elements may be points, lines, bodies of water, buildings, etc.
If the online rectification operation is to filter the specified elements in the specified metafile, the execution steps include: requesting all metafiles where specified elements are located and acquiring all tiles where the metafiles are located; deleting specified elements in all tiles where the metafile is located to obtain a tile set with the specified elements deleted; extracting specified elements in all tiles where the metafile is located, filtering and judging the specified elements in all the tiles where the metafile is located, and if the specified elements in the tiles are equal to the specified elements to be filtered, excluding the elements; if the specified element in the tile is not equal to the specified element to be filtered, the element is reserved; and finally, adding the reserved elements into the tile set with the deleted specified elements to obtain a target metafile, and storing the target metafile in a server.
It should be noted that the modified designated metafile may be stored as a temporary file, and may not be required to be permanently modified. That is, the server 10 may store the designated metafile before the modification and the designated metafile after the modification, which is convenient for the user to refer to and compare.
When the metafile is modified and the server 10 receives the service request, during the execution of the steps S1 to S7, if the metafile corresponding to the service request is the modified metafile, the modified metafile is rendered and the tile is generated. That is, when there is a metafile modification, it is not necessary to process the tiles of the entire layer, and only the relevant tiles are dynamically generated for the tile area related to the element, and it is not necessary to completely regenerate the tiles for the entire visible area, so as to reduce the data processing amount of the server 10.
If the metafile corresponding to the service request does not relate to the modified metafile, rendering can be continued by the unmodified metafile, and the tile can be generated.
Based on the above design, the user can dynamically modify the elements in the metafile, respond to the non-permanent modification operation of the user, and update the tiles in a small area (referring to the current visible area of the user terminal 20) without performing full-image rendering, so as to reduce the number of tile modification updates.
Referring to fig. 4, the present embodiment further provides a processing apparatus for vector slicing, which is referred to as a processing apparatus 200 for short. The processing device 200 may be applied in the server 10 described above for performing the steps in the method. The processing device 200 includes at least one software functional module which can be stored in the form of software or Firmware (Firmware) in the storage module 12 or solidified in an Operating System (OS) of the server 10. The processing module 11 is used for executing executable modules stored in the storage module 12, such as software functional modules and computer programs included in the processing device 200.
The processing apparatus 200 may include a receiving unit 210, an acquiring unit 220, a determining unit 230, a rendering unit 240, a slice converting unit 250, and a transmitting unit 260. The functions possessed by each unit may be as follows:
a receiving unit 210, configured to receive a service request of a user terminal 20, where the service request carries a first coordinate set of a tile to be displayed in a current visible area of the user terminal 20;
an obtaining unit 220, configured to read a metafile corresponding to the service request from a storage module 12 of the server 10 into a memory of the server 10, and obtain a vector element corresponding to the first coordinate set from the metafile as a target element metafile to be processed;
a determining unit 230, configured to determine that the target element metafiles to be processed are in the same coordinate system;
a rendering unit 240, configured to render, according to a preset display condition in the service request, a layer corresponding to the target element metafile;
a slice conversion unit 250, configured to convert an image content slice of the rendered target element metafile into an area corresponding to the tile, so as to obtain a target tile;
a sending unit 260, configured to send the target tile to the user terminal 20, so that the user terminal 20 displays the target tile in the current visible area.
Optionally, the processing device 200 may further include a detection unit and a storage unit. Before the receiving unit 210 receives a service request of the user terminal 20, the detecting unit performs standardized detection on the received image-based vector data according to a preset detection rule; the storage unit is configured to store the normalized detected vector data as a meta file in the storage module 12 of the server 10.
Optionally, the determining unit 230 is further configured to determine whether a second coordinate system of a second coordinate set of a tile where the metafile is located is the same as a first coordinate system of the first coordinate set; and when the second coordinate system is different from the first coordinate system, converting the second coordinate set of the tile where the metafile is located into coordinates under the first coordinate system.
Optionally, the processing apparatus 200 may further include an adjusting unit, configured to perform an online adjusting operation on the target element metafile to be processed. Specifically, the rectification unit may be configured to perform an online rectification operation on the specified metafile for which the coordinate system determination is completed according to a received operation request for a specified element of the specified metafile, where the operation request is an online request.
Optionally, the sending unit 260 is further configured to send the target tile to the user terminal 20 in a specified image format corresponding to the service request.
In this embodiment, the processing module 11 may be an integrated circuit chip having signal processing capability. The processing module 11 may be a general-purpose processor. For example, the Processor may be a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), a Network Processor (NP), or the like; the method, the steps and the logic block diagram disclosed in the embodiments of the present Application may also be implemented or executed by a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component.
The memory module 12 may be, but is not limited to, a random access memory, a read only memory, a programmable read only memory, an erasable programmable read only memory, an electrically erasable programmable read only memory, and the like. In this embodiment, storage module 12 may be used to store metafiles, tiles, and the like. Of course, the storage module 12 may also be used to store a program, and the processing module 11 executes the program after receiving the execution instruction.
It should be noted that, as will be clear to those skilled in the art, for convenience and brevity of description, the specific working process of the server 10 described above may refer to the corresponding process of each step in the foregoing method, and will not be described in detail herein.
The embodiment of the application also provides a computer readable storage medium. The computer-readable storage medium has stored therein a computer program which, when run on a computer, causes the computer to execute the processing method as described in the above embodiments.
From the above description of the embodiments, it is clear to those skilled in the art that the present application can be implemented by hardware, or by software plus a necessary general hardware platform, and based on such understanding, the technical solution of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a usb disk, a removable hard disk, etc.), and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the method described in the embodiments of the present application.
In summary, in the present solution, the server renders only the target element metafile corresponding to the tile to be displayed in the current visible area of the user terminal, and does not need to render other element metafiles outside the current visible area, so as to reduce the computation workload. In addition, the target element metafile slices are converted into the tile areas to be displayed to obtain the target tiles, and then the target tiles are sent to the user terminal, so that all the element files do not need to be sliced to generate the tiles, and the processing pressure of the server vector slices is favorably reduced.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus, system, and method may be implemented in other ways. The apparatus, system, and method embodiments described above are illustrative only, as the flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (8)
1. A method for processing vector slices, the method comprising:
step S1, receiving a service request of a user terminal, wherein the service request carries a first coordinate set of tiles to be displayed in a current visible area of the user terminal;
step S2, reading a metafile corresponding to the service request from a storage module of a server into a memory of the server, and obtaining a vector element corresponding to the first coordinate set from the metafile as a target element metafile to be processed;
step S3, determining the target element metafile to be processed as the same coordinate system;
step S4, according to the received operation request aiming at the designated element of the designated metafile, the designated metafile which finishes the judgment of the coordinate system is subjected to online rectification operation, the operation request is an online request, and the designated element comprises a point, a line, a water body and a building;
step S5, rendering the image layer corresponding to the target element metafile according to the preset display condition in the service request;
step S6, converting the rendered image content slice of the target element metafile into an area corresponding to the tile to obtain a target tile;
step S7, sending the target tile to the user terminal, so that the user terminal displays the target tile in the current visual area;
wherein the operation request comprises one or more of the following requests:
a first request for adding a specified element in the specified metafile;
a second request for deleting a specified element in the specified metafile;
a third request for modifying a specified element in the specified metafile;
a fourth request for filtering specified elements in the specified metafile;
when the operation request comprises the first request, the performing online rectification operation on the specified metafile after the judgment of the coordinate system comprises:
requesting the designated metafile and acquiring metafile data;
adding the specified element to the specified metafile, and generating a metafile containing the specified element;
when the operation request comprises the second request, the performing online rectification operation on the specified metafile with the coordinate system judgment completed comprises:
requesting all metafiles where the specified elements are located and acquiring metafile data;
deleting the specified elements in the metafile data to generate metafiles with the deleted specified elements;
when the operation request comprises the third request, the performing online rectification operation on the specified metafile with the coordinate system judgment completed comprises:
requesting all metafiles where the specified elements are located and acquiring all tiles where the metafiles are located;
deleting the specified elements in all the tiles of the metafile to obtain a tile set with the specified elements deleted;
extracting the specified elements in all the tiles where the metafile is located, modifying the specified elements, and generating modified specified elements;
adding the modified specified element to the tile set from which the specified element is deleted;
when the operation request comprises the fourth request, the performing online rectification operation on the specified metafile after the judgment of the coordinate system is completed comprises:
requesting all metafiles where the specified elements are located and acquiring all tiles where the metafiles are located;
deleting the specified elements in all the tiles of the metafile to obtain a tile set with the specified elements deleted;
extracting specified elements in all tiles where the metafile is located, filtering and judging the specified elements in all the tiles where the metafile is located, and if the specified elements in the tiles are equal to the specified elements to be filtered, excluding the elements;
if the specified element in the tile is not equal to the specified element to be filtered, the element is reserved;
and adding the reserved elements to the tile set with the specified elements deleted.
2. The method according to claim 1, wherein before receiving a service request of a user terminal at step S1, and/or before sending the target tile to the user terminal at step S7, the method further comprises:
according to a preset detection rule, carrying out standardized detection on received vector data based on an image;
and storing the vector data subjected to standardization detection as a metafile into the storage module of the server.
3. The method of claim 2, wherein the preset detection rule comprises at least one of the following rules:
integrity detection rules for performing integrity detection on the vector data;
a logical consistency detection rule for performing logical consistency detection on the vector data;
a value range consistency detection rule for performing value range consistency detection on the vector data;
a format consistency detection rule for performing format consistency detection on the vector data;
a topology consistency detection rule for performing topology consistency detection on the vector data;
and the edge connection consistency detection rule is used for carrying out edge connection consistency detection on the vector data.
4. The method according to claim 1, wherein the step S3 determining the target element files to be processed as the same coordinate system comprises:
judging whether a second coordinate system of a second coordinate set of the tile where the metafile is located is the same as a first coordinate system of the first coordinate set;
and when the second coordinate system is different from the first coordinate system, converting the second coordinate set of the tile where the metafile is located into coordinates under the first coordinate system.
5. The method according to any of claims 1-4, wherein step S7 sending the target tile to the user terminal comprises:
and sending the target tile to the user terminal in a specified image format corresponding to the service request, wherein the specified image format comprises a plurality of different image formats.
6. An apparatus for processing vector slices, the apparatus comprising:
a receiving unit, configured to receive a service request of a user terminal, where the service request carries a first coordinate set of tiles to be displayed in a current visible area of the user terminal;
an obtaining unit, configured to read a metafile corresponding to the service request from a storage module of a server into a memory of the server, and obtain a vector element corresponding to the first coordinate set from the metafile as a target element metafile to be processed;
the determining unit is used for determining the target element metafiles to be processed to be in the same coordinate system;
the correction unit is used for performing online correction operation on the specified metafile after the judgment of the coordinate system is completed according to a received operation request aiming at the specified elements of the specified metafile, wherein the operation request is an online request, and the specified elements comprise points, lines, water bodies and buildings;
the rendering unit is used for rendering the image layer corresponding to the target element metafile according to a preset display condition in the service request;
the slice conversion unit is used for converting the rendered image content slice of the target element metafile into a region corresponding to the tile to obtain a target tile;
a sending unit, configured to send the target tile to the user terminal, so that the user terminal displays the target tile in the current visible area;
wherein the operation request comprises one or more of the following requests:
a first request for adding a specified element in the specified metafile;
a second request for deleting a specified element in the specified metafile;
a third request for modifying a specified element in the specified metafile;
a fourth request for filtering specified elements in the specified metafile;
when the operation request comprises the first request, the rectification unit is specifically used for requesting the specified metafile and acquiring metafile data; adding the specified element to the specified metafile, and generating a metafile containing the specified element;
when the operation request comprises the second request, the rectification unit is specifically used for requesting all metafiles where the specified elements are located and acquiring the metafile data; deleting the specified elements in the metafile data to generate metafiles with the deleted specified elements;
when the operation request includes the third request, the rectification unit is specifically configured to request all metafiles where the specified element is located and acquire all tiles where the metafiles are located; deleting the specified elements in all the tiles of the metafile to obtain a tile set with the specified elements deleted; extracting the specified elements in all the tiles where the metafile is located, modifying the specified elements, and generating modified specified elements; adding the modified specified element to the tile set from which the specified element is deleted;
when the operation request includes the fourth request, the rectification unit is specifically configured to request all metafiles where the specified element is located and acquire all tiles where the metafiles are located; deleting the specified elements in all the tiles of the metafile to obtain a tile set with the specified elements deleted; extracting specified elements in all tiles where the metafile is located, filtering and judging the specified elements in all the tiles where the metafile is located, and if the specified elements in the tiles are equal to the specified elements to be filtered, excluding the elements; if the specified element in the tile is not equal to the specified element to be filtered, the element is reserved; and adding the reserved elements to the tile set with the specified elements deleted.
7. A server, characterized in that the server comprises a processor and a memory coupled to each other, in which memory a computer program is stored which, when executed by the processor, causes the server to carry out the method according to any one of claims 1-5.
8. A computer-readable storage medium, in which a computer program is stored which, when run on a computer, causes the computer to carry out the method according to any one of claims 1-5.
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