CN114020755B - Image map tile publishing method, image map tile generating method and device - Google Patents
Image map tile publishing method, image map tile generating method and device Download PDFInfo
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Abstract
The application relates to the technical field of remote sensing image processing, in particular to an image map tile publishing method, an image map tile generating method and an image map tile generating device, wherein the publishing method comprises the following steps: analyzing time phase information of the remote sensing image data to be processed; updating a time axis list according to the time phase information; and updating the image superposition sequence according to the updated time axis list and the receiving time of the remote sensing image data. The generation method comprises the steps of obtaining a map tile request; determining first remote sensing image data according to comparison of the map tile request and the spatial index; determining second remote sensing image data from the first remote sensing image data according to the time phase information and the time axis list; sequencing the remote sensing images in the second remote sensing image data according to the time axis list and the superposition sequence; and displaying the tile image generated by the second remote sensing image data in a display area. The application is convenient for displaying and utilizing the new remote sensing image according to the time sequence.
Description
Technical Field
The present application relates to the field of remote sensing image processing technologies, and in particular, to a method for publishing an image map tile, a method for generating an image map tile, and an apparatus for generating an image map tile.
Background
In order to browse and apply the remote sensing images intuitively, tile map service is generally required to be issued, and for the same spatial region, the remote sensing images in multiple periods exist or a plurality of remote sensing images are overlapped. In order to check the situation of map service of multiple periods or multiple superposed images in the same spatial region in the related art, a new remote sensing image needs to be manually added into the service, and the remote sensing images need to be actively arranged in a time sequence.
Disclosure of Invention
In order to facilitate the utilization of new remote sensing images according to time sequence display, the application provides an image map tile issuing method, an image map tile generating method and an image map tile generating device.
In a first aspect of the application, an image map tile publishing method is provided, the method includes analyzing time phase information of remote sensing image data to be processed, wherein the time phase information is shooting time of a remote sensing image; updating a time axis list according to the time phase information, wherein the time axis list is a sequential list of the shooting time of the remote sensing image; and updating the image superposition sequence according to the updated time axis list and the receiving time of the remote sensing image data.
By adopting the technical scheme, after the map tile service is created, new remote sensing image data is automatically received, wherein the remote sensing image data comprises time phase information of the remote sensing image, and the time phase information is the shooting time of the remote sensing image, the remote sensing image data to be processed is analyzed to obtain the time phase information, the time axis list is updated according to the time phase information of the remote sensing image data to be processed, and then the image superposition sequence of the remote sensing image is updated according to the updated time axis list and the receiving time of the remote sensing image data, so that when the new remote sensing image data is received in time, the remote sensing image data is processed, the time axis is updated according to the shooting time, when the remote sensing image data is subsequently screened and displayed, the remote sensing image which accords with the time node is more conveniently screened out, and the time phase information and the receiving time of the remote sensing image data are combined, the display stacking sequence of the remote sensing images is updated, the remote sensing images containing time phase information are sorted according to time, newly received remote sensing image data without time phase information can be arranged on the uppermost layer according to the latest time phase by default, and for the remote sensing images in different regions containing the same time phase information, the remote sensing images are sequentially sorted in a small list at the same time according to the receiving time, so that the remote sensing images are displayed more flexibly, and the subsequent processing and utilization of the remote sensing image data are more convenient.
And further, storing the remote sensing image data, the time axis list and the image superposition sequence.
Further, a map tile service is created, and basic information of the map tile service is configured, the basic information including at least a slicing scheme.
Further, a spatial index is created for the remote sensing image data, wherein the spatial index at least comprises the tile level and the tile row and column number of the remote sensing image in the current slicing scheme.
And further, receiving a map tile request in real time, and determining that the remote sensing image meeting the conditions is displayed in a display area according to the map tile request, the spatial index and the time axis list.
In a second aspect of the present application, a method for generating image map tiles is provided, the method includes obtaining a map tile request, where the map tile request at least includes a tile level, a tile row number, a tile column number, and time phase information; determining first remote sensing image data according to the comparison of the tile levels, the tile row and column numbers and the spatial index; determining second remote sensing image data from the first remote sensing image data according to the time phase information and the time axis list; sequencing the remote sensing images in the second remote sensing image data according to the time axis list and the superposition sequence; and displaying the tile image generated by the second remote sensing image data in a display area.
By adopting the technical scheme, the map tile request at least comprises a map control which automatically calculates the corresponding tile level, a plurality of tile row and column numbers and the time node of the map to be displayed according to the scale and the geographic space range of the current screen when the map is browsed, the tile level and the tile row and column numbers are compared with the space index of all remote sensing image data associated in the map tile service to obtain first remote sensing image data, the remote sensing image in the first remote sensing image data is the remote sensing image data of the region range including or containing the map to be displayed, the remote sensing image which is in accordance with the time node to be displayed and before the time, namely the second remote sensing image data, is obtained from the first remote sensing image data according to time phase information, and the finally screened second remote sensing image data is generated into the tile image on the current screen, the remote sensing image generation method has the advantages that the images meeting the display requirements can be screened in the same map tile service through the display area for display, then the images are subjected to tile generation, all remote sensing images do not need to be subjected to service publishing and slicing, and the problems of time consumption and large publishing workload are reduced.
Further, displaying the second remote sensing image data generated tile image comprises displaying the second remote sensing image data generated tile image in a display area if the number of remote sensing images in the second remote sensing image data is one.
Further, the displaying the tile image generated by the second remote sensing image data further comprises judging whether the current-layer remote sensing image completely covers the display area based on the sequence of the remote sensing images in the second remote sensing image data if the number of the remote sensing images in the second remote sensing image data is multiple; if so, generating a tile image from the current-layer remote sensing image data in the second remote sensing image data for display; if not, sequentially overlapping the remote sensing images of the residual layers to the remote sensing image of the current layer according to the sequencing sequence of the remote sensing images until the overlapped image completely covers the display area, and generating the remote sensing image data overlapped in the second remote sensing image data into a tile image to be displayed in the display area.
In a third aspect of the present application, an image map tile publishing apparatus is further provided, where the apparatus includes an analyzing module, configured to analyze time phase information of remote sensing image data to be processed, where the time phase information is shooting time of a remote sensing image; the first updating module is used for updating a time axis list according to the time phase information, wherein the time axis list is a sequence list of the shooting time of the remote sensing image; and the second updating module is used for updating the image superposition sequence according to the updated time axis list and the receiving time of the remote sensing image data.
In a fourth aspect of the present application, a device for generating image map tiles is further provided, where the device includes an obtaining module, configured to obtain a map tile request, where the map tile request at least includes a tile level, a tile row number, a tile column number, and time phase information; a first determining module, configured to determine first remote sensing image data according to a comparison of the tile level, the tile row and column number, and the spatial index; the second determining module is used for determining second remote sensing image data from the first remote sensing image data according to the time phase information and the time axis list; the sorting module is used for sorting the remote sensing images in the second remote sensing image data according to the time axis list and the superposition sequence; and the display module is used for displaying the tile image generated by the second remote sensing image data in a display area.
Drawings
The above and other features, advantages and aspects of various embodiments of the present application will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, like or similar reference characters designate like or similar elements, and wherein:
fig. 1 shows a block diagram of an electronic device.
Fig. 2 is a flowchart illustrating a method for publishing image map tiles according to an embodiment of the present application.
Fig. 3 shows an exemplary diagram of a timeline list in an embodiment of the application.
Fig. 4 is a diagram illustrating an example of displaying an image superimposition order in an embodiment of the present application.
FIG. 5 is a flow chart illustrating the creation of a spatial index in an embodiment of the application.
FIG. 6 is a flow diagram that illustrates map tile service publication in an embodiment of an application.
Fig. 7 is a flowchart illustrating a tile generation method for video map in an embodiment of the present application.
Fig. 8 is a flow chart illustrating tile publishing and generation of a video map in an exemplary embodiment.
Fig. 9 is a schematic block diagram of an apparatus for publishing tiles of a video map according to an embodiment of the present application.
Fig. 10 is a schematic block diagram of an image map tile generating apparatus according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The development of the geographic information surveying and mapping industry in China makes a series of important breakthroughs, the capability of surveying and mapping technology equipment is remarkably improved, the updating speed of remote sensing image data is high, the volume of remote sensing image data is larger and larger, massive image data are generated by numerous satellite and photogrammetry technical means at present, tile map services need to be issued for visual online browsing and image achievement application, all image map tiles need to be sliced in advance by the traditional remote sensing image map service issuing technology, the slice data volume is large, and the consumed time is too long. In addition, for the same spatial region, there may be multiple periods of remote sensing images or multiple remote sensing images superimposed, in order to view such a same spatial region, multiple periods of multiple or multiple superimposed image map services, it is usually necessary to accurately select the required image data, to independently publish map services for each period (or a certain superimposed sequence), to form multiple different map services, to perform contrast browsing, etc., and especially to subsequently publish new multiple periods of multiple images and display associated service addresses. The requirement on the release is high, and the release workload is large.
Therefore, in order to solve the above-mentioned problems, the present application provides a method and a device for publishing tiles of an image map, a method and a device for generating tiles of an image map, which only need to publish remote sensing image data for multiple periods once, and support automatic (unattended) access publishing of new image data, when a map is browsed, a list of multiple time phases of time axes or layer stacking sequences is provided for users to freely and dynamically switch and adjust, after switching and adjusting, a tile generation mode is applied in real time, a map service instantly displays the effect of newly adjusted time phases and stacking sequences, and the method and the device have strong flexibility of application, and reduce workload of service publishing. And moreover, the tile can be released without pre-slicing, original image data required for generating the tile is quickly retrieved from massive images through space indexing according to information (level, line number and column number) requested by a single tile, then pixel values are calculated from the original images according to the range of the single tile and are filled into the tile, real-time generation of the tile is realized, and the problems of time consumption and disk space occupation of pre-slicing are solved.
Next, a system architecture according to an embodiment of the present application will be described. It should be noted that the system architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not constitute a limitation to the technical solution provided in the embodiment of the present application, and as a person having ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.
Fig. 1 shows a block diagram of an electronic device according to an embodiment of the present application.
Referring to fig. 1, an electronic device 100 includes a processor 101 and a memory 103. Wherein the processor 101 is coupled to the memory 103, such as via a bus 102. Optionally, the electronic device 100 may also include a transceiver 104. It should be noted that the transceiver 104 is not limited to one in practical application, and the structure of the electronic device 100 is not limited to the embodiment of the present application.
The Processor 101 may be a CPU (Central Processing Unit), a general-purpose Processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor 101 may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors.
The Memory 103 may be a ROM (Read Only Memory) or other type of static storage device that can store static information and instructions, a RAM (Random Access Memory) or other type of dynamic storage device that can store information and instructions, an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), a magnetic Disc storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to these.
The memory 103 is used for storing application program codes for executing the scheme of the application, and is controlled by the processor 101 to execute. The processor 101 is configured to execute application program code stored in the memory 103 to implement construction of a map or to control the vehicle to enter a parking space with a charging post and align a charging port of the vehicle with the charging post.
Among them, electronic devices include but are not limited to: mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and the like, and fixed terminals such as digital TVs, desktop computers, and the like. It should be noted that the electronic device shown in fig. 1 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present application.
Fig. 2 is a flowchart illustrating a method for publishing image map tiles according to an embodiment of the present application, as shown in fig. 2, the method includes:
step S201, analyzing time phase information of the remote sensing image data to be processed, wherein the time phase information is shooting time of the remote sensing image.
In the embodiment of the application, the remote sensing image data comprises basic information and metadata information of an image, the basic information comprises path, file size, pixel width and high-level information of a file of the remote sensing image, the metadata information comprises a coordinate system, a geographical range, time phase information and the like applied to the remote sensing image, wherein the time phase information refers to shooting time of the remote sensing image and can be accurate to the day. After being associated with new remote sensing image data, the map tile service analyzes the remote sensing image data to be processed, obtains time phase information in metadata information of the remote sensing image data, and uses the time phase information as subsequent processing of step S202.
In some embodiments, the map tile service receives the remote sensing image data in a plurality of ways, such as single receiving, batch receiving, folder receiving and the like, in the embodiment of the application, the map tile service is bound with the image storage folder on the server, an automatic monitoring task is set, the remote sensing image data change in the image storage folder is monitored, if new remote sensing image data are uploaded in the image storage folder, the image storage folder automatically adds new data to the map tile service for correlation of the remotely sensed image, wherein, the image storage folder can add new remote sensing image data to the map tile service in batch or add the new remote sensing image data to the map tile service singly, and the map tile service and the image storage folder are bound and monitored, the unattended automatic association of new remote sensing image data can be realized, and the workload of manpower is reduced.
And step S202, updating a time axis list according to the time phase information, wherein the time axis list is a sequence list of the shooting time of the remote sensing image.
In the embodiment of the present application, the map tile service will sequence the time phase information of all the associated remote sensing image data to form a time axis list, as shown in fig. 3, which is an exemplary diagram of the time axis list in the embodiment of the application, the time axis list may be a list of remote sensing image shooting times in order from near to far, or may be an inverse sequence list from far to near, and may be sequenced according to actual requirements in projects, in some embodiments of the application, there is a case that the time phase information of newly associated remote sensing image data is lost and cannot be obtained, and for this case, the time axis list is not updated; in other application embodiments, the time phase information of the newly associated remote sensing image data is the same as the time phase information of the associated remote sensing image data, but the shooting areas of the newly associated remote sensing image data and the associated remote sensing image data are different, and at this time, the updated time axis list is the same as the list before the update and is not changed. In the embodiment of the application, the time axis list is used as reference data of time axis display of a front-end browser display interface, a range covered by shooting time of all remote sensing images related to the map tile service can be displayed, a draggable control can be arranged on the display interface, and time information of the time axis list is displayed from left to right according to time from near to far.
And step S203, updating the image superposition sequence according to the updated time axis list and the receiving time of the remote sensing image data.
In this application embodiment, all remote sensing images associated with the map tile service are sorted, and used as an image stacking sequence for displaying in a display area of a front-end browser, and in some application embodiments, an image arrangement rule of the image stacking sequence may be: the remote sensing images are sequenced according to time by taking a time axis list as reference, if a plurality of remote sensing images exist in the same time phase and are different from a shooting area, the remote sensing images in the same time phase can be sequenced according to the time of receiving the remote sensing image data by a map tile service, if the condition that time phase information does not exist in the newly received remote sensing image data exists, the remote sensing image can be defaulted to be the latest remote sensing image in the current time phase, the remote sensing image is superposed on the uppermost layer, and when the new remote sensing image data is received subsequently, the image superposition sequence is continuously updated according to the mode.
In some application embodiments, as shown in fig. 4, the image stacking sequence is displayed in the display area of the browser, and the user may also adjust the front and back positions of the remote sensing image in the image stacking sequence according to his own needs, and display the remote sensing image in the display area according to the image stacking sequence.
In some application embodiments, before performing step S201, the method further includes creating a map tile service, and configuring basic information of the map tile service, where the basic information at least includes a slicing scheme.
The execution process of steps S201 to S203 is performed on the basis of the created map tile service, and before step S201, the map tile service needs to be created first, and basic information of the map tile service is configured, where the basic information at least includes a slicing scheme, in this embodiment, the slicing scheme at least includes a preset coordinate system and a tile matrix set, and in one example, the coordinate system may be selected as an EPSG: 4490 CGCS2000 latitude and longitude coordinate system, tile matrix set 1-22 levels. The basic information of the map tile service may further include information such as a service name, a home item, a rendering style, which is preset rendering information for a picture pixel value, and a level setting.
In some application embodiments, the method further comprises storing the remote sensing image data, the timeline list, and the image overlay order.
In further embodiments, the method further comprises creating a spatial index for the remotely sensed image data, the spatial index including at least a tile level, a tile row and column number of the remotely sensed image in the current slicing scheme.
The purpose of creating the spatial index for the remote sensing image data is to search and query the remote sensing image in a data query mode, so that the query speed can be improved. In an implementation manner, as shown in fig. 5, a flowchart of creating a spatial index in an application embodiment is shown, as shown in fig. 5, including:
step S501, obtaining slicing scheme information of the map tile service.
The slicing scheme information is obtained, namely, the coordinate system and the tile matrix set which are configured when the map tile service is created are obtained, and the information comprises the start point of coordinates, the size of a tile, the DPI of pixels, the level range, the resolution ratio scale of each level and the like.
And step S502, re-projecting the newly received remote sensing image data according to the coordinate system of the re-projection map tile service.
Because the newly received remote sensing image data and the created map tile service may not be in the same coordinate system, the remote sensing image data needs to be re-projected according to the coordinate system of the map tile service to establish a uniform spatial index for all the remote sensing image data.
In step S503, a spatial index of the remote sensing image data is calculated.
Traversing the tile matrix and each level according to the space range of the remote sensing image data after the re-projection and the information of the tile matrix set, and calculating the index information of the remote sensing image data at each level, wherein the index is a convenient retrieval mode of converting accurate space coordinates into row and column numbers and the like. The spatial index content here includes: the remote sensing image data has pixel width and height, pixel resolution (namely 1 pixel width and height represents the length and width of the actual geography), maximum and minimum column number, maximum and minimum row number and offset of the initial position of the upper left corner of the image in tile pixels at all levels in the map tile service.
Step S504, the spatial index information and the corresponding remote sensing image data are stored.
And after the spatial index is calculated, storing the remote sensing image data and the corresponding spatial index into a database together.
In some application embodiments, the method further comprises receiving a map tile request in real time, and determining that the remote sensing image meeting the conditions is displayed in a display area according to the map tile request, the spatial index and the time axis list.
After the map tile service is created and associated with remote sensing image data, a map tile request of a browser can be received, and remote sensing images meeting requirements are screened out in the map tile service through a space index and a time axis list according to the requirement for displaying the geographic area and the time requirement in the map tile request and displayed in a display area.
In some application embodiments, the complete process of map tile service creation publishing, as shown in FIG. 6, is a flow diagram of map tile service publishing in one application embodiment, as shown in FIG. 6, including,
step S601, a map tile service is created, and basic information of the map tile service is configured.
Step S602, the map tile service is bound with an image storage folder on the server, an automatic monitoring task is set, and remote sensing image data are automatically added.
Step S603, analyzing time phase information of the remote sensing image data to be processed, where the time phase information is shooting time of the remote sensing image.
And step S604, updating a time axis list according to the time phase information, wherein the time axis list is a sequence list of the shooting time of the remote sensing image.
And step S605, updating the image superposition sequence according to the updated time axis list and the receiving time of the remote sensing image data.
Step S606, a spatial index is created for the remote sensing image data, and the spatial index at least comprises the tile level and the tile row and column number of the remote sensing image in the current slicing scheme.
Step S607, storing the remote sensing image data, the spatial index, the time axis list, and the image superimposition order.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the described complete method for creating and publishing the map tile service may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.
Fig. 7 is a flowchart illustrating a tile generating method of image map according to an embodiment of the present invention, as shown in fig. 7, the method includes,
step S701, a map tile request is obtained, wherein the map tile request at least comprises tile levels, tile row and column numbers and time phase information.
In step S701, a map tile service that has been created is loaded on a map control of a browser, and the map control automatically calculates a corresponding tile level and a row and column number of a plurality of tiles according to a scale and a geographic space range in which the map is browsed on a current screen, and sends a request, in one example, a URL sample of the tile request is as follows.
This map tile request address contains the service name, slicing scheme, rendering style, and level, line number information (the request in the example, the tile at level 15, column 27132, row 5967), and phase information (2014-04-15).
In some application embodiments, after a map tile request is obtained, it may be first determined whether a tile cache exists, and if so, the Redis cache may be directly read, a tile may be generated, and the request may be returned.
Step S702, determining first remote sensing image data according to comparison of the tile level, the tile row and column number and the spatial index.
In step S702, according to the tile level and the tile row number in the map tile request, a remote sensing image meeting the condition in the geographic space range can be screened from the associated remote sensing image data through the spatial index, and is marked as first remote sensing image data, where the first remote sensing image data may include 1 and more than 1 remote sensing image.
And step S703, determining second remote sensing image data from the first remote sensing image data according to the time phase information and the time axis list.
In step S703, a time phase having the same time phase and being earlier than the date is determined from the time axis list according to the time phase information of the map tile request, and remote sensing image data conforming to the determined time phase information is re-selected from the first remote sensing image data according to the determined time phase information and is recorded as second remote sensing image data, where the second remote sensing image data is all remote sensing image data selected according to the conditions of the map tile request in the embodiment of the present application.
And step S704, sequencing the remote sensing images in the second remote sensing image data according to the time axis list and the superposition sequence.
In this embodiment of the application, the ordering rule for the second remote sensing image data may be: the remote sensing images are sorted by mainly using the image stacking sequence stored when the map tile service is created in the embodiment of the application and using a time axis list as reference, and if a plurality of remote sensing images exist in the same time phase and are different from a shooting area, the remote sensing images in the same time phase can be sorted in sequence according to the time for receiving the remote sensing image data by the map tile service.
Step S705 is to display the tile image generated from the second remote sensing image data in a display area.
In step S705, the second remote sensing image data is displayed in the display area in the sorted order of the remote sensing images.
In some application embodiments, if the number of the remote sensing images included in the second remote sensing image data is one, the second remote sensing image data is directly generated into a tile image to be displayed in the display area, specifically, in an example, the coordinate system of the second remote sensing image data is re-projected onto the coordinate system of the current map tile service, according to the map tile request of the 15 th level, 27132 th column and 5967 th line, the spatial index of the second remote sensing image data at the 15 th level is obtained, then according to the scaling factor, offset, pixel size and the like of the spatial index information, the pixel range to be read by the tile is calculated, then the real pixel is read, and according to the rendering style, the tile image is generated to be displayed in the display area of the browser.
In other application embodiments, the second remote sensing image data comprises a plurality of remote sensing images, and whether the current-layer remote sensing image completely covers the display area is judged based on the sequence of the remote sensing images in the second remote sensing image data; if so, generating a tile image from the current-layer remote sensing image data in the second remote sensing image data for display; if not, sequentially overlapping the remote sensing images of the residual layers to the remote sensing image of the current layer according to the sequencing sequence of the remote sensing images until the overlapped image completely covers the display area, and generating the remote sensing image data overlapped in the second remote sensing image data into a tile image to be displayed in the display area. In an implementation mode, according to the sequence of remote sensing images in the sorted second remote sensing image data, firstly generating temporary tiles for the first layer remote sensing image, judging whether the first layer remote sensing image covers the whole tile in the map tile request, if the first layer remote sensing image covers the whole tile, directly displaying tile pictures generated by the first layer remote sensing image in a display area of a browser, and not processing other remote sensing images; and if the map tile is completely covered, generating a temporary tile for the next layer of remote sensing image, judging whether the superposed image of the first layer of remote sensing image and the next layer of remote sensing image covers the whole tile in the map tile request, if not, continuously superposing the next layer of remote sensing image until the superposed image completely covers the whole tile in the map tile request, and finally superposing a plurality of temporary tiles into a tile image to be displayed in the display area.
In some application embodiments, the ordered list of the first remote sensing image data is displayed on a display interface, a user can adjust the display order of the remote sensing images according to needs, and when the tile images are produced in an overlapping mode, the remote sensing images are overlapped according to the new arrangement order.
Fig. 8 is a flowchart illustrating an exemplary process for tile publishing and generation of a video map, as shown in fig. 8, comprising,
step S801, analyzing time phase information of the remote sensing image data to be processed, wherein the time phase information is shooting time of the remote sensing image.
And step S802, updating a time axis list according to the time phase information, wherein the time axis list is a sequence list of the shooting time of the remote sensing image.
Step S803 is to update the image superimposition order based on the updated time axis list and the reception time of the remote sensing image data.
Step S804, obtaining a map tile request, wherein the map tile request at least comprises a tile level, a tile row number, a tile column number and time phase information.
Step S805, determining first remote sensing image data according to the comparison of the tile level, the tile row and column number and the spatial index.
And step S806, determining second remote sensing image data from the first remote sensing image data according to the time phase information and the time axis list.
And step S807, sorting the remote sensing images in the second remote sensing image data according to the time axis list and the superposition sequence.
And step S808, displaying the tile image generated by the second remote sensing image data in a display area.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the described complete method for creating and publishing the map tile service may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.
It should be noted that, for simplicity of description, the above-mentioned method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present application is not limited by the order of acts described, as some steps may occur in other orders or concurrently depending on the application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are exemplary embodiments and that the acts and modules referred to are not necessarily required in this application.
The above is a description of method embodiments, and the embodiments of the present application are further described below by way of apparatus embodiments.
Fig. 9 is a schematic block diagram of an apparatus for publishing tiles of a video map according to an embodiment of the present application, as shown in fig. 9, the apparatus comprising,
the analysis module 901 is configured to analyze time phase information of the remote sensing image data to be processed, where the time phase information is shooting time of the remote sensing image.
The first updating module 902 is configured to update a time axis list according to the time phase information, where the time axis list is a sequential list of shooting times of the remote sensing image.
And a second updating module 903, configured to update the image stacking sequence according to the updated time axis list and the receiving time of the remote sensing image data.
Fig. 10 is a schematic block diagram of an image map tile generating apparatus according to an embodiment of the present invention, as shown in fig. 10, the apparatus includes,
the obtaining module 1001 is configured to obtain a map tile request, where the map tile request at least includes a tile level, a tile row number, a tile column number, and time phase information.
A first determining module 1002, configured to determine first remote sensing image data according to a comparison of the tile level, the tile row and column number, and the spatial index.
And a second determining module 1003, configured to determine second remote sensing image data from the first remote sensing image data according to the time phase information and the time axis list.
And the sorting module 1004 is configured to sort the remote sensing images in the second remote sensing image data according to the time axis list and the stacking order.
A displaying module 1005, configured to display the tile image generated by the second remote sensing image data in a displaying area.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the described apparatus may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.
In the above embodiments, the implementation may be wholly or partly realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that includes one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., Digital Versatile Disk (DVD)), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others. It is noted that the computer-readable storage medium referred to in the embodiments of the present application may be a non-volatile storage medium, in other words, a non-transitory storage medium.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the application referred to in the present application is not limited to the embodiments with a particular combination of the above-mentioned features, but also encompasses other embodiments with any combination of the above-mentioned features or their equivalents without departing from the spirit of the application. For example, the above features may be replaced with (but not limited to) features having similar functions as those described in this application.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.
Claims (4)
1. A tile generating method for video map, comprising,
obtaining a map tile request, wherein the map tile request at least comprises a tile level, a tile row number, a tile column number and time phase information;
determining first remote sensing image data according to the comparison of the tile levels, the tile row and column numbers and the spatial index;
determining second remote sensing image data from the first remote sensing image data according to the time phase information and the time axis list;
sequencing the remote sensing images in the second remote sensing image data according to the time axis list and the superposition sequence;
and displaying the tile image generated by the second remote sensing image data in a display area.
2. The video map tile generation method of claim 1, wherein presenting said second remotely sensed video data generation tile image comprises,
and if the number of the remote sensing images in the second remote sensing image data is one, displaying the tile image generated by the second remote sensing image data in a display area.
3. The video map tile generation method of claim 1, wherein presenting said second remotely sensed video data generation tile image further comprises,
if the number of the remote sensing images in the second remote sensing image data is multiple, judging whether the current-layer remote sensing image completely covers the display area or not based on the sequence of the remote sensing images in the second remote sensing image data;
if so, generating a tile image from the current-layer remote sensing image data in the second remote sensing image data for display;
if not, sequentially overlapping the remote sensing images of the residual layers to the remote sensing image of the current layer according to the sequencing sequence of the remote sensing images until the overlapped image completely covers the display area, and generating the remote sensing image data overlapped in the second remote sensing image data into a tile image to be displayed in the display area.
4. An apparatus for tile generation of video map, comprising,
the map tile request at least comprises a tile level, a tile row number, a tile column number and time phase information;
the first determining module is used for determining first remote sensing image data according to the comparison among the tile levels, the tile row and column numbers and the spatial index;
the second determining module is used for determining second remote sensing image data from the first remote sensing image data according to the time phase information and the time axis list;
the sorting module is used for sorting the remote sensing images in the second remote sensing image data according to the time axis list and the superposition sequence;
and the display module is used for displaying the tile image generated by the second remote sensing image data in a display area.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102163214A (en) * | 2011-03-07 | 2011-08-24 | 北京百度网讯科技有限公司 | Numerical map generation device and method thereof |
| CN103065544A (en) * | 2012-12-19 | 2013-04-24 | 江苏省城市规划设计研究院 | Network map rectifying and drawing method under dynamic map projection |
| EP2626668A1 (en) * | 2012-02-09 | 2013-08-14 | HERE Global B.V. | Testing of a map database update |
| CN105045930A (en) * | 2015-08-31 | 2015-11-11 | 武汉云空间地理信息技术有限公司 | Raster data slice generating method and raster data slice generating system |
| CN105069020A (en) * | 2015-07-14 | 2015-11-18 | 国家信息中心 | 3D visualization method and system of natural resource data |
| US10382890B1 (en) * | 2018-07-26 | 2019-08-13 | Bluedot Innovation Pty Ltd | Cacheable geographic pages |
| CN113094601A (en) * | 2021-03-01 | 2021-07-09 | 云南省地矿测绘院 | GIS cloud management method and system |
| CN113254553A (en) * | 2021-04-14 | 2021-08-13 | 湖北省地质调查院 | Web map publishing method and system based on intelligent agent platform |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10002156B2 (en) * | 2015-03-16 | 2018-06-19 | Here Global B.V. | Version management for incrementally compiled map data |
-
2022
- 2022-01-06 CN CN202210007773.7A patent/CN114020755B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102163214A (en) * | 2011-03-07 | 2011-08-24 | 北京百度网讯科技有限公司 | Numerical map generation device and method thereof |
| EP2626668A1 (en) * | 2012-02-09 | 2013-08-14 | HERE Global B.V. | Testing of a map database update |
| CN103065544A (en) * | 2012-12-19 | 2013-04-24 | 江苏省城市规划设计研究院 | Network map rectifying and drawing method under dynamic map projection |
| CN105069020A (en) * | 2015-07-14 | 2015-11-18 | 国家信息中心 | 3D visualization method and system of natural resource data |
| CN105045930A (en) * | 2015-08-31 | 2015-11-11 | 武汉云空间地理信息技术有限公司 | Raster data slice generating method and raster data slice generating system |
| US10382890B1 (en) * | 2018-07-26 | 2019-08-13 | Bluedot Innovation Pty Ltd | Cacheable geographic pages |
| CN113094601A (en) * | 2021-03-01 | 2021-07-09 | 云南省地矿测绘院 | GIS cloud management method and system |
| CN113254553A (en) * | 2021-04-14 | 2021-08-13 | 湖北省地质调查院 | Web map publishing method and system based on intelligent agent platform |
Non-Patent Citations (2)
| Title |
|---|
| "MASHUP SCHEME DESIGN OF MAP TILES USING LIGHTWEIGHT OPEN SOURCE WEBGIS PLATFORM";Taoying Hu等;《The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences》;20180510;第565-571页 * |
| "地理空间数据一体化更新发布系统的技术研究";卫东;《测绘通报》;20130731;第77-81页 * |
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