CN107451150B - Geographic data presentation method and device - Google Patents
Geographic data presentation method and device Download PDFInfo
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- CN107451150B CN107451150B CN201610375635.9A CN201610375635A CN107451150B CN 107451150 B CN107451150 B CN 107451150B CN 201610375635 A CN201610375635 A CN 201610375635A CN 107451150 B CN107451150 B CN 107451150B
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/95—Retrieval from the web
- G06F16/953—Querying, e.g. by the use of web search engines
- G06F16/9537—Spatial or temporal dependent retrieval, e.g. spatiotemporal queries
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/29—Geographical information databases
Abstract
The invention provides a method and a device for presenting geographic data, wherein the method comprises the following steps: determining longitude and latitude information of geographic data to be presented; writing the geographic data into a preset number of tile sub-packages according to the longitude and latitude information and tile division rules in a map with a preset grade; the map with the preset level comprises a preset number of tiles, and each tile corresponds to one tile sub-packet; and when the grade of the map to be displayed is lower than the preset grade, respectively selecting partial data in the tile sub-packets with preset quantity to be displayed on the map to be displayed. By the method and the device, the problem of data presentation of the GIS in big data analysis in the related technology is solved.
Description
Technical Field
The invention relates to the field of geographic information, in particular to a method and a device for presenting geographic data.
Background
At present, a plurality of operators enter a state of simultaneously operating a plurality of networks, the 2G/3G/4G network is in a normal state when simultaneously operating, how to effectively manage the plurality of networks, guidance is provided for network development by using data of the plurality of networks, a large data value is mined for the operators, the maximization of a network value is realized, and the method becomes a work of key consideration of the operators.
Operators begin to collect various data in communication networks, build big data analysis platforms, want to expand the application of data in new fields, data in mobile communication networks have wide application in the aspects of advertisement, public safety, personal finance and the like, and big data analysis systems can support the development of the new applications.
A Geographic Information System (GIS), for example, a Web GIS, is an important component of a big data analysis System, and is responsible for processing and presenting Geographic Information data generated by network communication, so as to provide a reference for network planning and optimization of an operator by presenting more intuitive and clear data. WebGIS mainstream processing schemes in the related art use open source frameworks Geoserver + Postgresql/Postgis + OpenLayers. Geosever: publishing map data, configuring data storage, configuring style files, pre-slicing pictures, allowing a user to perform updating, deleting, inserting operations and the like on feature data. Postgresql/Postgis database: and storing the vector layer to be displayed and related attribute information data, supporting dynamic modification of the attribute data, providing geographic information data storage for the Geoserver layer and the like. OpenLayers: adding, deleting, managing and presenting layers at the front end of the Web, and the like. For large data analysis systems, the raster layers that need to be preprocessed per day may be hundreds or thousands, if the raster data volume per layer is on the order of tens of millions. Processing 1 million records in the architecture of the Geoserver + Postgresql/Postgis database takes approximately 35 minutes, with 15 minutes of slicing time, and if not, front-end rendering is nearly impossible to complete quickly for large data volumes of layers. Thus, it is substantially impossible to use this architecture to accomplish hundreds or thousands of raster layer pre-processes in a relatively short amount of time. In addition, the processing mode has relatively high requirement on the capacity of the hard disk, because each layer of the image layer needs to be sliced, the occupied space is about 10 times of the size of the original file, a single million grids are basically more than 2G, the data of one year is stored, and the hard disk space is huge. In the aspect of stability, the architecture mode of Geoserver + Postgresql is the most popular mode at present, but in the aspect of stability, especially for a large number of tables and a large number of layers, the layers can only adopt a first-level directory to store all information, and huge difficulties and unknown risks are brought for maintaining backup. In summary, GIS components using the Geoserver + Postgresql architecture are unable to support the data processing requirements of large data analytics systems.
In view of the above problems in the related art, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a method and a device for presenting geographic data, which are used for at least solving the problem of data presentation of a GIS in big data analysis in the related technology.
According to an embodiment of the present invention, there is provided a geographic data presentation method including: determining longitude and latitude information of geographic data to be presented; writing the geographic data into a preset number of tile sub-packages according to the longitude and latitude information and tile division rules in a map with a preset grade; the map with the preset level comprises the preset number of tiles, and one tile corresponds to one tile sub-package; and when the grade of the map to be displayed is lower than the preset grade, respectively selecting partial data in the tile sub-packages of the preset number to be displayed on the map to be displayed.
Optionally, after determining the grade of the map to be displayed, the method further comprises: when the grade of the map to be displayed is determined to be higher than or equal to the preset grade, all data in the tile sub-package corresponding to the tiles included in the map to be displayed are presented on the map to be displayed, wherein the tile division rule in the map to be displayed with the grade higher than the preset grade is the same as the tile division rule in the map with the preset grade.
Optionally, writing the geographic data into the predetermined number of tile sub-packages according to the longitude and latitude information and the tile division rule in the map of the predetermined level includes: determining all tiles corresponding to the geographic data according to the longitude and latitude information; judging whether all the tiles correspond to the tile sub-package; if the judgment result is negative, creating a tile sub-packet for the tile which does not correspond to the tile sub-packet; writing the geographic data into a corresponding tile sub-package.
Optionally, when it is determined that the level of the map to be displayed is lower than the predetermined level, respectively selecting part of data in the predetermined number of tile sub-packets to be presented on the map to be displayed, including: converting the longitude and latitude information of the geographic data into pixel points in tiles included by the map to be displayed, and writing the pixel points into the tiles included by the map to be displayed; selecting one geographic data from more than two geographic data as data to be presented for pixel points corresponding to more than two geographic data; and as for the pixel point only corresponding to one geographic data, selecting the geographic data corresponding to the pixel point as data to be presented; and presenting the data to be presented on the map to be displayed.
Optionally, writing the pixel point into a tile included in the map to be displayed includes: judging whether the pixel points exist in tiles included in the map to be displayed or not; under the condition that the judgment result is that the map exists, covering the pixel points existing in the tiles included in the map to be displayed by using the pixel points; and/or writing the pixel points into tiles included in the map to be displayed under the condition that the judgment result is that the pixel points do not exist.
Optionally, the position coordinates of the pixel point in the tile include: x = (gridX-tileinx)/pixW, y = (tileMaxY-gridY)/pixH; wherein gridX and gridY are respectively longitude and latitude of the geographic data, tilMinX and tilMaxY are respectively minimum longitude and maximum latitude of the tile, and pixW and pixH are actual sizes of the pixel points.
Optionally, determining the level of the map to be displayed comprises: receiving a request message; determining the map to be displayed according to the tile information carried in the request message; and determining the grade of the map to be displayed according to the grade information carried in the request message.
According to an embodiment of the present invention, there is provided a geographic data presentation device including: the determining module is used for determining longitude and latitude information of the geographic data to be presented; the writing module is used for writing the geographic data into a preset number of tile sub-packages according to the longitude and latitude information and tile division rules in a map with a preset grade; the map with the preset level comprises the preset number of tiles, and one tile corresponds to one tile sub-package; and the presentation module is used for determining the grade of the map to be displayed, and respectively selecting part of data in the tile sub-packets with the preset number to be presented on the map to be displayed when the grade of the map to be displayed is lower than the preset grade.
Optionally, the presentation module is further configured to perform the following: after determining the grade of the map to be displayed and when determining that the grade of the map to be displayed is higher than or equal to the preset grade, all data in tile sub-packets corresponding to tiles included in the map to be displayed are presented on the map to be displayed, wherein tile division rules in the map to be displayed with the grade higher than the preset grade are the same as the tile division rules in the map with the preset grade.
Optionally, the writing module includes: the first determining unit is used for determining all tiles corresponding to the geographic data according to the longitude and latitude information; the judging unit is used for judging whether all the tiles correspond to the tile sub-package; the creating unit is used for creating a tile sub-packet for the tile which does not correspond to the tile sub-packet under the condition that the judgment result of the judging unit is negative; a writing unit for writing the geographic data into corresponding tile sub-packets.
Optionally, the presentation module comprises: the conversion unit is used for converting the longitude and latitude information of the geographic data into pixel points in tiles included by the map to be displayed and writing the pixel points into the tiles included by the map to be displayed; the selecting unit is used for selecting one geographic data from more than two geographic data as data to be presented for the pixel points corresponding to more than two geographic data; as for the pixel point corresponding to only one geographic data, selecting the geographic data corresponding to the pixel point as data to be presented; and the presentation unit is used for presenting the data to be presented on the map to be displayed.
Optionally, when the pixel point is written into a tile included in the map to be displayed, the conversion unit includes: the judging subunit is used for judging whether the pixel points exist in the tiles included in the map to be displayed; the processing subunit is used for covering the pixel points existing in the tiles included in the map to be displayed by using the pixel points under the condition that the judgment result of the judging subunit is that the pixel points exist; and/or writing the pixel points into tiles included in the map to be displayed under the condition that the judgment result is that the pixel points do not exist.
Optionally, the position coordinates of the pixel point in the tile include: x = (gridX-tileinx)/pixW, y = (tileMaxY-gridY)/pixH; wherein gridX and gridY are respectively longitude and latitude of the geographic data, tilMinX and tileMaxY are respectively minimum longitude and maximum latitude of the tile, and pixW and pixH are actual sizes of the pixel points.
Optionally, when determining the grade of the map to be displayed, the presenting module includes: a receiving unit configured to receive a request message; a second determining unit, configured to determine the map to be displayed according to the tile information carried in the request message; and the third determining unit is used for determining the grade of the map to be displayed according to the grade information carried in the request message.
According to another embodiment of the present invention, there is also provided a terminal including the apparatus of any one of the above.
According to still another embodiment of the present invention, there is also provided a storage medium. The storage medium is configured to store program code for performing the following steps described above.
According to the invention, only partial geographic data is displayed on the map with a lower level, so that the complete map to be displayed can be rapidly displayed when the map is displayed, and the problem of data presentation of the GIS in big data analysis in the related technology is effectively solved, thereby improving the user experience.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a block diagram of a hardware structure of a mobile terminal of a geographic data presentation method according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method of geographic data presentation according to an embodiment of the present invention;
FIG. 3 is a flow chart of a process for geographic data according to an embodiment of the invention;
FIG. 4 is a graph comparing processing efficiency according to embodiments of the invention;
FIG. 5 is a block diagram of a geographic data presentation device according to an embodiment of the present invention;
FIG. 6 is a block diagram of the structure of the write module 64 in the geographic data presentation device according to an embodiment of the present invention;
FIG. 7 is a block diagram I of the structure of the presentation module 66 in the geographic data presentation device according to the embodiment of the present invention;
fig. 8 is a block diagram of the structure of the conversion unit 82 in the geographic data presentation device according to the embodiment of the present invention;
fig. 9 is a block diagram ii of the structure of the presentation module 66 in the geographic data presentation device according to the embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The method provided by the embodiment of the application can be executed in a mobile terminal, a computer terminal or a similar operation device. Taking the mobile terminal as an example, fig. 1 is a block diagram of a hardware structure of the mobile terminal according to an embodiment of the present invention. As shown in fig. 1, the mobile terminal 10 may include one or more (only one shown in fig. 1) processors 102 (the processor 102 may include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory 104 for storing data, and a transmitting device 106 for communication functions. It will be understood by those skilled in the art that the structure shown in fig. 1 is only an illustration and is not intended to limit the structure of the electronic device. For example, the mobile terminal 10 may also include more or fewer components than shown in FIG. 1, or have a different configuration than shown in FIG. 1.
The memory 104 may be used to store software programs and modules of application software, such as program instructions/modules corresponding to the geographic data presentation method in the embodiment of the present invention, and the processor 102 executes various functional applications and data processing by running the software programs and modules stored in the memory 104, so as to implement the method described above. The memory 104 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory located remotely from the processor 102, which may be connected to the mobile terminal 10 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission device 106 is used for receiving or transmitting data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the mobile terminal 10. In one example, the transmission device 106 includes a Network adapter (NIC), which can be connected to other Network devices through a base station so as to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module, which is used for communicating with the internet in a wireless manner.
In this embodiment, a geographic data presenting method operating in the mobile terminal is provided, and fig. 2 is a flowchart of the geographic data presenting method according to the embodiment of the present invention, as shown in fig. 2, the flowchart includes the following steps:
step S202, determining longitude and latitude information of geographic data to be presented;
step S204, writing the geographic data into a preset number of tile sub-packages according to the longitude and latitude information and a tile division rule in a map with a preset grade; the map with the preset level comprises a preset number of tiles, and one tile corresponds to one tile sub-package;
step S206, determining the grade of the map to be displayed, and when the grade of the map to be displayed is determined to be lower than the preset grade, respectively selecting partial data in the tile sub-packages with preset quantity to be displayed on the map to be displayed.
Wherein, it may be the terminal that performs the above-mentioned operations. The ranking of the map may be determined according to the zoom of the map, for example, the larger the map is reduced (for example, maps of respective countries can be displayed), the lower the ranking of the representative map is, the larger the map is enlarged (for example, maps of respective provinces of china can be displayed), and the higher the ranking of the representative map is.
Through the steps, only partial geographic data are displayed on the map with the lower level, so that the complete map to be displayed can be rapidly displayed when the map is displayed, the problem of data presentation of the GIS in big data analysis in the related technology is effectively solved, and the user experience is improved.
In an optional embodiment, after determining the grade of the map to be displayed, the method further includes: and when the grade of the map to be displayed is determined to be higher than or equal to the preset grade, all data in the tile sub-package corresponding to the tiles included in the map to be displayed are presented on the map to be displayed, wherein the tile division rule in the map to be displayed with the grade higher than the preset grade is the same as the tile division rule in the map with the preset grade. In this embodiment, in a map with a higher rank, the geographic area range that can be displayed in the display area is smaller (for example, only the geographic range in beijing city can be displayed), so when data is presented, data in tile sub-packets corresponding to tiles included in the current display area can be all displayed, and data that needs to be displayed is relatively small, so the display speed of the map is not affected.
In an optional embodiment, writing the geographic data into a predetermined number of tile sub-packets according to the latitude and longitude information and a tile division rule in a map of a predetermined level includes: determining all tiles corresponding to the geographic data according to the longitude and latitude information; judging whether all the tiles correspond to the tile sub-package; under the condition that the judgment result is negative, a tile sub-package is established for the tiles which do not correspond to the tile sub-package; and writing the geographic data into the corresponding tile sub-packets. In this embodiment, all geographic data may be divided according to latitude and longitude information of the geographic data, and written into a tile sub-packet corresponding to a tile in a predetermined level (for example, level 10), where when writing the geographic data, all tiles in the predetermined level may be traversed first, whether a tile sub-packet already exists under each tile is determined, if not, the tile sub-packet is created, and the geographic data to be written into the tile sub-packet is written into the tile sub-packet. Optionally, after the geographic data is written into the tile sub-packets, the range size represented by the current geographic data layer may be recorded, so as to lay a foundation for subsequent map display of other levels.
In an optional embodiment, when it is determined that the level of the map to be displayed is lower than the predetermined level, selecting a part of data in a predetermined number of tile sub-packets to be presented on the map to be displayed respectively includes: converting the longitude and latitude information of the geographic data into pixel points in tiles included by the map to be displayed and writing the pixel points into the tiles included by the map to be displayed; selecting one geographic data from more than two geographic data as data to be presented for pixel points corresponding to more than two geographic data; and as for the pixel point only corresponding to one geographic data, selecting the geographic data corresponding to the pixel point as data to be presented; and presenting the data to be presented on the map to be displayed. In this embodiment, in order to improve tile drawing efficiency and reduce data storage space, it is not necessary to present all geographic data of the same pixel point on the map to be displayed with a lower level, only one geographic data may be taken for drawing, and other geographic data may be searched from the tile sub-packets.
In an optional embodiment, writing the pixel point into a tile included in a map to be displayed includes: judging whether the pixel points exist in tiles included in the map to be displayed; under the condition that the judgment result is that the map exists, covering the pixel points existing in the tiles included in the map to be displayed by using the pixel points; and/or writing the pixel points into tiles included in the map to be displayed under the condition that the judgment result is that the pixel points do not exist.
In an optional embodiment, the position coordinates of the pixel points in the tile include: x = (gridX-tileinx)/pixW, y = (tileMaxY-gridY)/pixH; wherein gridX and gridY are respectively longitude and latitude of the geographic data, tileMinX and tileMaxY are respectively minimum longitude and maximum latitude of the tile, and pixW and pixH are actual sizes of the pixel points. In this embodiment, the actual size of the pixel represents the actual size represented by one pixel, and one pixel may be a square, and when the pixel is a square small square, the pixW and the pixH are the same, and when the pixel is a rectangular small square, the pixW and the pixH represent the actual lengths of two edges of the pixel, respectively.
In an alternative embodiment, determining the rank of the map to be displayed comprises: receiving a request message; determining the map to be displayed according to the tile information carried in the request message; and determining the grade of the map to be displayed according to the grade information carried in the request message. In this embodiment, when a request message of a front end is received, a map may be presented according to the request message, where the request message may carry requested level information and tile information, where the tile information may be a number of a tile.
As can be seen from the foregoing embodiments, the processing method of massive geographic information data according to the present invention is characterized by "divide and conquer, and draw on demand". That is, the entire data is divided in tile units at a certain map display level (e.g., level 10) according to the map tile rule. Drawing only the tile data in the current visible layer range in each request, and converting the tile data into longitude and latitude representation through data file reading; dividing data into a plurality of tile data sub-packets according to a tile division rule of a certain map level (such as 10 th level), and writing the data into a file; performing visual point extraction on the geographic information data (namely extracting the geographic information data for displaying on a map) at the level (0-10) below 10, and generating a tile file; and reading the tile file or the data sub-package file for drawing according to the level of the front-end request and the tile information, and returning the drawn tile file or the data sub-package file to the front end for presentation, so that the processing of massive geographic data is realized.
The geographical data presentation of the embodiments of the present invention is described below with reference to specific embodiments:
detailed description of the preferred embodiment 1
In the present embodiment, the method of the present invention is described by taking communication grid geographic data (in the following description, the communication grid geographic data may also be referred to as "grid data" or "grid") as an example, and as shown in fig. 3, the present embodiment includes the following implementation steps:
11. reading raster data according to the input raster data, and converting the raster data into latitude and longitude representations (corresponding to step 1 in fig. 3);
12. the data is divided into a plurality of data sub-packets (corresponding to tile sub-packets) according to the tile rule of a certain map level (n level) (corresponding to the predetermined level described above) (corresponding to step 2 in fig. 3).
Optionally, all the raster data is traversed, and for each raster the following is performed:
12.1, calculating the numbers xmax, ymax, xmin and ymin of the maximum and minimum tiles spanned by the grid;
and 12.2, traversing all the tiles spanned by the grid, judging whether the tiles exist in the tile sub-packets, if so, adding the grid into the tile sub-packets, otherwise, newly building a sub-packet of the tiles, and adding the grid into the sub-packet.
For the generated tile sub-package, data can be written into corresponding files (namely, the tile sub-package) respectively, and the range size represented by the current raster data layer is recorded;
13. for the levels below the n level (i.e., the levels smaller than n), each pixel may correspond to multiple grids, and in order to improve tile drawing efficiency and reduce data storage space, it is not necessary to store all grids corresponding to the same pixel point when the levels are low, so that only one grid position information is stored for drawing for the grids at the same pixel point position, and the acquisition of other attribute information of the grids can be searched from the data sub-package generated in step 12, and a corresponding tile file is generated for each tile. The following operations may be performed for each of the levels below the n-level (corresponding to step 3 in fig. 3):
13.1, acquiring the maximum and minimum tile numbers at the level according to the grid layer range obtained in the step 12;
13.2, traversing all tiles according to the maximum and minimum tile numbers, acquiring the grids in the tile range from the data sub-packets obtained in the step 12, converting the grid longitude and latitude information into pixel points in the tiles in order to further improve the tile drawing efficiency and reduce the data storage space, judging whether the pixel points exist in the tiles, covering if the pixel points exist in the tiles, adding the pixel points into the tiles if the pixel points do not exist, and calculating the pixel points of the grids in the tiles as follows:
x＝(gridX-tileMinX)/pixW
y＝(tileMaxY-gridY)/pixH
where gridX and gridY are grid latitudes and longitudes, tileinx and tileMaxY are minimum longitudes and maximum latitudes of the current tile, which may both be expressed in monte coordinates, and pixW and pixH are distances (i.e., actual sizes) that each pixel within the current tile represents on the map.
And 13.3, writing the acquired grid pixel point information into the tile file.
14. Reading the tile file or the data sub-package file for drawing according to the level and the tile number requested by the front end, and returning to the front end for presentation:
if the request level is n-level or below n-level, directly drawing by using the generated 0-n-level tile pixel point data;
if the request level is above n levels, the tile number of the tile at the nth level is calculated, the tile sub-package data of the corresponding nth level is read, and the grid in the sub-package file is converted into the screen position in the tile for drawing (corresponding to step 4 in fig. 3).
By the geographic data processing method, massive geographic information data can be stably and efficiently processed. The method in the embodiment of the invention can disperse the drawing time into each request, thereby saving the slicing time required by a Geoserver mode; in addition, compared with the warehousing time of a processing mode of Geoserver + Postgresql, the data of the method in the embodiment of the invention is stored in a file, only 0-n levels of visual point data are added on the basis of an original data file, the occupied storage space is greatly reduced, and the data processing time is mainly the time for writing the subpackage file. Therefore, the method in the embodiment of the invention can rapidly draw the map layer by adding the cache mechanism, the occupied amount of the storage space is basically equivalent to the size of the original geographic data file, and the processing efficiency is greatly improved. In actual data processing, under the same environment, when 10 concurrent threads are simultaneously processed, about 50 grid data processing times of 2000 ten thousand are about 32 minutes. A specific processing efficiency comparison can be made with reference to fig. 4. Moreover, by using the method in the embodiment of the method, the current processing requirement can be met only by one server for processing provincial geographic data, and the hardware cost is greatly saved.
Specific example 2
The user can visualize communication data by using the method on a GIS under a 900913 coordinate system, and an operator can display the distribution condition of the communication data on the geography through the GIS to perform network regulation and optimization.
Step 21: and (4) data extraction and conversion, wherein geographic data in the communication data and data to be displayed are used as input.
Step 22: generating 10-level tile sub-packet data, traversing all data records, dividing the data into individual tile sub-packets according to the 10 th level under a 900913 coordinate system, calculating the numbers of the tiles where the data records are located, and storing the data records into the tile sub-packets to which the data records belong. The tile number calculation method is as follows:
X＝(mercatorX+20037508.3427892)/(res[10]*tileWidth)
Y＝(20037508.3427892–mercatorY)/(res[10]*tileHeight)
wherein mercatorX and mercatorY represent coordinate points with Monte coordinates, res [10] is the resolution of 10 th level in 900913 coordinate system, and tilWidth and tilHeight are the width and height of the tile.
Step 23: generating tile data of 0-10 levels, acquiring the maximum and minimum latitude and longitude range of data where a data record is located from tile sub-package data for the tiles of 0-10 levels, respectively calculating the maximum and minimum tile numbers of 0-10 levels, reading the tile sub-package as shown in step 22, and calculating the pixel point position of the data record in the tile, wherein the calculation method comprises the following steps:
x＝(X-tileMinX)/pixW
y＝(tileMaxY-Y)/pixH
wherein X (corresponding to gridX) and Y (corresponding to gridY Y) are longitude and latitude of communication data, the minimum longitude and the maximum latitude of the tileinx and tileMaxY current tiles are both expressed in monte coordinates, and pixW and pixH are actual distances of each pixel in the current tile in the grade of i (0 < = i < = 10) on the 900913 coordinate system. Each pixel point can only store one piece of geographic data information, and the pixel point data is written into a tile file (x _ y _ level) named by a tile number (x, y) and a level (level) for storage.
Step 24: drawing, according to the serial number of the front end request tile, for the 0-10 level, obtaining the corresponding data from the tile data generated in the step 23, and directly drawing the tile and returning the tile to the front end. For level 10 or more, find the tile subpackage data drawing tile corresponding to the requested tile number from the tile subpackage data generated in step 22. The tile sub-package which is requested is cached in the memory by using a method which is not used for the longest time, and the next request is obtained from the memory, so that the drawing efficiency is improved.
Specific example 3
The user can visualize the communication data on the GIS under the hundred-degree coordinate system, and the operator can display the distribution condition of the communication data on the geography through the GIS to perform network regulation and network optimization.
Step 31: and (4) extracting and converting data, and taking geographic data in the communication data and data to be displayed as input.
Step 32: generating 10-level tile sub-package data, traversing all data records, dividing the data into individual tile sub-packages according to the 10 th level under a Baidu map coordinate system, calculating the tile numbers of the data records, and storing the data records into the tile sub-packages to which the data records belong. The tile number calculation method is as follows:
X＝(mercatorX+20037508.3427892)/(res[10]*tileWidth)
Y＝(mercatorY+20037508.3427892)/(res[10]*tileHeight)
wherein mercatorX and mercatorY represent coordinate points with Monte coordinates, res [10] is the resolution of 10 level in a Baidu map coordinate system, and tileWidth and tileHeight are the width and height of the tile.
Step 33: generating tile data of 0-10 levels, acquiring the maximum and minimum latitude and longitude range of data where a data record is located from tile sub-package data for the tiles of 0-10 levels, respectively calculating the maximum and minimum tile numbers of 0-10 levels, reading the tile sub-package as shown in step 32, and calculating the pixel point position of the data record in the tile, wherein the calculation method comprises the following steps:
x＝(X-tileMinX)/pixW
y＝(tileMaxY-Y)/pixH
wherein, X and Y are longitude and latitude of communication data, the minimum longitude and the maximum latitude of the tileMinX and tileMaxY current tiles are both expressed by Monte coordinates, and pixW and pixH are actual distances of each pixel in the current tile in the level of i (0 < = i < = 10) on a hundred-degree map coordinate system. And only one piece of geographic data information is stored in each pixel point, and pixel point data is written into a tile file (x _ y _ level) named by a tile number (x, y) and a level (level) for storage.
Step 34: drawing, according to the serial number of the front end request tile, for the 0-10 level, obtaining the corresponding data from the tile data generated in the step 33, directly drawing the tile and returning the tile to the front end. For level 10 or more, find the tile subpackage data drawing tile corresponding to the requested tile number from the tile subpackage data generated in step 32. The tile sub-package which is requested is cached in the memory by using a method which is not used for the longest time, and the next request is obtained from the memory, so that the drawing efficiency is improved.
Specific example 4
A user visualizes the environmental data on a GIS map by using the method in the embodiment of the invention, and the environmental data is presented through a GIS. And observing and analyzing pollution conditions of various places to guide environmental remediation and protection.
Step 41: and (4) data extraction and conversion, wherein geographic data in the environment data and data needing to be displayed are used as input.
Step 42: generating 8-level tile sub-packet data, traversing all data records, dividing the data into individual tile sub-packets according to the 8 th level under a 900913 coordinate system, calculating the tile numbers of the data records, and storing the data records into the tile sub-packets to which the data records belong. The tile number calculation method is as follows:
X＝(mercatorX+20037508.3427892)/(res[8]*tileWidth)
Y＝(20037508.3427892–mercatorY)/(res[8]*tileHeight)
wherein mercatorX and mercatorY represent Monte coordinates representing coordinate points, res [10] is the resolution of the 8 th level in a 900913 coordinate system, and tileWidth and tileHeight are the width and height of the tile.
Step 43: generating tile data of 0-8 levels, acquiring the maximum and minimum latitude and longitude range of data where a data record is located from tile sub-package data for the tiles of 0-8 levels, respectively calculating the maximum and minimum tile numbers of 0-8 levels, reading the tile sub-package as shown in step 42, and calculating the pixel point position of the data record in the tile, wherein the calculation method comprises the following steps:
x＝(X-tileMinX)/pixW
y＝(tileMaxY-Y)/pixH
where X and Y are longitude and latitude of the environment data, tileinx and minimum longitude and maximum latitude of the tileMaxY current tile are both expressed in monte coordinates, and pixW and pixH are actual distances of each pixel in the current tile expressed in the level of i (0 < = i < = 8) on the 900913 coordinate system. Only one piece of geographic data information is stored in each pixel point, and the pixel point data is written into a tile file (x _ y _ level) named by a tile number (x, y) and a level (level) for storage.
Step 44: drawing, according to the serial number of the front end request tile, for the 0-8 level, obtaining the corresponding data from the tile data generated in the step 43, and directly drawing the tile and returning the tile to the front end. For level 8 or above, find the tile sub-package data drawing tile corresponding to the requested tile number from the tile sub-package data generated in step 42. And caching the requested tile sub-packets into the memory by using a method which is not used for the longest time, and acquiring the next request from the memory, thereby improving the drawing efficiency.
Specific example 5
The user visualizes the climate data on the GIS map by using the method. And displaying the climate data information on the GIS to observe the cloud cover, the distribution of rainfall and the climate change condition.
Step 51: and (4) data extraction and conversion, wherein geographic data in the climate data and data needing to be displayed are used as input.
Step 52: generating 10-level tile sub-packet data, traversing all data records, dividing the data into individual tile sub-packets according to the 10 th level under a 900913 coordinate system, calculating the tile numbers of the data records, and storing the data records into the tile sub-packets to which the data records belong. The tile number calculation method is as follows:
X＝(mercatorX+20037508.3427892)/(res[10]*tileWidth)
Y＝(20037508.3427892–mercatorY)/(res[10]*tileHeight)
wherein mercatorX and mercatorY represent coordinate points with Monte coordinates, res [10] is the resolution of 10 th level in 900913 coordinate system, and tilWidth and tilHeight are the width and height of the tile.
Step 53: generating tile data of 0-10 levels, acquiring the maximum and minimum latitude and longitude range of data where a data record is located from tile sub-package data for the tiles of 0-10 levels, respectively calculating the maximum and minimum tile numbers of 0-10 levels, reading the tile sub-package as shown in step 52, and calculating the pixel point position of the data record in the tile, wherein the calculation method comprises the following steps:
x＝(X-tileMinX)/pixW
y＝(tileMaxY-Y)/pixH
wherein, X and Y are latitude and longitude of the climate data, the minimum longitude and maximum latitude of the tileinx and tileMaxY current tiles are both expressed by monte coordinates, and pixW and pixH are actual distances of each pixel in the current tile on the level of i (0 < = i < = 10) on the 900913 coordinate system. And only one piece of geographic data information is stored in each pixel point, and pixel point data is written into a tile file (x _ y _ level) named by a tile number (x, y) and a level (level) for storage.
Step 54: drawing, according to the serial number of the front end request tile, for the 0-10 level, obtaining the corresponding data from the tile data generated in the step 53, and directly drawing the tile and returning the tile to the front end. For level 10 or more, find the tile sub-package data drawing tile corresponding to the requested tile number from the tile sub-package data generated in step 52. And caching the requested tile sub-packets into the memory by using a method which is not used for the longest time, and acquiring the next request from the memory, thereby improving the drawing efficiency.
Through the description of the foregoing embodiments, it is clear to those skilled in the art that the method according to the foregoing embodiments may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but the former is a better implementation mode in many cases. Based on such understanding, the technical solutions of the present invention or portions thereof contributing to the prior art may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (which may be a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
In this embodiment, a geographic data presenting device is further provided, and the device is used to implement the foregoing embodiments and preferred embodiments, and the description of which has been already made is omitted. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
Fig. 5 is a block diagram of a geographic data presentation apparatus according to an embodiment of the present invention, and as shown in fig. 5, the apparatus includes a determination module 52, a writing module 54, and a presentation module 56, and the apparatus is explained as follows:
a determining module 52, configured to determine latitude and longitude information of the geographic data to be presented; a writing module 54, connected to the determining module 52, for writing the geographic data into a predetermined number of tile sub-packages according to the longitude and latitude information and a tile division rule in a map of a predetermined level; the map with the preset level comprises the tiles with the preset number, and each tile corresponds to one tile sub-packet; and a presentation module 56, connected to the writing module 54, configured to determine a level of the map to be displayed, and select a part of data in the tile sub-packets of a predetermined number to be presented on the map to be displayed when it is determined that the level of the map to be displayed is lower than the predetermined level.
In an alternative embodiment, the presenting module 56 is further configured to perform the following processes: and after determining the grade of the map to be displayed and when determining that the grade of the map to be displayed is higher than or equal to the preset grade, presenting all data in the tile sub-package corresponding to the tiles included in the map to be displayed on the map to be displayed, wherein the tile division rule in the map to be displayed with the grade higher than the preset grade is the same as the tile division rule in the map with the preset grade.
Fig. 6 is a block diagram of a structure of a writing module 54 in the geographic data presentation device according to an embodiment of the present invention, and as shown in fig. 6, the writing module 54 includes a first determining unit 62, a judging unit 64, a creating unit 66, and a writing unit 68, and the writing module 54 is explained as follows:
a first determining unit 62, configured to determine all tiles corresponding to the geographic data according to the latitude and longitude information; a determining unit 64, connected to the first determining unit 62, for determining whether all the tiles correspond to the tile sub-package; a creating unit 66, connected to the judging unit 64, for creating a tile sub-packet for a tile not corresponding to the tile sub-packet if the judging result of the judging unit 64 is negative; a writing unit 68, connected to the creating unit 66, for writing the geographic data into the corresponding tile sub-package.
Fig. 7 is a first block diagram of the structure of the presentation module 56 in the geographic data presentation device according to the embodiment of the present invention, as shown in fig. 7, the presentation module 56 includes a conversion unit 72, a selection unit 74 and a presentation unit 76, and the following description is provided for the presentation module 56:
the conversion unit 72 is configured to convert the longitude and latitude information of the geographic data into pixel points in tiles included in a map to be displayed, and write the pixel points into the tiles included in the map to be displayed; a selecting unit 74, connected to the converting unit 72, configured to select, for a pixel corresponding to more than two geographic data, one geographic data from the more than two geographic data as data to be presented; and for the pixel point only corresponding to one geographic data, selecting the geographic data corresponding to the pixel point as data to be presented; and a presentation unit 76 connected to the selection unit 74 for presenting the data to be presented on the map to be displayed.
Fig. 8 is a block diagram of a conversion unit 72 in the geographic data presentation device according to an embodiment of the present invention, and as shown in fig. 8, the conversion unit 72 includes a judgment sub-unit 82 and a processing sub-unit 84, and the following describes the conversion unit 72:
a determining subunit 82, configured to determine, when a pixel point is written into a tile included in a map to be displayed, whether the pixel point exists in the tile included in the map to be displayed; a processing subunit 84, connected to the determining subunit 82, configured to, if the determination result of the determining subunit 82 is that there is a tile in the map to be displayed, cover a pixel existing in the tile with the pixel; and/or writing the pixel points into tiles included in the map to be displayed under the condition that the judgment result is that the pixel points do not exist.
In an optional embodiment, the position coordinates of the pixel points in the tile include: x = (gridX-tileinx)/pixW, y = (tileMaxY-gridY)/pixH; wherein gridX and gridY are respectively longitude and latitude of the geographic data, tileinx and tileMaxY are respectively minimum longitude and maximum latitude of the tile, and pixW and pixH are actual sizes of the pixel points.
Fig. 9 is a block diagram of a second structure of the presenting module 56 in the geographic data presenting apparatus according to the embodiment of the invention, and as shown in fig. 9, the presenting module 56 includes a receiving unit 92, a second determining unit 94, and a third determining unit 96, and the presenting module 56 is explained below.
A receiving unit 92, configured to receive a request message when determining a level of a map to be displayed; a second determining unit 94, connected to the receiving unit 92, for determining the map to be displayed according to the tile information carried in the request message; and a third determining unit 96, connected to the second determining unit 94, for determining the level of the map to be displayed according to the level information carried in the request message.
In an alternative embodiment, a terminal is further provided, and the terminal may include any one of the geographic data presentation devices in fig. 5 to 9.
It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in different processors in any combination.
The embodiment of the invention also provides a storage medium. Alternatively, in the present embodiment, the storage medium may be configured to store program codes for executing the steps in the above method embodiments.
Optionally, in this embodiment, the storage medium may include but is not limited to: various media capable of storing program codes, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
Optionally, in this embodiment, the processor executes the above steps according to program codes stored in the storage medium.
Optionally, for a specific example in this embodiment, reference may be made to the examples described in the above embodiment and optional implementation, and this embodiment is not described herein again.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized in a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a memory device and executed by a computing device, and in some cases, the steps shown or described may be executed out of order, or separately as individual integrated circuit modules, or multiple modules or steps thereof may be implemented as a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (15)
1. A method of geographic data presentation, comprising:
determining longitude and latitude information of geographic data to be presented;
writing the geographic data into a preset number of tile sub-packets according to the longitude and latitude information and a tile division rule in a map with a preset grade; the map with the preset level comprises the preset number of tiles, and one tile corresponds to one tile sub-package;
and when the grade of the map to be displayed is lower than the preset grade, respectively selecting partial data in the tile sub-packages of the preset number to be displayed on the map to be displayed.
2. The method of claim 1, wherein after determining the ranking of the map to be displayed, the method further comprises:
when the grade of the map to be displayed is determined to be higher than or equal to the preset grade, all data in the tile sub-packets corresponding to the tiles included in the map to be displayed are presented on the map to be displayed, wherein the tile dividing rule in the map to be displayed with the grade higher than the preset grade is the same as the tile dividing rule in the map with the preset grade.
3. The method of claim 1, wherein writing the geographic data into the predetermined number of tile packets according to the longitude and latitude information and tile division rules in the predetermined level of map comprises:
determining all tiles corresponding to the geographic data according to the longitude and latitude information;
judging whether all the tiles correspond to tile sub-packages or not;
under the condition that the judgment result is negative, a tile sub-package is established for the tiles which do not correspond to the tile sub-package;
writing the geographic data into a corresponding tile sub-package.
4. The method of claim 1, wherein when the level of the map to be displayed is determined to be lower than the predetermined level, selecting a part of data in the predetermined number of tile sub-packets to be presented on the map to be displayed respectively comprises:
converting the longitude and latitude information of the geographic data into pixel points in tiles included by the map to be displayed, and writing the pixel points into the tiles included by the map to be displayed;
selecting one geographic data from more than two geographic data as data to be presented for pixel points corresponding to more than two geographic data; and as for the pixel point only corresponding to one geographic data, selecting the geographic data corresponding to the pixel point as data to be presented;
and presenting the data to be presented on the map to be displayed.
5. The method of claim 4, wherein writing the pixel points into a tile included in the map to be displayed comprises:
judging whether the pixel points exist in tiles included in the map to be displayed or not;
under the condition that the judgment result is that the map exists, covering the pixel points existing in the tiles included in the map to be displayed by using the pixel points; and/or the presence of a gas in the atmosphere,
and writing the pixel points into tiles included by the map to be displayed under the condition that the judgment result is that the pixel points do not exist.
6. The method according to claim 4 or 5, wherein the coordinates of the location of the pixel points within the tile comprise:
x＝(gridX-tileMinX)/pixW，
y＝(tileMaxY-gridY)/pixH；
wherein gridX and gridY are respectively longitude and latitude of the geographic data, tilMinX and tilMaxY are respectively minimum longitude and maximum latitude of the tile, and pixW and pixH are actual sizes of the pixel points.
7. The method of claim 1, wherein determining the level of the map to be displayed comprises:
receiving a request message;
determining the map to be displayed according to the tile information carried in the request message; and the number of the first and second groups,
and determining the grade of the map to be displayed according to the grade information carried in the request message.
8. A geographic data presentation device, comprising:
the determining module is used for determining longitude and latitude information of the geographic data to be presented;
the writing module is used for writing the geographic data into a preset number of tile sub-packages according to the longitude and latitude information and tile division rules in a map with a preset grade; the map with the preset level comprises the preset number of tiles, and one tile corresponds to one tile sub-package;
and the presentation module is used for determining the grade of the map to be displayed and respectively selecting partial data in the tile sub-packets with the preset number to be presented on the map to be displayed when the grade of the map to be displayed is determined to be lower than the preset grade.
9. The apparatus of claim 8, wherein the presentation module is further configured to: after determining the grade of the map to be displayed and when determining that the grade of the map to be displayed is higher than or equal to the preset grade, all data in tile sub-packets corresponding to tiles included in the map to be displayed are presented on the map to be displayed, wherein tile division rules in the map to be displayed with the grade higher than the preset grade are the same as the tile division rules in the map with the preset grade.
10. The apparatus of claim 8, wherein the write module comprises:
the first determining unit is used for determining all tiles corresponding to the geographic data according to the longitude and latitude information;
the judging unit is used for judging whether all the tiles correspond to the tile sub-package;
the creating unit is used for creating a tile sub-packet for the tile which does not correspond to the tile sub-packet under the condition that the judgment result of the judging unit is negative;
a writing unit for writing the geographic data into corresponding tile sub-packets.
11. The apparatus of claim 8, wherein the presentation module comprises:
the conversion unit is used for converting the longitude and latitude information of the geographic data into pixel points in tiles included by the map to be displayed and writing the pixel points into the tiles included by the map to be displayed;
the selecting unit is used for selecting one geographic data from more than two geographic data as data to be presented for the pixel points corresponding to more than two geographic data; and as for the pixel point only corresponding to one geographic data, selecting the geographic data corresponding to the pixel point as data to be presented;
and the presentation unit is used for presenting the data to be presented on the map to be displayed.
12. The apparatus according to claim 11, wherein when writing the pixel points into tiles included in the map to be displayed, the conversion unit includes:
the judging subunit is used for judging whether the pixel points exist in the tiles included in the map to be displayed;
the processing subunit is used for covering the pixel points existing in the tiles included in the map to be displayed by using the pixel points under the condition that the judgment result of the judging subunit is that the pixel points exist; and/or writing the pixel points into tiles included by the map to be displayed under the condition that the judgment result is that the pixel points do not exist.
13. The apparatus according to claim 11 or 12, wherein the coordinates of the location of the pixel points within the tile comprise:
x＝(gridX-tileMinX)/pixW，
y＝(tileMaxY-gridY)/pixH；
wherein gridX and gridY are respectively longitude and latitude of the geographic data, tilMinX and tileMaxY are respectively minimum longitude and maximum latitude of the tile, and pixW and pixH are actual sizes of the pixel points.
14. The apparatus of claim 8, wherein in determining the level of the map to be displayed, the presentation module comprises:
a receiving unit configured to receive a request message;
a second determining unit, configured to determine the map to be displayed according to the tile information carried in the request message; and the number of the first and second groups,
and the third determining unit is used for determining the grade of the map to be displayed according to the grade information carried in the request message.
15. A terminal, characterized in that it comprises the apparatus of any one of claims 8 to 14.
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| CN111914042B (en) * | 2019-05-10 | 2024-03-19 | 中国电力科学研究院有限公司 | Method for processing vector and grid slice data in power GIS |
| CN110740160B (en) * | 2019-08-29 | 2022-08-05 | 武汉烽火众智数字技术有限责任公司 | Multi-source data map gridding and data state real-time pushing system |
| CN110602235B (en) * | 2019-09-23 | 2022-08-23 | 北京中农信达信息技术有限公司 | PB-level remote sensing image data service publishing and slicing method |
| CN110795096A (en) * | 2019-10-15 | 2020-02-14 | 紫光云(南京)数字技术有限公司 | Slice layer special effect realization method based on openlayers |
| CN111078814B (en) * | 2019-12-10 | 2023-06-20 | 孝感科先电力工程咨询设计有限责任公司 | Map drawing method based on tile map |
| CN111611538B (en) * | 2020-04-02 | 2023-06-20 | 广东邦鑫数据科技股份有限公司 | Water depth measurement result display system, method, device and storage medium |
| CN111611334A (en) * | 2020-04-24 | 2020-09-01 | 国家电网有限公司 | Power grid geographic information system fusing multi-source information |
| CN112035588B (en) * | 2020-08-31 | 2021-05-25 | 北京市测绘设计研究院 | Method for constructing spatial data rule base engine and GIS data quality inspection method |
| CN115061989B (en) * | 2022-06-07 | 2023-04-18 | 云南省地矿测绘院有限公司 | GIS data sharing method and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005094466A2 (en) * | 2004-03-23 | 2005-10-13 | Google Inc. | Generating and serving tiles in a digital mapping system |
| WO2007043246A1 (en) * | 2005-10-11 | 2007-04-19 | Cad Center Corporation | Ground image display system |
| CN102819530A (en) * | 2011-06-10 | 2012-12-12 | 中兴通讯股份有限公司 | Method and device for displaying electronic map |
| CN103718000A (en) * | 2011-05-19 | 2014-04-09 | Sk普兰尼特有限公司 | Real-time map data updating system and method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8937627B1 (en) * | 2012-03-28 | 2015-01-20 | Google Inc. | Seamless vector map tiles across multiple zoom levels |
| US20130332476A1 (en) * | 2012-06-08 | 2013-12-12 | Apple Inc. | Vector road network simplification |
| WO2015195923A1 (en) * | 2014-06-21 | 2015-12-23 | Google Inc. | Tile-based distribution of searchable geospatial data to client devices |
| CN105447064B (en) * | 2014-09-30 | 2021-02-05 | 阿里巴巴（中国）有限公司 | Electronic map data making and using method and device |
-
2016
- 2016-05-30 CN CN201610375635.9A patent/CN107451150B/en active Active
- 2016-12-16 WO PCT/CN2016/110416 patent/WO2017206484A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005094466A2 (en) * | 2004-03-23 | 2005-10-13 | Google Inc. | Generating and serving tiles in a digital mapping system |
| WO2007043246A1 (en) * | 2005-10-11 | 2007-04-19 | Cad Center Corporation | Ground image display system |
| CN103718000A (en) * | 2011-05-19 | 2014-04-09 | Sk普兰尼特有限公司 | Real-time map data updating system and method |
| CN102819530A (en) * | 2011-06-10 | 2012-12-12 | 中兴通讯股份有限公司 | Method and device for displaying electronic map |
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