CN107451150A - Geodata rendering method and device - Google Patents
Geodata rendering method and device Download PDFInfo
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- CN107451150A CN107451150A CN201610375635.9A CN201610375635A CN107451150A CN 107451150 A CN107451150 A CN 107451150A CN 201610375635 A CN201610375635 A CN 201610375635A CN 107451150 A CN107451150 A CN 107451150A
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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
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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
- G06F16/90—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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- 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 kind of geodata rendering method and device, wherein, this method includes：Determine the latitude and longitude information of geodata to be presented；According to the tile division rule in the map of above-mentioned latitude and longitude information and predetermined grade, above-mentioned geodata is write in the tile subpackage of predetermined quantity；Wherein, the map of the predetermined grade includes the tile of predetermined quantity, the corresponding tile subpackage of a tile；The grade of map to be shown is determined, and, when it is determined that the grade of above-mentioned map to be shown is less than above-mentioned predetermined grade, the partial data chosen respectively in the tile subpackage of predetermined quantity is presented on above-mentioned map to be shown.By the present invention, problem is presented in the data for solving GIS in the analysis of big data present in correlation technique.
Description
Technical field
The present invention relates to area of geographic information, in particular to a kind of geodata rendering method and device.
Background technology
Many operators have been introduced into multiple networks operation state simultaneously at present, and 2G/3G/4G networks are run simultaneously to be turned into
How multiple networks are effectively managed by normality, and guidance is provided for network Development using the data of multiple networks, are operator
Big data value is excavated, realizes that network value maximizes, turns into the work that operator's emphasis considers.
Operator starts to collect the various data in communication network, establishes big data analysis platform, wants to expand data new
The application in field, the data in mobile communications network have wide purposes in advertisement, public safety, personal finance etc., greatly
Data analysis system can support the exploitation of these new opplications.
GIS-Geographic Information System (Geographic Information System, referred to as GIS) (for example, Web GIS) is made
For the important component in big data analysis system, carry processing and geographic information data caused by network communication is presented
Task, it is rendered as operator with apparent data more directly perceived and the network planning and optimization offer reference is provided.In correlation technique
WebGIS main flows processing scheme uses Open Framework Geoserver+Postgresql/Postgis+OpenLayers.
Geosever：Issue map datum, configuration data storage, configuration style file, picture pre-cut sheets, it is allowed to which user is to characteristic
It is updated, deletes, insertion operation etc..Postgresql/Postgis databases：Preserve the VectorLayer for needing to show and phase
Data of attribute information is closed, supports dynamic modification attribute data, geographic information data storage etc. is provided for Geoserver figure layers.
OpenLayers：The figure layer addition of web front end, is deleted, management and presentation etc..It is required daily for big data analysis system
The raster map layer of pretreatment may be hundreds and thousands of, if each figure layer raster data amount is in ten million rank.With Geoserver+
The framework mode of Postgresql/Postgis databases, 1,000 ten thousand records are handled, are taken around 35 minutes, wherein 15 minutes
The section time, if do not cut into slices, for the figure layer of big data quantity, front end presents and hardly possible quickly completed.So, use
The framework has needed hundreds of raster map layer pretreatment substantially impossible within a short period of time.In addition, the processing mode,
Requirement to hard-disk capacity is relatively high, and due to needing that each level of figure layer is cut into slices, the space of occupancy is about original
10 times of sizes of file, single ten million grid in more than 2G, preserve the data of 1 year, it is necessary to which hard drive space is huge substantially.
In terms of stability, Geoserver+Postgresql framework mode is the mode of current most main flow, but in terms of stability, it is special
It is not to face substantial amounts of table, substantial amounts of figure layer, it can only use the catalogue of one-level to go to preserve all information, standby for safeguarding
Part, all bring huge difficulty and control unknown risks.In a word, can not using the GIS components of Geoserver+Postgresql frameworks
Enough support the data handling requirements of big data analysis system.
For above mentioned problem present in correlation technique, effective solution is not suggested that still at present.
The content of the invention
The embodiments of the invention provide a kind of geodata rendering method and device, at least to solve to exist in correlation technique
Big data analysis in GIS data present problem.
According to one embodiment of present invention, there is provided a kind of geodata rendering method, including：Determine ground to be presented
Manage the latitude and longitude information of data；According to the tile division rule in the map of the latitude and longitude information and predetermined grade, by described in
In the tile subpackage of geodata write-in predetermined quantity；Wherein, the map of the predetermined grade includes the predetermined quantity
Tile, the corresponding tile subpackage of a tile；The grade of map to be shown is determined, and, it is determined that the map to be shown
Grade when being less than the predetermined grade, the partial data chosen respectively in the tile subpackage of the predetermined quantity is waited to show described
Presented on pictorial map.
Alternatively, it is determined that after the grade of the map to be shown, methods described also includes：It is determined that described to be shown
When the grade of map is greater than or equal to the predetermined grade, it is presented what the map to be shown included on the map to be shown
All data in tile subpackage corresponding to tile, wherein, the grade is higher than watt in the show map of the predetermined grade
Piece division rule is identical with the tile division rule in the map of the predetermined grade.
Alternatively, according to the tile division rule in the map of the latitude and longitude information and the predetermined grade by described
The tile subpackage that reason data write the predetermined quantity includes：Determine that the geodata is corresponding according to the latitude and longitude information
Whole tiles；Judge whether whole tiles are corresponding with tile subpackage；It is not right in the case where judged result is no
The tile that should have tile subpackage creates tile subpackage；By in tile subpackage corresponding to geodata write-in.
Alternatively, when it is determined that the grade of the map to be shown is less than the predetermined grade, choose respectively described predetermined
Partial data in the tile subpackage of quantity is presented on the map to be shown, including：By the warp of the geodata
Latitude information is converted into the pixel in the tile that the map to be shown includes, and pixel write-in is described to be shown
In the tile that map includes；For the pixel of corresponding two or more geodata, selected from described two above geodatas
A geodata is taken as data to be presented；And for only corresponding to the pixel of a geodata, choose the pixel
Geodata is as data to be presented corresponding to point；The data to be presented are presented on the map to be shown.
Alternatively, the pixel is write in the tile that the map to be shown includes includes：Judge described to be shown
It whether there is the pixel in the tile that map includes；In the presence of judged result is, covered using the pixel
Cover existing pixel in the tile that the map to be shown includes；And/or judged result be in the absence of in the case of, will
The pixel is write in the tile that the map to be shown includes.
Alternatively, position coordinates of the pixel in the tile includes：X=(gridX-tileMinX)/pixW,
Y=(tileMaxY-gridY)/pixH；Wherein, gridX, gridY are respectively the longitude and latitude of the geodata,
TileMinX, tileMaxY are respectively the minimum longitude of the tile and maximum latitude, and pixW and pixH are the pixel
Actual size.
Optionally it is determined that the grade of map to be shown includes：Receive request message；According to what is carried in the request message
Tile information determines the map to be shown；And wait to show according to determining the class information carried in the request message
The grade of pictorial map.
According to one embodiment of present invention, there is provided device is presented in a kind of geodata, including：Determining module, it is used for
Determine the latitude and longitude information of geodata to be presented；Writing module, for according to the latitude and longitude information and predetermined grade
Tile division rule in map, the geodata is write in the tile subpackage of predetermined quantity；Wherein, the predetermined grade
Map include the tile of the predetermined quantity, the corresponding tile subpackage of a tile；Module is presented, for determining to wait to show
The grade of pictorial map, and, when it is determined that the grade of the map to be shown is less than the predetermined grade, choose respectively described pre-
Partial data in the tile subpackage of fixed number amount is presented on the map to be shown.
Alternatively, the presentation module is additionally operable to perform following processing：It is determined that after the grade of the map to be shown,
And when determining that the grade of the map to be shown be greater than or equal to the predetermined grade, on the map to be shown described in presentation
All data in tile subpackage corresponding to the tile that map to be shown includes, wherein, the grade is higher than the predetermined grade
Show map in tile division rule it is identical with the tile division rule in the map of the predetermined grade.
Alternatively, said write module includes：First determining unit, it is described for being determined according to the latitude and longitude information
Manage whole tiles corresponding to data；Judging unit, for judging whether whole tiles are corresponding with tile subpackage；Create single
Member, it is that the tile for not being corresponding with tile subpackage creates tile in the case of being no in the judged result of the judging unit
Subpackage；Writing unit, for by tile subpackage corresponding to geodata write-in.
Alternatively, the presentation module includes：Converting unit, for the latitude and longitude information of the geodata to be converted into
The pixel in tile that the map to be shown includes, and the tile that the pixel write-in map to be shown is included
It is interior；Unit is chosen, for the pixel for corresponding two or more geodata, is chosen from described two above geodatas
One geodata is as data to be presented；And for only corresponding to the pixel of a geodata, choose the pixel
Corresponding geodata is as data to be presented；Display unit, for the number to be presented to be presented on the map to be shown
According to.
When alternatively, in the tile for including the pixel write-in map to be shown, the converting unit bag
Include：Judgment sub-unit, it whether there is the pixel in the tile included for judging the map to be shown；Processing is single
Member, in the presence of being in the judged result of the judgment sub-unit, covered using the pixel described to be shown
Existing pixel in the tile that map includes；And/or judged result be in the absence of in the case of, the pixel is write
Enter in the tile that the map to be shown includes.
Alternatively, position coordinates of the pixel in the tile includes：X=(gridX-tileMinX)/pixW,
Y=(tileMaxY-gridY)/pixH；Wherein, gridX, gridY are respectively the longitude and latitude of the geodata,
TileMinX, tileMaxY are respectively the minimum longitude of the tile and maximum latitude, and pixW and pixH are the pixel
Actual size.
Alternatively, it is determined that map to be shown grade when, it is described presentation module include：Receiving unit, please for receiving
Seek message；Second determining unit, for determining the map to be shown according to the tile information carried in the request message；With
And the 3rd determining unit, for determining the grade of the map to be shown according to the class information carried in the request message.
According to another embodiment of the invention, a kind of terminal is additionally provided, the terminal is included described in any of the above-described
Device.
According to still another embodiment of the invention, a kind of storage medium is additionally provided.The storage medium is arranged to storage and used
In the program code for performing following above-mentioned steps.
By the present invention, due in rank lower ground only display portion geodata on figure, it is ensured that carrying out ground
When figure is presented, complete map to be shown can be quickly showed, effectively solves the analysis of big data present in correlation technique
Problem is presented in middle GIS data, so as to improve Consumer's Experience.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is a kind of hardware block diagram of the mobile terminal of geodata rendering method according to embodiments of the present invention；
Fig. 2 is the flow chart of geodata rendering method according to embodiments of the present invention；
Fig. 3 is the tile division schematic diagram of the rank of map the 1st according to embodiments of the present invention；
Fig. 4 is the process chart of geodata according to embodiments of the present invention；
Fig. 5 is treatment effeciency comparison diagram according to embodiments of the present invention；
Fig. 6 is the structured flowchart that device is presented in geodata according to embodiments of the present invention；
Fig. 7 is the structured flowchart that writing module 64 in device is presented in geodata according to embodiments of the present invention；
Fig. 8 is that the structured flowchart one that module 66 is presented in device is presented in geodata according to embodiments of the present invention；
Fig. 9 is the structured flowchart that converting unit 82 in device is presented in geodata according to embodiments of the present invention；
Figure 10 is that the structured flowchart two that module 66 is presented in device is presented in geodata according to embodiments of the present invention.
Embodiment
Describe the present invention in detail below with reference to accompanying drawing and in conjunction with the embodiments.It should be noted that do not conflicting
In the case of, the feature in embodiment and embodiment in the application can be mutually combined.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, "
Two " etc. be for distinguishing similar object, without for describing specific order or precedence.
The embodiment of the method that the embodiment of the present application is provided can be in mobile terminal, terminal or similar computing
Performed in device.Exemplified by running on mobile terminals, Fig. 1 is a kind of geodata rendering method according to embodiments of the present invention
Mobile terminal hardware block diagram.As shown in figure 1, mobile terminal 10, which can include one or more, (only shows one in Fig. 1
It is individual) (processor 102 can include but is not limited to Micro-processor MCV or PLD FPGA etc. processing to processor 102
Device), the memory 104 for data storage and the transmitting device 106 for communication function.Ordinary skill people
It is appreciated that the structure shown in Fig. 1 is only to illustrate, it does not cause to limit member to the structure of above-mentioned electronic installation.It is for example, mobile
Terminal 10 may also include more either less components than shown in Fig. 1 or have the configuration different from shown in Fig. 1.
Memory 104 can be used for the software program and module of storage application software, such as the geography in the embodiment of the present invention
Programmed instruction/module corresponding to data presentation method, processor 102 are stored in the software program in memory 104 by operation
And module, so as to perform various function application and data processing, that is, realize above-mentioned method.Memory 104 may include height
Fast random access memory, may also include nonvolatile memory, as one or more magnetic storage device, flash memory or other
Non-volatile solid state memory.In some instances, memory 104 can further comprise remotely located relative to processor 102
Memory, these remote memories can pass through network connection to mobile terminal 10.The example of above-mentioned network includes but unlimited
In internet, intranet, LAN, mobile radio communication and combinations thereof.
Transmitting device 106 is used to data are received or sent via a network.Above-mentioned network instantiation may include
The wireless network that the communication providerses of mobile terminal 10 provide.In an example, transmitting device 106 includes a Network adaptation
Device (Network Interface Controller, referred to as NIC), its can be connected by base station with other network equipments so as to
It can be communicated with internet.In an example, transmitting device 106 can be that radio frequency (Radio Frequency, is referred to as
RF) module, it is used to wirelessly be communicated with internet.
One kind is provided in the present embodiment and runs on above-mentioned mobile terminal geodata rendering method, and Fig. 2 is according to this
The flow chart of the geodata rendering method of inventive embodiments, as shown in Fig. 2 the flow comprises the following steps：
Step S202, determine the latitude and longitude information of geodata to be presented；
Step S204, according to the tile division rule in the map of above-mentioned latitude and longitude information and predetermined grade, by above-mentioned
In the tile subpackage for managing data write-in predetermined quantity；Wherein, the map of the predetermined grade includes the tile of predetermined quantity, one
The corresponding tile subpackage of tile；
Step S206, determine the grade of map to be shown, and, it is determined that the grade of above-mentioned map to be shown less than above-mentioned
During predetermined grade, the partial data chosen respectively in the tile subpackage of predetermined quantity is presented on above-mentioned map to be shown.
Wherein, perform aforesaid operations can be terminal.The grade classification of above-mentioned map can be according to the map scaling enter
Row determines that degree is bigger (for example, can show the map of every country), and representing the lower grade of map for example, map reduces,
The degree of map amplification is bigger (for example, can show the map in each province of China), and the higher grade for representing map.
By above-mentioned steps, due in rank lower ground only display portion geodata on figure, it is ensured that carrying out
When map is presented, complete map to be shown can be quickly showed, effectively solves big data present in correlation technique point
Problem is presented in GIS data in analysis, so as to improve Consumer's Experience.
In an optional embodiment, it is determined that after the grade of above-mentioned map to be shown, the above method also includes：
When determining that the grade of above-mentioned map to be shown is greater than or equal to above-mentioned predetermined grade, map to be shown is presented on map to be shown
Including tile corresponding to all data in tile subpackage, wherein, above-mentioned grade is higher than in the show map of predetermined grade
Tile division rule is identical with the tile division rule in the map of predetermined grade.In the present embodiment, on higher ranked ground
In figure, the geographical coverage area that can show that in viewing area is smaller (for example, being only capable of displaying out the geography of Beijing
Scope), therefore, can be the number in tile subpackage corresponding to the tile that current display area includes when carrying out data presentation
According to all display processings, because the data for needing to show are relatively fewer, so, do not interfere with the display speed of map.
In an optional embodiment, rule are divided according to the tile in the map of above-mentioned latitude and longitude information and predetermined grade
Then geodata is write in the tile subpackage of predetermined quantity, including：Determine that geodata is corresponding according to above-mentioned latitude and longitude information
Whole tiles；Judge whether above-mentioned whole tiles are corresponding with tile subpackage；It is not right in the case where judged result is no
The tile that should have tile subpackage creates tile subpackage；By in tile subpackage corresponding to the write-in of above-mentioned geodata.In the present embodiment
In, all geodatas can be divided according to the latitude and longitude information of geodata, and write predetermined grade (for example,
10th grade) under tile corresponding in tile subpackage, wherein, when carrying out the write-in of geodata, can first travel through predetermined etc.
All tiles under level, judge tile subpackage under each tile whether be present, if there is no then establishment tile subpackage, and will
The geodata of the tile subpackage to be written is write in the tile subpackage.Optionally, write by geodata in tile subpackage
Afterwards, the range size of current geographic data layer expression can be recorded, so as to be accomplished fluently for the map denotation of other follow-up grades
Basis.
In an optional embodiment, when it is determined that the grade of above-mentioned map to be shown is less than above-mentioned predetermined grade, point
Partial data that Xuan Qu be in the tile subpackage of predetermined quantity is presented on map to be shown, including：By above-mentioned geographical number
According to the pixel that is converted into the tile that map to be shown includes of latitude and longitude information and pixel is write into map bag to be shown
In the tile included；For the pixel of corresponding two or more geodata, a ground is chosen from the two or more geodata
Data are managed as data to be presented；And for only corresponding to the pixel of a geodata, choose ground corresponding to the pixel
Data are managed as data to be presented；Above-mentioned data to be presented are presented on map to be shown.In the present embodiment, in order to improve watt
Piece draws efficiency and reduces data space, is not necessarily on the relatively low map to be shown of rank by same pixel
All geodatas all presented, can only take a geodata to be drawn, other geodatas can be with
Searched from above-mentioned tile subpackage.
In an optional embodiment, above-mentioned pixel, which is write in the tile that map to be shown includes, to be included：Judge
It whether there is above-mentioned pixel in the tile that map to be shown includes；In the presence of judged result is, above-mentioned picture is utilized
Vegetarian refreshments covers existing pixel in the tile that map to be shown includes；And/or judged result be in the absence of in the case of,
In the tile that above-mentioned pixel write-in map to be shown is included.
In an optional embodiment, position coordinates of the above-mentioned pixel in tile includes：X=(gridX-
TileMinX)/pixW, y=(tileMaxY-gridY)/pixH；Wherein, gridX, gridY are respectively above-mentioned geodata
Longitude and latitude, tileMinX, tileMaxY are respectively the minimum longitude of above-mentioned tile and maximum latitude, and pixW and pixH are picture
The actual size of vegetarian refreshments.In the present embodiment, what the actual size of pixel represented is the actual chi representated by a pixel
Very little, a pixel can be a grid, and when pixel is a square blockage, above-mentioned pixW and pixH are phases
With, when pixel is a rectangular blockage, above-mentioned pixW and pixH represent the reality on two sides of pixel respectively
Border length.
In an optional embodiment, determining the grade of map to be shown includes：Receive request message；According to the request
The tile information carried in message determines above-mentioned map to be shown；It is and true according to the class information carried in the request message
The grade of fixed above-mentioned map to be shown.In the present embodiment, can be according to request message when receiving the request message of front end
The presentation of map is carried out, the class information and tile information of request can be carried in the request message, wherein, the tile information
Can be the numbering of tile, in the present invention, the tile under each grade has respective numbering, is taken according in request message
The tile number of band can determine to need that tile is shown.
From above-described embodiment, the feature of the processing method for the magnanimity geographic information data being related in the present invention is " to divide
And it is controlled, draw on demand ".That is, by whole data, according to map tile rule, (tile that Fig. 3 is the 1st grade divides, other ranks
A tile is divided into four pieces successively), in a certain map denotation rank (such as：10th grade) under drawn in units of tile
Point.The tile data in the range of current visible layer is only drawn in request every time, is read by performing data file, is converted to longitude and latitude
Degree represents；According to the tile division rule of a certain map level (such as the 10th grade), data are divided into multiple tile data subpackages,
Write file；Less than 10 grades of ranks (0-10) are carried out with visible dots extraction to geographic information data (that is, to extract in map
On the geographic information data that is shown), generate tile file；The rank and tile information asked according to front end, reading watt
Piece file or data subpackage file are drawn, and returning to the mode of front end presentation realizes the processing of large quantity geography data.
The geodata of the embodiment of the present invention is presented with reference to specific embodiment and illustrated：
Specific embodiment 1
In the present embodiment (in described below, " grid geography number can also will be communicated to communicate grid geodata
According to " be referred to as " raster data " or " grid ") exemplified by the method in the present invention is illustrated, as shown in figure 4, in the present embodiment
Including step is implemented as follows：
11st, according to the raster data of input, raster data is read, and raster data is converted into latitude and represents (corresponding
Step 1) in Fig. 4；
12nd, according to the tile of a certain map level (n levels) (corresponding to above-mentioned predetermined grade) rule, data are divided into
Multiple data subpackage (corresponding to tile subpackage) (steps 2) corresponded in Fig. 4.
Alternatively, all raster datas are traveled through, are proceeded as follows for each grid：
12.1st, minimax the tile number xmax, ymax, xmin, ymin that computation grid is crossed over；
12.2nd, all tiles that traversal grid is crossed over, judge whether tile has been present in tile subpackage, if deposited
Then grid is being added in the tile subpackage, if it does not exist, then the subpackage of the newly-built tile, it is added by grid
In.
To generated tile subpackage, data can be respectively written into respective file (that is, tile subpackage), and record and work as
The range size that preceding grid data layer represents；
13rd, to the rank (that is, the rank less than n) below n levels, each pixel may correspond to multiple grids, in order to improve
Tile draws efficiency and reduces data space, need not be by all grid corresponding to same pixel when rank is relatively low
Lattice are all preserved, therefore to the grid of same pixel position, are only taken a grid positions information to preserve and be used for drawing i.e.
Can, obtaining for other attribute informations of grid is searched in the data subpackage that can be generated from step 12, and phase is generated for each tile
The tile file answered.(the step 3) corresponded in Fig. 4 can be proceeded as follows to each rank in the rank below n levels：
13.1st, the raster map layer scope obtained according to step 12, the minimax tile number under the rank is obtained；
13.2nd, all tiles are traveled through according to minimax tile number, obtained in the data subpackage obtained from step 12
Grid in the range of the tile, efficiency and reduction data space are drawn in order to further improve tile, by grid longitude and latitude
Degree information is converted into the pixel in tile, and judges that the point with the presence or absence of in the tile, if it is present covering, is not deposited
Then adding in tile, pixel point methods can be as follows in tile for computation grid：
X=(gridX-tileMinX)/pixW
Y=(tileMaxY-gridY)/pixH
Wherein, gridX, gridY are grid longitude and latitude, the minimum longitude of tileMinX, tileMaxY current tile and most
Big latitude, all it can be indicated with Meng Kate coordinates, pixW and pixH are each pixel in current tile on map
The distance (that is, actual size) of expression.
13.3rd, by the grid pixel point information write-in tile file of acquisition.
14th, the rank and tile number asked according to front end, read tile file or data subpackage file is painted
System, return to front end presentation：
If rank is asked, using the tile pixel number evidence of the 0-n levels of generation, directly to be painted below n levels and n levels
System；
If asking rank to calculate tile number of the tile in the n-th rank more than n levels, corresponding n-th grade is read
Tile packetized data, the grid in subpackage file is converted to the screen position in tile drawn (correspond to Fig. 4 in
Step 4).
, can be with the processing magnanimity geographic information data of stability and high efficiency by Geoprocessing method described above.This hair
The time of drafting can be distributed in each request by the method in bright embodiment, and save the required of Geoserver modes
The section time；In addition, the entry time of the processing mode compared to Geoserver+Postgresql, in the embodiment of the present invention
The data of method stored with file, the visible dots data of 0-n ranks are simply added on the basis of raw data file, are taken
Memory space greatly reduce, data processing time also mainly writes time of subpackage file.Therefore, in the embodiment of the present invention
Method can not only draw figure layer rapidly by increasing caching mechanism, and memory space occupancy is substantially and original geodata
File size is suitable, and treatment effeciency is even more to greatly improve.Handled according to real data, under same environment, in 10 and hair line
Journey is handled simultaneously when, the raster data processing time of 50 20,000,000 or so was at 32 minutes or so.Specific treatment effeciency contrast can
With with reference to figure 5.Also, using the method in this method embodiment, the Geoprocessing of a province can only need a service
Device can meet current process demand, greatly save hardware cost.
Specific embodiment 2
User uses this method visual communication data on the GIS under 900913 coordinate-systems, operator passes through GIS exhibitions
Show the distribution situation of communication data geographically, carry out network planning network optimization.
Step 21：Data extraction conversion, using the data that the geodata in communication data and needs are shown as input.
Step 22：The tile packetized data of 10 ranks is generated, travels through all data records, according under 900913 coordinate-systems
The 10th rank data are divided into tile subpackage one by one, calculate the tile number where data record, the data record deposited
It is put into affiliated tile subpackage.Tile number computational methods are as follows：
X=(mercatorX+20037508.3427892)/(res [10] * tileWidth)
Y=(20037508.3427892-mercatorY)/(res [10] * tileHeight)
Wherein, mercatorX, mercatorY represent Meng Kate coordinate representation coordinate points, and res [10] is 900913 coordinates
The resolution ratio of lower 10th rank of system, tileWidth, tileHeight are the wide and high of tile.
Step 23：The tile data of 0-10 ranks is generated, to the tile of 0-10 levels, data are obtained from tile packetized data
Data minimax longitude and latitude scope where recording, the minimax tile number of 0-10 levels is calculated respectively, computational methods are such as
Shown in step 22, tile subpackage is read, calculates the pixel position that data are recorded in tile, computational methods are as follows：
X=(X-tileMinX)/pixW
Y=(tileMaxY-Y)/pixH
Wherein, X (corresponding to above-mentioned gridX), Y (corresponding to above-mentioned gridY) are the longitude and latitude of communication data,
The minimum longitude and maximum latitude of tileMinX, tileMaxY current tile, all it is with Meng Kate coordinate representations, pixW and pixH
Each pixel in current tile i (0 on 900913 coordinate systems<=i<=10) actual range that rank represents.Each
Pixel can only preserve a geodata information, and pixel number is ordered according to write-in tile number (x, y) and rank (level)
Preserved in the tile file (x_y_level) of name.
Step 24：Draw, tile number, for 0-10 levels, the tile data generated from step 23 are asked according to front end
It is middle to obtain corresponding data, directly draw tile and return to front end.For more than 10 grades, then from the tile subpackage of step 22 generation
Tile packetized data corresponding to the tile number of request is found in data and draws tile.Requested tile subpackage is used nearest
Method is not used at most to be cached in internal memory, next time, request obtained from internal memory, improves and draws efficiency.
Specific embodiment 3
User uses this method visual communication data on the GIS under Baidu's coordinate-system, operator is shown by GIS
The distribution situation of communication data geographically, carry out network planning network optimization.
Step 31：Data extraction conversion, using the data that the geodata in communication data and needs are shown as input.
Step 32：The tile packetized data of 10 ranks is generated, travels through all data records, according to Baidu map coordinate-system
Under the 10th rank data are divided into tile subpackage one by one, the tile number where data record is calculated, by the data record
It is stored in affiliated tile subpackage.Tile number computational methods are as follows：
X=(mercatorX+20037508.3427892)/(res [10] * tileWidth)
Y=(mercatorY+20037508.3427892)/(res [10] * tileHeight)
Wherein, mercatorX, mercatorY represent Meng Kate coordinate representation coordinate points, and res [10] sits for Baidu map
The resolution ratio of lower 10th rank of mark system, tileWidth, tileHeight are the wide and high of tile.
Step 33：The tile data of 0-10 ranks is generated, to the tile of 0-10 levels, data are obtained from tile packetized data
Data minimax longitude and latitude scope where recording, the minimax tile number of 0-10 levels is calculated respectively, computational methods are such as
Shown in step 32, tile subpackage is read, calculates the pixel position that data are recorded in tile, computational methods are as follows：
X=(X-tileMinX)/pixW
Y=(tileMaxY-Y)/pixH
Wherein, X, Y be communication data longitude and latitude, the minimum longitude and maximum of tileMinX, tileMaxY current tile
Latitude, all with Meng Kate coordinate representations, pixW and pixH are each pixel in current tile i on Baidu map coordinate system
(0<=i<=10) actual range that rank represents.Each pixel only preserves a geodata information, by pixel number
According to preservation in write-in tile number (x, y) and the tile file (x_y_level) of rank (level) name.
Step 34：Draw, tile number, for 0-10 levels, the tile data generated from step 33 are asked according to front end
It is middle to obtain corresponding data, directly draw tile and return to front end.For more than 10 grades, then from the tile subpackage of step 32 generation
Tile packetized data corresponding to the tile number of request is found in data and draws tile.Requested tile subpackage is used nearest
Method is not used at most to be cached in internal memory, next time, request obtained from internal memory, improves and draws efficiency.
Specific embodiment 4
User uses the method visible environment data in the embodiment of the present invention in GIS map, and environmental data is passed through
GIS is presented.Observation analysis various regions pollution condition, instructional environment regulation and protection.
Step 41：Data extraction conversion, using the data that the geodata in environmental data and needs are shown as input.
Step 42：The tile packetized data of 8 ranks is generated, travels through all data records, according under 900913 coordinate-systems
The 8th rank data are divided into tile subpackage one by one, calculate the tile number where data record, the data record deposited
Into affiliated tile subpackage.Tile number computational methods are as follows：
X=(mercatorX+20037508.3427892)/(res [8] * tileWidth)
Y=(20037508.3427892-mercatorY)/(res [8] * tileHeight)
Wherein, mercatorX, mercatorY represent Meng Kate coordinate representation coordinate points, and res [10] is 900913 coordinates
The resolution ratio of lower 8th rank of system, tileWidth, tileHeight are the wide and high of tile.
Step 43：The tile data of 0-8 ranks is generated, to the tile of 0-8 levels, data note is obtained from tile packetized data
Data minimax longitude and latitude scope where recording, the minimax tile number of 0-8 levels, computational methods such as step are calculated respectively
Shown in 42, tile subpackage is read, calculates the pixel position that data are recorded in tile, computational methods are as follows：
X=(X-tileMinX)/pixW
Y=(tileMaxY-Y)/pixH
Wherein, X, Y be environmental data longitude and latitude, the minimum longitude and maximum of tileMinX, tileMaxY current tile
Latitude, all with Meng Kate coordinate representations, pixW and pixH are each pixel in current tile i (0 on 900913 coordinate systems
<=i<=8) actual range that rank represents.Each pixel only preserves a geodata information, and pixel number evidence is write
Enter and preserved in tile number (x, y) and the tile file (x_y_level) of rank (level) name.
Step 44：Draw, tile number is asked according to front end, for 0-8 levels, in the tile data generated from step 43
Corresponding data are obtained, tile is directly drawn and returns to front end.For more than 8 grades, then from the tile subpackage number of step 42 generation
Tile packetized data corresponding to the tile number of request is found in and draws tile.Requested tile subpackage is used recently most
Unused method is cached in internal memory long, and next time, request obtained from internal memory, improves and draws efficiency.
Specific embodiment 5
User uses this method visualization climatic data in GIS map.Climatic data information is presented on GIS, with
Observe cloud amount, the distribution of rainfall and climate change scenario.
Step 51：Data extraction conversion, using the data that the geodata in climatic data and needs are shown as input.
Step 52：The tile packetized data of 10 ranks is generated, travels through all data records, according under 900913 coordinate-systems
The 10th rank data are divided into tile subpackage one by one, calculate the tile number where data record, the data record deposited
It is put into affiliated tile subpackage.Tile number computational methods are as follows：
X=(mercatorX+20037508.3427892)/(res [10] * tileWidth)
Y=(20037508.3427892-mercatorY)/(res [10] * tileHeight)
Wherein, mercatorX, mercatorY represent Meng Kate coordinate representation coordinate points, and res [10] is 900913 coordinates
The resolution ratio of lower 10th rank of system, tileWidth, tileHeight are the wide and high of tile.
Step 53：The tile data of 0-10 ranks is generated, to the tile of 0-10 levels, data are obtained from tile packetized data
Data minimax longitude and latitude scope where recording, the minimax tile number of 0-10 levels is calculated respectively, computational methods are such as
Shown in step 52, tile subpackage is read, calculates the pixel position that data are recorded in tile, computational methods are as follows：
X=(X-tileMinX)/pixW
Y=(tileMaxY-Y)/pixH
Wherein, X, Y be climatic data longitude and latitude, the minimum longitude and maximum of tileMinX, tileMaxY current tile
Latitude, all with Meng Kate coordinate representations, pixW and pixH are each pixel in current tile i (0 on 900913 coordinate systems
<=i<=10) actual range that rank represents.Each pixel only preserves a geodata information, by pixel number evidence
Write in tile number (x, y) and the tile file (x_y_level) of rank (level) name and preserve.
Step 54：Draw, tile number, for 0-10 levels, the tile data generated from step 53 are asked according to front end
It is middle to obtain corresponding data, directly draw tile and return to front end.For more than 10 grades, then from the tile subpackage of step 52 generation
Tile packetized data corresponding to the tile number of request is found in data and draws tile.Requested tile subpackage is used nearest
Method is not used at most to be cached in internal memory, next time, request obtained from internal memory, improves and draws efficiency.
Through the above description of the embodiments, those skilled in the art can be understood that according to above-mentioned implementation
The method of example can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but a lot
In the case of the former be more preferably embodiment.Based on such understanding, technical scheme is substantially in other words to existing
The part that technology contributes can be embodied in the form of software product, and the computer software product is stored in a storage
In medium (such as ROM/RAM, magnetic disc, CD), including some instructions to cause a station terminal equipment (can be mobile phone, calculate
Machine, server, or network equipment etc.) perform method described in each embodiment of the present invention.
A kind of geodata is additionally provided in the present embodiment and is presented device, and the device is used to realizing above-described embodiment and excellent
Embodiment is selected, had carried out repeating no more for explanation.As used below, term " module " can realize predetermined function
Software and/or hardware combination.Although device described by following examples is preferably realized with software, hardware,
Or the realization of the combination of software and hardware is also what may and be contemplated.
Fig. 6 is the structured flowchart that device is presented in geodata according to embodiments of the present invention, as shown in fig. 6, the device bag
Include determining module 62, writing module 64 and module 66 is presented, the device is illustrated below：
Determining module 62, for determining the latitude and longitude information of geodata to be presented；Writing module 64, it is connected to above-mentioned
Determining module 62, for according to the tile division rule in the map of above-mentioned latitude and longitude information and predetermined grade, by above-mentioned geography
In the tile subpackage of data write-in predetermined quantity；Wherein, the map of the predetermined grade includes the tile of above-mentioned predetermined quantity, and one
The corresponding tile subpackage of individual tile；Present module 66, be connected to above-mentioned writing module 64, for determine map to be shown etc.
Level, and, when it is determined that the grade of above-mentioned map to be shown is less than above-mentioned predetermined grade, the tile point of predetermined quantity is chosen respectively
Partial data in bag is presented on above-mentioned map to be shown.
In an optional embodiment, above-mentioned presentation module 66 is additionally operable to perform following processing：It is determined that above-mentioned wait to show
After the grade of pictorial map, and when determining that the grade of map to be shown is greater than or equal to above-mentioned predetermined grade, above-mentioned to be shown
All data in tile subpackage corresponding to the tile that map to be shown includes are presented on map, wherein, above-mentioned grade is higher than pre-
The tile division rule determined in the show map of grade is identical with the tile division rule in the map of predetermined grade.
Fig. 7 is the structured flowchart that writing module 64 in device is presented in geodata according to embodiments of the present invention, such as Fig. 7 institutes
Show, the writing module 64 includes the first determining unit 72, judging unit 74, creating unit 76 and writing unit 78, below to this
Writing module 64 illustrates：
First determining unit 72, for whole tiles corresponding to determining geodata according to latitude and longitude information；Judging unit
74, above-mentioned first determining unit 72 is connected to, for judging whether above-mentioned whole tiles are corresponding with tile subpackage；Creating unit
76, above-mentioned judging unit 74 is connected to, in the case of being no in the judged result of above-mentioned judging unit 74, not to be corresponding with
The tile of tile subpackage creates tile subpackage；Writing unit 78, above-mentioned creating unit 76 is connected to, for by above-mentioned geodata
In tile subpackage corresponding to write-in.
Fig. 8 is that the structured flowchart one that module 66 is presented in device is presented in geodata according to embodiments of the present invention, such as Fig. 8
Shown, the presentation module 66 includes converting unit 82, chooses unit 84 and display unit 86, and the presentation module 66 is carried out below
Explanation：
Converting unit 82, for the latitude and longitude information of above-mentioned geodata to be converted into the tile that map to be shown includes
Pixel, and above-mentioned pixel is write in the tile that map to be shown includes；Unit 84 is chosen, is connected to above-mentioned conversion list
Member 82, for the pixel for corresponding two or more geodata, a geographical number is chosen from two or more geodata
According to as data to be presented；And for only corresponding to the pixel of a geodata, geodata corresponding to selected pixels point
As data to be presented；Display unit 86, be connected to above-mentioned selection unit 84, for presented on map to be shown it is above-mentioned wait be in
Existing data.
Fig. 9 is the structured flowchart that converting unit 82 in device is presented in geodata according to embodiments of the present invention, such as Fig. 9 institutes
Show, the converting unit 82 includes judgment sub-unit 92 and processing subelement 94, and the converting unit 82 is illustrated below：
Judgment sub-unit 92, for when writing pixel in the tile that map to be shown includes, judging above-mentioned to wait to show
It whether there is above-mentioned pixel in the tile that pictorial map includes；Subelement 94 is handled, above-mentioned judgment sub-unit 92 is connected to, is used for
In the presence of the judged result of above-mentioned judgment sub-unit 92 is, cover what map to be shown included using above-mentioned pixel
Existing pixel in tile；And/or judged result be in the absence of in the case of, the write-in of above-mentioned pixel is to be shown
In the tile that figure includes.
In an optional embodiment, position coordinates of the above-mentioned pixel in tile includes：X=(gridX-
TileMinX)/pixW, y=(tileMaxY-gridY)/pixH；Wherein, gridX, gridY are respectively above-mentioned geodata
Longitude and latitude, tileMinX, tileMaxY are respectively the minimum longitude of above-mentioned tile and maximum latitude, and pixW and pixH are upper
State the actual size of pixel.
Figure 10 is that the structured flowchart two that module 66 is presented in device is presented in geodata according to embodiments of the present invention, is such as schemed
Shown in 10, the presentation module 66 includes receiving unit 102, the second determining unit 104 and the 3rd determining unit 106, below it is right
The presentation module 66 illustrates.
Receiving unit 102, for it is determined that map to be shown grade when, receive request message；Second determining unit
104, above-mentioned receiving unit 102 is connected to, it is above-mentioned to be shown for being determined according to the tile information carried in above-mentioned request message
Map；And the 3rd determining unit 106, above-mentioned second determining unit 104 is connected to, for being taken according in above-mentioned request message
The class information of band determines the grade of map to be shown.
In an optional embodiment, a kind of terminal is additionally provided, the terminal can include above-mentioned Fig. 6 into Figure 10
Any one geodata present device.
It should be noted that above-mentioned modules can be realized by software or hardware, for the latter, Ke Yitong
Cross in the following manner realization, but not limited to this：Above-mentioned module is respectively positioned in same processor；Or above-mentioned modules are with any
The form of combination is located in different processors respectively.
Embodiments of the invention additionally provide a kind of storage medium.Alternatively, in the present embodiment, above-mentioned storage medium can
The program code for performing the step in above-mentioned each method embodiment to be arranged to storage to be used for.
Alternatively, in the present embodiment, above-mentioned storage medium can include but is not limited to：USB flash disk, read-only storage (Read-
Only Memory, referred to as ROM), it is random access memory (Random Access Memory, referred to as RAM), mobile hard
Disk, magnetic disc or CD etc. are various can be with the medium of store program codes.
Alternatively, in the present embodiment, processor performs above-mentioned each step according to the program code stored in storage medium
Suddenly.
Alternatively, the specific example in the present embodiment may be referred to described in above-described embodiment and optional embodiment
Example, the present embodiment will not be repeated here.
Obviously, those skilled in the art should be understood that above-mentioned each module of the invention or each step can be with general
Computing device realize that they can be concentrated on single computing device, or be distributed in multiple computing devices and formed
Network on, alternatively, they can be realized with the program code that computing device can perform, it is thus possible to they are stored
Performed in the storage device by computing device, and in some cases, can be with different from shown in order execution herein
The step of going out or describing, they are either fabricated to each integrated circuit modules respectively or by multiple modules in them or
Step is fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific hardware and software combination.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (15)
- A kind of 1. geodata rendering method, it is characterised in that including：Determine the latitude and longitude information of geodata to be presented；According to the tile division rule in the map of the latitude and longitude information and predetermined grade, the geodata is write predetermined In the tile subpackage of quantity；Wherein, the map of the predetermined grade includes the tile of the predetermined quantity, and a tile is corresponding One tile subpackage；The grade of map to be shown is determined, and, when it is determined that the grade of the map to be shown is less than the predetermined grade, point The partial data do not chosen in the tile subpackage of the predetermined quantity is presented on the map to be shown.
- 2. according to the method for claim 1, it is characterised in that described it is determined that after the grade of the map to be shown Method also includes：When it is determined that the grade of the map to be shown is greater than or equal to the predetermined grade, presented on the map to be shown All data in tile subpackage corresponding to the tile that the map to be shown includes, wherein, the grade is predetermined higher than described Tile division rule in the show map of grade is identical with the tile division rule in the map of the predetermined grade.
- 3. according to the method for claim 1, it is characterised in that according to the ground of the latitude and longitude information and the predetermined grade Tile division rule in figure writes the geodata in the tile subpackage of the predetermined quantity, including：Whole tiles according to corresponding to the latitude and longitude information determines the geodata；Judge whether whole tiles are corresponding with tile subpackage；It is that the tile for not being corresponding with tile subpackage creates tile subpackage in the case where judged result is no；By in tile subpackage corresponding to geodata write-in.
- 4. according to the method for claim 1, it is characterised in that it is determined that the grade of the map to be shown less than described pre- When determining grade, the partial data chosen respectively in the tile subpackage of the predetermined quantity is on the map to be shown It is existing, including：The pixel latitude and longitude information of the geodata being converted into the tile that the map to be shown includes, and by institute Pixel is stated to write in the tile that the map to be shown includes；For the pixel of corresponding two or more geodata, a geodata is chosen from described two above geodatas As data to be presented；And for only corresponding to the pixel of a geodata, choose geographical number corresponding to the pixel According to as data to be presented；The data to be presented are presented on the map to be shown.
- 5. according to the method for claim 4, it is characterised in that the pixel is write what the map to be shown included Include in tile：Judge to whether there is the pixel in the tile that the map to be shown includes；In the presence of judged result is, is covered in the tile that the map to be shown includes and existed using the pixel Pixel；And/orIt is in the absence of in the case of in judged result, the pixel is write in the tile that the map to be shown includes.
- 6. the method according to claim 4 or 5, it is characterised in that position coordinates of the pixel in the tile Including：X=(gridX-tileMinX)/pixW,Y=(tileMaxY-gridY)/pixH；Wherein, gridX, gridY are respectively the longitude and latitude of the geodata, and tileMinX, tileMaxY are respectively institute State the minimum longitude of tile and maximum latitude, pixW and the actual size that pixH is the pixel.
- 7. according to the method for claim 1, it is characterised in that determining the grade of map to be shown includes：Receive request message；Tile information according to being carried in the request message determines the map to be shown；AndClass information according to being carried in the request message determines the grade of the map to be shown.
- 8. device is presented in a kind of geodata, it is characterised in that including：Determining module, for determining the latitude and longitude information of geodata to be presented；Writing module, for according to the tile division rule in the map of the latitude and longitude information and predetermined grade, by described In the tile subpackage for managing data write-in predetermined quantity；Wherein, the map of the predetermined grade includes watt of the predetermined quantity Piece, the corresponding tile subpackage of a tile；Module is presented, for determining the grade of map to be shown, and, it is determined that the grade of the map to be shown less than described During predetermined grade, the partial data chosen respectively in the tile subpackage of the predetermined quantity is on the map to be shown It is existing.
- 9. device according to claim 8, it is characterised in that the presentation module is additionally operable to perform following processing：True After the grade of the fixed map to be shown, and determine that the grade of the map to be shown is greater than or equal to the predetermined grade When, all data in tile subpackage corresponding to the tile that the map to be shown includes are presented on the map to be shown, Wherein, the grade is higher than in the tile division rule and the map of the predetermined grade in the show map of the predetermined grade Tile division rule it is identical.
- 10. device according to claim 8, it is characterised in that said write module includes：First determining unit, for whole tiles corresponding to determining the geodata according to the latitude and longitude information；Judging unit, for judging whether whole tiles are corresponding with tile subpackage；Creating unit, it is watt for not being corresponding with tile subpackage in the case of being no in the judged result of the judging unit Piece creates tile subpackage；Writing unit, for by tile subpackage corresponding to geodata write-in.
- 11. device according to claim 8, it is characterised in that the presentation module includes：Converting unit, for the latitude and longitude information of the geodata to be converted into the tile that the map to be shown includes Pixel, and in the tile that the pixel write-in map to be shown is included；Unit is chosen, for the pixel for corresponding two or more geodata, is selected from described two above geodatas A geodata is taken as data to be presented；And for only corresponding to the pixel of a geodata, choose the pixel Geodata is as data to be presented corresponding to point；Display unit, for the data to be presented to be presented on the map to be shown.
- 12. device according to claim 11, it is characterised in that the pixel is being write into the map bag to be shown When in the tile included, the converting unit includes：Judgment sub-unit, it whether there is the pixel in the tile included for judging the map to be shown；Subelement is handled, in the presence of being in the judged result of the judgment sub-unit, is covered using the pixel Cover existing pixel in the tile that the map to be shown includes；And/or judged result be in the absence of in the case of, will The pixel is write in the tile that the map to be shown includes.
- 13. the device according to claim 11 or 12, it is characterised in that position of the pixel in the tile is sat Mark includes：X=(gridX-tileMinX)/pixW,Y=(tileMaxY-gridY)/pixH；Wherein, gridX, gridY are respectively the longitude and latitude of the geodata, and tileMinX, tileMaxY are respectively institute State the minimum longitude of tile and maximum latitude, pixW and the actual size that pixH is the pixel.
- 14. device according to claim 8, it is characterised in that it is determined that map to be shown grade when, the presentation mould Block includes：Receiving unit, for receiving request message；Second determining unit, for determining the map to be shown according to the tile information carried in the request message；And3rd determining unit, for determined according to the class information carried in the request message the map to be shown etc. Level.
- 15. a kind of terminal, it is characterised in that the terminal includes the device any one of claim 8 to 14.
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| PCT/CN2016/110416 WO2017206484A1 (en) | 2016-05-30 | 2016-12-16 | Geographic data presentation method and apparatus |
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