CN107885867A - The synthetic method and synthesis system of map slice of data - Google Patents

The synthetic method and synthesis system of map slice of data Download PDF

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Publication number
CN107885867A
CN107885867A CN201711177546.4A CN201711177546A CN107885867A CN 107885867 A CN107885867 A CN 107885867A CN 201711177546 A CN201711177546 A CN 201711177546A CN 107885867 A CN107885867 A CN 107885867A
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map
merging
data
section
server
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赵国庆
张帅
管发海
刘万明
滕媛媛
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Suzhou Unimap Software Co Ltd
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Suzhou Unimap Software Co Ltd
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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
    • G06F16/50—Information retrieval; Database structures therefor; File system structures therefor of still image data
    • G06F16/51—Indexing; Data structures therefor; Storage structures
    • 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
    • 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
    • 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
    • G06F16/957—Browsing optimisation, e.g. caching or content distillation
    • G06F16/9574—Browsing optimisation, e.g. caching or content distillation of access to content, e.g. by caching
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T3/00—Geometric image transformations in the plane of the image
    • G06T3/40—Scaling of whole images or parts thereof, e.g. expanding or contracting
    • G06T3/4038—Image mosaicing, e.g. composing plane images from plane sub-images

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  • Theoretical Computer Science (AREA)
  • Databases & Information Systems (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Data Mining & Analysis (AREA)
  • General Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Remote Sensing (AREA)
  • Computer And Data Communications (AREA)

Abstract

The present invention refers to a kind of synthetic method of map slice of data, including：Map access request a to map server, the map server for sending a selection area cuts into slices the map of the designated area, generates several maps section mark in a grid-like fashion；The map access request of selection area is sent to map server；The map generated in a grid-like fashion the section mark from map server feedback is received, the map received section mark is preserved according to line number, and the section flag of the map to have preserved merges rule；Map section mark origin is set, and the map locally preserved according to merging rule set in advance with merging, which is cut into slices, to be identified, and generates local map.The present invention also provides a kind of map slice of data server, and methods and apparatus of the present invention can be in the case where that can not network, file of reliably spreading out the map.Due to improving the efficiency of map conflation, the speed of loading by the way of multithreading merging.

Description

The synthetic method and synthesis system of map slice of data
Technical field
The present invention relates to technical field of information processing, belong to the synthetic method and synthesis system of map slice of data.
Background technology
With electronic map deeply should in GIS-Geographic Information System (GeographicInformationSystem, GIS) With the making to electronic map slice library proposes higher and higher requirement.Electronic map slice library is made mainly using ground at present Figure caching technology, so-called cache map, refer to perform the operation such as map view, inquiry, editor, analysis in Map Service of Network When, cut figure in advance in particular manner to map datum/picture, and figure result will be cut and be placed on service end as caching.Map Caching generally alternatively referred to as map section.
Using cache map, when user accesses same data/picture afterwards, it is not necessary to which server regenerates, just Information can be directly obtained, so as to improve the access efficiency of data.Therefore, cache map technology can effectively improve generalized information system Operating efficiency.
At present, map datum is all based on the form issue of image slice in network Map Services.First, have Map server to from satellite reception to map image or the map image that obtains by other means merge, obtain one The complete map image of width；Then, using microtomy, the map image after fusion is cut into slices, map image is obtained and cuts Piece, map image is sent afterwards and is cut into slices to client, map image slice is spliced by the browser of client, shown. In the prior art, server, which carries out fusion to map image, needs to take ample resources.Generally merge 4 1G map image number According to different, it is necessary to 10 minutes to 1 hours according to machine performance；Also, when being merged, it is necessary to which manual search is to phase Adjacent image remerges, and whole fusion process is comparatively laborious, and efficiency is low.Exemplified by updating map image section：First, service Device carries out adjacent image mark to the map image of reception；Then, fusion treatment is carried out to adjacent map image；It is right after again Map image after fusion is cut into slices；Finally, original map image is updated with the map image section newly obtained to cut into slices.
But the software for that can not use Map Services and there is corresponding geographical position to show demand, Map Services are usually Technology barriers are formed, how public map section is converted to the map picture locally deposited becomes particularly significant.
To sum up, at least there is following defect in map image section update method of the prior art：Need manually to demarcate phase Adjacent map image, efficiency is low and poor reliability；The map image data of big data quantity carry out fusion treatment, expend system money The problems such as channel is unstable, and bandwidth is relatively low be present in source, cordless communication network.
The content of the invention
It is an object of the invention to provide a kind of synthetic method and synthesis system of map slice of data, can be sat by grid Mark numbering carries out file storage of cutting into slices, during slice-merging according to the actual use demand of user in a manner of the merging set The method of quick composing picture, the merging process can also be carried out under without network condition.
To reach above-mentioned purpose, the present invention provides following technical scheme：
A kind of synthetic method of map slice of data, including：
The map access request of a selection area is sent to a map server, the map server be configured in response to A map access request for including any designated area information is received, the map of the designated area is given birth in a grid-like fashion Cut into slices and identify into several maps；
The map generated in a grid-like fashion the section mark from map server feedback is received, the map received is cut Piece mark preserves according to line number, while the section mark of the map to be each saved generates one-to-one spatial data files；
There is provided one and merge rule editor, for the merging rule edited and setting map is cut into slices；
One of map section is set to be identified as origin, according to the merging rule for merging rule editor, with reference to space The map section mark that data file is locally preserved with merging, generates local map.
Based on preceding method, the present invention further mentions a kind of synthesis system of map slice of data, including：
Communication module, map access request to map server, the map server for sending a selection area are set It is set in response to receiving a map access request for including any designated area information, by the map of the designated area, with Network style generates several maps section mark；
Receiving module, will for receiving the map generated in a grid-like fashion the section mark from map server feedback The map section mark received preserves according to line number, while the section mark generation of the map to be each saved is one-to-one Spatial data files；
Merge rule editor, for the merging rule edited and setting map is cut into slices；
Merging module, for setting one of map section to be identified as origin, according to the merging for merging rule editor Rule, the map locally preserved with reference to spatial data files with merging, which is cut into slices, to be identified, and generates local map.
The beneficial effects of the present invention are：The synthesis system of this map slice of data need not charge, and the map downloaded Definition is higher, when downloading image in a big way, also can reliably realize the loading of map, is not in that file can not make With or damage.
Due to the map section mark on map server is saved in the memory module of home server, can not join In the case of net, the map file of correlation also can be reliably opened.
Due to improving the efficiency of map conflation, the speed of loading by the way of multithreading merging.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention, And can be practiced according to the content of specification, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail as after.
Brief description of the drawings
Fig. 1 is the flow chart of the synthetic method of the map slice of data of the present invention.
Fig. 2 is the internal module connection diagram of the home server of the present invention.
Fig. 3 is the schematic diagram of the network style of the present invention.
Fig. 4 is the schematic diagram of the file locally preserved of the present invention.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
As shown in figure 1, the present invention refers to a kind of synthetic method of map slice of data, including：
Step 1, map access request a to map server, map server of one selection area of transmission are configured to In response to receiving a map access request for including any designated area information, by the map of the designated area, with grid Mode generates several maps section mark.
Map server herein can also use some map softwares of the prior art with independent development, such as Baidu map, high moral map, Google Maps etc..
Map server is when receiving the map access request from user, by according to the determination pair of the access request of transmission The region answered, the map in the region is divided into several maps section mark, then the map section mark packing of generation is anti- Feed user.
With reference to Fig. 3, the dividing method of area map has many kinds, and its dividing method of different map softwares may be different, For the angle quickly merged, in a manner of grid carrying out cutting is preferred, on the one hand, the display screen at existing customer end is mostly to grow It is square, carry out dividing that shape is more regular, and on the other hand, the division of network style can use most basic X- in a grid-like fashion Y-coordinate system, be advantageous to follow-up combining step.
For example, the map section mark for needing to download is accessed by the way of invocation map service interface, wherein with Exemplified by ArcGIS section services, the slice address of map is inputted, map section mark is downloaded from the address.
Step 2, the map generated in a grid-like fashion the section mark from map server feedback is received, as shown in figure 4, The map received section mark is preserved according to line number, while the section mark generation of the map to be each saved corresponds Spatial data files.
Spatial data files are primarily to identify the position that the section of each map is in the area map, therefore, The spatial data files of each map section are different.
As one example of which, it is assumed that the map section mark of a certain designated area is entered by way of grid Arrangement is gone, i.e., the designated area can have been found by splitting each map section mark of generation by the combination of ranks Corresponding unique position.
As shown in figure 4, the map section mark of the designated area determines the text preserved during preservation according to line number Part presss from both sides, and often several maps section mark preserves according still further to certain numeric order corresponding to row, and map section mark can protect Save as jpg forms or tif forms.
When the map section that the home server preserves is identified as jpg forms, the jwg text of the same name with picture is created Part, when the map section that the home server preserves is identified as tif forms, establishment and picture tfw files of the same name, it is easy to Subsequently picture is called and handled.
This process is illustrated with a simply example below, it is specific as follows：
The coordinate of single grid is X=G* (row number -1)；Y=-G* (line number -1).
Wherein, the X is value of the single grid in X-direction, Y be single grid in the value of Y direction, G is each net The pixel resolution of lattice.
Starting point of this grid of R1C1 as whole photomap, the size of each grid is the pixels of 256 pixel * 256, The coordinate x=256* (row number -1) of single grid, y=-256* (line number -1).
Then in row R1：
C1 coordinates are (0,0)；
C2 coordinates are (256*1,0)；
C3 coordinates are (256*2,0)；
……
In row R2：
C1 coordinates are (0, -256*1)；
C2 coordinates are (256*1, -256*1)；
C3 coordinates are (256*2, -256*1)；
Further, during for often capable map section mark increase spatial data files, create of the same name with picture Jgw files or tfw files,
A=(maxX-minX)/numX；
D, B are 0；
E=(minY-maxY)/numY；
C=minY；
F=maxY；
Pixel resolution wherein on A=X directions, D=rotary systems, B=rotary systems, the pixel in E=Y directions are differentiated Rate, C=grating map top left corner pixels center X-coordinate, F=grating map top left corner pixels center Y-coordinate.
By above procedure, the name to a designated area map section is completed, preserves and generates one-to-one Spatial data files think follow-up map slice-merging process services.
Step 3, a merging rule editor is provided, merge rule for editing and setting.
Step 4, one of map section is set to be identified as origin, according to the merging rule for merging rule editor, knot The map section mark that spatial data files locally preserve to merge is closed, generates local map.
The setting for merging rule has diversity, it is preferred that is set and is preferred according to the actual demand of user, below by two Individual example come illustrate this rule.
One embodiment
Map section mark merging rule be using the upper left corner of selected map as origin, by way of grid by Often capable map section mark merges, and the map section mark after merging again with adjacent lines merges.
Second embodiment
The merging rule of map section mark can also be that the region selected according to user is origin, the area that will be selected with user Merging is realized in the way of being successively merged in the way of row and column in the adjacent region in domain.
When user is regular using the first merging, the display process of map is carried out line by line, meets checking for user Custom, gradually to check from left to right from top to bottom.
When user merges regular using second, then the region that can select user is shown to user first, then by The geographical map details on secondary display selection area periphery, make user know the information of selection area first.
It should be appreciated that more merging rules can also be set by merging rule editor, it is preferred that due to each user's Check that custom is different, the scene to consult a map is also different, merges rule by user from edlin or selection.
But each user is different to the Grasping level of software, therefore used for the ease of user, the merging rule editing Device is built-in with several default merging rules, and user according to the actual requirements, directly chooses one of merging rule, progress ground The merging of figure, the merging rule of one of merging rule by default can also be set according to daily habits.
Above-mentioned formula is further elaborated exemplified by a manner of the first merging, specifically, assuming that certain designated area amounts to The map section of 8 rows 12 row is generated, its merging process will be carried out according to following combining steps：
The first step, all pictures in R1 rows are synthesized into R1.jpg, i.e.,：
R1C1+R1C2+R1C3+R1C4+R1C5+R1C6+R1C7+R1C8+R1C9+R1C10+R1C11+R1C12= R1.jpg。
Second step, all pictures in R2 rows are synthesized into R2.jpg, i.e.,：
R2C1+R2C2+R2C3+R2C4+R2C5+R2C6+R2C7+R2C8+R2C9+R2C10+R2C11+R2C12= R2.jpg。
By that analogy, 8 picture files are obtained after this end of the step, be named as successively：R1,R2,R3,R4,R5,R6, R7,R8。
3rd step, this 8 files four or four are merged, i.e. R1+R2+R3+R4, R5+R6+R7+R8, obtain two picture texts Part：R1-R4,R5-R8.
4th step, both of these documents is merged, and finally gives the section synthesising picture of user's specified range.The principle of merging The total size for being section to be synthesized can not be more than the 50% of user computer internal memory.
Illustrate the program and process that merge with reference to a specific example, it is specific as follows：
private void JoinImg(string filePath)
{
DirectoryInfo df=new DirectoryInfo (filePath)；
String saveFile=filePath+ " .GIFf "；
if(File.Exists(saveFile))
return；
FileInfo [] fileArray=df.GetFiles ()；
Int imgHeight=0, imgWidth=0；
ImgWidth=fileArray.Length*width；
ImgHeight=width；
Bitmap joinedBitmap=new Bitmap (imgWidth, imgHeight, PixelFormat.Format24bppRgb)；
Graphics graph=Graphics.FromImage (joinedBitmap)；
graph.Clear(System.Drawing.Color.White)；
For (int i=0；i<fileArray.Length；i++)
{
String imgFile=fileArray [i] .DirectoryName+ " "+(i+680) .ToString ()+" .GIF"；
if(File.Exists(imgFile))
{
Bitmap img=new Bitmap (imgFile)；
graph.DrawImage(img,i*width,0)；
img.Dispose()；
}
else
{
richTextBox1.AppendText(imgFile+"\n")；
}
}
graph.Dispose()；
joinedBitmap.Save(saveFile,ImageFormat.GIFf)；
richTextBox2.AppendText(saveFile+"\n")；
joinedBitmap.Dispose()；
}
The automatic consolidation procedure more than, mark that each map can be cut into slices are merged automatically, and using The first merges mode, i.e. the map section first merged in same a line generates single row map, then merges adjacent row one by one To complete the merging of whole designated area map.
In certain embodiments, map server can also possess the function of request feedback, to accelerate hotspot request region Map speed of download.
Specifically, map server has a memory module and a counting module, wherein, counting module is any to calculate Region is requested the number accessed in setting time section, and the number for being requested access in setting time section when a certain region reaches During to given threshold, the map server in transmission, cut into slices to next local service for asking the area map by the area map During device, it will while a feedback command is sent, the feedback command is used to ask current home server in generation spatial data text After part, the spatial data files of generation and map section mark are sent into the memory module of map server and preserved, and It is and corresponding with the area map.
When map server receives the access request for coming from user terminal on the region again, it will from memory module In directly invoke spatial data files and map section mark, transmit to user terminal, according to user terminal set merging advise The map conflation work of access region is then made requests on, this undoubtedly will greatly reduce the processing time of user terminal.
In order to prevent take up the internal memory of map server, it is preferred that the counting of counting module has ageing, works as setting time When the access times in the region are less than given threshold in section, the spatial data files in the region and map section are identified from storage Deleted in module, to ensure to take the memory space of memory module, while the operation speed of map server can also be accelerated Degree.
In order to further accelerate the processing speed of map, the merging of the spatial data files uses multiple threads.
With reference to Fig. 2, based on preceding method, the present invention further mentions a kind of synthesis system of map slice of data, including communication Module, receiving module, merge rule editor, merging module.
Communication module, for sending the map access request of a selection area to map server, the map server quilt It is arranged to, in response to receiving a map access request for including any designated area information, the map of the designated area be cut Piece, several maps section mark is generated in a grid-like fashion.
Receiving module, will for receiving the map generated in a grid-like fashion the section mark from map server feedback The map section mark received preserves according to line number.
Merge rule editor, for the merging rule edited and setting map is cut into slices.
Merging module, for set map section mark origin, according to merge rule editor set merging rule with Merge the map section mark locally preserved, generate local map.
From above technology contents, the device of the merging of this map slice of data need not charge, and the map downloaded Definition is higher, when downloading image in a big way, also can reliably realize the loading of map, is not in that file can not make With or damage.
Due to the map section on map server is saved in the memory module of home server, what can not be networked In the case of, it also can reliably open related map file.
Due to improving the efficiency of map conflation, the speed of loading by the way of multithreading merging.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.

Claims (10)

  1. A kind of 1. synthetic method of map slice of data, it is characterised in that including：
    The map access request of a selection area is sent to a map server, the map server is configured in response to receiving The map access request for including any designated area information to one, by the map of the designated area, if generating in a grid-like fashion Dry map section mark；
    The map generated in a grid-like fashion the section mark from map server feedback is received, the map received is cut into slices and marked Knowledge preserves according to line number, while the section mark of the map to be each saved generates one-to-one spatial data files；
    There is provided one and merge rule editor, for the merging rule edited and setting map is cut into slices；
    One of map section is set to be identified as origin, according to the merging rule for merging rule editor, with reference to spatial data The map section mark that file is locally preserved with merging, generates local map.
  2. 2. the synthetic method of map slice of data as claimed in claim 1, it is characterised in that the map section received Mark establishes file, and picture and the position one-to-one corresponding of grid in file, the wherein map in grid according to line number Section mark coordinate be：
    X=G* (row number -1)；
    Y=-G* (line number -1)；
    Wherein, the X be map section mark single grid X-direction value, Y be single grid Y direction value, G is the pixel resolution of each grid.
  3. 3. the synthetic method of map slice of data as claimed in claim 2, it is characterised in that the spatial data files be with Picture jgw files or tfw files of the same name,
    A=(maxX-minX)/numX；
    D, B are 0；
    E=(minY-maxY)/numY；
    C=minY；
    F=maxY；
    Pixel resolution wherein on A=X directions, D=rotary systems, B=rotary systems, the pixel resolution in E=Y directions, C =grating map top left corner pixel center X-coordinate, F=grating map top left corner pixels center Y-coordinate.
  4. 4. the synthetic method of map slice of data as claimed in claim 1, it is characterised in that the map server has one Counting module and a memory module；
    The counting module reaches setting number, generation one in response to the accessed request in any one region in setting time section For asking the back feeding for feeding back the regional space data file to instruct, and back feeding instruction is sent to next request and accessed The user in the region；
    The map server receives the regional space data file from foregoing user feedback, by the map in the sum region Section mark stores to memory module together.
  5. 5. the synthetic method of the map slice of data as described in claim 1 or 3, it is characterised in that the spatial data files Merging merged using first single file, single file merges row adjacent thereto after merging.
  6. 6. the synthetic method of map slice of data as claimed in claim 5, it is characterised in that the conjunction of the spatial data files And use multiple threads.
  7. 7. the synthetic method of map slice of data as claimed in claim 1, it is characterised in that in the merging rule editor It is equipped with several default merging rules.
  8. 8. the synthetic method of map slice of data as claimed in claim 3, it is characterised in that when the home server preserves Map section when being identified as jpg forms, create with picture jwg files of the same name, when the map that the home server preserves When section is identified as tif forms, create and picture tfw files of the same name.
  9. 9. the synthetic method of map slice of data as claimed in claim 1, it is characterised in that the original of the map section mark Point is the upper left corner of map.
  10. A kind of 10. synthesis system of map slice of data, it is characterised in that including：
    Communication module, map access request to map server, the map server for sending a selection area are configured to In response to receiving a map access request for including any designated area information, by the map of the designated area, with grid Mode generates several maps section mark；
    Receiving module, for receiving the map generated in a grid-like fashion the section mark from map server feedback, it will receive To map section mark preserve according to line number；
    Merge rule editor, for the merging rule edited and setting map is cut into slices；
    Merging module, for setting map section mark origin, according to merging merging rule that rule editor sets to merge The map section mark locally preserved, generates local map.
CN201711177546.4A 2017-11-22 2017-11-22 The synthetic method and synthesis system of map slice of data Pending CN107885867A (en)

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CN110602235A (en) * 2019-09-23 2019-12-20 北京中农信达信息技术有限公司 PB-level remote sensing image data service publishing and slicing technology
CN110647608A (en) * 2019-08-30 2020-01-03 深圳震有科技股份有限公司 Map-based mass data aggregation display method, system, device and medium
WO2020006685A1 (en) * 2018-07-03 2020-01-09 深圳前海达闼云端智能科技有限公司 Method for establishing map, and terminal and computer readable storage medium
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