CN103677930B - Based on GIS data loading method and the device of spelling wall system - Google Patents
Based on GIS data loading method and the device of spelling wall system Download PDFInfo
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Abstract
A kind of based on GIS data loading method and the device of spelling wall system, described method includes step: calculate the distributed caching parameter of each Node station according to default Node station quantity, wherein said distributed caching parameter comprises element number and the scope of data of each unit of the GIS data of request；According to corresponding distributed caching parameter described GIS data it is loaded into the internal memory of each Node station and is compressed, GIS data loading procedure adjusts the distributed caching parameter of Node station in real time；If each Node station completes to load any cell of described GIS data, read and show corresponding GIS data.Above-mentioned GIS data loading method based on spelling wall system and device, the equilibrium achieving GIS data by adjusting distributed caching parameter in GIS data loading procedure in real time quickly loads.
Description
Technical field
The present invention relates to the information transmission technology, particularly relate to a kind of based on the GIS data loading spelling wall system
Method and device.
Background technology
GIS (Geographic Information System, GIS-Geographic Information System) is a kind of the heaviest
The space information system wanted.It is under computer hardware and software system is supported, to earth table all or in part
Relevant geographic distribution data in layer (including atmosphere) space is acquired, stores, manages, computing,
The technological system analyze, being shown and described.
Various data have the hierarchical attribute of GIS, can use GIS data model that data are divided into arrow
Amount data, raster data, three-dimensional Grid (grid) or TIN (triangular mesh), multimedia picture video
And document.Traditional GIS data loading method has local cache, multi thread and multi task etc..Such as by GIS
Data are loaded into home server, the resource script of GIS data described in manual configuration, client application
Read described resource script and carry out GIS data loading.Although these technology improve GIS to a certain extent
Data loading performance, but still in place of Shortcomings, such as multithreading loading procedure loads and not necessarily equalizes；
When GIS data amount is excessive, the substantial amounts of IO of local cache (Input/output, input/output) reads easily
Cause GIS data loading velocity slow.
Summary of the invention
Based on this, it is necessary to for the problems referred to above, it is provided that a kind of based on the GIS data loading side spelling wall system
Method and device, make to meet big data quantity GIS data in the case of taking less hardware resource quickly the most all
Weighing apparatus loads and display, it is achieved the animated walk-through of GIS map.
A kind of GIS data loading method based on spelling wall system, including step:
The distributed caching parameter of each Node station is calculated according to default Node station quantity, wherein said distributed
Cached parameters comprises the element number of the GIS data of request and the scope of data of each unit；
According to corresponding distributed caching parameter, described GIS data it is loaded into the internal memory of each Node station and carries out
Compression, adjusts the distributed caching parameter of Node station in GIS data loading procedure in real time；
If each Node station completes to load any cell of described GIS data, read and show corresponding GIS data.
A kind of GIS data charger based on spelling wall system, including:
Distributed server, for calculating the distributed caching ginseng of each Node station according to the Node station quantity preset
Number and the real-time distributed caching parameter adjusting Node station, wherein said distribution in GIS data loading procedure
Formula cached parameters comprises the element number of the GIS data of request and the scope of data of each unit；
The each Node station being connected with described distributed server, being used for will according to corresponding distributed caching parameter
Described GIS data is loaded into the internal memory of each Node station and is compressed；
The each client being connected with described distributed server, for completing to load described GIS when each Node station
During any cell of data, it is used for reading and show corresponding GIS data.
Above-mentioned GIS data loading method based on spelling wall system and device, by adjusting distributed caching in real time
Parameter realizes the equilibrium of GIS data and quickly loads；When the GIS data of any cell has loaded, read
With the corresponding GIS data of display in real time, it is ensured that the speed of display；Distributed owing to spelling the Node station of wall system
Load GIS data, and provide GIS data to client, it is possible to support that multiple client is to GIS number
According to being read out and showing.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the inventive method embodiment；
Fig. 2 is the schematic flow sheet that the inventive method adjusts Node station distributed caching parameter embodiment in real time；
Fig. 3 is the structural representation of apparatus of the present invention embodiment.
Detailed description of the invention
Detailed description of the invention based on the GIS data loading method spelling wall system to the present invention below in conjunction with the accompanying drawings
It is described in detail.
As it is shown in figure 1, a kind of GIS data loading method based on spelling wall system, including step:
The Node station quantity that S110, basis are preset calculates the distributed caching parameter of each Node station, wherein said
Distributed caching parameter comprises the element number of the GIS data of request and the scope of data of each unit；
S120, according to corresponding distributed caching parameter, described GIS data is loaded into the internal memory of each Node station
And be compressed, GIS data loading procedure adjusts the distributed caching parameter of Node station in real time；
If each Node station of S130 completes to load any cell of described GIS data, read and show corresponding GIS
Data.
The Node station quantity preset in step S110 is the Node station quantity that default participation GIS data loads；
The data of described unit refer to the GIS data that can show with independent body, and described scope of data is GIS number
The data area divided according to Node station quantity etc. according to unit, such as, be divided into several by the GIS data of request
Figure layer, the data of each figure layer can be organized alone display, be divided according to Node station quantity etc. by each figure layer
For several data areas, in one embodiment, each Node station can connect with network, data each other
Transmission is shared, and each Node station loads GIS according to the respective data area of the layer count calculated and each figure layer
Data.
In step S130, each Node station completes to load any cell of described GIS data to refer to each Node station complete
When becoming to load any one GIS data unit that can independently show, the most each Node station completes to load one
During the data of figure layer, it is possible to read and show the GIS data that described loading completes, it is achieved that GIS data
Real-time display.
Step S120 adjusts in GIS data loading procedure the distributed caching parameter of Node station in real time, can
Change with the state according to each Node station, such as internal memory change etc., adjust the distributed caching of Node station in real time
Parameter, to ensure that the GIS data loading of Node station reaches optimum performance, quickly enters the GIS data of request
Row loads.The GIS data being loaded into internal memory is compressed, data can be saved and take up room so that it is deposit
Store up more GIS data.The distributed caching parameter of adjustment Node station reaches optimum performance in real time has many
Plant embodiment, such as, as in figure 2 it is shown, in one embodiment, S120 loaded in GIS data
The step adjusting Node station distributed caching parameter in journey in real time may include that
S121, monitor the GIS data loading speed of each Node station, adjust in real time according to GIS data loading speed
The distributed caching parameter of whole respective nodes machine；Such as, if Node station loading speed is very fast, then distribution is adjusted
Formula cached parameters makes it load more GIS data；If Node station loading speed is relatively slow, then adjust distributed
Cached parameters makes it load less GIS data；If Node station loading speed is 0, such as, break down, then
Add new Node station and substitute described Node station, by the distributed caching parameter adjustment of described Node station be simultaneously
The distributed caching parameter etc. of new Node station；
S122, monitor the idle condition of each Node station, if Node station is idle condition, adjust corresponding in good time
Distributed caching parameter makes described Node station load GIS data, to assist other Node station to complete the GIS of request
The loading of data, it is ensured that the GIS data of Node station loads and reaches optimum performance；Or described Node station is preserved
GIS data serializing, preserve into local data, convenient after the demand that loads of GIS data；Wherein will
The GIS data serializing that idle node machine preserves occurs after it loads new GIS data, if the most not
Need idle Node station to load new GIS data, then the GIS data preserved by described Node station serializes；
S123, monitor the internal memory of each Node station, if Node station memory consumption is relatively big, increase new Node station also
Adjust in real time corresponding distributed caching parameter, or the GIS data of described Node station internal memory is carried out IO write,
Such as write file system etc., with releasing memory space, prevent from producing being more than and consume and occur that Node station collapses
Phenomenon.
When each Node station has loaded a unit, the client of real-time informing request GIS data is needed to carry out
The reading of described unit and display, described client can complete callback mechanism by registered callbacks GIS data,
If i.e. there being the unit GIS data of renewal, just described client being adjusted back, notifying that described client carries out reality
Time read.Such as, in one embodiment, before step S110, it is also possible to include step: receive GIS
Data load requests, and generate GIS data allocation list according to described request dynamic；
If each Node station completes to load any cell of described GIS data, described GIS data allocation list updates,
The described GIS data allocation list that retrieval updates, reads and shows corresponding GIS data, it is achieved that GIS data
Real-time and Dynamic update, the present invention retrieves the described GIS data allocation list of renewal in a grid formation.
In one embodiment, described GIS data load request includes increasing GIS data unit requests, increasing
Add any one or two kinds of the partial region data request of GIS data unit.Such as, request is read some
The GIS data of figure layer, or the GIS data in each figure layer current window region of request reading, or request reading Mus
The GIS data of the input equipment chosen area such as mark, or by input equipment operation camera and LOD (Levels of
Details) request GIS data etc..
In one embodiment, if GIS data is vector data, lossy compression method can be used and round method
The GIS data being loaded into internal memory is compressed.Need to decompress from Node station internal memory reads when.
Wherein lossy compression method utilizes the characteristic that the mankind are insensitive to some frequency content in image or sound wave, it is allowed to pressure
Compression process loses certain information, although initial data can not be recovered completely, but the part lost is right
Understand that the impact of original image is reduced, but brought much bigger compression ratio.Lossy compression method and round method can
To be obtained by mode well known in the prior art.Be compressed described GIS data being to line entity and
The GIS phasor coordinate data of face entity are compressed.
Based on same inventive concept, present invention also offers a kind of adding based on the GIS data spelling wall system carries
Put, below in conjunction with the accompanying drawings the detailed description of the invention of apparatus of the present invention is described in detail.
As it is shown on figure 3, a kind of GIS data charger based on spelling wall system, including:
Distributed server 100, for calculating the distributed of each Node station 200 according to the Node station quantity preset
Cached parameters and adjust in real time the distributed caching parameter of Node station 200 in GIS data loading procedure, its
Described in distributed caching parameter comprise the element number of GIS data and the scope of data of each unit of request；
The each Node station 200 being connected with described distributed server, for according to corresponding distributed caching parameter
Described GIS data is loaded into the internal memory of each Node station 200 and is compressed；
The each client 300 being connected with described distributed server 100, for completing to add when each Node station 200
When carrying any cell of described GIS data, it is used for reading and show corresponding GIS data.
Described distributed server 100 adjusts the distributed caching parameter of Node station in real time and reaches optimality
Can have numerous embodiments, such as, in one embodiment, described distributed server 100 is at GIS number
May include that according to the step adjusting Node station distributed caching parameter in loading procedure in real time
Monitor the GIS data loading speed of each Node station, adjust in real time accordingly according to GIS data loading speed
The distributed caching parameter of Node station；Such as, if Node station loading speed is very fast, then distributed caching is adjusted
Parameter makes it load more GIS data；If Node station loading speed is relatively slow, then adjust distributed caching ginseng
Number makes it load less GIS data；If Node station loading speed is 0, such as, break down, then add new
Node station substitute described Node station, be new joint by the distributed caching parameter adjustment of described Node station simultaneously
The distributed caching parameter etc. of some machine；
Monitor the idle condition of each Node station, if Node station is idle condition, adjust the most distributed in good time
Cached parameters makes described Node station load GIS data, to assist other Node station to complete the GIS data of request
Loading, it is ensured that the GIS data of Node station loads and reaches optimum performance；Or the GIS that described Node station preserved
Data Serialization, preserves into local data, the convenient demand that GIS data loads later；Wherein by the free time
The GIS data serializing that some machine preserves occurs after it loads new GIS data, if i.e. need not sky
Not busy Node station loads new GIS data, then the GIS data preserved by described Node station serializes；
Monitor the internal memory of each Node station, if Node station memory consumption is relatively big, increases new Node station and adjust in real time
Whole corresponding distributed caching parameter, or the GIS data of described Node station internal memory is carried out IO write, in release
Deposit space, prevent from producing being more than and consume and Node station collapse phenomenon occurs.
In one embodiment, described distributed server 100 is additionally operable to receive GIS data load request,
And generate GIS data allocation list according to described request dynamic；
If each Node station completes to load any cell of described GIS data, described GIS data allocation list updates,
The described GIS data allocation list that retrieval updates, reads and shows corresponding GIS data, it is achieved that GIS data
Real-time and Dynamic update, the present invention retrieves the described GIS data allocation list of renewal in a grid formation.
In one embodiment, described GIS data load request includes increasing GIS data unit requests, increasing
Add any one or two kinds of the partial region data request of GIS data unit.Such as, request is read some
The GIS data of figure layer, or the GIS data in each figure layer current window region of request reading, or request reading Mus
The GIS data of the input equipment chosen area such as mark, or by input equipment operation camera and LOD (Levels of
Details) request GIS data etc..
In one embodiment, if GIS data is vector data, Node station 200 can use lossy compression method
With rounding method, the GIS data being loaded into internal memory is compressed.From Node station 200 internal memory reads when
Needs decompress.Lossy compression method and round method and can be obtained by mode well known in the prior art.
In order to be more clearly understood from the detailed description of the invention of apparatus of the present invention, below in conjunction with a specific embodiment
It is described in detail.
Client 300 request of loading figure layer 5 and the GIS data of figure layer 6；
Distributed server 100 generates GIS data allocation list, and root according to the request dynamic of client 300
The distributed caching parameter of each Node station 200, the most each Node station network is calculated according to default Node station quantity
Connect, communication can be carried out each other；
Client 300 registered callbacks GIS data completes callback mechanism；
According to corresponding distributed caching parameter, each Node station loads long-range GIS data, and is loading
During, distributed server 100 adjusts the distributed caching parameter of each Node station in real time and reaches most preferably
Performance；
If each Node station 200 completes to load a figure layer, such as figure layer 5, described allocation list updates, distributed
Client 300 is adjusted back by server 100 according to the state of described allocation list；
Client 300 retrieves the allocation list index of GIS data, the figure directly read from Node station internal memory
Layer data；
The figure layer data stream read is analyzed by client 300, and the described figure layer data stream of real-time display also can
Depending on changing the result that display is analyzed.
Each Node station 200 often completes to load a figure layer, and client 300 just reads according to above-mentioned steps and aobvious
Show the data stream of described figure layer, until the GIS data of request of loading all shows.
Other technical characteristic of apparatus of the present invention is identical with the inventive method, does not repeats them here.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed,
But therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that, for this area
Those of ordinary skill for, without departing from the inventive concept of the premise, it is also possible to make some deformation and
Improving, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be with appended
Claim is as the criterion.
Claims (10)
1. one kind based on the GIS data loading method spelling wall system, it is characterised in that include step:
The distributed caching parameter of each Node station is calculated according to default Node station quantity, wherein said distributed
Cached parameters comprises the element number of the GIS data of request and the scope of data of each unit, and described unit is number
The unit shown according to independent body, described unit includes figure layer；
According to corresponding distributed caching parameter, described GIS data it is loaded into the internal memory of each Node station and carries out
Compression, adjusts the distributed caching parameter of Node station in GIS data loading procedure in real time；
If each Node station completes to load any cell of described GIS data, read and show corresponding GIS data.
It is the most according to claim 1 based on the GIS data loading method spelling wall system, it is characterised in that
The step adjusting Node station distributed caching parameter in GIS data loading procedure in real time includes:
Monitor the GIS data loading speed of each Node station, adjust in real time accordingly according to GIS data loading speed
The distributed caching parameter of Node station；
Monitor the idle condition of each Node station, if Node station is idle condition, adjust the most distributed in good time
Cached parameters makes described Node station load GIS data or the GIS data serializing preserved by described Node station；
Monitor the internal memory of each Node station, if Node station memory consumption is relatively big, increases new Node station and adjust in real time
Whole corresponding distributed caching parameter or the GIS data to described Node station internal memory carry out IO and write.
It is the most according to claim 1 based on the GIS data loading method spelling wall system, it is characterised in that
Before the step of the distributed caching parameter calculating each Node station according to default Node station quantity, also include step
Rapid: to receive GIS data load request, and generate GIS data allocation list according to described request dynamic；
If each Node station completes to load any cell of described GIS data, described GIS data allocation list updates,
The described GIS data allocation list that retrieval updates, reads and shows corresponding GIS data.
It is the most according to claim 3 based on the GIS data loading method spelling wall system, it is characterised in that
Described GIS data load request includes increasing GIS data unit requests, the part of increase GIS data unit
Any one or two kinds of area data request.
5. according to the GIS data loading method based on spelling wall system described in Claims 1-4 any one,
It is characterized in that, if GIS data is vector data, uses lossy compression method and round method to being loaded into internal memory
GIS data be compressed.
6. a GIS data charger based on spelling wall system, it is characterised in that including:
Distributed server, for calculating the distributed caching ginseng of each Node station according to the Node station quantity preset
Number and the real-time distributed caching parameter adjusting Node station, wherein said distribution in GIS data loading procedure
Formula cached parameters comprises the element number of the GIS data of request and the scope of data of each unit, and described unit is
The unit that Dynamic data exchange tissue shows, described unit includes figure layer；
The each Node station being connected with described distributed server, being used for will according to corresponding distributed caching parameter
Described GIS data is loaded into the internal memory of each Node station and is compressed；
The each client being connected with described distributed server, for completing to load described GIS when each Node station
During any cell of data, read and show corresponding GIS data.
It is the most according to claim 6 based on the GIS data charger spelling wall system, it is characterised in that
Described distributed server adjusts the distributed caching parameter bag of Node station in GIS data loading procedure in real time
Include:
Monitor the GIS data loading speed of each Node station, adjust in real time accordingly according to GIS data loading speed
The distributed caching parameter of Node station；
Monitor the idle condition of each Node station, if Node station is idle condition, adjust the most distributed in good time
Cached parameters makes described Node station load GIS data or the GIS data serializing preserved by described Node station；
Monitor the internal memory of each Node station, if Node station memory consumption is relatively big, increases new Node station and adjust in real time
Whole corresponding distributed caching parameter or the GIS data to described Node station internal memory carry out IO and write.
It is the most according to claim 6 based on the GIS data charger spelling wall system, it is characterised in that
Described distributed server is additionally operable to receive the GIS data load request of client, and moves according to described request
State generates GIS data allocation list；
If each Node station completes to load any cell of described GIS data, described distributed server updates institute
State GIS data allocation list, the described GIS data allocation list that client retrieval updates, read and show corresponding
GIS data.
It is the most according to claim 8 based on the GIS data charger spelling wall system, it is characterised in that
Described GIS data load request includes increasing GIS data unit requests, the part of increase GIS data unit
Any one or two kinds of area data request.
10. according to the GIS data charger based on spelling wall system described in claim 6-9 any one,
It is characterized in that, if GIS data is vector data, Node station uses lossy compression method and rounds method to loading
GIS data to internal memory is compressed.
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| CN104007948B (en) * | 2014-05-23 | 2017-06-13 | 广东威创视讯科技股份有限公司 | Method and device based on the visualization display of three-dimension GIS mass data Distributed Calculation |
| CN104065953B (en) * | 2014-06-27 | 2017-01-04 | 广东威创视讯科技股份有限公司 | The method and device controlled based on the visualization display of display device multi views |
| CN104391947B (en) * | 2014-12-01 | 2017-11-21 | 广东电网有限责任公司清远供电局 | Magnanimity GIS data real-time processing method and system |
| CN105278909B (en) * | 2015-11-12 | 2018-05-22 | 广东威创视讯科技股份有限公司 | More GIS display ends icon data display methods and system |
| CN111522596A (en) * | 2020-03-25 | 2020-08-11 | 平安城市建设科技(深圳)有限公司 | Scene preloading optimization method and device, electronic equipment and storage medium |
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