CN102999592A - B/S architecture based global Argo multi-source marine data management and visualization system and method - Google Patents
B/S architecture based global Argo multi-source marine data management and visualization system and method Download PDFInfo
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Abstract
The invention discloses a B/S architecture based global Argo multi-source marine data management and visualization system and a method and belongs to the field of internet information exchange technology and computer visualization. The system is used for a user to inquire and acquire global marine data in a database management way through three-dimensional visualization by adopting the Web-GIS technology and carry out the analysis of visualization on the multi-source marine data including the mode data and the remote sensing data. The system is completely based on the B/S architecture design and comprises a massive multi-source spatial data storage tank module, a visualization function server module, a client-side interaction and visualization control piece module and a coordinate conversion module. The advanced system makes up the defects of the existing multi-source marine data management system and realizes the massive multi-source data storage, the Argo data inquiring and on-line processing, the three-dimensional data visualization, the real-time interactive analysis and other key technologies by adopting the three-dimensional visualization means of the Web-GIS.
Description
Technical field
The present invention relates to the visual field in internet information interaction technique and ocean, more particularly, relate to a kind of management of the multi-source oceanographic datas such as global Argo buoy and Visualization system and method based on the B/S framework.
Background technology
Along with the extensive of Internet popularized and be widely used, the B/S Framework Software becomes the first-selected architecture of current software gradually as a kind of improvement to the C/S structure.
International Argo plan is since formal enforcement in the end of the year 2000, have in the world 35 countries and group in the Atlantic, the marine site such as the Indian Ocean and Pacific Ocean thrown in about 8700 Argo profile buoy successively, end in by the end of July, 2012, Argo profile buoy in whole world normal operation adds up to 3561, and these buoys can provide sum nearly more than 10 ten thousand ocean temperatures and salt profile data every year.The ocean changes with the anomalous weather situation close contacting, the Argo plan is intended to fast, collects ocean temperature, the salt profile data on global ocean upper strata accurately, on a large scale, to improve the precision of climatic prediction, the threat of effectively defending the day by day serious climate damage in the whole world to cause to the mankind.
Management for Argo data and other multi-source oceanographic datas mainly contains CD managing and network data library management dual mode, and the former has fragile and the high shortcoming of handling cost, can't satisfy the scientific research needs.And domestic Argo multi-source Network Database Management System adopts the C/S structure more, and client maintenance and upgrade cost are high, and extension of network is poor, can't satisfy the user by network inquiry, obtain the demand with three-dimensional visible fractional analysis multi-source oceanographic data.Only a few does not possess multi-source data analysis and three-dimensional visualization ability based on oceanographic data management and the Visualization Platform of Web, can only be to single data management and simple two-dimensional visualization.
Divide according to data source, oceanographic data can be divided into remotely-sensed data, station data, sea survey data, basic map data and numerical products etc.Because data source is different, so that will carry out data sharing between different department or the industry and integratedly bring very big inconvenience.Therefore, explore unified spatial data structure, design a kind of Spatial Data Model and data layout thereof that can merge several data, development realizes that the storage system of multisource data fusion is particularly important.Pass through data fusion, can with the space object difference that multi collect produces in various Spatial Data Model and identical data model geometric position repeatedly spatial data structure, geometric position and the key element attribute etc. that produce of digitizing and abstract unify to process, realize to the full extent the fully conversion of multiple data sources.
Summary of the invention
For solving an above-mentioned difficult problem, the present invention proposes a kind of management of the multi-source oceanographic datas such as global Argo buoy and Visual Expression Method based on the B/S framework, and designed on this basis a network visualization system.The present invention can inquire about whole world actual measurement Argo data in real time accurately, and other can be comprised that the multi-source data of mode data, remotely-sensed data etc. makes three-dimensional visualization,
And analyze impact between them.
Global Argo multi-source oceanographic data management under the B/S framework comprises following part at least with the realization of visualization system: a cover magnanimity multi-source Spatial Data thesaurus, a visualization function server, one cover client reaches the visual control module alternately, a cover coordinate transferring.
Described magnanimity multi-source Spatial Data thesaurus, application data base Clustering and submeter technology have solved the storage problem of mass data with magnanimity multi-source data and the unified management of Argo data, and realize quick condition query response;
Described visualization function server is preserved the file index in the multi-source Spatial Data thesaurus, and by net end interface reading out data and generate drawing data from multi-source Spatial Database;
Described client reaches the visual control module alternately, and adopt senior Web-GIS design, utilize the ActiveX technology, be control with module integrations such as GIS function, Argo data and other multi-source data visualization functions;
The geographical elevation DEM image that described coordinate transferring will create by Web-GIS and reach alternately the visual rendering result of multi-source data that visual control realizes by the family end and carry out the coordinate correspondence.
Global Argo multi-source oceanographic data management under this B/S framework is applied in the said system with method for visualizing, and the method comprises:
(1) according to the storage demand of magnanimity multi-source data, adopts data-base cluster technology or suitable database method to set up;
The multi-source oceanographic data that (2) will comprise the Argo data carries out zoning design;
(3) select suitable visualization function server and relevant GIS service;
(4) network port is set, the definition data transport service;
(5) write the Active plug-in unit, carry out the client exploitation;
(6) create altitude figures and three-dimensional visualization drawing data coordinate system, formulate the corresponding criterion of coordinate system.
Beneficial effect of the present invention:
Client computer load has been simplified in this invention greatly, only need disposable installation function plug-in unit to realize, maintainability and favorable expandability, difficulty and the cost of User Exploitation and maintenance have been reduced, the demand of three-dimensional visualization when having satisfied the user for Argo data and other multi-source oceanographic data Internet Transmissions and network implementation.Solve the storage administration of magnanimity multi-source data and a three-dimensional visualization difficult problem, brought into play the effects in ocean and atmospheric science research field such as mode data, remotely-sensed data.
Description of drawings
Fig. 1 is the global Argo multi-source oceanographic data management and visualization system module map under the B/S framework;
Fig. 2 is the global Argo multi-source oceanographic data management and visualization system functional structure chart under the B/S framework;
Fig. 3 is multi-user access Parallel access control mechanism figure;
Embodiment
Function of the present invention can realize in-out-storehouse management and inquiry to the Argo data as shown in Figure 2, can carry out the three-dimensional visible fractional analysis to the multi-source oceanographic data, and can realize the store and management of mass data.For above-mentioned purpose of the present invention, feature and advantage are become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
1. magnanimity multi-source Spatial Data memory pool structure designs and the fast query technology
The data of global ocean Argo buoy observational network are very huge, and annual quantity growth with the GB level, add other mode datas, remotely-sensed data, and data volume can get more and more, and therefore, needs the support of mass memory and fast query technology.And Database Systems are because technical reason, and along with the table record number increases, its inquiry response speed can descend.The data query record can reach millions of to several ten million bars, if do not carry out appropriate design, even under the such large database of Oracle is supported, also can database performance be descended, finally quits work.Therefore, need to seek the support of mass data storage technology.Solve ever-increasing record number on the one hand, guarantee that on the other hand inquiry response speed does not descend in the situation that the record number increases, realize fast response.
(1) massive spatial data storage
Through repeatedly testing, comparing, propose to adopt the data-base cluster technology to solve the storage of mass data.Use this technology, along with the increase of Argo data volume, can set up a plurality of Argo databases at the physical database end, and adopt unified logical name with these physical database clusters together.Adopt unified logical name because database is externally served, the expansion of database has good retractility, can expand when needed the magnanimity storage that guarantees under the record growth.Support magnanimity multi-source oceanographic data for making database, and support greater than the above LOB field data of 4G, the present invention is based on object-oriented thought, also designed and Implemented take the multi-source data engine module of OCI (Oracle Call Internet) technology as the basis, the object of data engine operation is divided into many levels, can not only process the common type field data of non-magnanimity, and support the data manipulation of the above LOB field of 4G, have the advantages such as efficient height, resource occupation are low.
(2) multi-source oceanographic data storage and management
The generation of oceanographic data polyphyly and performance mainly may be summarized to be multi-semantic meaning, multi-space and multiple dimensioned, obtaining means polyphyly, storage format polyphyly etc.Because spatial data, very strong space-time characterisation is arranged, the means of obtaining data are also complicated various, this just forms the raw data of multiple format, adding the marine GIS application system a very long time is in centered by detailed programs in the isolated state of development, a lot of marine GIS softwares have the data layout of oneself, and this is so that multi-source oceanographic data sharing problem becomes particularly outstanding.Shown in Fig. 1 magnanimity multi dimensional space data repository module section, different according to Argo data and other multi-source oceanographic data form, the notebook data thesaurus adopts the storage mode of Oracle and PostGIS comprehensive utilization, the management mode of Direct data access, realize different pieces of information difference storage, the purpose that unified management is called.According to the feature of Argo buoy data and the requirement that realizes system design functions, system database is comprised of buoy Basic Information Table, buoy cross-sectional data table and buoy drift orbit tables of data.In order to improve fast poll response speed, increased relevant dynamic queries view.Direct data access refers to that realization is to the direct access of different data format, access several data form in software systems.Direct data access has not only been avoided numerous data-switching, and certain data layout of access does not require that the user has the host software of this data layout, does not more need this running software in a software.Direct data access provides a kind of more economical and practical multi-source data intergration model.
(3) fast query technology
The response of fast query designs, and has adopted table subregion (partition) technology of Oracle, with the fast poll response that realizes recording more than several ten million bars.Adopt the table partitioning technique, can in very-large database (VLDB), will show greatly and the form of index by subregion is divided into some less, manageable fritters, but each subregion again Further Division is less child partition (sub partition), structure according to buoy observation data record, buoy ID number, these two parameters of time are made as the table partition key, thereby the table of several ten million a bars record is divided into the partition table that is easy to manage.This subregion is transparent for using, and, carry out subregion by his-and-hers watches, not only can reduce the possibility of corrupted data, each subregion can also independent backup and is recovered, and has strengthened the manageability of database, and what is more important can the distribution of control partition on hard disk, with balanced I/O (I/O), improve the performance of database.
2. visualization function server design
Shown in Fig. 1 visualization function server section, this module is comprised of Web service module and WebGIS service module, the Web service module is responsible for service request and the work for the treatment of of Argo data and other multi-source oceanographic datas, and the WebGIS service module is responsible for inquiry and the spatial analysis of other multi-source oceanographic datas and GIS data.Geoserver is the core of whole WebGIS service, server is after accepting user's request, by database interface access multi-source Spatial Data thesaurus, according to WMS (Web MaP Service) or WFS (Web Feature Service) agreement the data communication device that returns is crossed Open Layers and play up output with the form of grid or vector to browser.The J2EE mode development is all adopted in all services, and is deployed in the J2EE containers such as Tomcat or JBoss.Jointly formed by the GeoWebCache module and the file service module that are deployed in the J2EE container.GeoWebCache is a project of increasing income that adopts Javaservlet to realize buffer memory WMS Title, and purpose is in order to alleviate the working load of Geoserver server, to realize that better user experiences.
3. client interactive visual control exploitation
(1) client interaction design and user access control
The present invention adopts the ActiveX technology, with the GIS function, the Argo data visualization shows, multi-source oceanographic data visualization display, the module integrations such as man-machine interaction processing are control, ActiveX control in the client software obtains Query Result by sending relevant querying command to the database access engine middleware, and pass to client software so that tcp data is streamed through network, form visual product in the client analysis, take full advantage of the CPU processing power of active client machine, alleviate the data processing work amount of server, the groundwork that guarantees server end is that the data query ability is unaffected, thereby improves the performance of whole system.Wherein client and server interface and Multi-Client Concurrency Access are the cores of network system.
In the data-interface of client and server, finish the mutual of data by command mode, user end to server sends relevant order, and server return result or error message are as response.When client is got data and since server can echo command type, the processing that client can be correlated with according to echo command.
As shown in Figure 3, the realization of the Multi-Client Concurrency Access mechanism of server end and thread monitor process when carrying out database access, by the Relational database method of operating in the ActiveX control, transmit relevant query statement to database access engine with client.Middleware program is responsible for the instruction decipher and is automatically enabled corresponding process and finish database manipulation.Because middleware must can be realized the Multi-Client Concurrency Access ability, adopts in design multithreading to realize.
(2) three-dimensional visualization service
Multi-source oceanographic data three-dimensional visualization method is for the demand of oceanographic data research and analysis, a series of visual analysis methods towards oceanographic data have been proposed, comprise dot pattern, ray mode, surface model, bulk-mode and time series analysis etc., the gordian techniquies such as contour tracing, contour surface generation, profile drawing, volume drawing are made further research and realize, and be optimized at aspects such as GPU parallel computation, rendering efficiencies according to the visual characteristics in ocean.For different data sources, system adopts different analytical approachs.For example for buoy data and boat measurement data, generally adopt the mode of dot pattern or dot pattern and ray mode combination to analyze, generally adopt ray mode and surface model analysis etc. for remotely-sensed data.For the problem of traditional oceanographic data visualization system in the existence of the aspects such as data visualization method, optical projection system precision, user interactions, this module is based on OpenGL three-dimensional picture Rendering, carry out based on three-dimensional ocean visually, make up oceanographic data three-dimensional visualization module.Aspect method for visualizing, classify according to research object otherness of dimension in the Euclidean space, it is divided into following a few class: the face of the point of zero dimension, the line of one dimension, two dimension, three-dimensional body, and the oceanographic data visual analyzing concepts such as point pattern analysis, ray mode analysis, surface model analysis, bulk-mode analysis have been proposed thus, to represent each research object in depth and temporal situation of change.For different oceanographic data forms, adopt different visual means.For example, can adopt the line of one dimension and sea temperature that three-dimensional body shows respectively simple layer to change and multilayer sea temperature changes to single Argo buoy data visualization, can adopt two-dimentional face to represent the ocean attribute change etc. of zones of different to the Global Sst raster data.
4. coordinate transferring exploitation
5. in visual analyzing, the geographic map layer taken and the three-dimensional visualization figure layer of generation need to be plotted on the screen, inevitably between geographic coordinate and screen coordinate, change, the transfer principle of coordinate is: center and the visual field central point of view are matched, then a given geographic coordinate, just calculate according to the shift ratio chi of this coordinate and visual field central point and can obtain screen coordinate, vice versa.At first, how many body of a map or charts of known current demonstration is, namely H, W, (x0, y0) are known; Then, the size of known current screen painting canvas, i.e. known H ', W '; So just can obtain map reference (x, y) to screen coordinate (x ', y ') conversion formula, the map reference of each key element is transformed into screen coordinate, and be played up out.In the situation that canvas size does not have to change (H ', W ' constant), along with the amplification of map, dwindle, the operation such as translation, body of a map or chart changes constantly, namely H, W, (x0, y0) are changing, also thereupon the changing of conversion formula.For the singularity of oceanographic data, with the geographic coordinate in the coordinate transferring, be converted to the longitude and latitude coordinate and can realize that coordinate is corresponding.
Claims (6)
1.B/S global Argo multi-source oceanographic data management and visualization system under the framework, it is characterized in that this system comprises: a cover magnanimity multi-source Spatial Data thesaurus, a visualization function server, one cover client reaches the visual control module alternately, a cover coordinate transferring; Wherein:
(1) magnanimity multi-source Spatial Data thesaurus module is used for the multi-source datas such as management Argo data and raster data, boat measurement data, remotely-sensed data, comprises in-out-storehouse management, list management etc.;
(2) visualization function server module is used for to the spatial database request msg, and carries out real-time visual and calculate;
(3) client reaches the visual control module alternately, is used for visualized data is carried out three-dimensional rendering, and rendering result is carried out coordinate transformation, will the results are shown on the browser.
2. system according to claim 1, it is characterized in that, described magnanimity multi-source Spatial Data thesaurus module is responsible for dividing tabulation to preserve to magnanimity Argo data and multi-source oceanographic data, the visualization function server module proposes request of data to magnanimity multi-source Spatial Data thesaurus, and the result carried out three-dimensional visualization, the visualization process data communication device is crossed network interface submit to client and reach alternately visual control and show.
3. system according to claim 1, it is characterized in that, described magnanimity multi-source Spatial Data thesaurus module comprises mass data storage, be used for store and management magnanimity Argo data, reach the multi-source oceanographic data, realize the storage of mass data orderliness by data-base cluster technology and partitioned mode.
4. according to claim 1 system is characterized in that described visualization function server module comprises the visualization function server, be used for data and process and generate drawing data, and user's classification is held your noise should different service processes.
5. according to claim 1 system is characterized in that described client reaches the visual control module alternately, is used for realizing playing up the control of data three-dimensional visual and man-machine interaction.
6. according to claim 2 method may further comprise the steps:
(1) according to the storage demand of magnanimity multi-source data, adopt the data-base cluster technology and suitable or and the database method to set up;
The multi-source oceanographic data that (2) will comprise the Argo data carries out zoning design;
(3) select suitable visualization function server and relevant GIS service;
(4) network port is set, the definition data transport service;
(5) write the Active plug-in unit, carry out the client exploitation;
(6) create altitude figures and three-dimensional visualization drawing data coordinate system, formulate the corresponding criterion of coordinate system.
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