CN1787521B - Method for registration of web covering service coordinate based on web map service - Google Patents
Method for registration of web covering service coordinate based on web map service Download PDFInfo
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- CN1787521B CN1787521B CN 200510020011 CN200510020011A CN1787521B CN 1787521 B CN1787521 B CN 1787521B CN 200510020011 CN200510020011 CN 200510020011 CN 200510020011 A CN200510020011 A CN 200510020011A CN 1787521 B CN1787521 B CN 1787521B
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Abstract
This invention relates to a configuration method for the Web covering service coordinate based on the Web map service, which applies the conversion mode of continuous points by taking the reference coordinate supported by the WMS service end as the primary standard to convert WCS service data under different reference systems to the reference coordinate system with the same data to WMS service and bring the geographical data got from the geographical service information of different protocols into a unified frame to integrate multi-protocol geographical service from different stops, plants, services, data sources and different space reference systems on the browser.
Description
Technical field
The present invention relates to the network geographic information service system, be specifically related to geography information Web service technology crossing domain, particularly realize sharing and integrated method between the geographic information services of different agreement.
Background technology
Can predict,, how realize that sharing with integrated between the geographic information services of different agreement will become the problem that the geography information field presses for solution along with the development of geographic information services.
At present, OGC Web service work group just is being devoted to set up the Web service standard of open geographic information, purpose is to wish that proposing one can evolve, based on various standards, can seamless integrated various online spatial manipulation and the framework of location-based service, be OWS (OGC Web Services), make that treatment system can be undertaken alternately by XML and HTTP technology between distributed space, and be various online spatial data resource, spatial information from transducer is handled service and location-based service, discovery based on Web, visit, integrate, analyze, utilize and the visual interoperability framework that provides.Three geographic information services Web Map Services (WMS) of its proposition, Web Feature Service (WFS), Web cover the interface definition comparative maturity of service (WCS), can realize sharing of GIS spatial data under the Web environment.The data that the utilization of Web Map Services has geospatial location information generate map.The Web Feature Service is returned the GML coding of geographic element level, and transaction operations such as increase to geographic element, renewal, deletion are provided.The Web service of covering can provide cover data multiple dimensioned, different time sections.
Current domestic and international many GIS software vendor provides the support to WMS one after another in its product, the user can set up various Web Map Services easily, for example MapXtreme4.5.7 can be issued as WMS to the figure layer of managing in the ground plan definition file as resource, ArcIMS9.0 can be issued as the WMS service to ImageServer by the WMSConnector connector, can be issued as the WFS service to FeatureServer by the WFSConnector connector, but lack the integrated client of service collaboration between a plurality of business mens, and the supporting dynamics to WFS and WCS service is not enough, this is because integrated some technical problems that also exist of this three mainly show: also do not have unified service abstraction standard; There is not unified interface to realize; Different services lack effective Coordinate Conversion mechanism when stack; Lack the active data compression mechanism, the efficient of service is comparatively low; The performance mechanism of different vendor's data, services varies.
Serve integrated solution integrated and client-based integrated dual mode based on server end is arranged, based on server end integrated owing to relate to a series of still unsolved difficult problems such as the calling automatically of intellectual search, service, result's the automatic merging of service and server end visual representing, client-based integrated research at present many, but great majority are integrated based on desktop application.For integrated, still there is not ripe report based on the service of Web browser client.
At present, the integrated technology of multi-protocols geographic information services is also very immature, main cause comprises: do not have in various geographic information services under the situation of common reference frame, WFS service data under the different referentials, WCS service data, WMS service data etc. can't be transformed under the identical reference frame, therefore, how the service data with the different spaces reference frame is transformed into identical georeferencing coordinate system, and considering the efficiency and precision of Coordinate Conversion, is one of integrated key technology of multi-protocols geographic information services.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of Web based on the Web Map Services to cover service coordinate method for registering, this method is a benchmark with the reference coordinate of WMS service end support, WCS service data under the different referentials is transformed under the identical reference frame with the WMS service data, and the integrated multi-protocols geographic information services that comes from different websites, different vendor, different service, different pieces of information source, different spaces referential creates conditions on the Web browser in order to be implemented in.
The present invention solves the problems of the technologies described above the technical scheme that is adopted:
Web based on the Web Map Services covers service coordinate method for registering, and it comprises:
(1) is used for the value of the georeferencing of Web Map Services is stored in as source coordinate system parameter the step of memory;
(2) be used for the value of the georeferencing that obtains of ability description of the service of covering from Web is stored in step the memory as the target-based coordinate system parameter;
(3) with three parametric methods or seven ginseng methods target-based coordinate system parameter and source coordinate system parameter are carried out parameter calculation, the corrected value of output coordinate;
(4) be used for the continuous cover data obtained from the Web service of covering, take out the control point coordinate figure as input, after adding the corrected value of coordinate, the new coordinate figure of controlled point also is stored in step in the memory;
(5) according to the computation model function that covers continuously and control point to the data processing that resamples, export new continuous cover data.
The value of georeferencing comprises: the value of the number of projection title, projective parameter, the title of projective parameter and projective parameter.
In the such scheme, between step (2) and step (3), also comprise:
Be used for step that target-based coordinate system parameter and source coordinate system parameter are compared, this step can be selected following action:
Target-based coordinate system parameter and source coordinate system parameter matching, the step below finishing;
Or target-based coordinate system parameter and source coordinate system parameter do not match execution in step (3).
Because what the GetMap of WMS request was returned is the picture of having specified forms such as reference frame JPEG, PNG, GIF, can not carry out the coordinate system conversion; And the cover data that the GetCoverage of WCS returns all has reference frame information, can carry out the coordinate system conversion, eliminates the difference between reference frame, realizes the seamless integrated of geodata.Do not have in various geographic information services under the situation of common reference frame, we are benchmark with the reference coordinate of WMS service end support, WCS service data under the different referentials is transformed under the identical reference frame with the WMS service data, and the WCS service data is carried out conversion through the coordinate figure to the control point and to the data processing that resamples.
Interface according to the service of OGC open geographic information, the present invention proposes the method for registering based on the georeferencing of WMS, adopt the coordinate transform pattern of continuity point, reference coordinate with the support of WMS service end is a benchmark, WCS service data under the different referentials is transformed under the identical reference frame with the WMS service data, to include unified reference frame in from the geodata that the geographic information services of different agreements is obtained, integratedly on the Web browser come from different websites for being implemented in, different vendor, different services, the different pieces of information source, the multi-protocols geographic information services of different spaces referential creates conditions.
The advantage of the inventive method also comprises:
(1) resolving of georeferencing, coordinate transform and the continuity point by adopting WMS realized the registration of the geographical cover data of WCS;
(2) transformation parameter that can realize different geographical georeferencings resolves and real-time Coordinate Conversion;
(3) simple, the execution efficient height of the inventive method.
Description of drawings
Fig. 1 covers the georeferencing registration flow chart of service based on WMS for Web
Fig. 2 multi-protocols geographic information services data model figure
Embodiment
The inventive method embodiment as shown in Figure 1, based on the Web covering service coordinate method for registering of Web Map Services, it is characterized in that: it comprises:
(1) is used for the value of the georeferencing of WMS is stored in as source coordinate system parameter the step of memory.
(2) value that is used for the georeferencing that will obtain from the ability description of WCS is stored in step the memory as the target-based coordinate system parameter.
Be used for step that target-based coordinate system parameter and source coordinate system parameter are compared, this step can be selected following action:
Target-based coordinate system parameter and source coordinate system parameter matching, the step below finishing;
Or target-based coordinate system parameter and source coordinate system parameter do not match execution in step (3).
(3) target-based coordinate system parameter and source coordinate system parameter are carried out parameter calculation, corrected value dx, dy and the dz of output coordinate x, y, z with three parametric methods or seven ginseng methods.
(4) be used for serving the continuous cover data of obtaining from the Web covering, take out control point coordinate figure x, y, z as input, behind the corrected value dx, the dy that add coordinate and dz, new coordinate figure x '=x+dx, y '=y+dy, the z '=z+dz of controlled point also is stored in step in the memory;
(5) according to the computation model function that covers continuously and control point to the data processing that resamples, export new continuous cover data.
The value of georeferencing comprises: the value of the number of projection title, projective parameter, the title of projective parameter and projective parameter.
Present embodiment can be realized by special hardware card.
Obtain the descriptor of geographic information services from service end by the GetCapabilties method, purpose is to serving which figure layer that provides, the response format of scope frame, coordinate reference system information and the service support of each figure layer etc. in extracting from descriptor.The GetObject method of WMSBean is selected to send GetMap according to the user and is asked the WMS service end, obtains the grille picture of information such as specified scope frame, coordinate reference system, form, background colour and transparency.The GetObject method of WCSBean sends the DescribeCoverage request of required key element type, service end is returned the detailed XML document of cover data, mainly describe the response format of reference frame, grid structure, time period, compound observation and the support of cover data, sent the cover data that the GetCoverage request obtains specified scope frame, reference frame, time, compound observation and form then.
Behind the coordinate registration by the inventive method, can be the data that obtain from WMS, WCS service as the unified operation of concrete GeoSurfBaseRaster figure layer (WMSLayer and WCSLayer).Data model is inherited from abstract graph layer AbstractLayer respectively and is come as shown in Figure 2, sets up a vector structure to carrying out unified management in the set of abstract graph layer in MapBean.Comprise the realization (as WMSBean) of a Service interface among each AbstractLayer, be used as data set provider and use, the method for the GetObject by the Service interface is obtained data.Contain vector, image and DEM figure layer map thereby in MapBean, generated a width of cloth, and various data are drawn the demonstration that is implemented in client.
The concrete figure layer that obtains in the service to WMS, WCS amplifies, dwindles, the realization class of the Service interface by each figure layer during roam operation sends the GetObject request, change the scope frame of request msg, obtain new data, again data are included in the integrated demonstration of unified reference frame in MapBean.
Raster map layer to the WMS service carries out a query manipulation by send GetFeatureInfo request realization to service end, X, the Y coordinate of the key element of specifying the layer name that will inquire about in request, expressing with pixel and the key element number of returning, service end is returned is the attribute-name of the key element that inquires and the GML document of property value.We respond to resolve to GetFeatureInfo and generate corresponding key element structure set GeoSurfFeatureCollection, have set up the corresponding relation of the attribute name-value pair of key element, have realized the some query function of WMS service data.
Can obtain the cover data of various different sensors, spatial resolution, temporal resolution and spectral resolution from different WCS, and adopt WCSLayer to express.Realization is to the fusion of multi-source cover data, and the fresh information that has been improved will strengthen sharing and excavating function of isomeric data greatly, satisfy user's various demands.When realizing, can be under strict registration to the fusion of multiband remote sensing data in client to image, directly use multi-wavelength data to carry out the pixel fusion related with pixel from the difference service, adopt false color processing, improved visual effect.
The dem data that returns from service end through visualization processing, is handed over the real-time update dem data simultaneously mutually according to user's needs and service end.Client is in flight, it is not disposable will the demonstration in all data importing threedimensional models, can when data volume is big, can cause the client roaming very to be blocked like this, here used the CLOD algorithm, according to the distance of viewpoint and terrain block and the scope at visual angle, part play up visual landform, after viewpoint overshoot scope, from service end request next group data block, in this way, client roaming dimensional topography can become very smooth again.In order to accelerate system response time, in module, all used buffer memory, these buffer memorys can be provided with its size as required, and the user also can cancel some buffer memory by method simultaneously.
Claims (2)
1. the Web based on the Web Map Services covers service coordinate method for registering, and it is characterized in that: it comprises:
(1) is used for the value of the georeferencing of Web Map Services is stored in as source coordinate system parameter the step of memory;
(2) be used for the value of the georeferencing that obtains of ability description of the service of covering from Web is stored in step the memory as the target-based coordinate system parameter;
(3) with three parametric methods or seven ginseng methods target-based coordinate system parameter and source coordinate system parameter are carried out parameter calculation, the corrected value of output coordinate;
(4) be used for the continuous cover data obtained from the Web service of covering, take out the control point coordinate figure as input, after adding the corrected value of coordinate, the new coordinate figure of controlled point also is stored in step in the memory;
(5) according to the computation model function that covers continuously and control point to the data processing that resamples, export new continuous cover data;
The value of georeferencing comprises: the value of the number of projection title, projective parameter, the title of projective parameter and projective parameter.
2. the method for claim 1 is characterized in that: also comprise between step (2) and step (3):
Be used for step that target-based coordinate system parameter and source coordinate system parameter are compared, this step can be selected following action:
Target-based coordinate system parameter and source coordinate system parameter matching, the step below finishing;
Or target-based coordinate system parameter and source coordinate system parameter do not match execution in step (3).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101706809B (en) * | 2009-11-17 | 2012-07-04 | 北京灵图软件技术有限公司 | Method, device and system for processing multi-source map data |
| CN103177103A (en) * | 2013-03-22 | 2013-06-26 | 乌鲁木齐市图示天下软件有限责任公司 | Three-dimensional geographical information system management platform |
| CN103699641A (en) * | 2013-12-24 | 2014-04-02 | 北京易华录信息技术股份有限公司 | Method for accessing different raster map services |
| CN104050869B (en) * | 2014-06-16 | 2017-01-04 | 广州杰赛科技股份有限公司 | GIS map covering is layouted response method and system |
| CN108709561B (en) * | 2018-04-15 | 2020-10-30 | 武汉中海庭数据技术有限公司 | Matching algorithm for different-scale data based on global road network characteristics |
| CN110634156A (en) * | 2019-08-28 | 2019-12-31 | 重庆知行宏图科技有限公司 | Online registration method of indoor plane graph |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1435790A (en) * | 2002-01-30 | 2003-08-13 | 上海众恒信息产业有限公司 | Geographic information system on-line analysis data model and attribute data relating method |
| JP2004101780A (en) * | 2002-09-09 | 2004-04-02 | Hitachi Ltd | Device and method for processing positional coordinate correction |
| KR20040107716A (en) * | 2003-06-12 | 2004-12-23 | 주식회사 케이티 | Geographic information system application method capable of using composite projection and system thereof, and recording medium storing program including the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1435790A (en) * | 2002-01-30 | 2003-08-13 | 上海众恒信息产业有限公司 | Geographic information system on-line analysis data model and attribute data relating method |
| JP2004101780A (en) * | 2002-09-09 | 2004-04-02 | Hitachi Ltd | Device and method for processing positional coordinate correction |
| KR20040107716A (en) * | 2003-06-12 | 2004-12-23 | 주식회사 케이티 | Geographic information system application method capable of using composite projection and system thereof, and recording medium storing program including the same |
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