空间信息共享与互操作技术---第三讲PPT课件

.,1,WMS查询实例,/cgi-bin/NWGISS/NWGISS?WMTVER=1.0.0&REQUEST=capabilities,http:/dial.eoc.nasda.go.jp/cgi-bin/dib/wgiss?WMTVER=1.0.0&REQUEST=capabilities,.,2,WMS查询实例,/cgi-bin/NWGISS/NWGISS?WMTVER=1.1&REQUEST=map&BBOX=-120.093803%2C21.792076%2C90.692970%2C42.964756&WIDTH=271&HEIGHT=406&SRS=EPSG%3A4326&LAYERS=mod2%3ASWATH%3AMODIS_SWATH_Type_L1B%3AHeight%3A0&STYLES=Histogram+equalization%3ARainbow256&FORMAT=GIF&BGCOLOR=0 xFFFFFF&TRANSPARENT=TRUE&EXCEPTIONS=XML,.,3,Capabilities.xml,GetCoverageNASAWMT2WebServer:8080/cgi-bin/dib/wcshdfeos?nonenone,.,4,实现技术,根据国际标准WebMapServiceInterface制订出基于Web的地图服务规范，用GeoStar,GeoSurf,SuperMap,MapGIS,Arc/Info,MapInfo软件上实现实现异构电子地图的网络共享集成以及Web服务,.,5,.,6,(2)基于Web的地理覆盖的服务规范,在网络环境下查找地理覆盖数据（影像、DEM等）服务网站，发出请求，服务器将地理覆盖数据直接传送到客户端。,.,7,WebCoverageServices(WCS)Interfaces,GetCapabilitiesGetCoverageDescribeCoverageType,.,8,GetCoverage,DataLayerNameFormat(HDFEOS,NITF,GEOTIFF)SpatialReferenceSystemMapBoundingBoxOtherInformation(Dimensionsubsetting,SpatialResampling),.,9,实现技术,根据国际标准WebCoverageServiceInterface制订出基于Web的要素服务规范，用GeoStar等软件实现实现了地理覆盖层数据的网络共享与互操作以及Web服务,.,10,.,11,(3)基于Web的地理要素服务规范,在网络环境下查找地理要素（矢量数据库）服务网站，发出请求，服务器将矢量数据转换成GML格式数据，传送到客户端。需要时可进行在线编辑。,.,12,实现方法,根据国际标准WebFeatureServiceInterface制订出基于Web的要素服务规范，用GeoStar,GeoSurf,SuperMap,MapGIS,Arc/Info,MapInfo软件实现实现地理要素的网络共享与互操作以及Web服务,.,13,WFSReview-Application,.,14,WFSReviewWFSinreallife,.,15,.,16,.,17,多系统多标准多数据源空间数据集成,.,18,五、地理空间信息网络服务技术,.,19,1、地理数据服务2、地理信息处理服务3、组合服务的实现4、OGC基于Web的地理信息服务技术,.,20,注册、目录管理、分发,.,21,.,22,1、地理空间数据服务,.,23,WFSReview-History,TheWebFeatureServerhasbeendefinedwithintheOpenGISInteroperabilityProgramduringtheWMT-2Testbedin2000.TheprimarygoalwastoextendtheWMScapabilitiesofGetFeatureInfotogiveafullaccesstothevectorinformationrepresentedonmaps.Thisgoalhasbeachievedandhasbeenexceeded.AdoptedasanOpenGISimplementationspecificationinSeptember2002.,.,24,WFSReview-Definition,“TheWFSspecificationdefinesawebinterfacesfordescribingdatamanipulationoperationsofgeographicfeatures”Datamanipulationoperationsincludetheabilityto:GetorQueryfeaturesbasedonspatialandnon-spatialconstraintsCreateanewfeatureinstanceDeleteafeatureinstanceUpdateafeatureinstance,WFS-T,.,25,WFSReview-Definition,AWFSmustimplementthefollowingoperations:GetCapabilitiesDescribeFeatureTypeGetFeatureAWFSmayimplementthefollowingoperations:TransactionLockFeature,.,26,WFSReview-Definition,ThepurposeoftheDescribeFeatureTyperequestistodescribeoneormorefeaturetypesservicedbyaWFSFeatureTypesmustbedescribedusingaGML(i.e.XMLSchema)ThismeansthattheoutputofaDescribeFeatureTyperequestisanXML-SchemadocumentFeaturesmaybedescribedusingotherschemalanguagesTheidentifierforthoselanguagesmustbeadvertisedinthecapabilitiesdocument,.,27,WFSReview-Definition,TheGetFeaturerequestisacontainerforoneormorequeryoperationsAQueryoperationsallowsfeaturesofaparticularfeaturetypetoberetrieved.AQueryiscomposedoftwosetsofelementsAlistofproperties(thedefaultistofetchallofthem)AFilter(orpredicate)thatidentifiesthesetoffeatureinstancestoretrieve,.,28,WFSReview-Definition,TheTransactionoperationisusedtocreate,modifyanddeletefeatureinstancesTheTransactionoperationisacontainerforoneormoreInsert,UpdateandDeleteoperationsFeatureinstancesareencodedinGMLAFiltercanbeusedtodefinethescopeoftheoperation,.,29,WFSReviewWFSandGML,GML(ISO19136)istheXMLencodingofgeographicfeaturesthathasbeenselectedtobeusedbyWFS.GMLplaystwoimportantroles,encodingandmodeldefinition(troughGMLapplicationschemas)GMListheonlyencodingformataWFSMUSTsupporttobecompliant,.,30,WFSReviewWFSandGML,Innowayisittheonlyoneallowed,wehaveexamplesofWFSusingshapefiles,JavaRMI,Binaryencoding(eitherBinaryXMLoranother),ButallofthemalsosupportGMLforrealinteroperability.WFSmigrationtoGML3willrequirethedefinitionofaProfileandanApplicationSchemaforWFS.,.,31,WFSReview-Application,.,32,WFSReviewWFSinreallife,.,33,.,34,.,35,.,36,全国1:100万基础地理数据在线共享服务,.,37,.,38,.,39,2、地理信息处理功能服务,.,40,1、服务内容,地理信息人机交互服务地理模型/信息管理服务地理工作流/任务管理服务地理信息处理服务地理信息处理服务空间处理地理信息处理服务专题处理地理信息处理服务时间处理地理信息处理服务元数据处理地理信息通讯服务地理信息系统管理服务,.,41,1）地理信息人机交互服务,目录浏览器地理信息浏览器地理信息电子表格浏览器服务编辑器链定义编辑器工作流制定管理器地理要素编辑器地理要素符号编辑器要素综合编辑器地理数据结构浏览器,.,42,2）地理信息模型