Study On Application Of The Sharing Of Multi-source Heterogeneous Land Data Based On Cloud GIS

The ministry of Land and Resources puts forward to building a nationwide“cloud of land and resources”,and to spend up the informatization of land and resource.The purpose is to provide coputing,storage,security,and application services for the real estate registration.The datas of land and resources are the most important resource to build the informationnization of land and resources.Land data not only has multiple data source,data format,the space and time,but also has system heterogeneous,structure heterogeneous,grammar heterogeneous and semantic heterogeneous problem.The main way of data sharing in land business is copy mode,such as reported and concurrent.But the ways can’t realize the data real-time sharing.The problem of Multi-source heterogeneous data sharing of land and resource has become a research hotspot in land and resources informatizaion construction.Firstly, the Multi-source heterogeneity of the data of land and resource was analyed.From the data format,file structure,geometry type,the default attribute table structure and data storage to analysis the differences of ArcGIS and SuperMap data,which are commonly used in Guangxi,then,summarizes the technocal difficulties of multi-source heterogeneous data sharing.Integrating the vector data and raster data which commonly used,finally,using ArcSDE+Oracle to put the standardizetion of data in storage.Secondly,research the client aggregation based on Flex,analysis the map document creation,service invocation and service aggregation method in the WebService based on ArcGIS API for Flex and SuperMap iClient for flash, to compare the two interface on service invocaton and service aggregation menthod and verify the result.Thrid,research the mashup based on SuperMap i Serer and verify the aggregation capability of ArcGIS REST.And verify the service,which agent by SuperMap iExpress. Finally, to develop the Guangxi land cloud iPortal customly, under the cloud iPortal of SuperMap offers.And,take a case of data sharing in Fangchenggang,whether the unit at the provincial level and the bureau of land and resource of Fangchenggang can realize the multi-source heterogeneous data real-time sharing through SuperMap,and discusses the problems in the research.The results show that:(1) Base on ArcGIS API for Flex and SuperMap iClient for flash to create Web Service applications can realize multi-source heterogeneous data sharing.ArcGIS API for Flex can call and aggregation the OGC Service,which publish by Supermap iServer,and the results did not appear offser and graphic errors.SuperMap iClient for flash can call and aggregation the OGC Service,which publish by ArcGIS Server,but also can call and aggregation the ArcGIS REST service, and the results did not appear offser and graphic errors too.(2)SuperMap platform is abled to read and share ArcGIS REST service by configurate the service provider in SuperMap iServer,and the results did not appear offser and graphic errors.SuperMap iExpress can agent ArcGIS REST service,the results did not apper graphic errors too.(3)Combinating the function of SuperMap iServer,SuperMap iExpress and SuperMap iPortal to develop Guangxi cloud iPortal.And through service registration, map making way to integrate multiple heterogeneous data,enabling real-time shaing of land multi-source heterogeneous data.