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GIS interoperability and its architecture

HUANG Yu-xia1 ,CHEN Chang-song2 ,HE Jian-bang1 ( 1 .State Key Lab of Resources and Environemtn Information System,CAS,Beijing 1 0 0 1 0 1 ,China; 2 .Chinese Academy of Surveying and Mapping,Beijing 1 0 0 1 0 1 ,China)  
There are two ways to achieve Geo-information sharing:data transformation and GISinteroperability. Data transformation is an approach which mainly focuses on the data integration,but GISinteroperability implies thatboth data with differentformats and data structures and processing resources related to the data can be sharable.Mutual access to data and processing resources are the basic characteristics of GIS interoperability. GIS interoperability stresses semantic interoperability. Based on client/ server,object-orien- ted,component and driver technology,the architecture of GIS interoperability has been presented.There are many key aspects in this architecture:communication protocol, specification,requests and answers,APIand driver.
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