The research of interoperability in spatial catalogue service between CSW and THREDDS

The interoperable sharing of GIS information across organization and communities has become important due to the growing demand of GIS information research and application. In the past several years, interoperability gaps have made cross-protocol and cross-community data access a challenge within the Earth science community. One such gap is between two protocol families developed within the geospatial and Earth science communities. Although it is need to use data from both geoscience community and OGC community, there is no interoperability product between OGC CS/W and THREDDS catalog system. The first problem we faced is the information models heterogeneity between these two catalogues system. This paper will focus on the effort of information model transformation. we will focus on ISO profile in CSW and discuss their interoperability with THREDDS catalogue schema. After that, it describes the detail strategy during the process of element mapping, and illustrates the resolution of the semantic structural heterogeneity and syntax heterogeneity, and the paper also give the method to advance the CSW sever flexibility during the connection with many different profile CSW client.