Comparing Web GIS systems for display and processing geographic information in the context of INDE
This paper presents research in Geographic Information Systems (GIS) interoperability. Also, paper describes our work in development, introduces interoperability framework called GeoNis, which uses new technologies, proposed in this paper, to perform integration task between GIS applications and legacy data sources over the Internet. Our approach provides integration of distributed GIS data sources and legacy information systems in local community environment. The proposed framework uses the ORHIDEA mediation technology to allow communications between GIS applications over the Internet/Intranet. The problem of semantic heterogeneity will be resolved by concept of mediation and ontology.