he focus of the Sava Geoportal is datavisualization and management as well as open web services like WFS and WMS. Once the systemis fully functional, interested parties (government institutions, private entities, general public, etc.)will be able to view available datasets through the Sava Geoportal and its submodules (MetadataCatalogue, Sava HIS). The Sava GIS Geoportal can be reached at: http://savagis.org/. A webapplication for editing, loading and retrieving data and metadata allows registered users to view,visualize, share and retrieve geographic information and datasets stored in the database for thewhole basin. Sava HIS, as the Sava GIS component, represents a tool for collecting, storing, analyzing andreporting sufficiently high-quality hydrological and meteorological data. The overall objective ofSava HIS is to support Sava countries in sharing and disseminating hydrologic and meteorologicaldata, information and knowledgeabout water resources in the SavaRiver Basin. These data andinformation are used by decision-making systems in all aspects ofwater resources management,especially flood risk managementand forecasting, and in a widerange of operational applicationsand research. Since the WaterML2.0 format is implemented in SavaHIS, the WMO exchange standard,the system can store waterobservation data and spatialinformation, shared by countries,in a standard format. It alsosupports data sharing andpublication via web services forfurther use.