The ISMN data portal is a tool that can be used for viewing and downloading in-situ data. User registration is not needed for looking at the data. The data viewer embeds Open Street Map, an open-source and freely available service, which offers the user a map-based selection tool to view and download the available data. By clicking on the markers, the user obtains a summary of important metadata about the networks or stations, respectively, depending on the zoom level. 

 

Login / registration (free) is mandatory for data download, therefore please find further information under Data download.