MDI-DE aims to provide data and information coming from coastal engineering, coastal protection, marine environmental protection and marine nature protection via a joint internet portal. Metadata and web-services support the search for data and their use. The database helps German administration to fulfill reporting for EU directives like MSFD and INSPIRE. MDI-DE was funded by the German Ministry for Research (between 2010-2013) supported by eleven authorities of the Federal Government and the Federal States. Since April 2014 MDI-DE is continously developed as VKoopUIS project.