Data Assimilation’. In this framework, a data repository, the so-called TR32DB project database, was established in 2008 with the aim to manage the resulting data of the involved scientists [1]. The data documentation with accurate, extensive metadata has been a key task. Consequently, a standardized, interoperable, multi-level metadata schema has been designed and implemented to ensure a proper documentation and publication of all project data (e.g. data, publication, reports), as well as to facilitate data search, exchange and -use. A user-friendly web-interface was designed for a simple metadata input and search. As well as major cultural and organizational changes in the external operating environment, from which a sustainable business model for digital preservation has emerged. This article will take a retrospective look at challenges that have been faced and will review current and future priorities for those seeking to establish digital repositories.

Keywords : Metadata, Research, Management, Database, Spatial Infrastructures, Internet/Web, Soil, Vegetation, Atmosphere