Haß, StefanieKruse, FredKnetsch, GerlindeZacharias, Ute2019-09-202019-09-202012https://dl.gi.de/handle/20.500.12116/27730Since the introduction of the Environmental Information Portal, PortalU (www.portalu.de) in 2006 the Portal publishes environmental information from public agencies. Visitors to the portal can search environmental web pages, documents, maps (WMS) and metadata, published by more the 450 providers all over Germany. Environmental data in open data portals are requested frequently and play an important role in developing applications for people generally interested in this field. PortalU sets standards in publishing and searching environmental data. Large sets of metadata are collected on the basis of ISO-conform data catalogues. The link between the metadata and the published information in the PortalU is a key element for improving the presentation and content of information in the portal. Further aspects in optimizing the information retrieval is the analysis of user search log files, which allows identifying certain search pattern. With these findings the PortalU search machine can be adapted to user requirements. The coordination centre PortalU (Koordinierungsstelle PortalU) plans to expand the portal service portfolio by testing and applying those methods.Text/Conference Paper