Bauer-Messmer, BettinaWotruba, LukasMüller, KalinBischof, SandroGrütter, RolfScharrenbach, ThomasMeile, RolfHägeli, MartinSchenker, JürgWohlgemuth, VolkerPage, BerndVoigt, Kristina2019-09-162019-09-162009https://dl.gi.de/handle/20.500.12116/26236The Data centre Nature and Landscape (DNL), originally planned as a long-term database for biotope information, has constantly evolved over the last 11 years. It is now a virtual data centre connecting several databases located all over Switzerland, enriched with a user-friendly web interface, which has been partially redesigned into a service oriented architecture. It can now offer open and intuitive search facilities based on semantic technologies. Many lessons have been learned, particularly in the field of heterogeneous environmental information systems. The purpose of this paper is to share our experience with other experts developing and maintaining environmental information systems.Text/Conference Paper