Within the TERENO initiative, four terrestrial
observatories, collecting huge amounts of environmental data,
are being set up since 2008. To manage, describe, exchange
and publish these data, the distributed Spatial Data Infra-
structure TEODOOR (http://www.tereno.net) was created.
Each institution responsible for an individual observatory sets
up its own local data infrastructure, which may communicate
with each other to exchange data and metadata internally or to
the public by OGC compliant Web services. The TEODOOR
data portal serves as a database node to provide scientists and
decision makers with reliable and well-accessible data and data
products. Various tools like hierarchical search or Web-GIS
functions allow a deeper insight into the different observato-
ries, test sites and sensor networks. Sensor data can be queried
and selected for measured parameters, stations and/or time
periods, and can be visualized and downloaded according to a
shared TERENO data policy. Currently, TEODOOR provides
free access to data from more than 500 monitoring stations.