The goal of this project is to encourage geospatial end-users, especially those users related to the use of GMES services, in using OSS by setting up a Trans-national cascade training programme on Open Source GIS&RS software with an emphasis on environmental applications. The cascade training programme aims at training, on international level, small groups of ‘high-end’ geospatial users (e.g. high level GIS and/or RS and/or IT experts) who will be expected to transfer, on national or regional level, the knowledge and abilities they have learned to ‘low-end’ geospatial users (e.g. Scientists, public administrators,..). Open source GIS&RS software can play a key role in making a truly European Spatial Data Infrastructure. More information about the project can be found at CASCADOSS project consortium web site www.cascadoss.eu .