ENVIP 2013 - Environmental Information Systems and Services - Infrastructures and PlatformsProceedings of the Workshop "Environmental Information Systems and Services - Infrastructures and Platforms 2013 - with Citizens Observatories, Linked Open Data and SEIS/SDI Best Practices" co-located with the International Symposium on Environmental Software Systems 2013 (ISESS 2013), Neusiedl am See, Austria, October 10, 2013 Neusiedl am See, Austria, October 10, 2013.