For many years projects and companies engaged in free software projects dealing with geographical information systems had the opportunity to present themselves in a special area termed Open Source Park at the trade fair InterGEO. In 2010 it is also envisioned to provide the same service to exhibitors from the open source sector as in past years to present themselves. The company terrestris has been using and developing free software for years now which is one of the reasons why we agreed to adopt a coordinating role in the planning of this years’ Open Source Park. In this we will closely cooperate  with the organisers of the trade fair and the companies which assumed this role in recent years.