Increasingly, remote sensing data is made publicly available by organizations like ESA and NASA. Based on these data, and in combination with other sources, new valuable applications can be created. In the European research project Linked Open Earth Observation Data for Precision Farming (LEO) researchers from CWI and the University of Athens join their forces with industry partners to develop an application for precision farming. The new application is based on remote sensing and geospatial data. With precision farming - advanced agriculture using GPS, satellite observations and tractors with on-board computers - the farming process is performed as accurately and efficiently as possible. This is achieved by combining data from earth observations with other geospatial sources such as cadastral data, data on soil quality, vegetation and protected areas. This enables farmers to find the optimal trade-off in maximizing yield while minimizing fertilizers and pesticides. At CWI, the researchers will combine various data sources, transfer them into RDF format and publish them as Linked Open Data.