The European SDI (INSPIRE) is based on existing data of Member States. The INSPIRE Directive does not intend to change the way how data are collected, processed and stored. INSPIRE focuses on harmonisation and interoperable exchange of spatial data and services. The main target of Sdi4apps is to bridge the 1) top-down managed world of INSPIRE, Copernicus and GEOSS built by SDI experts and 2) the bottom-up mobile world of voluntary initiatives and thousands of micro SMEs and individuals developing applications (apps). Sdi4apps will secure that users profit from INSPIRE and INSPIRE profits from different voluntary initiatives. Sdi4apps will build a WIN-WIN strategy for building a successful business for hundreds of European SMEs on the basis of INSPIRE, Copernicus and GEOSS.