The document announces an inter-regional symposium on cross-border spatial data infrastructures (SDIs)/geographic data infrastructures (GDIs) to be held on May 23-24, 2011 in Bad Schandau, Germany and Decin, Czech Republic. The goal is to share knowledge on progress integrating SDIs across European border regions in line with EU directives on public sector information reuse and INSPIRE. The agenda includes sessions on cross-border data sharing, SDI integration and applications, as well as a roundtable discussion. Participants will learn about best practices from existing cross-border geoportals and projects like NATURNET, and discuss challenges of implementing INSPIRE in border