Currently the border regions of Austria, Italy, Slovenia, Hungary and Croatia are experiencing changes regarding their economic and spatial development. A cross-border strategic information system for regional planning purposes is necessary to harmonise and adjust regional development strategies and to overcome deficits in data provision and to intensify cooperation. REDECON will develop and implement an innovative tool database and geographic information system for regional planning to support public authorities and private firms. At the centre of this tool is a grid-based database with a GIS interface. It merges socio-economic, environmental and spatial data with accessibility data. On the one hand, this tool will enable public planning departments to analyse and simulate different kinds of policy measures and their regional impacts. On the other hand, the tool should help private companies to find optimal locations for their businesses.