ESTIA-SPOSE builds upon the experience accumulated by its predecessor ESTIA project and intends to develop Actions for a Spatial Planning Observatory in Southeast Europe, based on an integrated system of territorial indicators fully compatible with the approach of ESDP and ESPON. This system of indicators will be tested in a series of pilot applications in selected sectors and areas with the aim to promote both conceptual understanding and operational compatibility among the existing national spatial planning traditions. This will support effective trans-national cooperation and will increase the synergy among the spatial planning and development efforts in Southeast Europe. The ESTIA-SPOSE space refers to the southeast part of CADSES, consisting of accession (Bulgaria, Romania, Slovenia, and Hungary) and non-member countries (Albania, Herzegovina, Croatia, FR Yugoslavia, FYROM). In the project participate the EU member states (Greece, Italy, Austria and Germany). The ESTIA-SPOSE project has three main components: