The intensive survey followed the coastal line of the western central part of the Gulf of Mirabello between the Gournia-Plain and the Istron-Valley, and in the south it reached the Meseleroi-Valley. The surveyed area was divided into 13 topographical regions in order to better track the development of the settlements. The most important zones are the littoral, the Istron-Valley and the hills which encompass this valley.  