Abstract:
Both countries and international organizations for example EU and NATO have a boundary. How and which criteria determines these boundaries. This study includes physical geography features which forms some of these criteria. These criteria are geomorphologic and hydrologicalfeatures such as mount, river, sea, lake, etc. These criteria's definitions and features will be explained according to physical geography science. These factors will be supported with samples about determining of boundaries. Besides do these criteria always effect on determining of boundaries? Withanother word are there different using criteria other these. What are these?They will briefly explain. As a consequence the aim of our study is presenting Physical Geography's importance about determining of border line.
