عنوان مقاله [English]
The intersection of Bafgh-Mashhad railway with Niganan basin is part of Iran's salt pan within the range of eastern longitudes of 57 to 58 degrees and 30 minutes, and northern latitudes of 33 degrees and 15 minutes to 34 degrees and 45 minutes. Since examination of safety methods of railway’s intersection with the mentioned basin is dependent on availability of basic information and maps with regard to natural phenomena, this paper attempts to explain the methods of preparing and evaluating different maps in relation to the subject, in such a way as to provide a proper and (as much as possible) accurate picture of the basin. Geographic information system software has been used to prepare, utilize, combine and process maps, which will be referred to in the text. In order to express the necessity of studies of this type, a summary and a list of natural disasters and problems that have taken place throughout the Iranian railway network in recent years has been reviewed and, in particular, this basin has been examined and the results are presented.