沿革地理是研究历史时期疆域、政区变迁的学科,“沿”即沿袭,“革”即变革,是现代历史地理学的前身。任何国家为了行政管理的方便,必须将其国土划分为有层级的区域,这个区域就是行政区域,简称政区。政区有诸多要素,如层级、幅员、边界、名称、形状、行政中心等,这些因素的变迁是政区沿革 History Geography is the study of the history of the territory, political changes in the area, “along” that lineage, “leather” or “change” is the predecessor of modern history and geography. In order to facilitate the administration of any country, any country must divide its territory into hierarchical areas. This area is the administrative area, referred to as the administrative area. There are many elements of the political district, such as the level, size, boundaries, names, shapes, administrative centers, etc., these changes are political evolution