以1926年出版的顺直地形图（1∶5万）为基础图件，使用地理信息系统（GIS）的方法，统计研究邢台和唐山两地震区地表水系的密度分布。
Base on the Shun-zhi topographic map published in 1926 , the density distribution of surface water system in Tangshan and Xingtai areas have been studied with GiS method .
顺地形