Depth to top of the Madison Limestone

This data set is a polygon coverage created in ARC/INFO that represents the depth to the top of the Madison Limestone below the land surface, Black Hills, South Dakota.本数据集为基于ARC/INFO创建的多边形覆盖层，用于表征美国南达科他州布莱克山区域内麦迪逊石灰岩顶面的地表埋深。