Digital Geologic Map of the Guinea Quadrangle, Virginia (NPS, GRD, GRE, FRSP)

The Digital Geologic Map of the Guinea Quadrangle, Virginia is comprised of GIS data layers, two ancillary GIS tables, a Windows Help File with ancillary map text,...弗吉尼亚州几内亚四边形区域（Guinea Quadrangle）数字地质图由地理信息系统（Geographic Information System，GIS）数据图层、两个配套GIS属性表，以及一份附带配套地图说明文本的Windows帮助文件等组成。