Digital Geologic-GIS Map of the Port Tobacco Quadrangle, Maryland (NPS, GRD, GRI, THST, POTO digital map) adapted from a Maryland Geological Survey Quadrangle Geologic Map by Glaser (1984)
The Digital Geologic-GIS Map of the Port Tobacco Quadrangle, Maryland is composed of GIS data layers and GIS tables, and is available in the following GRI-supported GIS data formats: 1.) a 10.1 file geodatabase (poto_geology.gdb), and a 2.) Open Geospatial Consortium (OGC) geopackage. The file geodatabase format is …