Digital Geologic-GIS Map of the French Gulch 15' Quadrangle, California (NPS, GRD, GRI, WHIS, FREG digital map) adapted from a U.S. Geological Survey Bulletin map by Albers (1964)
The Unpublished Digital Geologic-GIS Map of the French Gulch 15' Quadrangle, California is composed of GIS data layers and GIS tables in a 10.1 file geodatabase (freg_geology.gdb), a 10.1 ArcMap (.mxd) map document (freg_geology.mxd), individual 10.1 layer (.lyr) files for each GIS data layer, an ancillary map …