Keywords: NGMDB Regional maps support.jpg en Figure 14 Regional maps whose compilation and/or GIS development is supported by the NGMDB The uppermost map the Geologic Map of North America is discussed in the text The center map is in press Soller and Reheis in press and must be converted to a database The database for the lower map is published Soller and Packard 1998 and will be adapted to the emerging NGMDB standards http //pubs usgs gov/of/2003/of03-471/soller1/index html The National Geologic Map Database Project Overview and Progress U S Geological Survey Open-File Report 03 “471 David R Soller1 and Thomas M Berg 2003 PD-USGov National Geologic Map Database Project |