Johnson, B. R. and Raines, G. L., 1995, Digital map of major 
lithologic bedrock units for the Pacific Northwest: a 
contribution to the Interior Columbia Basin Ecosystem Management 
Project

U.S. Geological Survey Open-File Report 95-680, 35 p. 
plus 2 plates. 

This report describes the contents of a digital dataset 
(approximately 50 MB) which consists of an ARC/INFO Export format 
file and associated macro programs.  The dataset includes a major 
lithology bedrock map of the northwestern U.S. north of 39  N 
latitude and west of approximately 108  W longitude compiled from 
the state geologic maps of Idaho, Oregon, and Washington, and 
portions of California, Montana, Nevada, Wyoming, and Utah.  The 
dataset also includes macro programs and complete plot files for 
creating paper copies of the map.  A page-sized, color version of 
the map is included in this report as well as a description of how 
to obtain the dataset over the Internet. 

Requirements:  A networked computer system is required to copy the 
dataset from the host computer across the Internet.  A Geographic 
Information System capable of importing ARC/INFO Export format 
files is required for access to the digital files.  All plot files 
are stored in HPGL2 format.  The digital dataset files are in UNIX 
ASCII format. 

This digital publication can be obtained from the World Wide Web server:

URL = http://pubs.usgs.gov/of/1995/of95-680/

The following files are available:

ofr95-680.pdf      Adobe Acrobat .pdf file (271 KB); text of 
                       Open-File Report
lithmp.pdf         Adobe Acrobat .pdf file (3.74 MB); OFR plates (2)
lithm.e00.Z        Lithology dataset in compressed Arc/Info Export format
bnd-cov.tar.Z      Additional datasets needed to re-produce paper map 
                       in a GIS; compressed tar of Arc/Info Export format
plot-aml.tar.Z     Text and AML files needed to re-produce paper map in 
                       Arc/Info; compressed tar of Arc/Info Export format
lith2m.hp.Z        1:2 Million scale map prepared from digital dataset in 
                       compressed HPGL2 format
readme.txt         This ASCII file