Preliminary geologic map and digital data base of the Almo quadrangle and City of Rocks National Reserve, Cassia County, Idaho

By David M. Miller, Richard L. Armstrong, David R. Bedford, and Marsha Davis

U.S. Geological Survey Open-File Report 2008-1103


DESCRIPTION OF DATA FILES



INTRODUCTION


This publication includes ARC/INFO (Environmental Systems Research Institute, 
http://www.esri.com) version 9.0 coverages and associated tables; Portable 
Document Format (PDF) files of the geologic map (which includes four structural 
cross sections) and an accompanying geologic pamphlet; and a text file of FGDC- 
compliant metadata for the report.
 
GEOLOGIC MAP DATABASE FILES AND ASSOCIATED FILES


ARC/INFO			Coverage		Contains 	
Interchange file

ciro_geo.e00			ciro_geo		Contacts, faults, and rock units
ciro_str.e00			ciro_str		Geologic Structure: strike, attitudes and dip values
ciro_xs.e00			ciro_xs		 	Location of Cross-section lines 

ArcMap Layer files					Contains 
(used for symbology)

CIRO Cross-section.lyr					coverage "ciro_str" lines and annotation
CIRO Map Units, Contacts, Faults.lyr			coverage "ciro_geo" lines and polygons
CIRO Structural Points.lyr				coverage "ciro_str" points and annotation
ciro_geo arc.lyr					coverage "ciro_geo" lines
ciro_geo polygon.lyr					coverage "ciro_geo" polygons
ciro_str point.lyr					coverage "ciro_str" points



FILES FOR VIEWING AND PLOTTING

OFR2008_1103_map.pdf			A Portable Document Format (PDF) file for viewing
					and plotting the geologic map at full scale.  The
					plot is approximately 29 x 37 inches in size.

OFR2008_1103_pamphlet.pdf		A Portable Document Format (PDF) file for viewing
					and printing a pamphlet that accompanies the map.
					The pamphlet contains a geologic interpretation
					and the description of map units.

METADATA

OFR2008_1103_metadata.txt			Federal Geographic Data Committee (FGDC) compliant
					metadata file derived from the digital database

SOFTWARE UTILITIES

Files that have the .gz file extension were compressed using gzip.  Gzip 
utilities are available free of charge via the Internet at the gzip home page, 
http://www.gzip.org.

The data package is additionally bundled into a single tar (tape archive) file.  
The individual files must be extracted using a tar utility, available free of 
charge via the Internet through links on the Common Internet File Formats page, 
http://www.matisse.net/files/formats.html.  One such utility is WinZip, 
available at http://www.winzip.com (WinZip can also decompress files).

HOW TO OBTAIN THE DIGITAL FILES

The digital files constituting the geologic map database of this report may be 
obtained via the Internet from the U.S. Geological Survey publications website.  
Go to the web page at http://pubs.usgs.gov.  Browse for the publication of interest
and follow the download instructions.

EXTRACTING THE GEOLOGIC MAP DATABASE FROM THE TAR FILE

After downloading the files, they must be uncompressed using a gzip utility such 
as gzip itself or WinZip.  The data files must then be extracted using the 
appropriate tar utility.


CONVERTING THE ARC/INFO EXPORT FILES

ARC interchange (.e00) files are converted to ARC coverages using the ARC 
command IMPORT with the option COVER, and with the ArcGIS ArcCatalog application

ARC interchange files can be read by some other Geographic Information 
Systems.  Please consult your GIS documentation to see if you can use ARC 
interchange files and to determine the procedure for importing them.

PORTABLE DOCUMENT FORMAT (PDF) FILES

The PDF files are accessed using Adobe Acrobat Reader software, available free 
from the Adobe website http://www.adobe.com.  Follow instructions at the website 
to download and install the software.  Acrobat Reader contains an on-line manual 
and tutorial.