0readme.txt DOS ASCII file that describes the digital data for USGS Miscellaneous Investigations Series Map I-1509-A, 7/27/2000, pd



Harrison, J.E., Griggs, A.B., Wells, J.D., Kelley, W.N., Derkey, P.D., and EROS Data Center, 2000, Geologic and structure maps of the Wallace 1o x 2o quadrangle, Montana and Idaho: a digital database: U.S. Geological Survey Miscellaneous Investigations Series Map I-1509-A, version 1.0, 21 p. (received Director's approval 7/24/2000)



This report describes the contents of a digital data set which consists of Arc/Info exchange-format files and associated macro programs.  A page-sized, color version of the digital geologic map is included in the report.  The data set also includes macro programs and complete plot files for creating a paper copy of the map at a scale of 1:250,000.  The data set is available on the World Wide Web at http://pubs.usgs.gov/imap/i1509a/.  



Requirements:  A networked computer system is required to copy the data set from the host computer across the Internet.  A geographic information system (GIS) capable of importing Arc/Info exchange-format files is required for access to the digital files.  The plot file (wal250k.hp) is stored in HPGL2 format.  The digital data files are in UNIX ASCII format.



***************************************************

Explanation of digital data files:



The Wallace 250K GIS is available as one UNIX compressed TAR file, wal250k.tar.Z, which includes the report text (wal250k.pdf) in an Adobe Acrobat Portable Document File (PDF) format.



To download the GIS data files, create a new workspace in a UNIX working environment and copy the wal250k.tar.Z file to your new workspace. Use the command 'uncompress -v wal250k.tar.Z' to uncompress the file. Then use the command 'tar -xvf wal250k.tar' to extract the files from the TAR file. And finally, to import the Arc/Info exchange-format files (*e00) into your workspace, open Arc/Info on your workstation and enter '&run importfile' at the Arc prompt.



Your working directory should contain the following files:

00readme.txt - this file in UNIX ASCII format

0readme.txt - this file in DOS ASCII format

importfile.aml -  Arc/Info program to import Arc/Info interchange-format files into the user's workspace.

wal250k.pdf - Open-File Report text in Adobe Acrobat Portable Document File (PDF) format. 



Primary Arc/Info exchange-format files (*.e00) and metadata (*.met) for the digital geology of the Wallace quadrangle:



wal250k.e00 - principal Wallace line and polygon geologic map coverage

wal250bc.e00 - point coverage of breccia locations

wal250k.met - metadata file



Additional Arc/Info exchange-format files (*.e00) necessary to re-create a digital geologic map (sheet 1):



calcomp1.shd.e00 - calcomp1.shd shadeset

fnt037.e00 - font 37

fnt038.e00 - font 38

fnt040.e00 - font 40

geol_sfo.lin.e00 - lineset

usgs.mrk.e00 - markerset

wal250tm.e00 - exterior boundary of the Wallace quadrangle, mathematically generated. 



Arc/Info AML, graphics, key, and text files necessary to re-create a geologic map (sheet 1):



wal250k.aml  - program to create graphics file of the geologic map

scale2a.aml - program to plot scale bar



indx_wal.gra - index map graphic file

usgslogo.gra - USGS visual identity



wa_line.key - lineset symbol values and descriptive text for lines on the map sheet

wa_line2.key - more lineset symbol values and descriptive text for lines on the map sheet

wa_pol.key - shadeset symbol values and descriptive text for geologic map units on the map sheet

wa_point.key - markerset symbol values and descriptive text for breccia outcrops





geo.prj - a text file used to identify real-world (geographic) coordinates - for use in adding latitude and longitude notation around the margins of the Wallace quadrangle.

tvm.prj - a text file to identify Transverse Mercator projection - for use in adding latitude and longitude notation around the margins of the Wallace quadrangle.

walcrd.txt - text file listing map credits

waldisc.txt - text file for USGS disclaimer

walref.txt - text file listing map references



Plotter calibration file:

cal.dat - the color calibration file used in the Arc/Info 'HPGL2' command to create plot files of the plates for plotting on the USGS HP650C in the Spokane Field Office.  This file is a custom file for this particular plotter.  Other plotters will require their own custom color calibration file.



Arc/Info graphics (*.gra) and HPGL2 (*.hp) files for the digital geologic map quadrangle sheet (scale 1:250,000):

wal250k.gra

wal250k.hp