Readme file for USGS Data Series 137 Geologic map of the Wenatchee 1:100,000 Quadrangle, Central Washington: A Digital Database By R.W. Tabor, R.B. Waitt, V.A. Frizzell, Jr., D.A. Swanson, G.R. Byerly, and R.D. Bentley Digital Database Description for Geologic Investigations Series I-1311 Introduction The original geologic map for this database was published in 1982, based on geologic mapping and compilation by the authors during 1975 through 1979. The digital database was prepared from from drafted publication materials and published materials, converted to PDFs or vector ARC/INFO coverages by R.W. Tabor from 2003-2005. Together with the geologic pamphlet, the database provides georeferenced information on the geologic structure and stratigraphy of the area covered. The database delineates map units that are identified by general age and lithology following the stratigraphic nomenclature of the U.S. Geological Survey. The spatial resolution (scale) of the database is 1:100,000 or smaller. The content and character of the database, as well as two methods of obtaining the database, are described below. Digital database and metadata package The database and metadata package includes geologic map database files for the Wenatchee 30 x 60 minute quadrangle. The digital maps, or coverages, along with their associated INFO directory have been converted to uncompressed ARC/INFO export files. ARC export files promote ease of data handling, and are usable by some Geographic Information Systems in addition to ARC/INFO (see below for a discussion of working with export files). There is no raster data in this package. The ARC export files and associated ARC/INFO coverages, as well as the additional digital material included in the database, are described below: ARC/INFO Resultant Description of Coverage export file Coverage -------------------------------------------------------------- wengeology.e00 wengeology geologic contacts, faults, rock units wenlinfeature.e00 wenlinfeature morainal crests (including Qsy and Qso), fold axes, cross section line coverage, mapped Basalt of Rocky Point (Tgrp, too thin to show actual thickness), and ironstone formation (Tsir, too thin to show actual thickness) wenpoints.e00 wenpoints locations of age samples and flow directions in lava of Columbia River Basalt Group wenpattern.e00 wenpattern area of dike swarm of andesite of Horse Lake Mountain, area of hornblende feldspar dacite and granodiorite dike complex (Kmsd), areas of sheared serpentinite, areas of sheared sandstone wenteanaway.e00 wenteanaway estimated areal percentages of Teanaway dikes. Original data from field observations was presented on published map as dots at different densities. For this coverage, percentages were estimated from dot pattern wenstructure.e00 wenstructure structural symbols: bedding, foliation, and lineation, these symbols will not show on screen or plot without appropriate symbol sets available in Alacarte wenrocksamp.e00 wenrocksamp Locations of 81 rock samples archived and stored at North Cascades National Park, Marblemount, WA The database package also includes the following files: PDF files of: Description of Map Units (DMU), Microsoft word documents of metadata and this readme. Also downloadable from this site in separate files are PDF files: geologic map pamphlet (including illustrations), colored geologic map (including correlation chart and Description of Map Units DMU, but in a slightly different forms than the published map), Description of the Map Units, text only (DMU), Microsoft Word documents of metadata and this readme. The following supporting directory is not included in the database package, but is produced in the process of reconverting the export files into ARC coverages: info/ INFO directory containing files supporting the databases. Caution Data in these files is essentially unchanged from publication of I-1311 in 1982. More recent data are available in published geologic literature. Tar files The seven export files described above are stored in tar (UNIX tape archive) files. A tar utility is required to extract the database from the tar file. This utility is included in most UNIX systems, and can be obtained free of charge over the Internet from Internet Literacy's Common Internet File Formats Webpage (http://www.matisse.net/files/formats.html). The tar files have been compressed, and may be uncompressed with gzip, which is available free of charge over the Internet via links from the USGS Public Domain Software page (http://edcwww.cr.usgs.gov/doc/edchome/ndcdb/public.html). For software that enables the user to uncompress and extract the database files on a Windows or Macintosh computer, go to the U.S. Geological Survey (http://cpg.cr.usgs.gov/pub/software.html) or WinZip (http://www.winzip.com). When the tar file is uncompressed and the data is extracted from the tar file, a directory is produced that contains the data in the package as described above. The specifics of the tar files are listed below: Size: wencovers.tar.gz is about 4.3 MB. Uncompressed and untarred the ARC/INFO export files are: wengeology.e00 Ð 7 MB wenlinfeature.e00 Ð 288 KB wenpoints.e00 Ð 30 KB wenpattern.e00 Ð 272 KB wenteanaway.e00 Ð 272 KB wenstructure.e00 Ð 2.2 MB. wenrocksamp.e00 Ð 42 KB wenatcheeDMU.doc Ð 124 KB wen_readme.doc Ð 104 KB wenmetadata.doc Ð 244 KB PDF plot files Adobe Acrobat PDF (Portable Document Format) files are similar to PostScript plot files in that they contain all the information needed to produce a paper copy of a map or pamphlet and they are platform independent. Their principal advantage is that they require less memory to store and are therefore quicker to download from the Internet. In addition, PDF files allow for printing of portions of a map image on a printer smaller than that required to print the entire map without the purchase of expensive additional software. In test plots we have found that paper maps created with PDF files contain almost all the detail of the published maps We recommend the published maps for greatest definition. To use PDF files, the user must get and install a copy of Adobe Reader. This software is available free from the Adobe website (http://www.adobe.com/products/acrobat/readstep2.html). Please follow the instructions given at the website to download and install this software. Once installed, the Acrobat Reader software contains an on-line manual and tutorial. There are two ways to use Acrobat Reader in conjunction with the Internet. One is to use the PDF reader plug-in with your Internet browser. This allows for interactive viewing of PDF file images within your browser. This is a very handy way to quickly look at PDF files without downloading them to your hard disk. The second way is to download the PDF file to your local hard disk, and then view the file with Acrobat Reader. We strongly recommend that large map images be handled by downloading to your hard disk, because viewing them within an Internet browser tends to be very slow. To print a smaller portion of a PDF map image using Acrobat Reader, it is necessary to cut out the portion desired using Acrobat Reader and the standard cut and paste tools for your platform, and then to paste the portion of the image into a file generated by another software program that can handle images. Most word processors (such as Microsoft Word) will suffice. The new file can then be printed. Image conversion in the cut and paste process, as well as changes in the scale of the map image, may result in loss of image quality. However, test plots have proven adequate. Digital database format The databases in this report were compiled in ARC/INFO, a commercial Geographic Information System (Environmental Systems Research Institute, Redlands, California), with version 3.0 of the menu interface ALACARTE (Fitzgibbon and Wentworth, 1991; Fitzgibbon, 1991; Wentworth and Fitzgibbon, 1991). The files are in COVERAGE (ARC/INFO vector data) format. Coverages are stored in uncompressed ARC export format (ARC/INFO version 7.2.1 for Unix). ARC/INFO export files (files with the .e00 extension) can be converted into ARC/INFO coverages in ARC/INFO (see below) and can be read by some other Geographic Information Systems, such as MapInfo via ArcLink and ESRI's ArcView (version 1.0 for Windows 3.1 to 3.11 is available for free from ESRI's web site: http://www.esri.com). The digital compilation was done in version 7.2.1 of ARC/INFO for Unix. Obtaining the Digital Database and Plotfile Packages The digital data can be obtained in one of two ways: a. From the Western Region Geologic Information Web Page. b. Requesting the data on a CD To obtain tar files of database or plot file packages from the USGS web pages: The U.S. Geological Survey now supports a set of graphical pages on the World Wide Web. Digital publications (including this one) can be accessed via these pages. The location of the main Web page for the entire USGS is http://www.usgs.gov/ The Web server for digital publications from the U.S. Geological Survey is http://pubs.usgs.gov/ Go to http://pubs.usgs.gov/ds/137/ to access the data for this publication. Go to http://pubs.usgs.gov/imap/i1311/ to access the map sheet for this publication. To obtain tar files of database or plot file packages on CD: Database files, PostScript plot files, and related files can be obtained by requesting a CD from: Karen Wheeler c/o Database Coordinator U.S. Geological Survey 345 Middlefield Road, M/S 973 Menlo Park, CA 94025 Do not omit any part of this address! NOTE: Be sure to include with your request the exact names, as listed above, of the tar files you require. The compressed tar file will be returned on the CD. Obtaining hard copy of I-1311 USGS Information Services Box 25286 Denver Federal Center Denver, CO 80225-0046 (303)202-4200 1-888-ASK-USGS FAX: (303)202-4695 e-mail: infoservices@usgs.gov Acknowledgments We wish to thank the digital reviewer, Karen Wheeler, for the digital review of this material. References Cited Fitzgibbon, T.T., 1991, ALACARTE installation and system manual (version 1.0): U.S. Geological Survey Open-File Report 91-587B. Fitzgibbon, T.T., and Wentworth, C.M., 1991, ALACARTE user interface - AML code and demonstration maps (version 1.0): U.S. Geological Survey Open-File Report 91-587A. Wentworth, C.M., and Fitzgibbon, T.T., 1991, ALACARTE user manual (version 1.0): U.S. Geological Survey Open-File Report 91-587C.