DESCRIPTION OF DIGITAL FILES FOR GEOLOGIC MAP OF THE BEACON ROCK QUADRANGLE, SKAMANIA COUNTY, WASHINGTON Database by Robert S. Nicholson 2017 INTRODUCTION This readme document serves to introduce and describe the digital files that are included in this publication. They are available for downloading at https://doi.org/10.3133/sim3367/ and include Geographic Information System (GIS) software files (vector data) that are viewable with an Environmental Systems Research Institute (Esri) compatible commercial GIS (or with EsriÕs ArcReader utility; a free map viewer with no editing capabilities), as well as Portable Document Format (PDF) files that are viewable with Adobe Acrobat Reader or a web browser plug-in available for free on the internet. Two download packages are available depending on the resources available to the user (see the section entitled ÒScientific Investigations Map 3367 Digital ContentsÓ below for details). For those interested only in a paper plot of the Scientific Investigations Map, please see the section entitled "Obtaining Paper Plots" below. This digital map publication, generated from new mapping by the authors, shows the general distribution of bedrock and surficial deposits in the Beacon Rock 7.5' quadrangle. Together with the accompanying descriptive and interpretive pamphlet, it presents current knowledge of the geologic structure and stratigraphy of the area. The database identifies map units that are classified by general age and lithology following the stratigraphic nomenclature used by the U.S. Geological Survey. The scale of the source map limits the spatial resolution (scale) of the database to 1:24,000 or smaller. The content and character of the digital publication, as well as methods of obtaining the digital files, are described below. SCIENTIFIC INVESTIGATIONS MAP 3367 DIGITAL CONTENTS The digital data for this Scientific Investigations Map consists of: 1. A Geodatabase package that contains geologic vector and tabular data stored as data objects within an Esri-format personal geodatabase, an Esri map document for use with ArcGIS 10.2 that allows editing and rendering of the data sources, an Esri published map document for use with ArcReader that allows viewing and querying of the source data along with metadata, and an ArcGIS style for symbolizing the map. 2. A Shapefile package that contains shapefiles exported from the personal geodatabase along with supporting files. 3. Metadata files for the entire database. 4. PDF files of map sheets 1 and 2, base map, and pamphlet. Each package has been compressed into a single file (.zip extension) using WinZip, a freely downloadable compression software utility (download from http://www.winzip.com/). Each compressed file will uncompress into a folder containing the associated files. If you: * Have access to ArcGIS 10.2, download the Geodatabase package and open the map document (.mxd extension) from ArcGIS. * Have access to ArcView 3.x (or a GIS that can read shapefiles), download the Shapefile package. * Do not have access to a GIS but wish to view and query the data, download the Geodatabase package and open the published map document (.pmf extension) from ArcReader (free download from http://www.esri.com/). * Do not have access to a GIS and only wish to print the map sheet or parts of it, download the PDF package and open them from Adobe Reader 7.0 or later (free download from http://www.adobe.com/). Note that the map sheet is approximately 36 x 56 inches and will require a large-format plotter. * Only wish to have a paper copy of this Scientific Investigations Map, see the section entitled "Obtaining Paper Plots" below. 1. GEODATABASE PACKAGE sim3367_database.zip Beacon_Rock.mdb An Esri personal geodatabase with simple feature classes: Feature Classes Description BR_Chem A point feature class representing geochemistry data BR_Conts_con A line feature class representing concealed contacts and faults BR_Conts_uncon Aline feature class representing unconcealed contacts and faults BR_Folds A line feature class representing fold axes BR_Geochron A point feature class representing Ar/Ar data BR_misc_lines A line feature class representing various line types BR_misc_symb A point feature class representing various symbols BR_Pmag A point feature class representing paleomagnetic data BR_Stations A point feature class representing station locations BR_Struct A point feature class representing structural point data BR_Units A polygon feature class representing rock units BR_Xsect A line feature class representing cross section locations Beacon_Rock.mxd Map document created in ArcGIS 10.1 containing the data rendering and symbolization information that was used in the production of the Scientific Investigations Map sheet. For this release, the layers were grouped logically and given aliases in order to be more usable. Beacon_Rock.style Custom style file used to symbolize lines, polygons, and points 2. SHAPEFILE PACKAGE sim3367_shape.zip Shapefiles Description BR_Chem.shp A point shapefile of the geochemistry data exported from the geodatabase (see Geodatabase Package above) BR_Conts_con.shp A line shapefile of the concealed contacts and faults exported from the geodatabase (see Geodatabase Package above) BR_Conts_uncon.shp A line shapefile of the unconcealed contacts and faults exported from the geodatabase (see Geodatabase Package above) BR_Folds.shp A line shapefile of the folds axes exported from the geodatabase (see Geodatabase Package above) BR_Geochron.shp A point shapefile of the Ar/Ar data feature class exported from the geodatabase (see Geodatabase Package above) BR_misc_lines.shp A line shapefile of the various line type feature class exported from the geodatabase (see Geodatabase Package above) BR_misc_symb.shp A line shapefile of the various symbols feature class exported from the geodatabase (see Geodatabase Package above) BR_Pmag.shp A point shapefile of the paleomagnetic data feature class exported from the geodatabase (see Geodatabase Package above) BR_Stations.shp A point shapefile of the station locations feature class exported from the geodatabase (see Geodatabase Package above) BR_Struct.shp A point shapefile of the structural point data feature class exported from the geodatabase (see Geodatabase Package above) BR_Units.shp A polygon shapefile of the rock unit feature class exported from the geodatabase (see Geodatabase Package above) BR_Xsect.shp A line shapefile of the cross section feature class exported from the geodatabase (see Geodatabase Package above) 3. METADATA Files Description Beacon_Rock_MDB_metadata.txt Metadata for the geodatabase, Beacon_Rock.mdb Geology_FDS_metadata.txt Metadata for the Feature Data Set, Geology BR_Chem_metadata.txt Metadata for the Feature Class, BR_Chem BR_Conts_con_metadata.txt Metadata for the Feature Class, BR_Conts_con BR_Conts_uncon_metadata.txt Metadata for the Feature Class, BR_Conts_uncon BR_Folds_metadata.txt Metadata for the Feature Class, BR_Folds BR_Geochron_metadata.txt Metadata for the Feature Class, BR_Geochron BR_misc_lines_ metadata.txt Metadata for the Feature Class, BR_misc_lines BR_misc_symb_metadata.txt Metadata for the Feature Class, BR_misc_symb BR_Pmag_metadata.txt Metadata for the Feature Class, SI_Pmag BR_Stations_ metadata.txt Metadata for the Feature Class, BR_Stations BR_Struct_metadata.txt Metadata for the Feature Class, BR_Struct BR_Units_metadata.txt Metadata for the Feature Class, BR_Units BR_Xsect_metadata.txt Metadata for the Feature Class, BR_Xsect 4. PORTABLE DOCUMENT FORMAT (ADOBE ACROBAT 7.0) FILES Files Description sim3367_map1.pdf An image of the map sheet 1 exported from Adobe Illustrator sim3367_ma21.pdf An image of the map sheet 2 exported from Adobe Illustrator sim3367_pamphlet.pdf Explanatory pamphlet sim3367_base.pdf Custom base map OBTAINING THE DIGITAL DATA The digital data for this map can be obtained in two ways: 1) Download from the U.S. Geological Survey Web Site 2) Request a compact disc (CD) of the files 1) TO OBTAIN THE FILES FROM THE U.S. GEOLOGICAL SURVEY WEB SITE: The U.S. Geological Survey 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 U.S. Geological Survey is http://www.usgs.gov/. The Web server for the USGS Publications Warehouse is https://pubs.er.usgs.gov/. To access files for this Scientific Investigations Map, go to httsp://doi.org/10.3133/sim3367 2) TO OBTAIN A CD OF THE FILES: A CD of any or all of the digital files described here can be obtained by sending a request and return address to: Russell C. Evarts U.S. Geological Survey 345 Middlefield Road, M/S 973 Menlo Park, CA 94025 or by email: revarts@usgs.gov OBTAINING PAPER PLOTS TO OBTAIN PLOTS FROM A COMMERCIAL VENDOR: First obtain the PDF package via a download or by requesting a CD of the PDF package as described above. Take that package to a commercial vendor with a large-format plotter. Make sure the vendor is capable of reading CDs and PDF files and provide the vendor with a copy of this document. DIGITAL COMPILATION Several different feature classes were generated within a geodatabase during the construction of the Beacon Rock quadrangle geologic map. The topographic base map and hillshade image remain as digital rasters and are overlain on the geology feature class in ArcMap at a 30 percent transparency level. Some custom menus were used to project, transform, edit, tag, and build points in the map. A digital map collar was made with Adobe Illustrator. The map was exported from the layout view in ArcMap as an Adobe Illustrator file and added to a single Adobe Illustrator file that also contained the description of map units, correlation of map units, cross sections, and an index map. Differences between the maps as they appear in the final map sheet and as they appear in the .mxd file represent changes made in the Adobe Illustrator file to the symbology only and do not reflect any changes in the actual source data. The map is in Universal Transverse Mercator (UTM) projection, NAD83 datum, zone 10, meters, and 1:24,000 scale. The explanatory pamphlet was saved as a PDF from Microsoft Word. BASE MAP The base map for the digital compilation is a custom map of the Beacon Rock quadrangle compiled in Adobe Illustrator. A hillshade image and 40-foot contours were generated in ArcGIS from lidar data acquired by the U.S. Army Corps of Engineers and the Washington Department of Natural Resources in 2005. The data were georeferenced to Universal Transverse Mercator projection, NAD83 datum and imported into Illustrator. Cultural features, political boundaries, and the Public Lands Survey System were transferred from the 2013 USGS Beacon Rock topographic quadrangle. Stream courses and roads were hand-drawn from the lidar data. The base map layer is a digital image, but no information other than location is attached to the lines. The base map is provided for reference only. SPATIAL RESOLUTION Uses of this digital geologic map should not violate the spatial resolution of the data. Although the digital form of the data removes the constraint imposed by the scale of a paper map, the detail and accuracy inherent in map scale are also present in the digital data. The fact that this database was edited at a scale of 1:24,000 means that higher resolution information is not present in the dataset. Plotting at scales larger than 1:24,000 will not yield greater real detail, although it may reveal fine-scale irregularities below the intended resolution of the database. Similarly, where this database is used in combination with other data of higher resolution, the resolution of the combined output will be limited by the lower resolution of these data. ACKNOWLEDGMENTS We thank Zenon C. Valin for a digital review of this database.