U.S. Geological Survey Open-file Report 94-255Online Version 1.0

## The Southern Lake Michigan Coastal Erosion Study CD-ROM

*By*         C.F. Polloni1, C.L. Brown2, D.W. Folger1, D.S. Foster1, and A.L. Brill3

                  Display software by Russell A. Ambroziak4                  Documentation by Christine A. Cook4

1U.S. Geological Survey, Woods Hole, MA 025432U.S. Forest Service, Jacksonville, OR 975303Duke University, Durham, NC 277084U.S. Geological Survey, Reston, VA 22092

##       CONTENTS

     The following maps and data are included on this CD-ROM:

- A general map (Fig. 1) showing the Great Lakes region and           the southern Lake Michigan study area. Ship tracks, along           which bathymetric, sidescan sonar, and high-resolution seismic           reflection data were collected, can be displayed, as well as           offshore core locations.
-   A bathymetric contour map (Fig. 2) of the southern Lake           Michigan survey area prepared using data aquired from this           study and from the National Ocean Survey's digital data           base. Contours are in meters. Low-resolution contours have           10 m intervals; high-resolution coutours have 5 m intervals. 
-       Map (Fig. 3) showing location and composition (sand, silt,           clay, and gravel) of bottom sediment samples, and the thickness           and distribution of postglacial sediments.
-       A collection of digital and scanned analog sidescan-sonar images           and mosaics (Fig. 4) depicting the sonic reflectivity (geologic           makeup) of the lakefloor. Each image can be viewed at expanded           scales using the software provided.
-   A reference map (Fig. 5) showing sites of scanned color photo-           graphs, areas of bluff erosion, and scanned analog seismic           reflection profiles from selected core sites. Seismic profiles            include interpretive line drawings of the stratigraphy.  Each            image may be displayed, at expanded scales,  when selected from           it's location on the map in relation to ship tracks which indicate           where the data was collected.

##               DISC CONTENTS

      Several  DOS subdirectories are contained on this  CD-ROM.  Their       names and the information they contain are listed below:

-  BASEMAP   DOCFILES DOSMENU
-  FRMWRK   IGSMAP IGSPRO
-  LAKLEVEL   NAVTRACK      \IGSMAP - Illinois State Geological Survey Arc/Info map coverages.      \IGSPRO - Illinois State Geological Survey Beach profiles in Arc/Info        format.      \BASEMAP - This subdirectory contains the geologic map data and        other information which include ships track, bathymetry, lines        and polygons showing the distribution and thickness of major        sediment types, seismic profiles, and photographs.      \DOSMENU  - This  subdirectory  contains  all  the   software         required to support the menu system used when running under a         DOS system.  This menu system is typically invoked by issuing         the command 'SLMMAP' from the user's root directory after        performing an install.      \DOCFILES  - This  subdirectory contains the  ASCII  document         files for this CD-ROM.  These files include:           ACKNOWL.DOC  - This file provides acknowledgments of the            producers of this CD-ROM disc as well as of the  sources            of the data contained on this disc.           AUTHORS.DOC  - This file lists the authors of this  Open            File CD-ROM.           BATHY.DOC  - This file provides technical information on            the bathymetric data contained on the disc.            CONTACTS.DOC - This file provides a list of contacts for            additional   information  on  this  CD-ROM,   the   U.S.            Geological Survey's CD-ROM Support Center,  and the data            contained on this disc.           CONTENTS.DOC  - This file contains a description of  the            contents  of  the various subdirectories on this  CD-ROM            disc.            DISCLAIM.DOC  - This  file contains the  disclaimer  for            this CD-ROM.           GETSTART.DOC   - This   file  contains  a   step-by-step            explanation  of the use of the CD-ROM display  software.            Upon completion of this brief tutorial,  the user should            have a good working knowledge of how to select, display,            and output data from this CD-ROM.           IMVIS.DOC  - This file describes the DOS program IMVIS           which is used to view color and grey scale images.           INTRODOC.DOC  - This file contains a brief introduction to            this CD-ROM and some information on how it was constructed.           KLEIN.DOC - This file  provides technical information on            the Klein image data contained on the disc.            MAPPER.DOC  - This file describes the DOS program MAPPER           which is used to view earth registered color polygons,           points, and vector linework overlays.           OVERVIEW.DOC  - This file is the primary text describing           the entire project as a whole.  It is the pre-press           version of the paper published in the Journal for International           Great Lakes Research (Folger and others, 1994).  This document            includes four figures which are similar but not the same as           the figures in the published document.           REFERENC.DOC  - This  file lists the references cited in            the documentation contained on this CD-ROM.            REGISTER.DOC - This file contains a registration form by            which  a user can elect to receive announcements of  new            CD-ROM  releases  and of updates to  previous  releases.            This  form also provides a vehicle for  suggestions  and            feedback to the USGS on the current disc.            VIEWLBL.DOC - Documentation and tutorial for VIEWLBL program                \FRMWRK -  The framework group directory.  Contains directories           and archive files for this project group.  A directory was           made for each contributer.            \FOLGER  - D. Folger            \FOSTER  - D. Foster            \POLLONI - C. Polloni            \SHABICA - C. Shabica      \LAKLEVEL - The lakelevel group directory.  Contains directories           and archive files for this project group.            \COLMAN  - S. Colman            \FORESTER- R. Forester            \THOMPSON- T. Thompson      \NAVTRACK - Cruise navigation data, an archive for the principle           ship tracks performed during study.      \PROCESS -  The process group directory.  Contains directories           and archive files for this project group.            \JBOOTH  - J. Booth            \KEMPEMA - E. Kempema            \MCCORMIC- M. McCormick            \OLYPHANT- G. Olyphant      \SOFTWARE - This subdirectory contains executable versions of         the display software and other related processing routines.       \SOURCE  - This  subdirectory contains the C language  source         and  object  code for the various software routines developed        for use on this  CD-ROM.       \TARDIR - Tar file directory containing miscellaneous tar format        archives.  The tar format is a common format used with UNIX        computers to archive files and directory structures.  [an error occurred while processing this directive]