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1_README.TXT
2000 Multibeam Sonar Survey of Crater Lake, Oregon: Data, GIS, Images, and Movies
By James V. Gardner and Peter Dartnell
Digital Data Series DDS-72
2001
U.S. Department of the Interior
Gale A. Norton, Secretary
U.S. Geological Survey
Charles G. Groat, Director
QUICK START
Most computers with web browsers can read this CD-ROM, including, PCs running Windows(R) 95/98/2000 or higher, or Windows NT(R) 4.0 or higher, UNIX, and Macintosh(R). First, start the web browser and then open the "index.htm" file in the top directory of this CD-ROM. Only PCs running Windows 98+/NT/2000 can run the ESRI(R) ArcExplorer(R) Project on this CD-ROM.
INTRODUCTION
In the summer of 2000, the U.S. Geological Survey, Pacific Seafloor Mapping Project in cooperation with the National Park Service and the Center for Coastal and Ocean Mapping, University of New Hampshire, used a state-of-the-art multibeam sonar system to collect high-resolution bathymetry and calibrated, co-registered acoustic backscatter to support both biological and geological research in the area (aquatic biology, geochemistry, volcanic processes, etc). This survey collected over 16 million soundings and the resulting data portrays the bottom of Crater Lake at a spatial resolution of 2 meters. This CD-ROM is published for the scientific community, the general public, and as a teaching tool. This CD-ROM contains the raw multibeam bathymetry and backscatter data as well as an ArcExplorer 2.0 project for the scientific community to use in research. Computer-generated images and a fly-by movie allow any user to visualize the lake floor. A QuickTime(R) movie and photographs of the helicopter operations shows how the multibeam survey took place and a list ofCrater Lake publications and related websites can be used for further Crater Lake research and general interest.
CONTENTS OF CD-ROM
To the left side of all the browser pages on this CD-ROM is a table of contents. The contents include,
INTRODUCTION - Brief history of Crater Lake and Mount Mazama, shows a location map, and briefly explains why and how the Crater Lake mapping survey took place.
ARCEXPLORER - ArcExplorer 2.0 project showing both the multibeam bathymetry and backscatter data from Crater Lake. ArcExplorer is a freeware, lightweight GIS software package published by ESRI.
PERSPECTIVE VIEWS - Selected perspective views of the bottom of Crater Lake and surrounding caldera walls generated from the multibeam survey data. Each view is accompanied by a geologic interpretation and a 300dpi TIFF image that can be downloaded by the user.
FLY-BY MOVIE - A QuickTime movie that simulates a flight around the bottom of Crater Lake to view the deepest parts of the lake, Wizard Island, Merriam Cone, and underwater landslides.
HELICOPTER MOVIE - A QuickTime movie of the helicopter transporting the RV Surf Surveyor into Crater Lake. At the time of the survey there was no boat on the lake capable of conducting the multibeam survey. The survey vessel, RV Surf Surveyor, could not be towed down the Cleetwood Cove trail, the only trail down to the lake surface and a 200-m (650- ft) elevation change. The RV Surf Surveyor had to be transported to and from the lake surface by a Chinook helicopter operated by the U.S. Army Reserves.
DATA - Multibeam bathymetry and backscatter data in XYZ format and ArcInfo GRID format with acompanying metadata.
PHOTOGRAPHS - A selection of thumbnail photographs taken by the survey crew during the helicopter transport of the survey vessel into and out of Crater Lake.
PUBLICATIONS - A reference list of selected Crater Lake publications.
LINKS - Selected links to other websites about Crater Lake.
SYSTEM REQUIREMENTS
This CD-ROM was produced in accordance with the ISO 9660 Level 2 standard and Apple Computer's(R) Hierarchical File System (HFS) standard. The data and text this CD-ROM require either a UNIX workstation, Macintosh or compatible computer, or IBM(R) or compatible personal computer, all equipped with a CD-ROM drive.
Windows
- Intel(R) Pentium(R) processor
- Microsoft(R) Windows 95 OSR 2.0, Windows 98 SE, Windows
Millennium, Windows NT(R) 4.0 with Service Pack 5, or
Windows 2000
- 64 MB of RAM
- VGA color monitor that can display 256 colors (16.7
million colors recommended)
Macintosh
- PowerPC(R) processor
- 64 megabytes RAM
- Mac OS software version 8.6 or higher
- 13-inch color monitor that can display 256 colors (16.7
million colors recommended)
UNIX
- Almost any UNIX workstation should be capable of
manipulating these html and data files in this
publication. Because QuickTime Movie Player is not
available for UNIX computers, the movie files on this
CD-ROM cannot be displayed on these machines.
All platforms
- QuickTime Movie Player 5 for Macintosh and Windows is
needed to display the movie files on this CD-ROM. It
is available from http://quicktime.apple.com for free.
- GIS software capable of reading ARC/INFO GRID or XYZ
(Longitude, Latitude, Value) text format is needed to
take full advantage of the data in this publication.
ARCEXPLORER SOFTWARE (WINDOWS 98+/NT/2000 ONLY)
The "software" directory on this CD-ROM contains an installer for ESRI ArcExplorer for Windows. The installer is a self-extracting archive that opens in the directory you specify. Once opened, run the Setup Wizard program to proceed. You can use the installer provided on this disc or download the latest version of ArcExplorer free via the Internet from the ESRI homepage on the World Wide Web at http://www.esri.com/
FILES ON CD-ROM
1_README.TXT
Table of Contents (sitemap.txt)
HTML files
GIF Images
QuickTime Movies
ARC/INFO GRID files
XYZ ASCII files
Metadata
TIFF Images
ESRI ArcExplorer Project
Autorun and display files for Windows.
FOR SALE BY
USGS Information Services
Box 25286
Denver Federal Center
Denver, CO 80225
Telephone: (888) ASK-USGS
ISBN: 0-607-98413-9
This report and any updates to it are available on line at http://geopubs.wr.usgs.gov/dds/dds-72/
The bibliographical reference for this publication is:
Gardner, James V., and Dartnell, Peter, 2001, 2000
Multibeam sonar survey of Crater Lake, Oregon: Data,
GIS, images, and movies: U.S. Geological Survey
Digital Data Series DDS-72 (CD-ROM).
DISCLAIMERS
This Compact Disc-Read Only Memory (CD-ROM) publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof.
Although all data and software published on this CD-ROM have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and (or) the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of this data, software, or related materials.
Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the