Mapping the floor of Lake Mead (Nevada and Arizona): Preliminary discussion and GIS data release, USGS Open-File Report 03-320

SYSTEM REQUIREMENTS

WWW Browsers:
The data and information on this DVD-ROM are formatted for access and download by use of WWW information browsers (e.g., Internet Explorer, Netscape, Opera). Hyperlink references in this report to additional Internet-resident information will not function if your computer is not actively connected to the Internet (WWW) via ISP or online LAN. These web links are functional at publication, but there can be no guarantee that they will not change or be discontinued. The disk has been tested on systems utilizing the following operating systems: Windows 2000/XP, Macintosh and UNIX.

GIS:
An Environmental Systems Research Institute (ESRI) ArcView 3.2 Geographic Information System (GIS) project files, data_sa.apr and data_nosa.apr, reside in the top-level directory of this DVD. All associated GIS files are contained within the data directory. The user must have a copy of ESRI ArcView 3.2 in order to view the project files. Visit the ESRI website (http://www.esri.com) for information concerning this, and other software. Additionally, the user must also have the ESRI Spatial Analyst extension in order to view the data_sa.apr project file. For those users who do not have ArcView 3.2 or later, the individual GIS data files can still be viewed with a compatible GIS viewer, or a free GIS viewer - ArcExplorer. This GIS data viewer is available from ESRI (http://www.esri.com). Please note that the ArcExplorer software is limited to the Microsoft Windows operating systems and some UNIX operating systems.

PDF:
A PDF version of the document is available in the htmldocs/pdf directory. PDF versions of the data acquisition logbooks are contained in the data/pdflogs directory. In order to view the files in the PDF format, a free copy of Adobe Acrobat Reader can be downloaded from http://www.adobe.com.

ZIP files:
This DVD contains several files compressed using the Windows program WINZIP v8.0. For those users who do not have software capable of uncompressing files of this format, software may be obtained from www.winzip.com or www.pkzip.com.

Image files:
Image files of the sidescan-sonar mosaics are available as MrSid images and can be viewed outside the GIS with a free image viewer available from LizardTech.

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