File: DOS_MENU.TXT
Date: September 7, 1995


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INTRODUCTION TO THE MENU SYSTEM

This CD-ROM includes a text-based user interface menu system for MS-DOS
compatible computers.  The interface is designed to facilitate access to, 
and use of, all text files on this disc.  To invoke the user interface
from the system prompt, change the active drive to the CD-ROM device and
enter:   DRG  (in either uppercase or lowercase letters).

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MENU SELECTIONS

When the user invokes the MAIN MENU by entering 'DRG' at the system
prompt, the options are:

         (G)etting Started
         Menu System (I)nformation
         (A)bout This Disc
         Raster Data (S)pecifications
         (D)RG Product Information
         (V)iewing Software
         (P)ortable Document Format (PDF)
         USGS Points of (C)ontact
         <ESC> to exit

There are two methods for retrieving the desired text files using the
menu system.  The first method involves highlighting the desired option by
using the keyboard cursor arrows.  After highlighting a selection, press
the ENTER or RETURN key and the desired file will be displayed in ASCII
text.  The second method involves typing the highlighted letter in the
title of the desired option.

After the text file has been reviewed, pressing the ENTER or RETURN key
takes the user back to the MAIN MENU.  At this point, other text files can
be referenced, or the <ESC> key can be pressed to take the user back to
the system prompt.

"Raster Data Specifications", "DRG Product Information", "Viewing
Software", and "Portable Document Format (PDF)" are guides to topic
specific sub-menus.
          

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DESCRIPTION OF MENU OPTIONS

(G)etting Started

Displays the HOW2USE.TXT file containing information about (1) the disc
directory structure, (2) a brief description of all text files, and (3)
information about the location of all text and data (image) files.


Menu System (I)nformation

Displays the DOS_MENU.TXT file containing information about the menu
system, including instructions about its use.


(A)bout This Disc

Displays the README.TXT file containing fundamental information about
the DRG product, including disc disclaimers, a summary of the DRG program,
USGS points of contact, and a general description of the DRG.


Raster Data (S)pecifications

Allows the user to select any of the following options:

         (G)eoTiff Data Specifications

         Displays the GEOTIFF.TXT file containing the technical           
         specifications for GeoTIFF Revision 0.2.

         (T)IFF 6.0 Data Specifications

         Displays the TIFF_60.TXT file containing the technical           
         specifications for TIFF Revision 6.0.

         (D)RG Data Standards

         Displays the DRG_STD.TXT file containing the Draft Standards     
         for Digital Raster Graphics and Metadata Template.


(DRG) Product Information

Allows the user to select any of the following options:

         DRG (N)aming Convention

         Displays the DRG_NAME.TXT file describing the Data Set Name      
         (DSN) convention applied to all USGS DRG images on this disc.

         DRG Map (I)ndex Images

         Displays the MAPINDEX.TXT file describing the referencing        
         capabilities of the Map Index images provided on this disc.  

         (L)ist/Size of DRG Image Files

         Displays the DRG_LIST.TXT file itemizing (1) quadrangle          
         name, (2) map scale, (3) southeast corner quadrangle coordinates 
         in latitude and longitude, (4) data set name, and (5) file size, 
         in bytes, for each DRG image on this disc.

         DRG (P)ackaging

         Displays the DRG_PKG.TXT file explaining the standard            
         and alternate packaging procedures for DRG products on 
         CD-ROM.


(V)iewing Software

Allows the user to select the following options:

         Aerial (V)iew Lite

         Allows the user to select either the Aerial View Lite            
         Information option to display the AV_LITE.TXT file or            
         the Aerial View Lite Installation option to load the viewing     
         software.

         (A)rcView 1.0

         Allows the user to select either the ArcView 1.0 Information     
         option to display the ARC_VIEW.TXT file or the ArcView 1.0       
         Installation option to load the viewing software.


(P)ortable Document Format (PDF)

Allows the user to select the following options:
         
         (A)bout PDF Files

         Displays the file ACROBAT.TXT.  This file describes the Acrobat
         reader program, its installation, and information about .PDF    
         files.

         (I)nstall Adobe Acrobat Reader 2.0

         Installs Adobe Acrobat Reader to a hard drive.


USGS Points of (C)ontact

Displays the USGSINFO.TXT file outlining USGS points of contact for the
DRG program and information about the nationwide network of Earth Science
Information Centers (ESIC).

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