# Volcanoes of the Wrangell Mountains and Cook Inlet Region, AlaskaSelected Photographs

By Christina Neal, Robert McGimsey, and Michael F. Diggles



Digital Data Series DDS-39

Version 1.1

2001

U.S. Department of the Interior 

Gale A. Norton, Secretary

U.S. Geological Survey 

Charles G. Groat, Director

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index map, Cook Inlet Figure 2.  Map of Cook Inlet volcanoes represented in this collection of images.



## Summary

## Introduction

These images are for use by the interested public, multimedia producers, desktop publishers, and the high-end printing industry.  The digital images are stored in the images folder and can be read across Macintosh, Windows, DOS, OS/2, SGI, and UNIX platforms with applications that can read JPG (JPEG - Joint Photographic Experts Group format), TIF (TIFF  Tagged Image File Format), or PCD (Kodaks PhotoCD (YCC) format) files.  Throughout this publication, the image numbers match among the file names, figure captions, thumbnail labels, and other references.  Also included on this CDROM are Windows and Macintosh viewers and engines for keyword searches (Adobe Acrobat Reader with Search).  At the time of this publication, Kodaks policy on the distribution of color-management files is still unresolved, and so none is included on this CDROM.  However, using the Universal Ektachrome or Universal Kodachrome transforms found in your software will provide excellent color.  In addition to TIF and PhotoCD (PCD) files, this CDROM contains large (14.2x19.5) and small (4x6) screen-resolution (72 dots per inch; dpi) images in JPEG format.  These undergo downsizing and compression relative to the TIF and PhotoCD images.  Each of these resolutions is located in the following folders:



Feel free to use any of these images but please cite the photographer and the U.S. Geological Survey.

## Images



## Accessibility

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## Album in Web-browser (HTML) Format

View the Web-browser album (album.html; 48 KB with links to 19.5 MB of image files)

## Presentations in Acrobat (PDF) Format





### Book in Acrobat (PDF) Format

View the Acrobat book (DDS-39.pdf; 21.2 MB)

If you are viewing this publication on the Web and do not have a fast connection, you can view a small screen-resolution version of the book.  This file will not print well but it will download more quickly.

View the screen-resolution book (DDS-39-WEB.PDF; 1.8 MB).

### Slideshow in Acrobat (PDF) Format

If you are viewing this publication on the Web, download the slideshow.pdf file to your hard disk where you can open it directly with Acrobat Reader.

View the slideshow file (slideshow/slideshow.pdf; 8.3 MB) and download it by right-clicking (PC) or clicking-and-holding or dragging-and-dropping (Mac).

Tip:  To automate slideshow, open Acrobat Reader, select Edit, Preferences, General, Full Screen... and check Advance Every 3 Seconds.  Then open the slideshow.  To exit the slideshow PDF file.  To exit the slideshow at any time, hit the Esc button.

(Old versions of Acrobat Reader such as 4.0 have the automate choice under File, Preferences, Full Screen).

## Individual Images

View the collection of small-screen images (images/JPG/small_screen; 2.1 MB total)
View the collection of large-screen images (images/JPG/large_screen; 17.4 MB total)
View the collection of TIF files; 6-megapixels (images/TIF; 1.72 GB total)
View the collection of PCD files; 6-megapixels (images/PCD; 416 MB total)

## Kodak PhotoCD (PCD) Files:  How to Use the Five Sizes

Each PCD file has five resolutions of images contained within each file.  You can make a choice as to which one you want to use rather than needing to down-sample an image that is larger than you need.  For example, when you open a PCD file in Adobe Photoshop, you get a dialog box where you select the resolution of your choice and then that version of the image opens.

You can also use the largest of the choices, for instance, to make a poster-sized hard copy on a large plotter.  Do this by opening a PCD in high-resolution mode (3072 x 2048 pixels) and setting the image size to 90 dpi and you will get a picture that is nearly two-feet by three-feet.

In the hierarchy of file formats, PhotoCD (YCC) resides above BMP, EPS, GIF, JPEG, MOV, PCX, PICT, PSD, TIF, TIFF, etc., enabling end users to go from YCC to other formats, but not in the other direction without losing image quality.  Each 24-bit color image is stored as 5 resolutions:

1.  Thumbnail [192 x 128 pixels]Contact-sheet-size images for quick previewing of the entire collection.

2. FPO For Placement Only [384 x 256 pixels]A proxy for high-resolution images to determine placement in page-layout programs.

3. Screen Resolution [786 x 512 pixels]Ideal for computer viewing and multimedia projects.

4. HDTV High-Definition Television [1536 x 1024 pixels]Sufficient resolution for high definition TV, newspapers, and high-quality half-page layouts.

5. High Resolution [3072 x 2048 pixels]Provides the printing industry with  resolution sufficient for high-quality full-page layouts at 300 dpi/150 lpi and 24-bit color.

## Captions

View the Captions file for this CDROM (captions.txt; 20 KB)

## Information About this Publication

### Acknowledgments

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USGS Information Services
Box 25286, Federal Center
Denver, CO 80225
telephone: 303-202-4210; e-mail: infoservices@usgs.gov
or calling

1- 888-ASK-USGS (1-888-275-8747)

ISBN 0607-86087-1

Current pricing information is available from http://mapping.usgs.gov/esic/prices/.

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Date created:  July 26, 2001
Last modified:  July 2, 2009
 (mfd)



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