Photographs of the Sea Floor
in Western Massachusetts Bay, Offshore of Boston, Massachusetts,
U.S. Geological Survey Open-File Report 00-427
Benjamin T. Gutierrez, Bradford Butman, and Dann S. Blackwood
This CD-ROM (Compact Disc-Read Only Memory) has been produced in accordance with the ISO 9660 CD-ROM Standard. It was designed for use on computers equipped with the Windows or Windows NT operating system, a CD-ROM reader and a mouse. The text portion of this CD can be read with any html-compatible browser like NETSCAPE(tm), MOSAIC(tm), or INTERNET EXPLORER(tm) by opening the "start.htm" file included in the root directory of the CD-ROM. The figures that accompany this CD-ROM are in the .jpg or .pdf format. To view .pdf files a free copy of Adobe Acrobat Reader is available at www.adobe.com. The GIS data can be explored by using the ArcView project file "wmb_seds.apr". The ArcView 3.2 project file loads all data available including grids and imagery and, therefore, requires a system with at least a 10x CD-ROM reader and a 200Mhz processor.
The bottom photographs on this CD-ROM may be viewed and accessed via table, using ArcView, or as individual JPEG images. These options are also explained in the text (go to the CD-ROM, click on start.htm) along with how the photographs were obtained.
I. Using Table 1
Table 1 is organized by quadrangle number and linked to station pages that contain the photographs obtained at each station. Table 1 can be accessed in the Table of contents under "Appendix I – Station Pages", in the folder "mb_pages", or through hot-links in the text of the data report. To view thumbnails of the pictures, click on the desired station number in Table 1. Station pages reveal the station location and thumbnails of the bottom photos taken at each station. To view a larger image of each picture, click on the thumbnail. Figure 1 shows the station locations. The sediment grain size analysis results are summarized in a table at the bottom of the page. The lack of a sediment results table in a particular station web page indicates that a sediment sample was not taken or recovered at that location.
II. Using ArcView 3.2 (or higher)
The locations of the photos may be viewed over a shaded relief or backscatter intensity image of Massachusetts Bay using ArcView 3.2 or higher. Using ArcView allows the user to zoom to see the location of the images in relation to each other, and sea-floor properties. The ArcView project file "wmb_seds.apr" is located in the mbaygis directory, found in the top-level directory of this CD-ROM. The images can be viewed from within the ArcView project using a hotlink (highlight the sta_loc.shp theme, select the lightening bolt tool, and click on the sta_loc.shp marker to bring up thumbnails of the photos at that station. Double click on an image to view a larger version).
To set the hotlink mechanism between Arcview and the web-browser, the following modifications are necessary:
A. Define the global variable “MBIMAGE”
1. For Windows 3.x or Windows 95/98 users:
Edit the autoexec.bat file located on drive C: (usually c:\autoexec.bat) and add the following line:
SET MBIMAGE = (Use the drive letter assigned to your CD-ROM drive):\mbaygis
Example: if the CD-ROM is the E drive, "SET MBIMAGE = E:\mbaygis"
Once the CD-ROM path variable has been added to your autoexec.bat file, reboot the system.
2. For Windows NT users:
Go to Settings, Control Panel, System, and click
on the Environment tab. In the Variable box, enter
MBIMAGE. In the Value box enter (CD-ROM drive letter):\mbaygis. For example, for a system
with the CD-ROM drive assigned the letter E, set the Value to E:\mbaygis. If the CD is
downloaded to a hard drive, set Variable to MBIMAGE and Value to the location of the
mbaygis folder (i.e.C:\gisdata\mbaygis).
3. For Windows 2000 users:
Go to Settings, Control Panel, System, Advanced tab,
Environment Variables and select new. In
the Variable Name box enter MBIMAGE. In the Variable Value box enter (CD-ROM drive
letter):\mbaygis (for example, if your CD-ROM drive is assigned the letter E, set the Variable
Value to E:\mbaygis). If the CD is downloaded to a hard drive, set the Variable Value to the
location of the mbaygis folder (i.e. C:\gisdata\mbaygis).
B. Check the location of your browser and modify the ArcView Script (if necessary)
Two scripts have been included in the Arcview project file (link2net.ave and link2exe.ave) to activate and transfer information to Netscape (link2net.ave) or Microsoft Internet Explorer (link2exe.ave). These scripts must be modified to reflect the path to the browser location on your computer through the following steps:
1. Determine the location of the web-browser (Netscape, Explorer, or other).
2. Open the ArcView project file "wmb_seds.apr" located in the mbaygis directory found in the top-level directory of this CD-ROM
3a. To use Netscape as your browser, open the script "link2net.ave" and adjust the path name in the following line:
3b. To use Explorer as your browser, open the script "link2exe.ave" and adjust the path name in the following line:
System.Execute("C:\Program Files\Plus!\Microsoft Internet\Iexplore.exe"++theVal)
3c. To use a browser other than Netscape or Explorer, substitute the path to the browser in either script.
4. Compile the script in Arcview by clicking on the "check" icon on the tool bar at the top of the scripts window. Do not to run the script in the script window (an error message will result). ArcView will utilize the browser in the script that is left highlighted.
C. Setting the Script to run in a View
If you choose Netscape as your browser, no other modifications are necessary to ArcView. If you choose Internet Explorer (or another browser) as your browser, the script must be implemented. Highlight the View and select Theme Properties. Along the left side of the GUI scroll until to the "Hotlink" icon and click on it. Under Field, select "Webadd". Under Predefined Action, select "link to user script". Under script, select the name of the script just compiled that contains the correct path to your browser. Unless the CD is saved to the users hard drive, these changes cannot be saved and will have to be re-implemented for each use of the CD. Details on how the script was created and implemented can also be found in the ArcView help files using the keyword "hotlinks".
D. Viewing Images
Once the above changes are made, view the photographs in ArcView. Open the "wmb_seds.apr" project file in the directory "(CD-ROM Drive):\mbaygis". The locations of the sampling stations (sta_loc.shp), the locations of each picture (photos.shp), the locations of the grab samples (grabs.shp) and the video transects (video.shp) are shown for each station. To view thumbnails of all the pictures at a station, highlight station location shape file (sta_loc.shp), select the hotlink button (lightening bolt) and click on the desired station location marker on the Arcview map coverage (note that the bottom tip of the lightening bolt icon must be positioned over the station marker). To view a larger image of each picture, click on the picture thumbnail. Note that the individual photo locations (photos.shp) are not hot-linked, but the images are in sequential order from the beginning of the transect to the end. The dots showing the navigation points in the video survey (video.shp) show the position of the camera every 10-seconds.
III. Individual JPEG images
Each photo is stored as a JPEG file in the folders created for each sampling station. The photo file name is listed below each thumbnail on each station page. Within each station folder (found in the "mb_pages" folder in the "mbaygis" directory), a web page called "index.htm" will bring up a master page for each station. Clicking on the photo thumbnails on the station pages will open the picture files.
Back to the table of contents
U.S. Department of the Interior, U.S. Geological Survey
Maintained by Publishing Services
Last modified: 01:33:28 Fri 11 Jan 2013
Privacy statement | General disclaimer | Accessibility