| What
is the Coastwide 2001 Imagery? |
Color infrared imagery used for analysis and assessment
for research need's in coastal Louisiana by the USGS
National Wetlands Research Center in Lafayette, Louisiana.
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| What
areas of the state are covered? |
 Most
of Louisiana south of 30 deg 30' north latitude. This
parallel runs through Pontchatoula, Baton Rouge, Eunice,
and Kinder. Click on the image at the right to view a
graphic representing the covered areas in dark green.
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| How
were the images made? |
Every frame from the three flights were scanned (both
9x9 and 9x18 formats) using a Vexcel Imaging scanner.
The images were scanned at 600 dpi as TIFFs and resampled
to 300 dpi and stored as jpeg files. Not every frame is
included in the distribution of the imagery. |
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| What
programs can I use to view the images? |
The
files are jpg files. Many different programs can display
the images. Adobe Photoshop, Microsoft Internet Explorer,
Netscape Navigtor, Intergraph Geomedia, and ESRI ArcGIS
are some of the programs that can display these files. |
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| How
can I convert the JPG file into a TIFF file? |
Yes, programs such as Adobe Photoshop will allow you to
save as a TIF file, but the loss in image quality due
to JPG image compression can not be recovered. |
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| Are
the images rectified? |
No. |
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| How
do I download the files? |
Atlas
provides two ways to download these files
By using a downloader at http://atlas.lsu.edu/coastwide2001,
you can see an index map of the images. You can locate
the images by roll number, frame number, or flight number.
By using "Search Atlas" at
http://atlas.lsu.edu/search
with the overlap button clicked, any image overlapping
the selected will be found.
The LACoast web site has an index map
at http://www.lacoast.gov/maps/lacw2001/index.htm
for downloading the images. |
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| From
where are the images being downloaded? |
The images are not stored on Atlas but on the LACoast
web site. Atlas has links to these images when you select
a frame from either the downloader or the search page. |
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| Why
doesn't Atlas download a Winzip archive file for these
images as it does most other datasets? |
The
images are stored on the LACoast web site as a single
JPG image file. Since JPG files are recognized by the
web browsers as images to be displayed, clicking on a
link will display the actual image instead of allowing
the user to download the image file. To download the image
file without displaying it, right click on the link and
use the "Save Target As..." option. For example,
in the Coastwide2001 download, right click on the download
button  when
it appears for each frame on the left side of the page.
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| Is
there metadata for the Coastwide 2001 Images? |
Yes,
to view the metadata, click
here. This metadata file can also be found on the
LACoast web site at http://www.lacoast.gov.
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