What
is GAP data?
For what can it be used?
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The USGS has a site dedicated to the National GAP Analysis
Program. Visit http://www.gap.uidaho.edu/default.htm
to find the answer to these questions and more. |
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Who
created the GAP data for Louisiana?
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The USGS National Wetlands Research Center (NWRC) with
others created the GAP data for Louisiana. For information
specific to GAP data for Louisiana, visit http://sdms.nwrc.gov/gap/gap2.html
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| How
can I view the GAP data? |
The GAP data is in a TIF file. Any program that can read
a TIF file can view the GAP data. You can also see the
GAP data online by using Atlas's Rasterviewer
by setting its background to "GAP Data" |
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| Can
the GAP data be used with a GIS? |
Yes!
The TIF images are registered. ESRI world files (.tfw)
are included. Also, Intergraph Geomedia coordinate system
files (.csf) have been added. |
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| What
is the projection of the GAP data? |
The TIF files are in UTM zone 15 north, North American
Datum 1927, ground units of meters. |
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| What
do the colors of the GAP data mean? |
Each color stands for a category. See the legend in "gapleg.jpg"
file and a a description of each category in "descrip.txt".
Both files are found in each downloadable Winzip file.
The legend is also displayed under the map when GAP data
is displayed as the background for Atlas's Rasterviewer. |
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| What
are the limits of the usage of the GAP data? |
Every map has its limit for usage. For more information
about the limit of the GAP data, visit http://sdms.nwrc.gov/gap/disclaim.html
to see the disclaimer. (This file has also been included
with each Winzip archive file.) |
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| Where
can I get more information about GAP data? |
One way to get more information is to visit the GAP page
on the NWRC site http://sdms.nwrc.gov/gap/gap2.html.
Another way is to review the GAP FAQ file by clicking
on lagap.html.
This file is also included with every downloadable Winzip
archive file. |
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