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This
Open-File Report contains the bathymetry and acoustic backscatter data from
the 1997 and 2002 multibeam sonar surveys of the Outer Continental Shelf,
Northwestern Gulf of Mexico. The data are provided in two formats (XYZ and ArcInfo GRID) that can be used in a number of GIS and other software packages.
XYZ format
The data are available in comma delimited XYZ (x-coordinate, y-coordinate, value) format.
Instructions
1. Click on the links below to download the files.
2. Uncompress the files. The files are compressed with WinZip 7.0.
3. The uncompression will result in a new comma delimited file (sbbathy.xyz, sbmos.xyz).
Disclaimer:
Downloading files from the Internet can sometimes be problematic. Different
web browsers and operating systems act differently. The instructions above
may vary from system to system or may not work at all.
| Stetson Bank |
|
| sbbathy.zip |
value = depth: min = -16.92m, max = -62.69m, 5-m spatial resolution, 4Mb compressed, 20Mb uncompressed |
| sbmos.zip |
value = DN: min = 63.92m, max = 214.88m, 5-m spatial resolution, 4Mb compressed, 20Mb uncompressed |
| West Flower Garden Bank |
|
| wfbathy.zip |
value = depth: min = -16.31m, max = -179.13m, 5-m spatial resolution, 31Mb compressed, 153Mb uncompressed |
| wfmos.zip |
value = DN: min = 0.0m, max = 241.36m, 5-m spatial resolution, 32Mb compressed, 147Mb uncompressed |
| East Flower Garden Bank |
|
| efbathy.zip |
value = depth: min = -18.21m, max = -146.66m, 5-m spatial resolution, 24Mb compressed, 124Mb uncompressed |
| efmos.zip |
value = DN: min = 27.90m, max = 231.10m, 5-m spatial resolution, 26Mb compressed, 119Mb uncompressed |
| MacNeil Bank |
|
| mnbathy.zip |
value = depth: min = -48.67m, max = -117.93m, 4-m spatial resolution, 94Mb compressed, 558Mb uncompressed |
| mnmos.zip |
value = DN: min = 17.0m, max = 244.83m, 4-m spatial resolution, 80Mb compressed, 502Mb uncompressed |
| Bright and Rankin Banks |
|
| brbathy.zip |
value = depth: min = -33.17m, max = -188.05m, 4-m spatial resolution, 107Mb compressed, 587Mb uncompressed |
| brmos.zip |
value = DN: min = 7.0m, max = 243.18m, 4-m spatial resolution, 84Mb compressed, 527Mb uncompressed |
| Geyer Bank |
|
| gybathy.zip |
value = depth: min = -39.11m, max = -224.22m, 4-m spatial resolution, 38Mb compressed, 202Mb uncompressed |
| gymos.zip |
value = DN: min = 10.00m, max = 245.72m, 4-m spatial resolution, 29Mb compressed, 190Mb uncompressed |
| Bouma, Rezak, Sidner, and McGrail Banks |
|
| mbbathy.zip |
value = depth: min = -32.24m, max = -242.26m, 4-m spatial resolution, 115Mb compressed, 644Mb uncompressed |
| mbmos.zip |
value = DN: min = 17.0m, max = 243.19m, 4-m spatial resolution, 118Mb compressed, 737Mb uncompressed |
| Sonnier Bank |
|
| snbathy.zip |
value = depth: min = -18.69m, max = -64.71m, 4-m spatial resolution, 26Mb compressed, 116Mb uncompressed |
| snmos.zip |
value = DN: min = 37.0m, max = 239.84m, 4-m spatial resolution, 24Mb compressed, 154Mb uncompressed |
| Alderdice Bank |
|
| adbathy.zip |
value = depth: min = -60.99m, max = -106.86m, 4-m spatial resolution, 39Mb compressed, 234Mb uncompressed |
| admos.zip |
value = DN: min = 63.0m, max = 240.0m, 4-m spatial resolution, 34Mb compressed, 210Mb uncompressed |
| Jakkula Bank |
|
| jkbathy.zip |
value = depth: min = -61.67m, max = -252.27m, 4-m spatial resolution, 41Mb compressed, 224Mb uncompressed |
| jkmos.zip |
value = DN: min = 74.33m, max = 238.81m, 4-m spatial resolution, 32Mb compressed, 190Mb uncompressed |
Projection Information
Geographic
Units: Decimal Degrees
Zunits: NO [backscatter]; Meters [bathymetry]
Datum: WGS84
FGDC Compliant Metadata for ASCII XYZ format
FAQ
HTML
TEXT
ArcInfo GRID format
The data are also available in ArcInfo GRID format that can
be used directly in ESRI ArcInfo,
ArcView, or any other GIS or remote sensing software package
that supports ESRI GRID format. In ArcView, the GRID files will
be most useful with the Spatial Analyst Extension.
Disclaimer: Downloading files from the Internet can
sometimes be problematic. Different web browsers and operating
systems act differently. The instructions below may vary from
system to system or may not work at all.
One
known problem is sometimes Netscape Navigator automatically changes the .tgz
suffix to .tar during the download. If this happens change the .tar suffix
back to .tgz after the download. Double click on the file and Winzip should
start up.
Instructions
1. Click on each link below to download the files to the desktop.
2.
Uncompress and unbundle the files. Since ESRI GRIDs are directories of files
the directories have been bundled into a single file for downloading. Each
bundled file is also compressed for faster downloading.
Windows - Double click on each file. Winzip 7.0 will recognize the file is compressed and bundled.
UNIX - Uncompress using "gunzip" then unbundle using "tar xf".
3.
The bathymetry and acoustic backscatter GRID files (i.e sbbathyg and sbmosg)
are contained within each respective folder (sbbathy and sbmos).
| Stetson Bank |
|
| sbbathy.tgz |
value = depth: min = -16.92m, max = -62.69m, 5-m spatial resolution, 2Mb compressed, 4Mb uncompressed |
| sbmos.tgz |
value = DN: min = 63.92m, max = 214.88m, 5-m spatial resolution, 2Mb compressed, 4Mb uncompressed |
| West Flower Garden Bank |
|
| wfbathy.tgz |
value = depth: min = -16.31m, max = -179.13m 5-m spatial resolution, 7Mb compressed, 25Mb uncompressed |
| wfmos.tgz |
value = DN: min = 0.0m, max = 241.36m, 5-m spatial resolution, 7Mb compressed, 25Mb uncompressed |
| East Flower Garden Bank |
|
| efbathy.tgz |
value = depth: min = -18.21m, max = -146.66m, 5-m spatial resolution, 14Mb compressed, 20Mb uncompressed |
| efmos.tgz |
value = DN: min = 27.90m, max = 231.10m, 5-m spatial resolution, 13Mb compressed, 20Mb uncompressed |
| MacNeil Bank |
|
| mnbathy.tgz |
value = depth: min = -48.67m, max = -117.93m, 4-m spatial resolution, 43Mb compressed, 98Mb uncompressed |
| mnmos.tgz |
value = DN: min = 17.0m, max = 244.83m, 4-m spatial resolution, 45Mb compressed, 98Mb uncompressed |
| Bright and Rankin Banks |
|
| brbathy.tgz |
value = depth: min = -33.17m, max = -188.05m, 4-m spatial resolution, 49Mb compressed, 82Mb uncompressed |
| brmos.tgz |
value = DN: min = 7.0m, max = 243.18m, 4-m spatial resolution, 48Mb compressed, 81Mb uncompressed |
| Geyer Bank |
|
| gybathy.tgz |
value = depth: min = -39.11m, max = -224.22m, 4-m spatial resolution, 19Mb compressed, 30Mb uncompressed |
| gymos.tgz |
value = DN: min = 10.00m, max = 245.72m, 4-m spatial resolution, 17Mb compressed, 28Mb uncompressed |
| Bouma, Rezak, Sidner, and McGrail Banks |
|
| mbbathy.tgz |
value = depth: min = -32.24m, max = -242.26m, 4-m spatial resolution, 63Mb compressed, 142Mb uncompressed |
| mbmos.tgz |
value = DN: min = 17.0m, max = 243.19m, 4-m spatial resolution, 68Mb compressed, 138Mb uncompressed |
| Sonnier Bank |
|
| snbathy.tgz |
value = depth: min = -18.69m, max = -64.71m, 4-m spatial resolution, 11Mb compressed, 25Mb uncompressed |
| snmos.tgz |
value = DN: min = 37.0m, max = 239.84m, 4-m spatial resolution, 13Mb compressed, 24Mb uncompressed |
| Alderdice Bank |
|
| adbathy.tgz |
value = depth: min = -60.99m, max = -106.86m, 4-m spatial resolution, 19Mb compressed, 33Mb uncompressed |
| admos.tgz |
value = DN: min = 63.0m, max = 240.0m, 4-m spatial resolution, compressed, 33Mb uncompressed |
| Jakkula Bank |
|
| jkbathy.tgz |
value = depth: min = -61.67m, max = -252.27m, 4-m spatial resolution, 20Mb compressed, 35Mb uncompressed |
| jkmos.tgz |
value = DN: min = 74.33m, max = 238.81m, 4-m spatial resolution, 18Mb compressed, 35Mb uncompressed |
Projection Information
Projection: UTM
Zone: 15
Datum: WGS84
Units: Meters
Zunits: NO [backscatter]; Meters [bathymetry]
FGDC Compliant Metadata for ArcInfo GRID format:
FAQ
HTML
TEXT
|
U.S. Department of the Interior |
U.S. Geological Survey