Twichell, David, 2005, GLORIA_GEOG.TIF - Composite GLORIA sidescan sonar image of the Gulf of Mexico (Geographic): Open-File Report 2005-1071, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.This is part of the following larger work.Online Links:
D.C., Twichell, V.A., Cross, Paskevich, V.F., Hutchinson, D.R., Winters, W.J., and Hart, P.E., 2005, GIS of selected geophysical and core data in the northern Gulf of Mexico continental slope collected by the U.S. Geological Survey: Open-File Report 2005-1071, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.Online Links:
This is a Raster data set. It contains the following raster data types:
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest .00000. Longitudes are given to the nearest .00000. Latitude and longitude values are specified in Decimal degrees.
The horizontal datum used is D_WGS_1984.
The ellipsoid used is WGS_1984.
The semi-major axis of the ellipsoid used is 6378137.000000.
The flattening of the ellipsoid used is 1/298.257224.
Sequential unique whole numbers that are automatically generated.
Pixel values contain acoustic reflectivity values normalized to an 8-bit data range (0-255). Low-backscatter is represented by dark tones (low values) and high-backscatter is represented by bright tones (high values). These data have been radiometrically enhanced for better viewing.
508-457-8700 x 2266 (voice)
508-457-2310 (FAX)
dtwichell@usgs.gov
This GIS data layer is a 250 m version of the composite Gulf of Mexico GLORIA sidescan sonar image mosaic that is in a geographic projection using the WGS84 datum. The GLORIA imagery was collected during 1982 and 1985 and covers 490,563 km2 of the Gulf of Mexico in water deeper than approximately 300 m. A discussion of these data can be found in EEZ Scan 85 Scientific Staff (1987).
Paskevich, V.F., 2000, Gulf of Mexico GLORIA sidescan sonar geologic interpretation; ArcView data coverages: Open-File Report 00-019, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center, Woods Hole, MA.Online Links:
Person who carried out this activity:
(508) 548-8700 x2281 (voice)
(508) 457-2310 (FAX)
vpaskevich@usgs.gov
Data sources produced in this process:
Person who carried out this activity:
(508) 548-8700 x2281 (voice)
(508) 457-2310 (FAX)
vpaskevich@usgs.gov
Data sources produced in this process:
Person who carried out this activity:
(508) 548-8700 x2281 (voice)
(508) 457-2310 (FAX)
vpaskevich@usgs.gov
Data sources produced in this process:
Person who carried out this activity:
(508) 548-8700 x2266 (voice)
(508) 457-2310 (FAX)
dtwichell@usgs.gov
Data sources produced in this process:
Paskevich, V., 2000, Gulf of Mexico GLORIA sidescan sonar geologic interpretation: ArcView data coverages: Open-File Report 00-019, U.S. Geological Survey, Woods Hole Science Center.
EEZ-Scan 85 Scientific Staff, 1987, Atlas of the U.S. Exclusive Economic Zone Gulf of Mexico and Eastern Caribbean Areas: Miscellaneous Investigations Series I-1864-A, U.S. Geological Survey, Reston, VA.
All available data were used to compile this mosaic.
All these data were collected using the 6.2-6.8 kHz GLORIA sidescan sonar system. The majority of the data used in this mosaic were acquired using a 45 km total swath width, and the data were originally mapped to a 50 m pixel size.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Use_Constraints:
- Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information.
(508) 548-8700 x2266 (voice)
(508) 457-2310 (FAX)
dtwichell@usgs.gov
Downloadable Data
Although this data set has been used by the U.S. Geological Survey (USGS), no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials.Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
| Data format: | Zip archive containing the GeoTIFF image, associated world file and metadata file. in format TIFF GeoTIFF Size: 0.000 |
|---|---|
| Network links: |
<http://pubs.usgs.gov/of/2005/1071/data/sidescan/imagery/gloria/geog/gloria_geog.zip> |
| Media you can order: |
DVD-ROM
(Density 4.75
Gbytes)
(format UDF)
|
This image is available as a GeoTIFF image with an accompanying world file. To utilize this data, the user must have an image viewer, image processing or GIS software package capable of importing a GEOTIFF image.
(508) 548-8700 x2266 (voice)
(508) 457-2310 (FAX)
dtwichell@usgs.gov
