Publication_Place: U.S. Geological Survey, Woods Hole, MA
Publisher: USGS Coastal and Marine Geology Team
Description:
Abstract:
This image is an enlarged, detailed area from the Gulf of Mexico GLORIA
sidescan sonar mosaic. The image was co-registered with SeaMARC 1A sidescan
sonar data collected during R/V FARNELLA 90-3 cruise.
Purpose:
This GIS overlay is a component of the U. S. Geological Survey, Woods Hole
Field Center's, Gulf of Mexico ArcView GIS database. The Gulf of Mexico
GIS database is intended to organize and display USGS held data and provide
on-line (WWW) access to the data and/or metadata.
Supplemental_Information:
Two images of the 25 m GLORIA sidescan sonar data are available for the
study area. They are identical with the exception that one image has been
radiometrically enhanced for better viewing.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19820202
Ending_Date: 19850929
Currentness_Reference: data collection
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -86.6027
East_Bounding_Coordinate: -84.9864
North_Bounding_Coordinate: 26.9000
South_Bounding_Coordinate: 26.1001
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: Woods Hole Field Center
Theme_Keyword: Gulf of Mexico database
Theme_Keyword: Exclusive Economic Zone
Theme_Keyword: EEZ
Theme_Keyword: GLORIA
Theme_Keyword: sidescan sonar
Theme_Keyword: sidescan sonar mosaic
Theme_Keyword: composite mosaic
Theme_Keyword: TIFF
Theme_Keyword: TIF
Theme_Keyword: JPG
Theme_Keyword: Geologic Long-Range Inclined Asdic
Theme_Keyword: Geotiff
Theme_Keyword: GEOTIFF
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: Gulf of Mexico
Place_Keyword: U.S. EEZ
Place_Keyword: U.S. Exclusive Economic Zone
Access_Constraints: None
Use_Constraints:
The U.S. Geological Survey must be referenced as the originator of the
dataset in any future products or research derived from these data.
Publication_Place: U.S. Geological Survey, Reston, VA
Publisher: U.S. Geological Survey, Office of Energy and Marine Geology
Type_of_Source_Media: CD-ROM
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19880202
Ending_Date: 19880224
Source_Currentness_Reference: data collection
Source_Citation_Abbreviation: I-1864-A,B
Source_Contribution:
Raw imagery of GLORIA data may be retrieved from this CD-ROM. The user
must note the number of pixels (samples) and lines contained in the data
set to convert the raw imagery to a useable image format. The information
can be found in the 'lbl' file associated with the image file.
Process_Step:
Process_Description:
A new, blank georeferenced database was created utilizing the PCI Remote
Sensing software. This 'pix' file was defined using the maximum extents
of the two required, adjacent 50m GLORIA mosaics. The GLORIA images original
projection (Albers Equal Area), resolution, and datum (Clarke 1866) were
used to define the new 'pix' file.
The two raw (BIL) images, mos13.raw & mos14.raw, were imported and
placed in the PCI 'pix' database by specifying their starting line and
pixel coordinates in the new database.
Utilizing the PCI Remote Sensing software, a corresponding subarea of the
GLORIA data was extracted and added to the existing utme00.pix file. This
process extracted a selected area of the GLORIA data that fell within the
defined SeaMARC1A Mississippi Fan study area. Coincident to the sub-area
being extracted, the image was re-projected to UTM. The final, geo-referenced
image was added to the utme00.pix database where the completed SeaMARC1A
mosaic had been placed.
The completed 25 m Gulf of Mexico GLORIA sidescan sonar data detail area
was exported from the PCI 'pix' database as a GEOTIFF image with an associated
ARC "world" file.
The completed and radiometrically enhanced 25 m Gulf of Mexico GLORIA sidescan
sonar data detail area was exported from the PCI 'pix' database as a GEOTIFF
image with an associated ARC "world" file.
The completed 25 m Gulf of Mexico GLORIA sidescan sonar data detail area
was exported from the PCI 'pix' database as a JPG image with an associated
ARC "world" file.
The completed and radiometrically enhanced 25 m Gulf of Mexico GLORIA sidescan
sonar data detail area was exported from the PCI 'pix' database as a JPG
image with an associated ARC "world" file.
Resource_Description: gloria image in either TIF or JPEG format
Distribution_Liability:
Although this derived data set and it's lineage dataset have been used
by the 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.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: TIFF
File_Decompression_Technique: No compression applied
Transfer_Size: 21847KB
Digital_Transfer_Option:
Offline_Option:
Offline_Media: CD-ROM
Recording_Capacity:
Recording_Density: 650
Recording_Density_Units: Mbytes
Recording_Format: ISO 9600
Compatibility_Information:
The user must have a system with a CD-ROM capable of reading an ISO-9660
standard CD-ROM disk. To browse the information contained on this disk,
the user must also have a current version of WWW browser available.
Digital_Form:
Digital_Transfer_Information:
Format_Name: JPEG
File_Decompression_Technique: No compression applied
Transfer_Size: 3860KB
Digital_Transfer_Option:
Offline_Option:
Offline_Media: CD-ROM
Recording_Capacity:
Recording_Density: 650
Recording_Density_Units: Mbytes
Recording_Format: ISO 9600
Compatibility_Information:
The user must have a system with a CD-ROM capable of reading an ISO-9660
standard CD-ROM disk. To browse the information contained on this disk,
the user must also have a current version of WWW browser available.
Fees: none
Technical_Prerequisites:
An image viewer, image processing or GIS software package capable of importing
a GEOTIFF or JPEG format file. If the georeferencing information cannot
be automatically imported from the image file, the user may wish to obtain
the georeferencing information contained in a separate file, gloria.txt,
in the data/imagery/raw and data/imagery/enhanced directory.
