Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2011 Title: GMX_Q04.TIF - U.S. Gulf of Mexico EEZ GLORIA sidescan-sonar data mosaic (4 of 16) (ACEA, 50 m, Clarke1866) Edition: 1.0 Geospatial_Data_Presentation_Form: remote-sensing image Series_Information: Series_Name: Open-File Report Issue_Identification: 2010-1332 Publication_Information: Publication_Place: Pacific Coastal and Marine Science Center, Menlo Park, CA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: http://pubs.usgs.gov/of/2010/1332/gloria_data/gomex/gmx_q04.zip Larger_Work_Citation: Citation_Information: Originator: Valerie F. Paskevich Originator: Florence L. Wong Originator: John J. O'Malley Originator: Andrew J. Stevenson Originator: Christina E. Gutmacher Publication_Date: 2011 Title: GLORIA Sidescan-Sonar Imagery for Parts of the U.S. Exclusive Economic Zone and Adjacent Areas Edition: 1.0 Series_Information: Series_Name: Open-File Report Issue_Identification: 2010-1332 Publication_Information: Publication_Place: Pacific Coastal and Marine Science Center, Menlo Park, CA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: http://pubs.usgs.gov/of/2010/1332/ Description: Abstract: During February 1982 and again from August 7 to October 22, 1985 the U.S. Geological Survey (USGS) conducted four cruises to cover the U.S. Gulf of Mexico Continental Margin Exclusive Economic Zone (EEZ) seaward of the continental shelf edge. As in earlier EEZ reconnaissance surveys, the USGS utilized the GLORIA (Geological LOng-Range Inclined Asdic) sidescan-sonar system to complete the geologic mapping. The collected GLORIA data were processed and digitally mosaicked to produce continuous imagery of the seafloor. A total of 16 digital mosaics of a 2 degree by 2 degree (or smaller) area with a 50-meter pixel resolution were completed for the Gulf of Mexico region. Purpose: This remote sensing image of the seafloor is 1 of 16 mosaics created from the Gulf of Mexico GLORIA sidescan-sonar data. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19820202, 19850807, 19850905, 19851002 Ending_Date: 19820224, 19850903, 19850929, 19851022 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -88.023262 East_Bounding_Coordinate: -85.977330 North_Bounding_Coordinate: 26.003555 South_Bounding_Coordinate: 23.990473 Keywords: Theme: Theme_Keyword_Thesaurus: General Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Coastal and Marine Geology Program Theme_Keyword: CMGP Theme_Keyword: Woods Hole Science Center Theme_Keyword: WHSC Theme_Keyword: Geological LOng-Range Inclined Asdic Theme_Keyword: GLORIA Theme_Keyword: GeoTIFF image Theme_Keyword: grey scale image Theme_Keyword: backscatter Theme_Keyword: acoustic reflectivity Theme_Keyword: marine geology Theme_Keyword: sidescan-sonar mosaic Theme_Keyword: Exclusive Economic Zone Theme_Keyword: EEZ Theme_Keyword: WHSC serial number 82005 Theme_Keyword: WHSC serial number 85027 Theme_Keyword: WHSC serial number 85028 Theme_Keyword: WHSC serial number 85034 Theme_Keyword: WHSC cruise identifier 82FARN-7 Theme_Keyword: WHSC cruise identifier FRNL 85 LEG 1 Theme_Keyword: WHSC cruise identifier FRNL 85 LEG 2 Theme_Keyword: WHSC cruise identifier FRNL 85 LEG 3 Theme_Keyword: Infobank identifier F-7-82-GM Theme_Keyword: Infobank identifier F-1-85-GM Theme_Keyword: Infobank identifier F-2-85-GM Theme_Keyword: Infobank identifier F-3A-85-GM Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans Theme_Keyword: oceans and estuaries Theme_Keyword: oceans and coastal Theme_Keyword: geoscientificInformation Theme_Keyword: imageryBaseMapsEarthCover Theme: Theme_Keyword_Thesaurus: NASA/Global Change Master Directory (GCMD) Earth Science Keywords, Version 6.0.0.0.0 Theme_Keyword: Oceans > Ocean Acoustics > Acoustic Reflectivity Theme: Theme_Keyword_Thesaurus: NASA/Global Change Master Directory (GCMD) Instrument Keywords Theme_Keyword: ACOUSTIC RECEIVERS Theme_Keyword: GLORIA > Geological Long-Range Inclined ASDIC Theme_Keyword: SIDE-SCAN SONAR Place: Place_Keyword_Thesaurus: General Place_Keyword: Gulf of Mexico Place_Keyword: continental slope Place_Keyword: continental rise Place_Keyword: continental margin Place_Keyword: continental shelf Place_Keyword: Mississippi Canyon and Fan Place_Keyword: Sigsbee Escarpment Place_Keyword: Florida Escarpment Place: Place_Keyword_Thesaurus: NASA/Global Change Master Directory (GCMD) Location Keywords, Version 6.0.0.0.0 Place_Keyword: Ocean > Atlantic Ocean Place_Keyword: Ocean > Atlantic Ocean > North Atlantic Ocean Place_Keyword: Ocean > Atlantic Ocean > North Atlantic Ocean > Gulf Of Mexico 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 as the originator of the dataset. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Florence Wong Contact_Address: Address_Type: mailing and physical address Address: 345 Middlefield Road MS 999 City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Contact_Voice_Telephone: (650) 329-5327 Contact_Facsimile_Telephone: (650) 329-5198 Contact_Electronic_Mail_Address: fwong@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2010/1332/gloria_data/gomex/browse/gmx_q04-thumb.gif Browse_Graphic_File_Description: Thumbnail image showing an overview of the Gulf of Mexico GLORIA mosaic 4. Browse_Graphic_File_Type: GIF Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2010/1332/gloria_data/gomex/browse/gmx_q04.gif Browse_Graphic_File_Description: Browse image showing an overview of the Gulf of Mexico GLORIA mosaic 4. Browse_Graphic_File_Type: GIF Data_Set_Credit: The U.S. Geological Survey (USGS) must be referenced as the originator of the dataset in any future products or research derived from these data. Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535 Cross_Reference: Citation_Information: Originator: EEZ-SCAN 85 Scientific Staff Publication_Date: 1987 Title: Atlas of the U.S. Exclusive Economic Zone, Gulf of Mexico and Eastern Caribbean Areas Edition: 1.0 Series_Information: Series_Name: Miscellaneous Investigation Series Issue_Identification: I-1864-A,B Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: 160 p. Cross_Reference: Citation_Information: Originator: J.V. Gardner (editor) Originator: M.E. Field (editor) Originator: D.C. Twichell (editor) Publication_Date: 2011 Title: Geology of the United States Seafloor: The View from GLORIA Edition: 1.0 Publication_Information: Publication_Place: Cambridge, U.K. Publisher: Cambridge University Press Cross_Reference: Citation_Information: Originator: P.S. Chavez Jr. Publication_Date: 1986 Title: Processing Techniques for Digital Sonar Images from GLORIA Series_Information: Series_Name: Photogrammetric Engineering and Remote Sensing Issue_Identification: Vol. 52, No. 8, August 1986, p. 1133-1145 Publication_Information: Publication_Place: Falls Church, VA 22046 Publisher: American Society for Photogrammetry and Remote Sensing Cross_Reference: Citation_Information: Originator: P.S. Chavez Jr. Publication_Date: 1984 Title: U.S. Geological Survey mini image processing system (MIPS) Series_Information: Series_Name: Open-File Report Issue_Identification: 84-880 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Cross_Reference: Citation_Information: Originator: V. Paskevich Publication_Date: 1996 Title: Digital mosaics of the GLORIA sidescan-sonar data of the Gulf of Mexico Edition: 1.0 Series_Information: Series_Name: Open-File Report Issue_Identification: 96-657 Publication_Information: Publication_Place: Woods Hole Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Other_Citation_Details: 1 CD-ROM Cross_Reference: Citation_Information: Originator: V. Paskevich Publication_Date: 2000 Title: Gulf of Mexico GLORIA sidescan-sonar Geologic Interpretation: ArcView Data Coverages Edition: 1.0 Series_Information: Series_Name: Open-File Report Issue_Identification: 00-019 Publication_Information: Publication_Place: Woods Hole Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Other_Citation_Details: 1 CD-ROM Online_Linkage: http://pubs.usgs.gov/of/of00-019/ Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: There are no attributes associated with a GeoTIFF image. Logical_Consistency_Report: not applicable Completeness_Report: All available imagery were used to create this mosaic. Data were acquired during several cruises using the 6.5 kHz GLORIA sidescan-sonar system and a 45-km total swath width. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Primary navigational control for this survey was by Loran-C supplemented by satellite navigation. Accuracy of location of the navigation fixes is estimated to be better than 100 meters. Lineage: Source_Information: Type_of_Source_Media: digital tape media Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19820202, 19850807, 19850905, 19851002 Ending_Date: 19820224, 19850903, 19850929, 19851022 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: GLORIA pass data Source_Contribution: GLORIA data were logged to magnetic tape in 6-hour portions referred to as "passes". Each completed pass contained a maximum 720 "lines" of data at the usual 30-second pulse repetition rate. Each line consisted of a 1024 byte record that contained the port and starboard returns from a single ping as well as header information. These "passes" contained geometric and radiometric distortions which had to be corrected before they could be digitally mosaicked. Process_Step: Process_Description: The GLORIA "passes" necessary to complete the mosaic were retrieved from magnetic tape. Navigation data were merged into the individual "passes" to update the header information with depth and location coordinates. Source_Used_Citation_Abbreviation: GLORIA pass data Process_Date: 1986 Source_Produced_Citation_Abbreviation: "pass".mrg Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 Contact_Facsimile_Telephone: (508) 457-2310 Process_Step: Process_Description: Slant-Range correction, the first of two geometric corrections, was applied to the "passes". This processing step corrects slant-range to ground-range and removes the water column. Slant-range error is mislocation of pixels in the cross-track direction compared to their proper location on a map. This error occurs due to the way that the sidescan-sonar senses distance to a target. After the slant-range correction has been made, the across-track location of targets is accurate. Source_Used_Citation_Abbreviation: "pass".mrg Process_Date: 1986 Source_Produced_Citation_Abbreviation: "pass".slr Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 Contact_Facsimile_Telephone: (508) 457-2310 Process_Step: Process_Description: A series of radiometric corrections were then applied to the "passes". The first enhancement was used to correct for shading problems that occur in the across-track direction and are a function of attenuation in range distance and transmitter power build-up. Source_Used_Citation_Abbreviation: "pass".slr Process_Date: 1986 Source_Produced_Citation_Abbreviation: "pass".shd Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 Contact_Facsimile_Telephone: (508) 457-2310 Process_Step: Process_Description: The next radiometric enhancement was applied in a two-part filtering process to remove the striped noise that can be found in side-scan sonar image in the across-track direction. The noise was removed by applying two separate boxcar filters: (1) a high-pass filter that will contain the high-frequency component of the image without the noise; and (2) a low-pass filter that will include the low-frequency component of the image without the noise. Source_Used_Citation_Abbreviation: "pass".shd Process_Date: 1986 Source_Produced_Citation_Abbreviation: "pass".hpf Source_Produced_Citation_Abbreviation: "pass".lpf Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 Contact_Facsimile_Telephone: (508) 457-2310 Process_Step: Process_Description: The two filtered images were combined to recreate an image similar to the original but without the noise. Source_Used_Citation_Abbreviation: "pass".hpf Source_Used_Citation_Abbreviation: "pass".lpf Process_Date: 1986 Source_Produced_Citation_Abbreviation: "pass".wco Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 Contact_Facsimile_Telephone: (508) 457-2310 Process_Step: Process_Description: The second geometric correction, aspect-ratio distortion, was applied to the "passes". The aspect-ratio distortion was removed by using the navigation data to compute the distance traveled by the ship. Given the distance traveled, the number of pixels (each representing 50 m) required along the particular segment was calculated. The original pixels were then duplicated the appropriate number of times to fill the space with 50-meter pixels and thus achieve a 1:1 ratio between along-track and across-track distances. The practice of duplication to create a square 50-meter pixel size was followed so that information in the across-track direction would not have to be omitted. Source_Used_Citation_Abbreviation: "pass".wco Process_Date: 1986 Source_Produced_Citation_Abbreviation: "pass".vel Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 Contact_Facsimile_Telephone: (508) 457-2310 Process_Step: Process_Description: The final enhancement, a 2 by 2 low-pass filter for smoothing the images, was applied to the "passes". Because the delta velocity correction typically stretches the imagery 1:2.5 times, a 2 by 2 low-pass filter is applied to the image to smooth and reduce the blockiness that results from the line duplication. The 2 by 2 low-pass filter smoothes out the blockiness introduced into the image without over smoothing and blurring the image. Source_Used_Citation_Abbreviation: "pass".vel Process_Date: 1986 Source_Produced_Citation_Abbreviation: "pass".2b2 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 Contact_Facsimile_Telephone: (508) 457-2310 Process_Step: Process_Description: After the geometric and radiometric corrections were applied, the data were ready for the digital mosaicking. The necessary segments of processed data, each representing about 6-hours of data acquisition, were spliced end-to-end to make continuous swaths for portions of the tracklines where the ship's heading remained generally constant and passed through the mosaic area. The segments were tone-matched by adjusting the average brightness to minimize the tonal contrast at the seams where they were joined. Latitude, longitude, and heading were determined along the trackline of each continuous segment of data at the start, end, and two intermediate points. These four control points, with eight additional points that were computed for the edges of the image segment, were used to position the segment within the map grid. Source_Used_Citation_Abbreviation: "pass".2b2 Process_Date: 1986 Source_Produced_Citation_Abbreviation: gmx_q04_line"n" Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 Contact_Facsimile_Telephone: (508) 457-2310 Process_Step: Process_Description: When the individual trackline segments had been georeferenced, the next step was to digitally stencil the segments to remove unwanted data (i.e. noise). Interactively, a line was drawn on a video display outlining the portion of each image segment to be retained while comparing it to adjacent segments. Then all pixels outside the area enclosed by the line were converted to zero values, thereby retaining only that portion of the image desired. Finally, each stenciled segment was mosaicked to adjacent segments, sequentially building the composite map. In this way a digital file was created with the desired map projection for each imagery sheet (mosaic). Source_Used_Citation_Abbreviation: gmx_q04_line"n" Process_Date: 1986 Source_Produced_Citation_Abbreviation: gmx_q04 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 Contact_Facsimile_Telephone: (508) 457-2310 Process_Step: Process_Description: A linear contrast stretch was applied to the image to increase the dynamic range of the data and enhance the image for viewing. Original digital values of 0 (no data) surrounding the mosaic data were changed to 127. These enhancements were applied to prepare the image for printing. Source_Used_Citation_Abbreviation: gmx_q04 Process_Date: 1986 Source_Produced_Citation_Abbreviation: gmx_q04 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 Contact_Facsimile_Telephone: (508) 457-2310 Process_Step: Process_Description: The binary image files of the GLORIA mosaics were imported into a PCI database file allowing the images to be georeferenced. The image georeference report was saved for future reference. Source_Used_Citation_Abbreviation: gmx_q04.bin Process_Date: 20020624 Source_Produced_Citation_Abbreviation: gmx_q04.pix Source_Produced_Citation_Abbreviation: gmx_q04-georep.txt Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Valerie Paskevich Contact_Organization: U.S. Geological Survey Contact_Position: Information Specialist / GIS Coordinator, retired Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 Contact_Facsimile_Telephone: (508) 457-2310 Process_Step: Process_Description: The GLORIA image was exported from the PCI database file to a GeoTIFF image with an accompanying world file. Source_Used_Citation_Abbreviation: gmx_q04.pix Process_Date: 20020624 Source_Produced_Citation_Abbreviation: gmx_q04.tif Source_Produced_Citation_Abbreviation: gmx_q04.tfw Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Valerie Paskevich Contact_Organization: U.S. Geological Survey Contact_Position: Information Specialist / GIS Coordinator, retired Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 Contact_Facsimile_Telephone: (508) 457-2310 Process_Step: Process_Description: The image was modified to flood-fill the background 127 (grey) data value to 255 (white). After modification, the header portion of the image was updated to restore the georeferencing information. Source_Used_Citation_Abbreviation: gmx_q04.tif Source_Used_Citation_Abbreviation: gmx_q04.tfw Process_Date: 20020624 Source_Produced_Citation_Abbreviation: gmx_q04.tif Source_Produced_Citation_Abbreviation: gmx_q04.tfw Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Valerie Paskevich Contact_Organization: U.S. Geological Survey Contact_Position: Information Specialist / GIS Coordinator, retired Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 Contact_Facsimile_Telephone: (508) 457-2310 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Pixel Row_Count: 4381 Column_Count: 4180 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Albers Conical Equal Area Albers_Conical_Equal_Area: Standard_Parallel: 29.500000 Standard_Parallel: 45.500000 Longitude_of_Central_Meridian: -87.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 0.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: 50.000000 Ordinate_Resolution: 50.000000 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.400000 Denominator_of_Flattening_Ratio: 294.978698 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: There are no attributes associated with a GeoTIFF image. associated with a GeoTIFF image. 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. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 Contact_Facsimile_Telephone: (508) 457-2310 Resource_Description: Downloadable Data Distribution_Liability: Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. 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. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: TIFF Format_Specification: GeoTIFF Format_Information_Content: A zip archive containing the GeoTIFF image, world file, browse graphics and metadata files. File_Decompression_Technique: zip archive Transfer_Size: 8.05 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2010/1332/gloria_data/gomex/gmx_q04.zip Access_Instructions: Data are available for download on the World Wide Web (WWW). Offline_Option: Offline_Media: DVD-ROM Recording_Capacity: Recording_Density: 4.75 Recording_Density_Units: Gbytes Recording_Format: UDF Fees: None Technical_Prerequisites: The sidescan-sonar mosaic is available as a GeoTIFF image with accompanying world file and georeference report. To utilize this data, the user must have an image viewer, image processing or GIS software package capable of importing a GeoTIFF image. If the georeferencing information cannot be imported, the user may wish to obtain the georeference information contained in a separate file included in the zip file. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing and physical address Address: 345 Middlefield Road MS 999 City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Contact_Voice_Telephone: (650) 329-5078 Contact_Facsimile_Telephone: (650) 329-5190 Resource_Description: Downloadable Data Distribution_Liability: Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. 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. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: TIFF Format_Specification: GeoTIFF Format_Information_Content: A zip archive containing the GeoTIFF image, world file, browse graphics and metadata files. File_Decompression_Technique: zip archive Transfer_Size: 8.05 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2010/1332/gloria_data/gomex/gmx_q04.zip Access_Instructions: Data are available for download on the World Wide Web (WWW). Offline_Option: Offline_Media: DVD-ROM Recording_Capacity: Recording_Density: 4.75 Recording_Density_Units: Gbytes Recording_Format: UDF Fees: None Technical_Prerequisites: The sidescan-sonar mosaic is available as a GeoTIFF image with accompanying world file and georeference report. To utilize this data, the user must have an image viewer, image processing or GIS software package capable of importing a GeoTIFF image. If the georeferencing information cannot be imported, the user may wish to obtain the georeference information contained in a separate file included in the zip file. Metadata_Reference_Information: Metadata_Date: 20050616 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Valerie Paskevich Contact_Position: Information Specialist / GIS Coordinator, retired Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Country: USA Contact_Voice_Telephone: (508) 548-8700 Contact_Facsimile_Telephone: (508) 457-2310 Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: None Metadata_Use_Constraints: None Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile