Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 2011 Title: GAK_250M_LCC_WGS84.TIF - Gulf of Alaska U.S. EEZ GLORIA sidescan-sonar composite mosaic (LCC, 250 m, WGS84) 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/gulf_of_alaska/composite/gak_250m_lcc_wgs84.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: The Gulf of Alaska U.S. EEZ GLORIA digital sidescan-sonar mosaic covers about 806,000 square kilometers (sq km) of sea-floor. The mosaic shows the sea-floor morphology from Uminak Pass to Dixon Entrance, from the shelf break seaward to about 400 km. An additional 70-km-wide swath was imaged along the British Columbia margin to follow the trace of the Queen Charlotte Fault south of the Dixon Entrance. Major features visible on the mosaic include continental-margin deformation structures and submarine-channel systems. 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 sea-floor. A total of 30 digital mosaics with a 50-meter pixel resolution were assembled to complete the Gulf of Alaska overview mosaic. Purpose: This remote sensing image of the sea-floor is a reduced-resolution (250-meter) composite mosaic of the 30 mosaics created from the Gulf of Alaska U.S. EEZ GLORIA sidescan-sonar data. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19860624, 19880706, 19880805, 19890516, 19890614 Ending_Date: 19860703, 19880802, 19880831, 19890612, 19890710 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -166.307494 East_Bounding_Coordinate: -125.485934 North_Bounding_Coordinate: 60.006665 South_Bounding_Coordinate: 50.013922 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: Western Coastal and Marine Geology Theme_Keyword: WCMG Theme_Keyword: Geological LOng-Range Inclined Asdic Theme_Keyword: GLORIA Theme_Keyword: GeoTIFF image Theme_Keyword: grey scale image Theme_Keyword: sidescan-sonar mosaic Theme_Keyword: composite mosaic Theme_Keyword: backscatter Theme_Keyword: acoustic reflectivity Theme_Keyword: marine geology Theme_Keyword: 250-meter Theme_Keyword: Lambert Conformal Conic Theme_Keyword: Exclusive Economic Zone Theme_Keyword: EEZ Theme_Keyword: Infobank identifier F-8-88-AA Theme_Keyword: Infobank identifier F-1-86-GA Theme_Keyword: Infobank identifier F-6-89-GA Theme_Keyword: Infobank identifier F-7-89-EG Theme_Keyword: Infobank identifier F-9-88-WG 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: Alaska Place_Keyword: Gulf of Alaska Place_Keyword: Aleutian Trench Place_Keyword: Aleutian Abyssal Plain Place_Keyword: Surveyor Channel Place_Keyword: Chirikof Channel Place_Keyword: Kodiak-Bowie seamount chain Place_Keyword: Alaskan Abyssal Plain Place_Keyword: Yakutat Margin Place_Keyword: British Columbia Margin Place_Keyword: Queen Charlotte Fault Place: Place_Keyword_Thesaurus: NASA/Global Change Master Directory (GCMD) Place Keywords Place_Keyword: Ocean > Pacific Ocean Place_Keyword: Ocean > Pacific Ocean > North Pacific Ocean Place_Keyword: Ocean > Pacific Ocean > North Pacific Ocean > Gulf Of Alaska 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: 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 Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2010/1332/gloria_data/gulf_of_alaska/composite/browse/gak_250m_lcc_wgs84-thumb.gif Browse_Graphic_File_Description: Thumbnail image showing an overview of the Gulf of Alaska U.S. EEZ GLORIA composite mosaic. Browse_Graphic_File_Type: GIF Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2010/1332/gloria_data/gulf_of_alaska/composite/browse/gak_250m_lcc_wgs84.gif Browse_Graphic_File_Description: Browse image showing an overview of the Gulf of Alaska U.S. EEZ GLORIA composite mosaic. Browse_Graphic_File_Type: GIF Data_Set_Credit: Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. 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: J.V. Gardner (editor) Originator: M.E. Field (editor) Originator: D.C. Twichell (editor) Publication_Date: 1996 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 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: disc Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19860624, 19880706, 19880805, 19890516, 19890614 Ending_Date: 19860703, 19880802, 19880831, 19890612, 19890710 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: Gulf of Alaska U.S. EEZ GLORIA mosaics 31-60 Source_Contribution: The 30 completed 50-meter mosaics were combined to create an Lambert Conic Conformal (LCC) Conic projection, 250-meter composite overview. Process_Step: Process_Description: An empty PCI database for the full extent of the Gulf of Alaska U.S. EEZ GLORIA was defined. The imagery database was defined with an Lambert Conic Conformal (LCC) Conic projection at a resolution of 250-meters. Standard parallels of 50 and 59 and a central longitude of -144 and a central latitude of 55 were selected with a WGS84 spheroid. Process_Date: 20070827 Source_Produced_Citation_Abbreviation: gak_250m_lcc_wgs84.pix Process_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 Process_Step: Process_Description: Using the PCI Geomatics tool GCPworks, the 30 individual 50-meter mosaics were combined to create a composite overview of the Gulf of Alaska U.S. EEZ GLORIA data at a resolution of 250-meters. The individual full-resolution GLORIA mosaics with the white flood-filled background were mosaiced together to create a single reduced-resolution composite mosaic for the Gulf of Alaska. Individual mosaics were "dropped" into the composite database. No rubber sheeting or geometric corrections were applied to the mosaics. However, some mosaics were radiometrically enhanced to reduce the effect of the individual square boundaries and produce a more uniform overview image. The individual 30 mosaics were combined using a bi-linear resampling mode to reduce noise and blockiness. Source_Used_Citation_Abbreviation: gak_q31.tif Source_Used_Citation_Abbreviation: gak_q32.tif Source_Used_Citation_Abbreviation: gak_q33.tif Source_Used_Citation_Abbreviation: gak_q34.tif Source_Used_Citation_Abbreviation: gak_q35.tif Source_Used_Citation_Abbreviation: gak_q36.tif Source_Used_Citation_Abbreviation: gak_q37.tif Source_Used_Citation_Abbreviation: gak_q38.tif Source_Used_Citation_Abbreviation: gak_q39.tif Source_Used_Citation_Abbreviation: gak_q40.tif Source_Used_Citation_Abbreviation: gak_q41.tif Source_Used_Citation_Abbreviation: gak_q42.tif Source_Used_Citation_Abbreviation: gak_q43.tif Source_Used_Citation_Abbreviation: gak_q44.tif Source_Used_Citation_Abbreviation: gak_q45.tif Source_Used_Citation_Abbreviation: gak_q46.tif Source_Used_Citation_Abbreviation: gak_q47.tif Source_Used_Citation_Abbreviation: gak_q48.tif Source_Used_Citation_Abbreviation: gak_q49.tif Source_Used_Citation_Abbreviation: gak_q50.tif Source_Used_Citation_Abbreviation: gak_q51.tif Source_Used_Citation_Abbreviation: gak_q52.tif Source_Used_Citation_Abbreviation: gak_q53.tif Source_Used_Citation_Abbreviation: gak_q54.tif Source_Used_Citation_Abbreviation: gak_q55.tif Source_Used_Citation_Abbreviation: gak_q56.tif Source_Used_Citation_Abbreviation: gak_q57.tif Source_Used_Citation_Abbreviation: gak_q58.tif Source_Used_Citation_Abbreviation: gak_q59.tif Source_Used_Citation_Abbreviation: gak_q60.tif Source_Used_Citation_Abbreviation: gak_250m_lcc_wgs84.pix Process_Date: 20070827 Source_Produced_Citation_Abbreviation: gak_250m_lcc_wgs84.pix Process_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 Process_Step: Process_Description: The completed reduced 250-meter mosaic was exported from the PCI database as a GeoTIFF image with associated world file. Source_Used_Citation_Abbreviation: gak_250m_lcc_wgs84.pix Process_Date: 20070827 Source_Produced_Citation_Abbreviation: gak_250m_lcc_wgs84.tif Source_Produced_Citation_Abbreviation: gak_250m_lcc_wgs84.tfw Process_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 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Pixel Row_Count: 3770 Column_Count: 9397 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Lambert Conformal Conic Lambert_Conformal_Conic: Standard_Parallel: 50.000000 Standard_Parallel: 59.000000 Longitude_of_Central_Meridian: -144.000000 Latitude_of_Projection_Origin: 55.000000 False_Easting: 0.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: 250.000000 Ordinate_Resolution: 250.000000 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: D_WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257224 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: There are no attributes associated with a GeoTIFF image. 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 NOT been radiometrically enhanced. 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: 9.8 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2010/1332/gloria_data/gulf_of_alaska/composite/gak_250m_lcc_wgs84.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: 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: 9.8 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2010/1332/gloria_data/gulf_of_alaska/composite/gak_250m_lcc_wgs84.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 composite 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 view the georeference information contained in a separate file included in the zip file. Metadata_Reference_Information: Metadata_Date: 20110331 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