Identification_Information: Citation: Citation_Information: Originator: David Twichell Originator: Valerie Paskevich Publication_Date: 2001 Title: SEAMARC_ENGEOG.TIF - Enhanced 25 m SeaMARC 1A sidescan sonar mosaic from the Mississippi Fan - geographic, WGS 84 Edition: 1.0 Geospatial_Data_Presentation_Form: remote-sensing image Series_Information: Series_Name: Open-File Report Issue_Identification: 2005-1071 Publication_Information: Publication_Place: Woods Hole Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: http://pubs.usgs.gov/of/2005/1071/data/sidescan/imagery/enhanced/geog/seamarc_engeog.zip Larger_Work_Citation: Citation_Information: Originator: Twichell D.C. Originator: Cross V.A. Originator: Paskevich, V.F. Originator: Hutchinson, D.R. Originator: Winters, W.J. Originator: Hart, P.E. Publication_Date: 2005 Title: GIS of selected geophysical and core data in the northern Gulf of Mexico continental slope collected by the U.S. Geological Survey Edition: 1.0 Series_Information: Series_Name: Open-File Report Issue_Identification: 2005-1071 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 DVD-ROM Online_Linkage: http://pubs.usgs.gov/of/2005/1071 Description: Abstract: Since 1982, the U.S. Geological Survey (USGS) has collected a large amount of surficial and shallow subsurface geologic information in the deep parts of the Gulf of Mexico. These data include digital sidescan sonar imagery, digital seismic-reflection data, and descriptions and analyses of piston and gravity cores. The data were collected during several different projects that addressed surficial and shallow subsurface geologic processes. Some of these data sets have already been published, but the growing interest in the occurrence and distribution of gas hydrates in the Gulf of Mexico warrants integrating these existing data and associated interpretations into a GIS to provide regional background information for ongoing and future gas hydrate research. Purpose: This GIS data layer is a 25 m version of the completed SeaMARC 1A sidescan sonar image mosaic, which has been enhanced and projected to geographic using the WGS 84 datum. The SeaMARC 1A imagery was collected in 1990 from the eastern part of the Mississippi Fan and covers an area of 3,047 km2. An interpretation of these data is presented by Twichell et al. (1992) and Twichell et al. (1995). Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19900325 Ending_Date: 19900408 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -86.602741 East_Bounding_Coordinate: -84.986548 North_Bounding_Coordinate: 26.900414 South_Bounding_Coordinate: 26.100744 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: Gulf of Mexico database Theme_Keyword: U.S. Exclusive Economic Zone Theme_Keyword: EEZ Theme_Keyword: sidescan sonar Theme_Keyword: sidescan sonar mosaic Theme_Keyword: composite mosaic Theme_Keyword: TIFF Theme_Keyword: TIF Theme_Keyword: GEOTIFF Theme_Keyword: GeoTIFF Theme_Keyword: SeaMARC 1A Theme_Keyword: seamarc Theme_Keyword: Information Archives Field Activity 99002 Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans and estuaries Theme_Keyword: imageryBaseMapsEarthCover Theme_Keyword: geoscientificInformation Place: Place_Keyword_Thesaurus: General Place_Keyword: Gulf of Mexico Place_Keyword: Mississippi Fan Place_Keyword: North America Place_Keyword: United States 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. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: David Twichell Contact_Organization: U.S. Geological Survey Contact_Position: Oceanographer 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 x2266 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: dtwichell@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2005/1071/data/sidescan/imagery/enhanced/geog/seamarc_engeog-thumb.gif Browse_Graphic_File_Description: Thumbnail image of the SeaMARC1A sidescan sonar mosaic from the Mississippi Fan. Browse_Graphic_File_Type: GIF Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/of/2005/1071/data/sidescan/imagery/enhanced/geog/seamarc_engeog.gif Browse_Graphic_File_Description: Overview image of the SeaMARC1A sidescan sonar mosaic from the Mississippi Fan. Browse_Graphic_File_Type: GIF 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: V. Paskevich Originator: D. Twichell Originator: W. Schwab Publication_Date: 2001 Title: SeaMARC 1A sidescan sonar mosaic, cores and depositional interpretation of the Mississippi Fan: ArcView GIS data release Edition: 1.0 Series_Information: Series_Name: Open-File Report Issue_Identification: 00-352 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/of00-352/ Cross_Reference: Citation_Information: Originator: V. Paskevich Publication_Date: 1992 Title: Digital mapping of side-scan sonar data with the Woods Hole Image Processing System software Edition: 1.0 Series_Information: Series_Name: Open-File Report Issue_Identification: 92-536 Publication_Information: Publication_Place: Woods Hole Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Cross_Reference: Citation_Information: Originator: Twichell, D.C. Originator: Schwab, W.C. Originator: Nelson, C.H. Originator: Kenyon, N.H. Originator: Lee, H.J. Publication_Date: 1992 Title: Depositional processes on the distal Mississippi Fan Edition: 1.0 Series_Information: Series_Name: v. 20, p. 689-692 Issue_Identification: Geology Publication_Information: Publication_Place: Boulder, CO Publisher: Geological Society of America Cross_Reference: Citation_Information: Originator: Twichell, D.C. Originator: Schwab, W.C. Originator: Kenyon, N.H. Publication_Date: 1995 Title: Geometry of sandy deposits at the distal edge of the Mississippi Fan, Gulf of Mexico Series_Information: Series_Name: Atlas of Deep Water Environments Architectural Style in Turbidite Systems Issue_Identification: p. 282-286 Publication_Information: Publication_Place: London Publisher: Chapman and Hall Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: There are no attributes associated with the image. Logical_Consistency_Report: All these data were collected with a SeaMARC 1A sidescan sonar system operated by Williamson and Associates, Seattle, WA. All the data were acquired at a 5 km total swath width. Completeness_Report: All imagery that was acquired has been included in this mosaic. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The ship was navigated using satellite navigation, and the location of the sidescan vehicle was computed using the ship location, ship heading, length of tow cable, and depth of the sidescan vehicle. Lineage: Source_Information: Source_Citation: Citation_Information: Series_Information: Publication_Information: Type_of_Source_Media: magnetic tape Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19900325 Ending_Date: 19900408 Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: QMIPS data tapes Source_Contribution: SeaMARC 1A sidescan sonar data were logged using a QMIPS data acquisition system and recorded to 8 mm digital tape for post-cruise processing. Process_Step: Process_Description: The individual SeaMARC 1A sidescan swaths were transferred from tape to disk. The files were subsequently converted from the QMIPS format to a WHIPS format for processing. The WHIPS format and processing procedures are described in Paskevich (1992). Source_Used_Citation_Abbreviation: QMIPS data tapes Source_Produced_Citation_Abbreviation: WHIPS data files Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: David Twichell Contact_Organization: U.S. Geological Survey Contact_Position: Oceanographer 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 x2266 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: dtwichell@usgs.gov Process_Step: Process_Description: The individual sidescan files were processed using the Woods Hole Image Processing Software (WHIPS, Paskevich, 1992). The individual strips of sidescan data were processes to apply geometric (i.e. slant-to-ground range corrections) and radiometric corrections (i.e. beam correction shading and striped noise removal). Source_Used_Citation_Abbreviation: WHIPS data files Source_Produced_Citation_Abbreviation: WHIPS data files Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: David Twichell Contact_Organization: U.S. Geological Survey Contact_Position: Oceanographer 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 x2266 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: dtwichell@usgs.gov Process_Step: Process_Description: The SeaMARC 1A files that comprised the eastern half of the survey were transferred to the Woods Hole Science Center's MicroVAX-II computer system. This portion of the survey consisted of mostly straight line segments and were to be digitally mosaicked on this system. (The western portion was done a few months later with developing software). The MicroVAX-II computer system contained the Mini-Image Processing System (MIPS) software that was needed to map and digitally mosaic the data. To begin processing, the WHIPS data files were all converted to MIPS format. Source_Used_Citation_Abbreviation: WHIPS data files Source_Produced_Citation_Abbreviation: MIPS data files Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: David Twichell Contact_Organization: U.S. Geological Survey Contact_Position: Oceanographer 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 x2266 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: dtwichell@usgs.gov Process_Step: Process_Description: The MIPS data files were spatially mapped using program GEOM. The files were projected and mapped with a Mercator projection and a Clarke 1866 spheroid. Source_Used_Citation_Abbreviation: WHIPS data files Source_Produced_Citation_Abbreviation: MIPS data files Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: David Twichell Contact_Organization: U.S. Geological Survey Contact_Position: Oceanographer 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 x2266 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: dtwichell@usgs.gov Process_Step: Process_Description: As the individual swaths were mapped, they were geo-referenced to the base image, stenciled and mosaicked to the base. (The base was one swath that had been mapped and was selected as the master which everything would be registered with). Control points were selected interactively to match features on the adjacent lines and a rubber sheeting procedure was applied to the mapped swaths to better align the images. Once registered, a stencil line was interactively drawn around the area of the line to be added. This stencil area was critical as it not only eliminated the unwanted area that was overlapping the adjacent lines, but defined the area to be kept. Finally, the registered, transformed and stenciled image was added to the base. These steps were repeated for each swath until the eastern mosaic was completed. Source_Used_Citation_Abbreviation: MIPS data files Source_Produced_Citation_Abbreviation: MIPS data files Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: David Twichell Contact_Organization: U.S. Geological Survey Contact_Position: Oceanographer Contact_Voice_Telephone: (508) 548-8700 x2266 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: dtwichell@usgs.gov Process_Step: Process_Description: The SeaMARC1A files that comprised the western half of the survey were mapped using the WHIPS software. This area of the survey consisted of several survey line segments. This software could handle curved line segments./ The files were projected and mapped with a Mercator projection and a Clarke 1866 spheroid to match the eastern portion of the mosaic. Source_Used_Citation_Abbreviation: MIPS data files Source_Produced_Citation_Abbreviation: MIPS data files Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: David Twichell Contact_Organization: U.S. Geological Survey Contact_Position: Oceanographer 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 x2266 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: dtwichell@usgs.gov Process_Step: Process_Description: The WHIPS mapped swaths were transferred to the Center's MicroVAX-II computer system for stenciling and mosaicking with the MIPS software. Once transferred to the MicroVAX, the files were converted to the MIS format for processing. Source_Used_Citation_Abbreviation: WHIPS data files Source_Produced_Citation_Abbreviation: MIPS data files Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: David Twichell Contact_Organization: U.S. Geological Survey Contact_Position: Oceanographer Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: (508) 548-8700 x2266 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: dtwichell@usgs.gov Process_Step: Process_Description: The converted WHIPS mapped swaths were stenciled and mosaicked with the MIPS software. This procedure is similar to the one outlined for the eastern portion of the survey. Control points were selected interactively to match features on the adjacent lines and a rubber sheeting procedure was applied to the mapped swaths to better align the images. Once registered, a stencil line was interactively drawn around the area of the line to be added. This stencil area was critical as it not only eliminated the unwanted area that was overlapping the adjacent lines but defined the area to be kept. Finally the registered, transformed and stenciled image was added to the base. These steps were repeated for each swath until the western mosaic was completed. Source_Used_Citation_Abbreviation: MIPS data files Source_Produced_Citation_Abbreviation: west.pic Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: David Twichell Contact_Organization: U.S. Geological Survey Contact_Position: Oceanographer 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 x2266 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: dtwichell@usgs.gov Process_Step: Process_Description: The two completed mosaics, east.pic and west.pic, were combined to create one overall view of the study area. Source_Used_Citation_Abbreviation: east.pic Source_Used_Citation_Abbreviation: west.pic Source_Produced_Citation_Abbreviation: compos.pic Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: David Twichell Contact_Organization: U.S. Geological Survey Contact_Position: Oceanographer 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 x2266 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: dtwichell@usgs.gov Process_Step: Process_Description: The MIPS created mosaic, compos.pic, was transferred to a UNIX computer system. The image was imported into a PCI Remote Sensing database file and georeferenced as Mercator. Source_Used_Citation_Abbreviation: compos.pic Source_Produced_Citation_Abbreviation: msfan.pix Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: David Twichell Contact_Organization: U.S. Geological Survey Contact_Position: Oceanographer 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 x2266 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: dtwichell@usgs.gov Process_Step: Process_Description: The mosaic, compos.pix, was reprojected from Mercator to UTM using the PCI Remote Sensing software. Source_Used_Citation_Abbreviation: msfan.pix Process_Date: 19990218 Source_Produced_Citation_Abbreviation: utme00.pix Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Valerie Paskevich Contact_Organization: U.S. Geological Survey Contact_Position: Information Specialist/GIS Coordinator 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 x2281 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: vpaskevich@usgs.gov Process_Step: Process_Description: Using the PCI Remote Sensing software, a linear contrast stretch was applied to the SeaMARC 1A sidescan sonar mosaic stored in channel 1. This was done to improve the image's viewing by expanding the data's dynamic range. Source_Used_Citation_Abbreviation: utm1.pix channel 1 Process_Date: 19990319 Source_Produced_Citation_Abbreviation: utm1.pix channel 3 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Valerie Paskevich Contact_Organization: U.S. Geological Survey Contact_Position: Information Specialist/GIS Coordinator 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 x2281 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: vpaskevich@usgs.gov Process_Step: Process_Description: The completed, enhanced, 25 m SeaMARC 1A sidescan sonar mosaic was exported from the PCI 'pix' database as a GEOTIFF image with an associated "world" file. Source_Used_Citation_Abbreviation: utme00.pix channel 3 Process_Date: 19990803 Source_Produced_Citation_Abbreviation: enhanced/seamarc.tif Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Valerie Paskevich Contact_Organization: U.S. Geological Survey Contact_Position: Information Specialist/GIS Coordinator Contact_Voice_Telephone: (508) 548-8700 x2281 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: vpaskevich@usgs.gov Process_Step: Process_Description: The SeaMARC 1A GeoTIFF image was reprojected from a UTM projection using the NAD 27 datum to a geographic projection using the WGS 84 datum. The reprojection was done using Geographic Transformer (v. 5.1) produced by Blue Marble. The affine transform mode was used, the pixel size was 25 m, and the central latitude was 26.25N. Source_Used_Citation_Abbreviation: enhanced/seamarc.tif Process_Date: 20040916 Source_Produced_Citation_Abbreviation: seamarc_engeog.tif Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: David Twichell Contact_Organization: U.S. Geological Survey Contact_Position: Oceanographer 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 x2266 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: dtwichell@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Raster Raster_Object_Information: Raster_Object_Type: Pixel Row_Count: 3544 Column_Count: 6410 Vertical_Count: 1 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Geographic_Coordinate_Units: Decimal degrees Planar: Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: 0.000252 Ordinate_Resolution: 0.000226 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: Detailed_Description: Entity_Type: Entity_Type_Label: Band_1 Attribute: Attribute_Label: ObjectID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Value Attribute: Attribute_Label: Red Attribute: Attribute_Label: Green Attribute: Attribute_Label: Blue Overview_Description: Entity_and_Attribute_Overview: There are no attributes associated with a GeoTIFF image. Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: Valerie Paskevich Contact_Organization: U.S. Geological Survey Contact_Position: Information Specialist/GIS Coordinator 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 x2281 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: vpaskevich@usgs.gov Resource_Description: Downloadable Data Distribution_Liability: 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. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: TIFF Format_Specification: GeoTIFF Format_Information_Content: A GeoTIFF image and associated world file. File_Decompression_Technique: zip Transfer_Size: 4.903 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2005/1071/data/sidescan/imagery/enhanced/geog/seamarc_engeog.zip Access_Instructions: Data may be retrieved via any WWW browser. Offline_Option: Offline_Media: DVD-ROM Recording_Capacity: Recording_Density: 4.75 Recording_Density_Units: Gbytes Recording_Format: UDF Fees: None Technical_Prerequisites: 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. Metadata_Reference_Information: Metadata_Date: 20051213 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Valerie Paskevich Contact_Position: Information Specialist / GIS Coordinator 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 x2281 Contact_Facsimile_Telephone: (508) 457-2310 Contact_Electronic_Mail_Address: vpaskevich@usgs.gov 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