Metadata: Identification_Information: Citation: Citation_Information: Originator: James V. Gardner Originator: Peter Dartnell Originator: Kenneth J. Sulak Publication_Date: 2002 Title: Multibeam mapping of the Pinnacles region, Gulf of Mexico Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 02-006 Publication_Information: Publisher: U.S. Geological Survey Publication_Place: Menlo Park, CA Online_Linkage: http://geopubs.wr.usgs.gov/open-file/of02-006/ Description: Abstract: This report provides multibeam bathymetry and acoustic backscatter data, along with images for parts of the sea floor. These data were obtained through a multibeam sonar survey of the Pinnacles region, northern Gulf of Mexico. Data are provided in ASCII and ArcInfo GRID formats. Purpose: Our objective was to map as large an area of the outer shelf deep reefs off Alabama-Mississippi as the project budget allowed using a state-of-the-art multibeam mapping system. The cruise used a Kongsberg Simrad EM1002, the latest generation of high-resolution multibeam mapping systems (HRMBS). The EM1002 produces both accurate georeferenced bathymetry and coregistered, calibrated, acoustic backscatter. These data should prove extremely useful in relating dominant species groups (which display highly specific biotope affinities) to the geomorphology (e.g., reef flattop, forereef crest, reef wall, reef base, circumreef talus zone, circum-reef, high-reflectivity sediment apron). The mapping is the first phase of a two-phase study of the Pinnacles area. The second year of this study (FY01) will concentrate on measuring the currents in and around the reefs as well as continued census of the fish populations. These data are intended for science researchers, students, policy makers, and the general public. The data can be used with geographic information systems (GIS) or other software to display bathymetry and backscatter data of the West Florida Shelf, Gulf of Mexico. Supplemental_Information: Information for USGS Coastal and Marine Geology related activities are online at Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20000602 Ending_Date: 20000728 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -88.537 East_Bounding_Coordinate: -87.367 North_Bounding_Coordinate: 29.629 South_Bounding_Coordinate: 29.154 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: Marine Geology Theme_Keyword: Multibeam Theme_Keyword: Bathymetry Theme_Keyword: Backscatter Theme_Keyword: Water Depth Theme_Keyword: Ocean Floor Topography Theme_Keyword: Deep-water Reefs Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Categories Theme_Keyword: geoscientificInformation Place: Place_Keyword_Thesaurus: None Place_Keyword: Pinnacles Region Place_Keyword: MS Place_Keyword: Gulf of Mexico Place_Keyword: USA Place: Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4, version 1.0 Place_Keyword: OC16 = Gulf of Mexico Access_Constraints: None Use_Constraints: Please recognize the U.S. Geological Survey (USGS) as the source of this information. USGS-authored or produced data and information are in the public domain. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: James V. Gardner Contact_Organization: United States Geological Survey (USGS) Coastal and Marine Geology (CMG) Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: USGS, MailStop 999, 345 Middlefield Road City: Menlo Park State_or_Province: CA Postal_Code: 94025-3561 Country: USA Contact_Voice_Telephone: (650) 329-5469 Contact_Facsimile_Telephone: (650) 329-5411 Contact_Electronic_Mail_Address: jvgardner@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: http://geopubs.wr.usgs.gov/open-file/of02-006/site/images/p-home.gif Browse_Graphic_File_Description: Reduced-size perspective image of the Pinnacles region, 325x216 pixels, 32-bit RGB true color, 33k bytes. Browse_Graphic_File_Type: GIF Browse_Graphic: Browse_Graphic_File_Name: http://geopubs.wr.usgs.gov/open-file/of02-006/site/images/loc.gif Browse_Graphic_File_Description: Index map showing the location of the Pinnacles region. 350x271 pixels, 32-bit RGB true color, 33k bytes. Browse_Graphic_File_Type: GIF Data_Quality_Information: Logical_Consistency_Report: Point features present. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Spatial resolution is 16 meters throughout the study area. A number of operational aspects of the data collection process affect accuracy; these are described in detail in http://geopubs.wr.usgs.gov/open-file/of00-350/of00-350.pdf Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: 0.05 percent of the water depth Lineage: Process_Step: Process_Description: The bathymetry and backscatter data were collected along a continuous swath perpendicular to the direction of the ship using a Kongsberg Simrad EM1002 multibeam sonar system. The data are cleaned of bad navigation and depth readings. The depth readings are gridded into a common grid. The gridded data are converted to an XYZ ASCII format file (Longitude, Latitude, Attribute). Process_Date: 20000728 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: James V. Gardner Contact_Organization: United States Geological Survey (USGS) Coastal and Marine Geology (CMG) Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: USGS, MailStop 999, 345 Middlefield Road City: Menlo Park State_or_Province: CA Postal_Code: 94025-3561 Country: USA Contact_Voice_Telephone: (650) 329-5469 Contact_Facsimile_Telephone: (650) 329-5411 Contact_Electronic_Mail_Address: jvgardner@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Point Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 16 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -87.00000 Latitude_of_Projection_Origin: 0.00000 False_Easting: 0.00 False_Northing: 0.00 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 16.0 Ordinate_Resolution: 16.0 Planar_Distance_Units: Meters Geodetic_Model: Horizontal_Datum_Name: WGS84 Ellipsoid_Name: WGS84 Semi-major_Axis: 6378137.00 meters Denominator_of_Flattening_Ratio: 0.003352811 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: BATHYG is an ArcInfo GRID with the following attributes: >Cell Size = 16.000 >Data Type: Floating Point >Number of Rows = 3234 >Number of Columns = 7067 BOUNDARY >Xmin = 351195.76 >Xmax = 464267.765 >Ymin = 3225996.10 >Ymax = 3277740.109 STATISTICS >Minimum Value = -360.688 >Maximum Value = -47.692 >Mean = -99.041 >Standard Deviation = 54.102 MOSG is an ArcInfo GRID with the following attributes: >Cell Size = 16.000 >Data Type: Floating Point >Number of Rows = 3234 >Number of Columns = 7073 BOUNDARY >Xmin = 351148.265 >Xmax = 464316.265 >Ymin = 3225995.300 >Ymax = 3277739.300 STATISTICS >Minimum Value 15.999 >Maximum Value = 253.973 >Mean = 172.346 >Standard Deviation = 8.689 Entity_and_Attribute_Detail_Citation: http://geopubs.wr.usgs.gov/open-file/of02-006/ Overview_Description: Entity_and_Attribute_Overview: Note that in the ASCII files, position is given by geographic (that is, latitude and longitide) coordinates, not in the dimensions of the projection used to create the grids. Sample of bathymetry XYZ ASCII file >Longitude, Latitude, Elevation in meters >-87.57406,29.06655,-48.497 >-87.57399,29.06655,-48.473 >-87.57391,29.06655,-48.418 >-87.57383,29.06655,-48.408 >-87.57375,29.06655,-48.411 >-87.57368,29.06655,-48.415 >-87.57430,29.06648,-48.738 >-87.57422,29.06648,-48.728 >-87.57414,29.06648,-48.678 Sample of Backscatter XYZ ASCII file > Longitude, Latitude, DN Value (reflectance of the sea floor) >-87.57421,29.06640,207.696 >-87.57413,29.06640,206.398 >-87.57405,29.06640,203.770 >-87.57398,29.06640,201.170 >-87.57390,29.06640,201.098 >-87.57382,29.06640,202.064 >-87.57374,29.06640,202.693 >-87.57367,29.06640,202.720 >-87.57444,29.06632,201.992 Entity_and_Attribute_Detail_Citation: http://geopubs.wr.usgs.gov/open-file/of02-006/ Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: United States Geological Survey (USGS) Information Services Contact_Address: Address_Type: mailing and physical address Address: Box 25286 City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: (888)ASK-USGS Resource_Description: USGS Open-File Report 02-006 Distribution_Liability: These data not intended for navigational purposes. Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, these data and information are provided with the understanding that they are not guaranteed to be usable, timely, accurate, or complete. Users are cautioned to consider carefully the provisional nature of these data and information before using them for decisions that concern personal or public safety or the conduct of business that involves substantial monetary or operational consequences. Conclusions drawn from, or actions undertaken on the basis of, such data and information are the sole responsibility of the user. Neither the U.S. Government nor any agency thereof, 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 data, software, information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. Trade, firm, or product names and other references to non-USGS products and services are provided for information only and do not constitute endorsement or warranty, express or implied, by the USGS, USDOI, or U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: CSV (ASCII) Format_Specification: The data are provided in comma-separated value (.csv) ASCII XYZ (longitude, latitude, value) format. Format_Information_Content: XYZ points with the Z coordinate indicating bathymetry (files named *bathy.zip) or backscatter (files named *mos.zip). File_Decompression_Technique: unzip Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://geopubs.wr.usgs.gov/open-file/of02-006/site/data/bathy.zip Network_Resource_Name: http://geopubs.wr.usgs.gov/open-file/of02-006/site/data/mos.zip Digital_Form: Digital_Transfer_Information: Format_Name: ArcInfo GRID Format_Version_Number: 8.0 Format_Information_Content: Bathymetry (in file named bathy.tgz) and backscatter (in file named mos.tgz) Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://geopubs.wr.usgs.gov/open-file/of02-006/site/data/bathy.tgz Network_Resource_Name: http://geopubs.wr.usgs.gov/open-file/of02-006/site/data/mos.tgz Fees: None Metadata_Reference_Information: Metadata_Date: 20011030 Metadata_Review_Date: 20020227 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Pete Dartnell Contact_Organization: United States Geological Survey (USGS) Coastal and Marine Geology (CMG) Contact_Position: Physical Scientist Contact_Address: Address_Type: mailing and physical address Address: USGS, MailStop 999, 345 Middlefield Road City: Menlo Park State_or_Province: CA Postal_Code: 94025-3561 Country: USA Contact_Voice_Telephone: (650) 329-5460 Contact_Facsimile_Telephone: (650) 329-5411 Contact_Electronic_Mail_Address: pdartnell@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: universal time