Area A (northeastern portion) Sidescan-Sonar Mosaic, Pulley Ridge: UTM, Zone 17 Projection

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: David C. Twichell
Originator: VeeAnn A. Cross
Publication_Date: 2005
Title:
Area A (northeastern portion) Sidescan-Sonar Mosaic, Pulley Ridge: UTM, Zone 17 Projection
Geospatial_Data_Presentation_Form: remote-sensing image
Online_Linkage:
<http://pubs.usgs.gov/of/2005/1089/data/sidescan/utm17/area_a.zip>
Larger_Work_Citation:
Citation_Information:
Originator: VeeAnn A. Cross
Originator: David C. Twichell
Originator: Robert B. Halley
Originator: Kate T. Ciembronowicz
Originator: Bret D. Jarrett
Originator: Erika S. Hammar-Klose
Originator: Al C. Hine
Originator: Stan D. Locker
Originator: Dave F. Naar
Publication_Date: 2005
Title:
GIS Compilation of Data Collected from the Pulley Ridge Deep Coral Reef Region
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2005-1089
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/2005/1089>
Description:
Abstract:
Pulley Ridge is a series of drowned barrier islands that extends almost 200 km in 60-100 m water depths. This drowned ridge is located on the Florida Platform in the southeastern Gulf of Mexico about 250 km west of Cape Sable, Florida. This barrier island chain formed during the initial stage of the Holocene marine transgression. These islands were then submerged and left abandoned near the outer edge of the Florida Platform. The southern portion of Pulley Ridge hosts zooxanthellate scleractinian corals, green, red and brown macro algae, and a mix of deep and typically shallow-water tropical fishes. This reef community is in unusually deep water, and its extent and the controls on its distribution were unknown. To address these questions scientists from the U.S. Geological Survey Coastal and Marine Geology Program in cooperation with scientists from the University of South Florida Department of Marine Sciences have completed a detailed mapping of the southernmost 35 km of Pulley Ridge. The area was mapped using multibeam bathymetry, sidescan-sonar imagery, and high-resolution seismic-reflection profiling to define the geologic framework on which the reef is established. Submersible dives, remotely operated vehicle (ROV) transects, and transects of bottom photographs and video were collected to identify the corals and to map their distribution. This extensive suite of data has been compiled and preliminary analysis of the data suggests that the reefs are not tied to the ridge system, but instead are more broadly distributed. Whether reef distribution is controlled by oceanographic conditions or by subtle differences in the substrate that overlies the barrier island system is unclear, and are topics of continued research.
Purpose:
This sidescan-sonar mosaic is used to map the morphology of the seafloor.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20010907
Ending_Date: 20010908
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -83.682614
East_Bounding_Coordinate: -83.597487
North_Bounding_Coordinate: 25.001414
South_Bounding_Coordinate: 24.878584
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: CMGP
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: coral
Theme_Keyword: coral reef
Theme_Keyword: mosaic
Theme_Keyword: OF 2005-1089
Theme_Keyword: Open-File Report
Theme_Keyword: reef
Theme_Keyword: sidescan
Theme_Keyword: sidescan sonar
Theme_Keyword: TIFF
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Woods Hole Science Center
Theme_Keyword: DF-1000
Theme_Keyword: field activity serial number 01010
Theme_Keyword: field activity identifier S-1-01-GM
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: Florida
Place_Keyword: Florida Shelf
Place_Keyword: Gulf of Mexico
Place_Keyword: North America
Place_Keyword: Pulley Ridge
Place_Keyword: United States
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.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: David C. Twichell
Contact_Organization: U.S. Geological Survey
Contact_Position: Oceanographer
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
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
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: W.W. Danforth
Originator: T.F. O'Brien
Originator: W.C. Schwab
Publication_Date: 1991
Title:
USGS image processing system: near real-time mosaicking of high-resolution sidescan-sonar data
Series_Information:
Issue_Identification: Jan. 1991
Publication_Information:
Publisher: Sea Technology
Cross_Reference:
Citation_Information:
Originator: E.S. Hammar-Klose
Originator: D.C. Twichell
Originator: C.R. Worley
Publication_Date: 2003
Title:
Archive of sidescan-sonar data and DGPS navigation data, collected during USGS cruise SUNC01010, Pulley Ridge, Gulf of Mexico, 05 September - 12 September 2001
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 02-155
Publication_Information:
Publication_Place: Woods Hole Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey
Cross_Reference:
Citation_Information:
Originator: V.F. Paskevich
Publication_Date: 1992
Title:
Digital mapping of sidescan sonar data with the Woods Hole Image Processing System software
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 92-536
Publication_Information:
Publisher: U.S. Geological Survey
Cross_Reference:
Citation_Information:
Originator: V.F. Paskevich
Publication_Date: 1996
Title:
MAPIT: An improved method for mapping digital sidescan sonar data using the Woods Hole Image Processing System (WHIPS) Software
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 96-281
Publication_Information:
Publisher: U.S. Geological Survey
Data_Quality_Information:
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The ship was navigated with Differential GPS which has an assumed accuracy of better than 10 meters. A transponder was used to range to fish, which introduces additional positional accuracy of the sidescan imagery.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: 30m
Lineage:
Process_Step:
Process_Description:
Sidescan-sonar imagery was collected using an EG&G DF1000 sidescan sonar system and logged to a Triton Elics QMIPS data logging computer.
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Erika Hammar-Klose
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2344
Contact_Facsimile_Telephone: 5084572310
Contact_Electronic_Mail_Address: ehammark@usgs.gov
Process_Step:
Process_Description:
The digital sidescan data were then processed and mapped to provide proper geographic locations of features identified in the imagery. The processing steps included subsampling the raw sidescan data using a median filtering routine to suppress speckle noise and reduce file size, and correct for slant-range distortion, signal attenuation, and dropped sonar lines using XSonar (Danforth et al., 1991). After these processing steps, the imagery was mapped into its proper geographic location using techniques summarized by Paskevich (1996). Individual sidescan swaths were mapped with each pixel geographically positioned at a resolution of 1 m/pixel.
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Erika Hammar-Klose
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2344
Contact_Facsimile_Telephone: 5084572310
Contact_Electronic_Mail_Address: ehammark@usgs.gov
Process_Step:
Process_Description:
Non-overlapping swaths were then brought into the remote sensing software package PCI. The techniques for generating the composite digital sidescan mosaic are summarized by Paskevich (1992).
Process_Step:
Process_Description:
Once the mosaics were completed, noise and areas of no data were trimmed from the fringes of the completed mosaic.
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Process_Step:
Process_Description:
A linear stretch was applied in PCI to the sidescan image. This stretch was from 0-255 with resulting values between 0 and 254. This was done so that the white background (255) could be made transparent in the GIS.
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Row_Count: 13453
Column_Count: 8342
Vertical_Count: 1
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 17
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -81.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 1.000000
Ordinate_Resolution: 1.000000
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:
The pixel value represents the DN return value of the sidescan-sonar system. A high value (i.e. 254) indicates a highly reflective sea floor surface, while a low value (i.e. 0) indicates low reflectance. All of the sidescan-sonar imagery was collected at a 600 m swath.
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: David C. Twichell
Contact_Organization: U.S. Geological Survey
Contact_Position: Oceanographer
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
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
Resource_Description: Downloadable Data
Distribution_Liability:
These data were prepared by an agency of the United States Government. Neither the United States government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States government or any agency thereof. Any views and opinions of authors expressed herein do not necessarily state or reflect those of the United States government or any agency thereof. Although all data published in this report have been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials and/or the functioning of the software. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of this data, software, or related materials.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Transfer_Size: 107.129
Metadata_Reference_Information:
Metadata_Date: 20050513
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: VeeAnn A. Cross
Contact_Organization: U.S. Geological Survey
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: (508) 548-8700 x2251
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: vatnipp@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_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
Generated by mp version 2.8.6 on Fri May 13 13:50:48 2005