Composite Sidescan-Sonar Mosaic, Pulley Ridge: UTM, Zone 17 Projection

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: David C. Twichell

Originator: VeeAnn A. Cross

Publication_Date: 2005

Title:

Composite 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/composite_utm.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: 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

Theme_Keyword: reef

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

Process_Step:

Process_Description:

The individual mosaics from areas a, b, and c were combined into a composite mosaic using BlueMarble's Geographic Transformer version 5.1.

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Pixel

Row_Count: 38762

Column_Count: 18968

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:

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:

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: 204.685

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