MOSAIC_07007_DD - Composite sidescan-sonar mosaic collected by the U.S. Geological Survey offshore of the Chandeleur Islands, LA, 2007 (Geographic GeoTIFF)

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 2009
Title:
MOSAIC_07007_DD - Composite sidescan-sonar mosaic collected by the U.S. Geological Survey offshore of the Chandeleur Islands, LA, 2007 (Geographic GeoTIFF)
Edition: 1.0
Geospatial_Data_Presentation_Form: remote-sensing image
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2008-1195
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/2008/1195/GIS_catalog/Sidescan/mosaic_07007_dd.zip>
Larger_Work_Citation:
Citation_Information:
Originator: Wayne E. Baldwin
Originator: Elizabeth A. Pendleton
Originator: David C. Twichell
Publication_Date: 2009
Title:
Geophysical Data from offshore of the Chandeleur Islands, Eastern Mississippi Delta
Edition: 1.0
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2008-1195
Publication_Information:
Publication_Place: Woods Hole Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey
Online_Linkage: <http://pubs.usgs.gov/of/2008/1195/>
Description:
Abstract:
In 2006 and 2007, the U.S. Geological Survey, in partnership with Louisiana Department of Natural Resources and the University of New Orleans, conducted geologic mapping to characterize the sea floor and shallow subsurface stratigraphy offshore of the Chandeleur Islands in Eastern Louisiana. The mapping was carried out during two cruises on the R/V Acadiana. Data were acquired with the following equipment: an SEA Ltd SwathPlus interferometric sonar (234 kHz), Klein 3000 dual frequency sidescan sonar, and an Edgetech 512i chirp subbottom profiling system. The long-term goal of this mapping effort is to produce high-quality geologic maps and geophysical interpretations that can be utilized to investigate the impact of Hurricane Katrina in 2005 and to identify sand resources within the region.
Purpose:
This GeoTIFF (Tagged Image File Format) contains approximately 255 square-km of sidescan sonar data that were collected in 2007. These data are used to define the sea-floor morphology offshore of the Chandeleur Islands in Eastern Louisiana.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20070610
Ending_Date: 20070622
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -89.305390
East_Bounding_Coordinate: -88.818850
North_Bounding_Coordinate: 29.728412
South_Bounding_Coordinate: 29.368439
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Woods Hole Science Center
Theme_Keyword: WHSC
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: sidescan-sonar
Theme_Keyword: sidescan
Theme_Keyword: side scan sonar
Theme_Keyword: backscatter
Theme_Keyword: GeoTIFF image
Theme_Keyword: grey scale
Theme_Keyword: composite image
Theme_Keyword: WHSC field activity report number 07007
Theme_Keyword: mosaic
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: oceans and coastal
Theme_Keyword: oceans and estuaries
Theme_Keyword: geoscientificInformation
Theme_Keyword: imageryBaseMapsEarthCover
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: Louisiana
Place_Keyword: Chandeleur Islands
Place_Keyword: Breton Island
Place_Keyword: Gosier Island
Place_Keyword: Curlew Island
Place_Keyword: MRGO
Place_Keyword: New Harbor Islands
Place_Keyword: North Islands
Place_Keyword: North-Central Gulf Coast
Place_Keyword: United States
Place_Keyword: Gulf of Mexico
Place_Keyword: Mississippi River Gulf Outlet
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_Person_Primary:
Contact_Person: David C. Twichell
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
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/2008/1195/images/mosaic_7007.jpg>
Browse_Graphic_File_Description: grey scale image of sidescan-sonar mosaic
Browse_Graphic_File_Type: JPEG
Native_Data_Set_Environment:
Microsoft Windows XP Professional x64 Edition Version 2003 Service Pack 2; ESRI ArcCatalog 9.2.4.1420
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: William W. Danforth
Publication_Date: 1997
Title:
XSonar/ShowImage: A complete system for rapid sidescan-sonar processing and display.
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 97-686
Publication_Information:
Publisher: U.S. Geological Survey
Cross_Reference:
Citation_Information:
Originator: A. Malinverno
Originator: M. Edwards
Originator: W.B.F. Ryan
Publication_Date: 1990
Title: Processing of SeaMARC swath sonar data.
Series_Information:
Issue_Identification: 15
Publication_Information:
Publisher: Journal of Oceanic Engineering
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:
Attribute_Accuracy:
Completeness_Report:
All available data were used to create the backscatter mosaic. Some lines with excess noise were clipped after the mosaic was completed.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
These data were navigated with a Differential Global Positioning System (DGPS) mounted above the interferometric sonar head. Unless noted, all DGPS data are referenced to WGS84. The layback distance between towed sidescan sonar fish and the mounted GPS antennae were measured on the ship and corrected for these navigation data.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: < 10 meters
Horizontal_Positional_Accuracy_Explanation:
The differential GPS is accurate within 1 to 2 meters. The layback of the towfish adds additional uncertainty due to changes in angle and scope of the tow cable in response to sea state and vessel speed
Vertical_Positional_Accuracy:
Quantitative_Vertical_Positional_Accuracy_Assessment:
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20070610
Ending_Date: 20070622
Source_Currentness_Reference: ground condition
Source_Contribution:
Data acquisition at sea: These sidescan-sonar data were collected with a Klein 3000 dual frequency sidescan sonar towed 3 meters astern of the R/V Acadiana. These data were acquired using SonarPro Software (version: none) during a cruise in June 2007. Data were collected along tracklines spaced 100 to 125 m apart at a speed of 1.5 to 2.5 m/s. The dual frequencies of the sonar system are 100 and 500 kHz . Navigation was by means of differential GPS. All sidescan-sonar data were logged digitally at a sample rate resulting in a 0.18-m pixel size in the across-track direction and approximately 0.14-m in the along-track direction following the methodology outlined in Danforth and others (1991) and Danforth (1997).
Source_Information:
Type_of_Source_Media: disc
Source_Contribution:
This composite sidescan-sonar mosaic was created by combining sidescan mosaic areas 5-9 (all in this publication).
Process_Step:
Process_Description:
Within XSonar Software (version: none) a median filtering routine (Malinverno and others, 1990) was applied to the raw sidescan-sonar data (.xtf) to remove speckle noise; the filter was 6 pixels across track by 3 pixels along track. The data were further processed to correct for fish altitude, slant and beam artifacts, and then merged with the navigation (Danforth, 1997). These 2007 data were affected by port noise on the following days 20070610-20070619. XSonar was edited to reduce the port highpass value (from 4095 to 2500), in an effort to improve the sonar image. Odd and even sidescan sonar lines were mapped seperately out of XSonar at 1 meter/pixel resolution. Sidescan areas were defined within the cruise domain such that the sonar images mapped in XSonar would be no larger than 200 Mb.
Process_Date: 2007
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Elizabeth A. Pendleton
Contact_Organization: U.S. Geological Survey
Contact_Position: 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) 548-8700x2259
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: ependleton@usgs.gov
Process_Step:
Process_Description:
The odd and even area files were imported into PCI Geomatica Software (version 10.1) to be digitally mosaicked together using PCI's OrthoEngine and procedures described in Paskevich (1996). The mosaicking process produces an enhanced, geographically correct, sidescan-sonar mosaic with 1 meter/pixel resolution. The composite mosaic was exported as a GeoTIFF image.
Process_Date: 2007
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Elizabeth A. Pendleton
Contact_Organization: U.S. Geological Survey
Contact_Position: 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) 548-8700x2259
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: ependleton@usgs.gov
Process_Step:
Process_Description:
The days that experienced portside noise problems (20070610-20070619) needed further processing to improve the mosaic image. Portside swaths that displayed as 'whiteout' within the mosaicked image had pixel values greater than 200 (out of 256) due to noise, and were deleted using the lasso tool in Adobe Photoshop CS2 (version 9.0.2).
Process_Date: 2008
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Elizabeth A. Pendleton
Contact_Organization: U.S. Geological Survey
Contact_Position: 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) 548-8700x2259
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: ependleton@usgs.gov
Process_Step:
Process_Description:
A lower resolution (5 meters/pixel) large mosaic representing all the sidescan sonar data collected in the 2007 cruise was produced by mosaicking a resampled version of each sidescan area (5-9) together using PCI's OrthoEngine (PCI Geomatica (version 10.1)). The default PCI format (*.pix) was exported from PCI as a GeoTIFF.
Source_Used_Citation_Abbreviation: MOSAIC5.tif
Source_Used_Citation_Abbreviation: MOSAIC6.tif
Source_Used_Citation_Abbreviation: MOSAIC7.tif
Source_Used_Citation_Abbreviation: MOSAIC8.tif
Source_Used_Citation_Abbreviation: MOSAIC9.tif
Process_Date: 2007
Source_Produced_Citation_Abbreviation: MOSAIC_07007.tif
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Elizabeth A. Pendleton
Contact_Organization: U.S. Geological Survey
Contact_Position: 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) 548-8700x2259
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: ependleton@usgs.gov
Process_Step:
Process_Description:
The final 5-m mosaic was reprojected into a geographic coordinate system (WGS84) in ArcGIS (version 9.2) using ArcToolbox - Data Matangement Tools - Projections and Transformations - Raster - Project Raster.
Source_Used_Citation_Abbreviation: MOSAIC_07007.tif
Process_Date: 2008
Source_Produced_Citation_Abbreviation: MOSAIC_07007_DD.tif
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Elizabeth A. Pendleton
Contact_Organization: U.S. Geological Survey
Contact_Position: 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) 548-8700x2259
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: ependleton@usgs.gov
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Row_Count: 8009
Column_Count: 10825
Vertical_Count: 1
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000000
Longitude_Resolution: 0.000000
Geographic_Coordinate_Units: Decimal degrees
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). The background color is set to 255 and can be turned off without removing data values.
Entity_and_Attribute_Detail_Citation: U.S. Geological Survey
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Wayne E. Baldwin
Contact_Organization: U.S. Geological Survey
Contact_Position: 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) 548-8700x2226
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: wbaldwin@usgs.gov
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 U.S. Geological Survey 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: WinZip
Format_Version_Number: 9.0
Format_Information_Content:
This WinZip file contains a geographic GeoTIFF image of side-scan sonar data collected offshore of the Chandeleur Islands, LA, and associated metadata.
File_Decompression_Technique: use WinZip or pkUnzip
Transfer_Size: 10.000 Mbytes
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<http://pubs.usgs.gov/of/2008/1195/GIS_catalog/Sidescan/mosaic_07007_dd.zip>
Access_Instructions: Data can be downloaded via 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:
This zip file contains 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: 20090128
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Elizabeth A. Pendleton
Contact_Organization: U.S. Geological Survey
Contact_Position: 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) 548-8700x2259
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: ependleton@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
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
Generated by mp version 2.8.14 on Thu Jan 29 11:12:00 2009