MOSAIC - Composite Sidescan-Sonar Mosaic collected by the U.S. Geological Survey offshore of the Grand Strand, SC (1999 – 2003) (GeoTIFF)
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Metadata:
- Identification_Information:
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- Citation:
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- Citation_Information:
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- Originator: U.S. Geological Survey
- Publication_Date: 2007
- Title:
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MOSAIC - Composite Sidescan-Sonar Mosaic collected by the U.S. Geological Survey offshore of the Grand Strand, SC (1999 – 2003) (GeoTIFF)
- Edition: 1.0
- Geospatial_Data_Presentation_Form: remote-sensing image
- Series_Information:
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- Series_Name: Open-File Report
- Issue_Identification: 2005-1346
- Publication_Information:
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- 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/2005/1346/arcgis/mosaic/mosaic.zip>
- Larger_Work_Citation:
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- Citation_Information:
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- Originator: Baldwin, W.E.
- Originator: Denny, J.F.
- Originator: Schwab, W.C.
- Originator: Gayes, P.T.
- Originator: Morton, R.A.
- Originator: Driscoll, N.W.
- Publication_Date: 2007
- Title:
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Geologic Framework Studies of South Carolina's Long Bay from Little River Inlet to Winyah Bay, 1999-2003; geospatial data release
- Edition: 1.0
- Series_Information:
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- Series_Name: Open-File Report
- Issue_Identification: 2005-1346
- Publication_Information:
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- 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/2005/1346/>
- Description:
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- Abstract:
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In 1999, the USGS, in partnership with the South Carolina Sea Grant Consortium, began a study to investigate processes affecting shoreline change along the northern coast of South Carolina, focusing on the Grand Strand region. Previous work along the U.S. Atlantic coast shows that the structure and composition of older geologic strata located seaward of the coast heavily influences the coastal behavior of areas with limited sediment supply, such as the Grand Strand. By defining this geologic framework and identifying the transport pathways and sinks of sediment, geoscientists are developing conceptual models of the present-day physical processes shaping the South Carolina coast. The primary objectives of this research effort are: 1) to provide a regional synthesis of the shallow geologic framework underlying the coastal upland, shoreface and inner continental shelf, and define its role in coastal evolution and modern beach behavior; 2) to identify and model the physical processes affecting coastal ocean circulation and sediment transport, and to define their role in shaping the modern shoreline; and 3) to identify sediment sources and transport pathways; leading to construction of a regional sediment budget.
- Purpose:
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This data set contains the sidescan-sonar imagery collected offshore of the Grand Strand, SC 1999 - 2003. These data are used in conjunction with surficial sediment analyses to define the sediment distribution within the survey area.
- Time_Period_of_Content:
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- Time_Period_Information:
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- Range_of_Dates/Times:
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- Beginning_Date: 1999
- Ending_Date: 2003
- Currentness_Reference: ground condition
- Status:
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- Progress: Complete
- Maintenance_and_Update_Frequency: None planned
- Spatial_Domain:
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- Bounding_Coordinates:
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- West_Bounding_Coordinate: -79.177101
- East_Bounding_Coordinate: -78.492031
- North_Bounding_Coordinate: 33.876654
- South_Bounding_Coordinate: 33.143953
- Keywords:
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- Theme:
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- 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 mosaic
- Theme:
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- Theme_Keyword_Thesaurus: ISO 19115 Topic Category
- Theme_Keyword: oceans
- Theme_Keyword: oceans and coastal
- Theme_Keyword: oceans and estuaries
- Theme_Keyword: imageryBaseMapsEarthCover
- Theme_Keyword: geoscientificInformation
- Place:
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- Place_Keyword_Thesaurus: General
- Place_Keyword: South Carolina
- Place_Keyword: Grand Strand
- Place_Keyword: North Myrtle Beach
- Place_Keyword: Myrtle Beach
- Place_Keyword: Surfside
- Place_Keyword: Garden City
- Place_Keyword: Pawleys Island
- Place_Keyword: Waites Island
- Place_Keyword: Southeast United States
- Place_Keyword: United States
- Place_Keyword: Atlantic Ocean
- Access_Constraints: None
- Use_Constraints:
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The 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:
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- Contact_Information:
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- Contact_Organization_Primary:
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- Contact_Organization: U.S. Geological Survey
- Contact_Person: Jane Denny
- Contact_Position: Geologist
- Contact_Address:
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- 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 x2311
- Contact_Facsimile_Telephone: 508-457-2310
- Contact_Electronic_Mail_Address: jdenny@usgs.gov
- Browse_Graphic:
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- Browse_Graphic_File_Name: <http://pubs.usgs.gov/of/2005/1346/images/mosaic.jpg>
- Browse_Graphic_File_Description: grey-scale image of sidescan-sonar mosaic
- Browse_Graphic_File_Type: JPEG
- Native_Data_Set_Environment:
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Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780
- Data_Quality_Information:
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- Attribute_Accuracy:
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- Attribute_Accuracy_Report:
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These data measure the acoustic reflectivity of the seafloor. These values (Digital Number (DN)) are a relative measure of reflectivity within the study area and are internally consistent.
- Logical_Consistency_Report:
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These are raster data; all sidescan-sonar data collected during USGS field efforts offshore of Myrtle Beach, SC 1999 – 2003 are included. Processing removed any spurious data.
- Completeness_Report:
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All sidescan-sonar data collected during USGS field efforts offshore of Myrtle Beach, SC 1999 – 2003 are included. Spurious data were removed during processing.
- Positional_Accuracy:
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- Horizontal_Positional_Accuracy:
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- Horizontal_Positional_Accuracy_Report:
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DGPS is assumed to be accurate within 1-2 meters. Standard GPS is assumed accurate within 5-10 meters. 99% of the positional data is DGPS. Unless noted, all GPS/DGPS data is referenced to WGS84 (NAD83). Slant-range distance is recorded between the sidescan-sonar tow vehicle and a sidemount rigged with an acoustic transponder. Offset between the sidemount and GPS antennae is measured. Basic trigonomic calculations use the slant-range offset to calculate a 'fish' (tow-vehicle) navigation. An assumption in these calculations is that the tow-vehicle is traveling directly behind the vessel; movement to port or starboard is not accounted for within 'fish' navigation. Thus, the horizontal accuracy of the sidescan-sonar tow-vehicle is 10 meters.
- Lineage:
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- Process_Step:
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- Process_Description:
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The sidescan-sonar data were acquired with a Benthos (Datasonics) SIS 1000 CHIRP sonar and Edgetech DF-1000 dual-frequency sonar systems. The SIS-100 operates in a frequency range of 100 - 120 kHz; the DF-1000 operates at 100 and 500 kHz. The sidescan-sonar imagery offshore of the Grand Strand is comprised of data acquired on six geophysical cruises operated by the USGS during 1999 - 2003.
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). A median filtering routine (Malinverno and others, 1990) was applied to the sidescan-sonar data to remove speckle noise, resulting in a 0.73-m pixel size. The data for each survey were further processed and digitally mosaicked using PCI Geomatica Software and procedures described in Danforth and others (1991), Danforth (1997), and Paskevich (1992) resulting in an enhanced, geographically correct, sidescan-sonar mosaic with 2 meters/pixel resolution. The composite mosaic was exported as a TIFF image, with an associated ESRI world file.
- Process_Date: 1999 - 2003
- Process_Contact:
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- Contact_Information:
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- Contact_Person_Primary:
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- Contact_Person: Jane Denny
- Contact_Organization: U.S. Geological Survey
- Contact_Position: Geologist
- Contact_Address:
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- 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 x2311
- Contact_Facsimile_Telephone: 508-457-2310
- Contact_Electronic_Mail_Address: jdenny@usgs.gov
- Spatial_Data_Organization_Information:
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- Direct_Spatial_Reference_Method: Raster
- Raster_Object_Information:
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- Raster_Object_Type: Pixel
- Row_Count: 20000
- Column_Count: 15500
- Vertical_Count: 1
- Spatial_Reference_Information:
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- Horizontal_Coordinate_System_Definition:
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- Planar:
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- Grid_Coordinate_System:
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- Grid_Coordinate_System_Name: Universal Transverse Mercator
- Universal_Transverse_Mercator:
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- UTM_Zone_Number: 17
- Transverse_Mercator:
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- 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:
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- Planar_Coordinate_Encoding_Method: row and column
- Coordinate_Representation:
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- Abscissa_Resolution: 4.000000
- Ordinate_Resolution: 4.000000
- Planar_Distance_Units: meters
- Geodetic_Model:
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- 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:
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- Overview_Description:
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- Entity_and_Attribute_Overview:
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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).
- Entity_and_Attribute_Detail_Citation: USGS
- Distribution_Information:
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- Distributor:
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- Contact_Information:
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- Contact_Organization_Primary:
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- Contact_Organization: U.S. Geological Survey
- 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
- Contact_Facsimile_Telephone: 508-457-2310
- Resource_Description: Downloadable Data
- Distribution_Liability:
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Although all data have been used by the 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:
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- Digital_Form:
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- Digital_Transfer_Information:
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- Format_Name: TIFF
- Format_Version_Number: ArcGIS 9.0
- Format_Specification: GeoTIFF
- Format_Information_Content:
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File contains sidescan-sonar imagery collected offshore of the Grand Strand, SC
- File_Decompression_Technique: no compression applied
- Transfer_Size: 300 MB
- Digital_Transfer_Option:
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- Online_Option:
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- Computer_Contact_Information:
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- Network_Address:
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- Network_Resource_Name: <http://pubs.usgs.gov/of/2005/1346/arcgis/mosaic/mosaic.zip>
- Access_Instructions: Data can be downloaded via the World Wide Web (WWW)
- Offline_Option:
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- Offline_Media: DVD-ROM
- Recording_Capacity:
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- Recording_Density: 4.75
- Recording_Density_Units: Gbytes
- Recording_Format: UDF
- Fees: none
- Technical_Prerequisites:
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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:
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- Metadata_Date: 20070123
- Metadata_Contact:
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- Contact_Information:
-
- Contact_Person_Primary:
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- Contact_Organization: U.S. Geological Survey
- Contact_Person: Jane Denny
- 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 x2311
- Contact_Facsimile_Telephone: 508-457-2310
- Contact_Electronic_Mail_Address: jdenny@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:
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- Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
- Profile_Name: ESRI Metadata Profile
Generated by mp version 2.9.2 on Tue Mar 06 16:02:17 2007