survey2_2m: Swath bathymetry gridded data (survey 2) collected by the U.S. Geological Survey surrounding Muskeget Channel, MA, November 2010 (Esri grid, UTM Zone 19N, WGS 84, 2-m resolution)

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 2014
Title:
survey2_2m: Swath bathymetry gridded data (survey 2) collected by the U.S. Geological Survey surrounding Muskeget Channel, MA, November 2010 (Esri grid, UTM Zone 19N, WGS 84, 2-m resolution)
Edition: 1.0
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2012-1258
Publication_Information:
Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage:
http://pubs.usgs.gov/of/2012/1258/GIS_catalog/bathy/Survey2/survey2_2m.zip
Larger_Work_Citation:
Citation_Information:
Originator: Elizabeth A. Pendleton
Originator: Jane F. Denny
Originator: William W. Danforth
Originator: Wayne E. Baldwin
Publication_Date: 2014
Title:
High-Resolution Swath Interferometric Data Collected within Muskeget Channel, Massachusetts
Edition: 1.0
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2012-1258
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: http://pubs.usgs.gov/of/2012/1258/
Originator: Barry J. Irwin
Description:
Abstract:
These data were collected in a collaboration between the Woods Hole Oceanographic Institution and the U.S. Geological Survey (USGS). The primary objective of this program was to collect baseline bathymetry for Muskeget Channel, Massachusetts, and identify areas of morphologic change within and around the channel. Repeat surveys in select areas were collected one month apart to monitor change. These data were collected to support an assessment of the effect on sediment transport that a tidal instream energy conversion facility would have within Muskeget Channel. Accurate data and maps of sea-floor topography are important first steps in monitoring bedform migration, fish habitat, marine resources, and environmental changes due to natural or human impacts. The data include high-resolution bathymetry, acoustic-backscatter intensity, sound velocity in water, and navigation data. These data were collected during two surveys between October 2010 and November 2011 onboard the research vessel (RV) Rafael using an SEA Ltd. SwathPlus interferometric sonar (234 kilohertz). More information about the cruise can be found on the Woods Hole Coastal and Marine Science Center field activity Web page at <http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2010-072-FA>
Purpose:
This grid represents approximately 4 square km of bathymetric data that were collected in 2010. These data are used to define the seafloor morphology surrounding the sand shoals and potential cable routes in the vicinity of Muskeget Channel, MA. This grid provides a representation of the seafloor during survey 2 as it was collected in November 2010.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20101116
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -70.491697
East_Bounding_Coordinate: -70.413518
North_Bounding_Coordinate: 41.417303
South_Bounding_Coordinate: 41.292913
Lidar_Bounding_Coordinates:
Left_Bounding_Coordinate: 375337.000000
Right_Bounding_Coordinate: 381649.000000
Bottom_Bounding_Coordinate: 4572343.000000
Top_Bounding_Coordinate: 4586051.000000
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Woods Hole Coastal and Marine Science Center
Theme_Keyword: WHCMSC
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: swath bathymetry
Theme_Keyword: bathymetry
Theme_Keyword: Esri grid
Theme_Keyword: WHCMSC field activity serial number 2010-072-FA
Theme_Keyword: SEA Ltd Swathplus interferometric sonar
Theme_Keyword: R/V Rafael
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: imageryBaseMapsEarthCover
Theme_Keyword: elevation
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: North America
Place_Keyword: Atlantic Ocean
Place_Keyword: Massachusetts
Place_Keyword: United States
Place_Keyword: Muskeget Channel
Place_Keyword: Vineyard Sound
Place_Keyword: Martha's Vineyard
Place_Keyword: Nantucket Sound
Place_Keyword: Chappaquiddick Island
Place_Keyword: Edgartown
Place_Keyword: Mutton Shoal
Place_Keyword: Muskeget Island
Place_Keyword: Nantucket Island
Place_Keyword: Tuckernuck Island
Place_Keyword: Wasque Point
Place_Keyword: Cape Poge
Place_Keyword: Katama Bay
Place_Keyword: Hawes Shoal
Place_Keyword: Norton Shoal
Place_Keyword: Bass Ledge
Place_Keyword: Shovelful Shoal
Place_Keyword: Wasque Shoal
Access_Constraints: None
Use_Constraints:
Not to be used for navigation. 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:
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 Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2259
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: ependleton@usgs.gov
Native_Data_Set_Environment:
Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.1850
Browse_Graphic:
Browse_Graphic_File_Name:
http://pubs.usgs.gov/of/2012/1258/GIS_catalog/bathy/Survey2/S2_thumb.png
Browse_Graphic_File_Description:
Woods Hole Coastal and Marine Science Center Swath interferometric bathymetry surrounding Muskeget Channel, MA
Browse_Graphic_File_Type: PNG
Cross_Reference:
Citation_Information:
Title:
Geological Interpretation of the Sea Floor Offshore of Edgartown, Massachusetts
Originator: Poppe, L.J.
Originator: McMullen, K.Y.
Originator: Foster, D.S.
Originator: Blackwood, D.S.
Originator: Williams, S.J.
Originator: Ackerman, S.D.
Originator: Moser, M.S.
Originator: Glomb, K.A.
Publication_Date: 2010
Geospatial_Data_Presentation_Form: document
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2009-1001
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: http://pubs.usgs.gov/of/2009/1001/
Cross_Reference:
Citation_Information:
Originator: Denny, J.F.
Originator: Danforth, W.W.
Originator: Foster, D.S.
Originator: Sherwood, C.R.
Publication_Date: 2009
Title:
Geophysical Data Collected off the South Shore of Martha's Vineyard, Massachusetts
Geospatial_Data_Presentation_Form: document
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2008-1288
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: http://pubs.usgs.gov/of/2008/1288/
Cross_Reference:
Citation_Information:
Title: Automatic Statistical Processing of Multibeam Echosounder Data
Originator: Calder, B.R.
Publication_Date: 2003
Edition: 1.0
Geospatial_Data_Presentation_Form: document
Series_Information:
Series_Name: International Hydrographic Review
Issue_Identification: Volume 4
Publication_Information:
Publication_Place: The Netherlands
Publisher: INT HYDROGRAPHIC BUREAU
Data_Quality_Information:
Logical_Consistency_Report:
Any spurious soundings or navigation points were removed during processing.
Completeness_Report:
Interferometric bathymetry collected during the second survey of 2010-072-FA were used to create this grid. Data from the second survey (on 20101119) reoccupied lines from the first survey and are contained here to provide a comparison for select areas to analyze bedform and seafloor change over a 1 month period. Data from the first survey are contained in a separate grid.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The navigation for these data was acquired with a Coda Octopus F180 Differential Global Positioning System + Wide Area Augmentation System (DGPS+WAAS); they are accurate to + or - 1 to 2 meters, horizontally. All DGPS data are referenced to WGS 84, and vertical distance between the pole-mounted interferometric sonar head, 0.5m below the sea surface, and the DGPS antenna located on the same pole on the bow of the R/V Rafael, 2.5 m above the sea surface, are corrected.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
The theoretical vertical accuracy of the SEA Ltd SwathPlus interferometric sonar is 1 % of water depth, approximately 0.01 to 0.44 m within the study area. An Octopus F180 Attitude and Positioning system was used to correct for vessel roll, pitch, heave, and yaw, which has a theoretical vertical accuracy of a few mm. Tidal offsets were corrected to MLLW using RTK GPS heights. Field tests using submerged targets suggest that the vertical accuracy of the RTK tidal correction is less than 30 cm. Gridding algorithms and cell sizes for these data could introduce errors as great as 3 m along the edges of the data. Gridding-induced errors are likely much smaller (< 0.2 m) for most of the study. Changes in ship draft due to water and fuel usage were not considered. Total vertical accuracy for these data are assumed to be + or - 50 cm.
Lineage:
Process_Step:
Process_Description:
SwathPlus Software (version: 3.7.10) was used to acquire the raw swath data (*.sxr) and output a processed soundings file (*.sxp). Several bathy filters were applied to the processed file within SwathPlus to remove erroneous soundings and reduce the density of the data. Corrections were also applied for speed of sound changes (using sound velocity profiles), ship motion, GPS antennae offsets, and transducer depth and angle below the surface. Bathy filters included a low amplitude (100%), range (1-m below the surface), box (0.5-m to avoid nadir), alongtrack 1 (depth difference of 10-m, window size 10-m, and learn rate of 0.6), alongtrack 2 (depth difference of 1-m, window size 1-m, and learn rate of 0.9), and a mean filter (0.1-m).
Process_Date: 2012
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Jane Denny
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) 548-8700x2311
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: jdenny@usgs.gov
Process_Step:
Process_Description:
CARIS (version: HIPS and SIPS 7.1; service pack 2) was used to further process, finalize, and create a surface from the bathy files (*.sxp) from SwathPlus. CARIS processing with HIPS (hydrographic information processing system) has a workflow that ensures the user has done all necessary corrections to the soundings before creating a final gridded surface. The workflow starts with creating a vessel file (the R/V Rafael for this cruise). The vessel file contains any information related to GPS, MRU, and water level offsets that weren't included during acquisition using SwathPlus. Additionally, the user can report any errors in offsets (i.e. MRU to transducer measurement error, usually around 1-2 cm), which will later be used to calculate TPU (total propagated uncertainty), which is a requirement for CUBE (Combined Uncertainty and Bathymetry Estimator) editing (Calder, 2003). The next steps in the HIPS workflow include creating a project and converting the *.sxp data to CARIS HDCS (hydrographic cesar) format. Sound velocity corrections are the next step in data processing. Errors in soundings due to additional sound refraction not accounted for by sound velocity profiles were done using the CARIS refraction editor. These artifacts can be recognized in a cross-swath profile of a relatively flat patch of sea floor. When viewing the swath data across a profile, the sea floor will appear to have a "frown" or "smile" when in fact the data should be flat across the profile. Insufficient and/or erroneous sound velocity information results in an under or over-estimate of water depth, which increases with distance from the center of the swath. Next a tide correction was applied in CARIS (described in the next process step) and merged with the soundings, and then the TPU was calculated in order to utilize the CUBE editor, which is an uncertainty based data cleaning tool that creates a 'best estimate' surface for the soundings. The cube surface is then used to further QC the soundings. Some lines required swath editing or subset editing as well as automated filtering, especially in the shallow water areas.The final step in the workflow was to finalize the surface (at 2 m resolution) and export it from CARIS in XYZ format, which can then be imported to other programs.
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_Date: 2013
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Type_of_Source_Media: disc
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20101116
Source_Currentness_Reference: ground condition
Source_Contribution:
Trackline acquisition at sea: These bathymetric data were collected with a SEA Ltd Swathplus interferometric sonar (234 kHz) mounted on the bow of the R/V Rafael of Woods Hole, MA. The data were acquired with SwathPlus Software (version: 3.7.10). Trackline spacing was 70 meters apart.
Source_Citation_Abbreviation: data acq.
Process_Step:
Process_Description:
In order to apply a tidal correction to the soundings, an offset from Mean Sea Level MSL) to Mean Lower Low Water (MLLW) (-2.48 m) was entered into the HYPACK configuration file for the RTK device (dev 1) setup prior to the survey. This value was calculated by setting a DGPS antenna on a number of survey stations around Martha's Vineyard and using the bench mark sheets in conjunction with the DGPS height calculations to determine the offset from MLLW to MSL. Calculated HYPACK RTK water level heights were then extracted from the raw HYPACK files using an AWK script (parseNovatelHypackTides.awk), which calculates the MLLW tide value for each Julian day of the survey. An offset of 2.57 meters was added to each calculated tide value (TID 2) to compensate for the RTK antenna to water line offset, and then the sign was inverted. Since HYPACK reports water level heights relative to MLLW, heights above the MLLW datum are reported as negative values because they are above the datum per standard surveying XYZ convention. The file resulting from running the AWK script produces a file of MLLW tidal height corrections formatted in the CARIS TID file format: YYYY/MM/DD HH:MM x.xx where x.xx is the correct water level height. The RTK heights were then merged into the processed CARIS depth soundings in the bathy processing workflow using the Tide load and Merge functions.
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) 548-8700 x2259
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: ependleton@usgs.gov
Process_Date: 2013
Process_Step:
Process_Description:
The 2 meter horizontal resolution tide corrected base surface that was finalized and exported from CARIS was gridded from a x,y,z text file. In ArcCatalog (version 9.3.1) an x,y,z file can be converted to a shapefile by right-clicking and choosing 'create feature class'. After a shapefile is created, Spatial Analyst-- 'convert features to raster' was used to create a grid from the shapefile. An output cell-size of 2 meters was used, and NoData values were left uninterpolated for this surface.
Process_Date: 2013
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Elizabeth 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
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2259
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: Grid Cell
Row_Count: 6854
Column_Count: 3156
Vertical_Count: 1
Distribution_Information:
Distributor:
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
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 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:
Digital_Form:
Digital_Transfer_Information:
Format_Name: AIG
Format_Version_Number: ArcGIS 9.3.1
Format_Information_Content:
This WinZip (v. 14.5) file contains a grid of bathymetric data surrounding Muskeget Channel, MA, and the associated metadata.
File_Decompression_Technique: Use WinZip or pkUnzip
Transfer_Size: 93.981
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://pubs.usgs.gov/of/2012/1258/GIS_catalog/bathy/Survey2/survey2_2m.zip
Network_Resource_Name:
http://pubs.usgs.gov/of/2012/1258/html/ofr2012-1258_GIS_catalog.html
Access_Instructions: Data can be downloaded via the World Wide Web (WWW)
Fees: None
Technical_Prerequisites:
The grid contained in the .zip file is available as an Esri binary grid. To utilize this data, the user must have a GIS software package capable of reading an Esri binary grid.
Metadata_Reference_Information:
Metadata_Date: 20140106
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Elizabeth 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_Access_Constraints: None
Metadata_Use_Constraints: None
Metadata_Time_Convention: local time
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Planar_Distance_Units: meters
Coordinate_Representation:
Abscissa_Resolution: 2.000000
Ordinate_Resolution: 2.000000
Grid_Coordinate_System:
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 19
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999600
Longitude_of_Central_Meridian: -69.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000
Geodetic_Model:
Horizontal_Datum_Name: D_WGS_1984
Ellipsoid_Name: WGS_1984
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257224
Vertical_Coordinate_System_Definition:
Depth_System_Definition:
Depth_Datum_Name: Mean Lower Low Water
Depth_Resolution: 0.1
Depth_Distance_Units: meters
Depth_Encoding_Method:
Explicit elevation coordinate included with horizontal coordinates
Generated by mp version 2.9.27 on Mon Jun 09 15:06:56 2014