Swath bathymetry 13-m-cell-size grid of quadrangle 6 on Stellwagen Bank offshore of Boston, Massachusetts collected by the U.S. Geological Survey aboard the Frederick G. Creed from 1994-1996 (custom Mercator projection, NAD 83, Esri binary grid format)

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Page C. Valentine
Publication_Date: 2015
Title:
Swath bathymetry 13-m-cell-size grid of quadrangle 6 on Stellwagen Bank offshore of Boston, Massachusetts collected by the U.S. Geological Survey aboard the Frederick G. Creed from 1994-1996 (custom Mercator projection, NAD 83, Esri binary grid format)
Edition: 1
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:
Series_Name: Scientific Investigations Map
Issue_Identification: 3341
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: https://pubs.usgs.gov/sim/3341/data/bathy/SIM3341_13mbathy.zip
Larger_Work_Citation:
Citation_Information:
Originator: Page C. Valentine
Originator: Leslie B. Gallea
Publication_Date: 2015
Title:
Seabed maps showing topography, ruggedness, backscatter intensity, sediment mobility, and the distribution of geologic substrates in quadrangle 6 of the Stellwagen Bank National Marine Sanctuary region offshore of Boston, Massachusetts
Edition: 1.0
Series_Information:
Series_Name: Scientific Investigations Map
Issue_Identification: 3341
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: https://dx.doi.org/10.3133/sim3341
Online_Linkage: https://pubs.usgs.gov/sim/3341/
Description:
Abstract:
The U.S. Geological Survey (USGS), in cooperation with the National Oceanic and Atmospheric Administration's National Marine Sanctuary Program, has conducted seabed mapping and related research in the Stellwagen Bank National Marine Sanctuary region since 1993. The area is approximately 3,700 square kilometers (km2) and is subdivided into 18 quadrangles. Seven maps, at a scale of 1:25,000, of quadrangle 6 (211 km2) depict seabed topography, backscatter, ruggedness, geology, substrate mobility, mud content, and areas dominated by fine-grained or coarse-grained sand. Interpretations of bathymetric and seabed backscatter imagery, photographs, video, and grain-size analyses were used to create the geology-based maps. In all, data from 420 stations were analyzed, including sediment samples from 325 locations. The seabed geology map shows the distribution of 10 substrate types ranging from boulder ridges to immobile, muddy sand to mobile, rippled sand. Substrate types are defined on the basis of sediment grain-size composition, surficial morphology, sediment layering, and the mobility or immobility of substrate surfaces. This map series is intended to portray the major geological elements (substrates, features, processes) of environments within quadrangle 6. Additionally, these maps will be the basis for the study of the ecological requirements of invertebrate and vertebrate species that utilize these substrates and guide seabed management in the region.
Purpose:
The purpose of this dataset is to release the 13-meter by 13-meter cell-size bathymetry grid that was used as the basis for analysis and used to generate several subsequent datasets, some of which are released in other publications (1-m contours, terrain ruggedness) in quadrangle 6 of the Stellwagen Bank National Marine Sanctuary region.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1994
Ending_Date: 1996
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -70.222299
East_Bounding_Coordinate: -70.033471
North_Bounding_Coordinate: 42.322320
South_Bounding_Coordinate: 42.202807
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: Woods Hole Coastal and Marine Science Center
Theme_Keyword: WHCMSC
Theme_Keyword: sea-floor topography
Theme_Keyword: bathymetry
Theme_Keyword: Simrad EM1000
Theme_Keyword: Frederick G. Creed
Theme_Keyword: swath bathymetry
Theme_Keyword: Esri binary grid
Theme_Keyword: raster
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: geoscientificInformation
Theme_Keyword: elevation
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: Atlantic Ocean
Place_Keyword: North America
Place_Keyword: Stellwagen Bank
Place_Keyword: Stellwagen Bank National Marine Sanctuary
Place_Keyword: U.S. east coast
Place_Keyword: United States
Place_Keyword: Massachusetts
Place_Keyword: Massachusetts Bay
Access_Constraints: None.
Use_Constraints: Not to be used for navigation.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Page C. Valentine
Contact_Organization: U.S. Geological Survey
Contact_Position: Research 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 x2239
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: pvalentine@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: https://pubs.usgs.gov/sim/3341/data/bathy/q6_bathy.jpg
Browse_Graphic_File_Description:
Thumbnail images showing the 13-meter bathymetry grid in quadrangle 6 on Stellwagen Bank National Marine Sanctuary.
Browse_Graphic_File_Type: JPEG
Data_Set_Credit:
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 source of this information.
Native_Data_Set_Environment:
Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.4095
Cross_Reference:
Citation_Information:
Originator: Page C. Valentine
Originator: Tanya S. Unger
Originator: Jessica L. Baker
Originator: Christopher F. Polloni
Publication_Date: 1999
Title:
Sun-illuminated sea floor topographic maps and perspective-view imagery of quadrangles 1-18, Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 99-363
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: https://pubs.usgs.gov/of/of99-363/
Cross_Reference:
Citation_Information:
Originator: Page C. Valentine, editor
Publication_Date: 2005
Title:
Sea floor image maps showing topography, sun-illuminated topography, backscatter intensity, ruggedness, slope, and the distribution of boulder ridges and bedrock outcrops in the Stellwagen Bank National Marine Sanctuary region off Boston, Massachusetts
Series_Information:
Series_Name: Scientific Investigations Map
Issue_Identification: 2840
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: https://pubs.usgs.gov/sim/2005/2840/
Cross_Reference:
Citation_Information:
Originator: Bradford Butman
Originator: Page C. Valentine
Originator: Tammie J. Middleton
Originator: William W. Danforth
Publication_Date: 2007
Title:
A GIS library of multibeam data for Massachusetts Bay and the Stellwagen Bank National Marine Sanctuary, offshore of Boston, Massachusetts
Series_Information:
Series_Name: Data Series
Issue_Identification: 99
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: https://pubs.usgs.gov/ds/99/
Data_Quality_Information:
Logical_Consistency_Report:
The original bathymetry data were acquired and processed in a consistent manner. Although several individuals were responsible for processing the data, each individual followed the established processing techniques.
Completeness_Report:
These data represent all the bathymetry data available in quadrangle 6 of the Stellwagen Bank study area. These represent a more "raw" version of the data that has not undergone extensive smoothing. There are some small gaps of no data within the grid.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
These data were navigated with a differential global positioning system (DGPS) with an assumed accuracy of +/- 10 meters.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
These data have been corrected for vessel motion (roll, pitch, heave, yaw) and tidal offsets, and referenced to mean lower low water. The manufacturer reported vertical resolution of the Simrad EM-1000 multibeam echo sounder is 1% of water depth, which is better than 2 m given the depths within the study area (~30 to 184 meters). Data were corrected for tidal elevation using the NOAA Boston tide gauge.
Lineage:
Process_Step:
Process_Description:
Initial data collection and processing is described in Valentine and others 1999, Valentine 2005, and Butman and others, 2007. A summary of that information is presented here. Surveying was conducted aboard the Canadian Hydrographic Service vessel Frederick G. Creed using a hull mounted multibeam echo sounder. These data were collected using a Simrad Subsea EM1000 operating at 95 kHz. SwathEd software (version unknown) developed by the Ocean Mapping Group, University of New Brunswick, was used to process the bathymetric and navigation data. The processing included editing the data to remove spurious points as well as incorporate tidal corrections. Processing took place over a span of time, 1994 to 1996.
Process_Date: 1996
Process_Step:
Process_Description:
The remaining process steps are a function of incorporating information from the previous publications (noted in cross-references), along with processing notes maintained during data processing.
The final SwathEd-produced file (based on a 10-meter-grid-cell size) was converted to an ASCII file using the University of New Brunswick script r4toASCII. The format of the ASCII file is latitude, longitude, and depth. The ASCII file was converted to an ArcInfo ungenerate format using a Perl script. The resulting format is ID, longitude, latitude, and negative depth. Each point has a unique ID value.
Using ArcInfo 7.03, the ungenerate format was converted to a coverage format using the 'convert to arc' from 'generate tool' available in ArcTools. The 'build' command with the point option was then used to convert the data to a point coverage. This procedure generates the point locations stored in the ungenerate file, but does not incorporate the depth values. In order to include depth, the ungenerate file - which has location as well as depth - was converted to an ArcInfo table, using 'Tables' in ArcInfo. The structure of the ArcInfo table was defined to include the ID, longitude, latitude, and depth in the appropriate format and size. Longitude and latitude were defined as floating point numbers with six decimal places, while depth was defined as a floating point number with two decimal places. To add the depth value to the point coverage, ArcInfo 'Tables' was used to join the point attribute table (pat) of the coverage to the newly-generated data table based on the ID value. In order to join the tables, the data table ID field had to be renamed to match the automatically assigned coverage ID field.
The projection of the point coverage was defined in ArcInfo with the PROJECTDEFINE command and the following parameters: Projection Geographic; Datum NAD83; Units DD; Spheroid GRS80. This process was performed by Jessica Baker in 1997.
Then the coverage was projected to the custom Mercator projection using the ArcInfo PROJECT command with the following options: Projection Mercator; Datum NAD83, Spheroid GRS1980; Units Meters; Longitude of Central Meridian -70degrees 19minutes; Latitude of true scale 41degrees 39minutes; False Easting 0; False northing 0. This process was performed by Jessica Baker in 1997.
The final step was to convert the points to a grid. This was accomplished using the ArcInfo 'pointgrid' command. The depth attribute was gridded at a cell size of 13 meters, and the background value was set to nodata. This final processing step was performed in 1997, and then again by Tammie Middleton in 2001 and is the grid presented here.
The 13-meter cell-size was chosen because it appeared to be the best cell size to avoid striping in the data when processing with the SwathEd software.
Process_Date: 2001
Process_Step:
Process_Description:
Metadata for the original 13-m-cell-size grid was written to enable releasing the data as part of a USGS publication. The original work on Stellwagen Bank was based on 18 individual quadrangles, and the 13-m grid was the foundation of much of the subsequent work that appears on maps of the Stellwagen Bank area. The information used to generate metadata was based on previous publications, the extensive data processing log prepared by Tanya Unger and Jessica Baker, as well as the individual log files generated during ArcInfo data processing.
Process_Date: 2012
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: Grid Cell
Row_Count: 1031
Column_Count: 1210
Vertical_Count: 1
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Mercator
Mercator:
Standard_Parallel: 41.650000
Longitude_of_Central_Meridian: -70.316667
False_Easting: 0.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 13.000000
Ordinate_Resolution: 13.000000
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222
Vertical_Coordinate_System_Definition:
Depth_System_Definition:
Depth_Datum_Name: Mean lower low water
Depth_Resolution: 0.01
Depth_Distance_Units: meters
Depth_Encoding_Method: Implicit coordinate
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview:
These values represent depth. The more negative the value, the deeper the water.
Entity_and_Attribute_Detail_Citation: U.S. Geological Survey
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Page C. Valentine
Contact_Organization: U.S. Geological Survey
Contact_Position: Research 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 x2239
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: pvalentine@usgs.gov
Resource_Description:
SIM3341_13mbathy.zip - This file contains the Esri binary grid of the bathymetry data (q6_13mbathy), along with FGDC compliant metadata and the browse graphic q6_bathy.jpg. The binary grid is comprised of two folders - info and q6_13mbathy, each having numerous files. These combine to make the Esri binary grid format.
Distribution_Liability:
Neither the U.S. Government, the Department of the Interior, nor the U.S. Geological Survey, 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: ARCG
Format_Information_Content:
The WinZip contains the two folders associated with the Esri binary grid, as well as the browse graphic and associated metadata.
File_Decompression_Technique: WinZip
Transfer_Size: 2.5
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: https://pubs.usgs.gov/sim/3341/data/bathy/SIM3341_13mbathy.zip
Fees: None
Technical_Prerequisites:
These data are available as an ArcInfo 32-bit floating point binary grid in Esri format. The user must have a program capable of reading the Esri grid data format. The user must have software capable of uncompressing archived zip files, such as WinZip or Pkware. The directory structure as it appears in the WinZip file must be maintained or else the binary grid is unusable.
Metadata_Reference_Information:
Metadata_Date: 20150903
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
Generated by mp version 2.9.30 on Thu Sep 03 08:39:08 2015