BATH_OS5m - 5 meter ArcRaster grid of multibeam bathymetry of the offshore area of Cape Ann - Salisbury Beach Massachusetts Survey Area.

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 2008
Title:
BATH_OS5m - 5 meter ArcRaster grid of multibeam bathymetry of the offshore area of Cape Ann - Salisbury Beach Massachusetts Survey Area.
Edition: 1.0
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2007-1373
Publication_Information:
Publication_Place: Woods Hole Science Center, Woods Hole, Massachusetts
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage:
<https://pubs.usgs.gov/of/2007/1373/GIS/raster/bathymetry/bath_os5m.zip>
Larger_Work_Citation:
Citation_Information:
Originator: Walter A. Barnhardt
Originator: Brian D. Andrews
Originator: Seth D. Ackerman
Originator: Wayne E. Baldwin
Originator: Christopher J. Hein
Publication_Date: 2008
Title:
High-Resolution Geological Mapping of the Inner Continental Shelf: Cape Ann to Salisbury Beach, Massachusetts.
Edition: 1.0
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2007-1373
Publication_Information:
Publication_Place: Woods Hole Science Center, Woods Hole, Massachusetts
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage: <https://pubs.usgs.gov/of/2007/1373/>
Description:
Abstract:
These data were collected under a cooperative agreement with the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Science Center. Initiated in 2003, the primary objective of this program is to develop regional geologic framework information for the management of coastal and marine resources. Accurate data and maps of sea-floor geology are important first steps toward protecting fish habitat, delineating marine reserves, and assessing environmental changes due to natural or human impacts. The project is focused on the inshore waters (5-30m deep) of Massachusetts between the New Hampshire border and Cape Cod Bay.

Data collected for the mapping cooperative have been released in a series of USGS Open-File Reports<http://woodshole.er.usgs.gov/project-pages/coastal_mass/html/current_map.html>. This spatial dataset is from the Cape Ann and Salisbury Beach Massachusetts project area. They were collected in two separate surveys in 2004 and 2005 and cover approximately 325 square kilometers of the inner continental shelf. High resolution bathymetry and backscatter intensity were collected in 2004 and 2005. Seismic profile data, sediment samples and bottom photography were also collected in 2005.

Purpose:
The purpose of these data is to establish high-resolution acoustic depth measurements of the seafloor for regional geologic framework investigations. These data cover 257 square kilometers of the offshore survey area between Cape Ann and Salisbury Beach, Massachusetts, in depths between 7 m and 91m. The data were collected by Science Applications International Corporation (SAIC), in 2004 for the USGS, under contract to the University of New Hampshire.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20040223
Ending_Date: 20040316
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -70.823419
East_Bounding_Coordinate: -70.544192
North_Bounding_Coordinate: 42.900113
South_Bounding_Coordinate: 42.666644
Keywords:
Theme:
Theme_Keyword_Thesaurus: General
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: Woods Hole Science Center
Theme_Keyword: WHSC
Theme_Keyword: Bathymetry
Theme_Keyword: Seafloor
Theme_Keyword: Marine Geology
Theme_Keyword: Multibeam Echo Sounder
Theme_Keyword: ArcGIS Raster
Theme_Keyword: field activity serial number 04015
Theme_Keyword: Science Applications International Corporation
Theme_Keyword: SAIC
Theme_Keyword: RESON 8101
Theme_Keyword: R/V OceanExplorer
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: elevation
Theme_Keyword: imageryBaseMapsEarthCover
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: North America
Place_Keyword: United States
Place_Keyword: Atlantic Ocean
Place_Keyword: Gulf of Maine
Place_Keyword: Bigelow Bight
Place_Keyword: Merrimack River
Place_Keyword: Ipswich Bay
Place_Keyword: Massachusetts
Place_Keyword: Cape Ann
Place_Keyword: Salisbury Beach
Place_Keyword: Plum Island
Stratum:
Stratum_Keyword_Thesaurus: General
Stratum_Keyword: Seafloor
Temporal:
Temporal_Keyword_Thesaurus: General
Temporal_Keyword: 2004
Access_Constraints: None
Use_Constraints:
The intended scale of these data is 1:25,000 Data are not intended for navigational use. Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Brian Andrews
Contact_Organization: U.S. Geological Survey
Contact_Position: Geographer
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 x2348
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: bandrews@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: <https://pubs.usgs.gov/of/2007/1373/GIS/browse_jpg/bath_os5m.jpg>
Browse_Graphic_File_Description: black and white thumbnail image of bathymetry
Browse_Graphic_File_Type: JPEG
Native_Data_Set_Environment:
Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.2.6.1500
Cross_Reference:
Citation_Information:
Originator: Walter A. Barnhardt
Originator: Brian D. Andrews
Originator: Bradford Butman
Publication_Date: 2006
Title:
High-Resolution Mapping of the Inner Continental Shelf: Nahant to Gloucester, Massachusetts
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2005-1293
Publication_Information:
Publication_Place: Woods Hole Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage: <https://pubs.usgs.gov/of/2005/1293/>
Cross_Reference:
Citation_Information:
Originator: Seth D. Ackerman
Originator: Bradford Butman
Originator: Walter A. Barnhardt
Originator: William W. Danforth
Originator: James M. Crocker
Publication_Date: 2006
Title:
High-Resolution Geologic Mapping of the Inner Continental Shelf: Boston Harbor and Approaches, Massachusetts
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2006-1008
Publication_Information:
Publication_Place: Woods Hole Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage: <https://pubs.usgs.gov/of/2006/1008/>
Cross_Reference:
Citation_Information:
Originator: Science Applications International Corporation (SAIC)
Publication_Date: 20040430
Title: Southern Merrimack Embayment Multibeam Survey, Survey Report
Edition: SAIC Doc 04-TR-004
Series_Information:
Series_Name: Survey Report
Publication_Information:
Publication_Place: Newport, Rhode Island
Publisher: SAIC
Online_Linkage: <https://pubs.usgs.gov/of/2007/1373/html/appendix5.html>

Data_Quality_Information:
Completeness_Report:
Survey lines run for cross line junction analysis are not included in this grid.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
These data were navigated using data from U.S. Coast Guard Differential Global Positioning System (DGPS) network.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Vertical accuracy of <= to 0.5 meters for 95.8 percent of the soundings in water depths between 7-91 meters. These data were quantitatively compared by cross line junction analysis. 95.8 percent of the comparisons were within 50 cm (vertical) of each other. Ship motion (heave, pitch, yaw, roll) was recorded with a TSS POS/MV 320 Position and Orientation System. The NOAA tide station in Portland, ME 8418150 was the source of preliminary water level heights for Cape Ann to Salisbury Beach offshore survey area. Preliminary tide data for this station were downloaded from the NOAA CO-OPS web page <http://www.co-ops.nos.noaa.gov/> hydro.html). All tide data were annotated with Coordinated Universal Time (UTC).

The zoning parameters SAIC created were: On Portland, ME (8418150) + 8 minutes ratio 0.964 On Boston Light, MA (8444162) +2 minutes ratio 0.972 All bathymetry data collected during the survey were corrected for water level variations using water level files. Water level files for each tide zone were created from downloaded preliminary NOAA tide data using the Survey Analysis and area Based Editor (SABER) Create Water Level Files tool. Water level files contain water level heights that are subtracted algebraically from depths to correct the sounding for tide and water level. These water level files were applied to the multibeam data using the Apply Tides tool within the SABER software.

Comparison of the zoned 6-minute water level heights computed from Boston Light, MA (8444162) to those computed from Portland, ME (8418150) shows an average height difference of 0.009 meters and a standard deviation of 0.042 meters. The maximum and minimum differences were +0.125 meters and -0.078 meters. Because the Portland, ME (8418150) gauge is a NOAA Primary Control Tide Station water level zoned heights from that station were used to correct the soundings.

Sound velocity casts were taken every 2-4 hours with a Brooke Ocean Technology MVP 30 System and Applied Microsystems Smart Sound Velocity Sensor.

Lineage:
Source_Information:
Source_Contribution:
System Setup and Operation. The offshore bathymetric data were collected in 2004 using a hull-mounted RESON 8101 multibeam echo sounder operating at a frequency of 240 kHz. A cutoff angle of 57 degrees (114 degrees total swath width) was used for data collection. A TSS POS/MV Model 329 Position and Orientation System was used as the vessel's motion sensor. Sound velocity casts were taken every 2-4 hours with a Brooke Ocean Technology MVP 30 System and Applied Microsystems Smart Sound Velocity Sensor. The SAIC ISS2000 Integrated Survey System Software was used to monitor real-time data during the survey. A Trimble 4000 DGPS receiver was used for all navigation (SAIC, 2004).

A patch test was conducted at the beginning of the survey in order to measure roll angle offsets. Roll angle offsets can have a strong effect on the accuracy of depth measurements. The roll angle offset is the difference between the motion sensor vertical measurement and the nominal mount angle of the transducers. The calculated roll angle offsets were stored within the SABER acquisition software.

Process_Step:
Process_Description:
The majority of the multibeam data were initially edited onboard the survey vessel, using SAIC's Multi View Editor (MVE) program. This tool is a geo-referenced editor, which allows for both plan and profile views with each beam in its true geographic position and depth. Each data file was edited to remove noise, fish, etc. At the end of each leg, both the raw and processed data were backed up onto 4mm tapes and shipped to the Data Processing Center in Newport, RI.

Once the data were in Newport and had been extracted to local machines, track lines were created by extracting the sounder position from the multibeam data. The tracks were reviewed to confirm that no errors in navigation existed and that the tracks extended to the outermost bounds of the survey area.

After the application of preliminary tides and interpolated draft, multibeam binned-depth grids were generated. A 5-meter Pure File Magic (PFM) grid was generated and edited in area based mode using MVE. The 5-meter projected PFM allowed multiple line editing which enhances visualization and proves efficient in the MVE process to ensure data quality. If any anomalies were found in the sounding bins, the edited multibeam files were re-examined and re-edited as necessary. When all multibeam files were determined to be satisfactory, the data were binned to a 5-meter and 2-meter cell size, populating the bin with the average of all soundings in the bin and maintaining the position of the center of the bin.

Process_Date: 200403
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Science Applications International Corporation (SAIC)
Contact_Address:
Address_Type: mailing and physical address
Address: 221 Third St.
City: Newport
State_or_Province: RI
Postal_Code: 02840
Country: USA
Contact_Voice_Telephone: 401-847-4210
Contact_Facsimile_Telephone: 401-849-1585
Process_Step:
Process_Description:
Processed and edited multibeam line files were delivered to USGS by SAIC on 300 Gb external hard drive. SAIC delivered both the raw line files in GSF format, the processed line files in eXtended Triton Format (XTF) and the final grids in ASCII Raster format.
Process_Date: 20040430
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Bradford Butman
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
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2212
Contact_Facsimile_Telephone: 505-457-2310
Contact_Electronic_Mail_Address: bbutman@usgs.gov
Process_Step:
Process_Description:
USGS Grid Generation: The ASCII Raster file delivered by SAIC was produced with all survey lines including the main scheme, gap fill, and cross lines used for junction analysis. These cross lines are oriented at right angles to the main scheme (north-south) survey lines and extended shoreward into the nearshore survey area. These cross lines were not required for the final bathymetric grid.

A new CARIS HIPS project (ver 6.1) was created with the projection information set to Universal Transverse Mercator (UTM) Zone 19, WGS84. The Processed GSF files for all main scheme lines were imported to CARIS using the import/conversion wizard A 5 meter Bathymetry and Statistical Error (BASE) surface was built from the line files. All previous edit flags were imported and no further editing was done in CARIS.

Process_Date: 200709
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Brian Andrews
Contact_Organization: U.S. Geological Survey
Contact_Position: Geographer
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 x2348
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: bandrews@usgs.gov
Process_Step:
Process_Description:
CARIS to ESRI Conversion: The CARIS HIPS BASE surface was converted to an ArcGIS 32-bit floating point raster grid in a three step process. First, the CARIS BASE surface was imported to Interactive Visualizations Systems (IVS) Data Magician (DMagic ver. 6.5.1) .dtm and .geo format. Second, the DMagic file was exported to an ASCII Raster format with ESRI header. Finally the third step imported the ASCII raster file into an ArcGIS 32-bit floating point raster grid (bath_os5m) using the ArcToolbox (ArcGIS ver. 9.2) Conversion Tools-"ASCII to Raster Tool".
Process_Date: 200711
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Brian Andrews
Contact_Organization: U.S. Geological Survey
Contact_Position: Geographer
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 x2348
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: bandrews@usgs.gov

Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 5097
Column_Count: 4467
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: 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
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 5.001120
Ordinate_Resolution: 5.001120
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
Vertical_Coordinate_System_Definition:
Depth_System_Definition:
Depth_Datum_Name: mean lower low water
Depth_Resolution: 0.1 m
Depth_Distance_Units: meters
Depth_Encoding_Method: Attribute values

Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Value
Entity_Type_Definition: Depth in meters below mean lower low water
Entity_Type_Definition_Source: ESRI
Attribute:
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -7.88
Range_Domain_Maximum: -91.41
Attribute_Units_of_Measure: meters
Overview_Description:
Entity_and_Attribute_Overview:
Multibeam bathymetry in ESRI ArcRaster form. Data values represent depth in meters referenced to mean lower low water (MLLW).

Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Brian Andrews
Contact_Organization: U.S. Geological Survey, Woods Hole Science Center
Contact_Position: Geographer
Contact_Address:
Address_Type: mailing and physical address
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2348
Contact_Electronic_Mail_Address: bandrews@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: ESRI Grid
Format_Version_Number: ArcGIS 9.2
Format_Specification: ESRI Raster GRID format
Format_Information_Content:
Grid containing high-resolution bathymetric data collected in the offshore survey area of the Cape Ann to Salisbury Beach Survey Area.
File_Decompression_Technique: no compression applied
Transfer_Size: 89.887 mb
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<https://pubs.usgs.gov/of/2007/1373/GIS/raster/bathymetry/bath_os5m.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
Compatibility_Information: None
Fees: None
Technical_Prerequisites:
These data are available as a ArcInfo 32-bit floating point binary grid in Environmental Systems Research Institute (ESRI) format. The grid consists of two folders, one with the "grid name", and one "info" folder. The two folders for each grid are compressed into one file using WinZip (ver. 9.0) software. To utilize these data, the user must have software capable of uncompressing the WinZip file and importing and viewing an ESRI ArcRaster grid. The two folders for each grid must be uncompressed to the same folder. If during the process of extracting multiple grids in WinZip format to the same folder, the user is prompted by WinZip software to "overwrite existing files" in the info folder select the "yes" option.

Metadata_Reference_Information:
Metadata_Date: 20090106
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Brian Andrews
Contact_Organization: U.S. Geological Survey
Contact_Position: Geographer
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 x2348
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: bandrews@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

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