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: http://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: http://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. 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: http://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: http://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: http://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: http://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: http://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