This data set includes an outline of the multibeam bathymetric and backscatter dataset offshore of Cape Cod, Massachusetts. The multibeam data were collected with a multibeam sea floor mapping system during USGS survey 98015, conducted November 9 - 25, 1998. The surveys were conducted using a Simrad EM 1000 multibeam echo sounder mounted aboard the Canadian Coast Guard vessel Frederick G. Creed. This multibeam system utilizes 60 electronically aimed receive beams spaced at intervals of 2.5 degrees that insonify a strip of sea floor up to 7.5 times the water depth (swath width of 100 to 200 m within the survey area). The horizontal resolution of the beam on the sea floor is approximately 10% of the water depth. Vertical resolution is approximately 1 percent of the water depth.
Purpose:
To release a digital outline of a multibeam bathymetric and backscatter dataset from off Cape Cod.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2006
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -70.301563
East_Bounding_Coordinate: -69.837144
North_Bounding_Coordinate: 42.112872
South_Bounding_Coordinate: 41.616669
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: Field Activity Number 98015
Theme_Keyword: Frederick G. Creed
Theme_Keyword: Sea Floor Mapping
Theme_Keyword: Seafloor Mapping
Theme_Keyword: multibeam survey
Theme_Keyword: survey outline
Theme_Keyword: ArcView shapefile
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: Cape Cod
Place_Keyword: Massachusetts
Place_Keyword: East Coast
Place_Keyword: United States
Place_Keyword: North America
Place_Keyword: Atlantic Ocean
Access_Constraints: None
Use_Constraints:
Public domain data are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information.
The original multibeam backscatter data acquired with a Simrad EM 1000 echosounder during USGS cruise 98015 aboard the Canadian Coast Guard vessel Frederick G. Creed
was compiled to create the 4-m digital mosaic. The extent completed mosaic was traced to create the survey outline.
The original multibeam backscatter data acquired with a Simrad EM 1000 echosounder during USGS cruise 98015 aboard the Canadian Coast Guard vessel Frederick G. Creed
was compiled to create the 4-m digital mosaic. The extent completed mosaic was traced to create the survey outline.
Process_Step:
Process_Description:
The multibeam imagery was imported into the ArcView GIS project view. The multibeam imagery was outlined using the available graphic tools then converted to an ArcView shapefile.
The multibeam imagery was imported into the ArcView GIS project view. The multibeam imagery was outlined using the available graphic tools then converted to an ArcView shapefile.
The previously created northern and southern halves of the survey were combined to create a single shapefile showing the extent and coverage of the USGS multibeam survey 98015.
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: ID
Attribute:
Attribute_Label: AREA
Attribute_Definition: Area of polygon in native units.
Attribute_Definition_Source: USGS
Attribute:
Attribute_Label: PERIMETER
Attribute_Definition: Perimeter of polygon in native units.
Attribute_Definition_Source: USGS
Overview_Description:
Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Lawrence J. Poppe
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 x2314
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: lpoppe@usgs.gov
Resource_Description:
Downloadable Data: Outline of the multibeam survey completed during the U.S. Geological Survey (USGS), Coastal and Marine Geology Program (CMGP), Woods Hole Science Center (WHSC) cruise 98015
Distribution_Liability:
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:
Digital_Form:
Digital_Transfer_Information:
Format_Name: SHP
Format_Version_Number: 3.3
Format_Specification: ESRI Polygon Shapefile
Format_Information_Content:
The SHP file contains the geospatial data. The SHX file contains the index of the geospatial data. The DBF file contains the attribute data in dBASE format. The PRJ file contains the coordinate system information (optional). The AVL file contains the legend information (optional). The SBN and SBX files contain the spatial index of the geospatial data (optional). The XML file contains the metadata describing the data set <data set name>.shp.xml. An ASCII version of the metadata file. A browse graphic showing the data layer coverage and extent (optional).
File_Decompression_Technique: no compression applied
Access_Instructions: Data are downloadable 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
Fees: None
Technical_Prerequisites:
These data are available in Environmental Systems Research Institute (ESRI) shapefile format. The user must have ArcGIS® or ArcView® 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing data. A free data viewer, ArcExplorer, capable of displaying the data is available from ESRI at www.esri.com.
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 2006
Metadata_Reference_Information:
Metadata_Date: 20060317
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Lawrence J. Poppe
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 x2318
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: lpoppe@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
