This data set includes the sedimentary environments for the sea floor offshore of northern and eastern Cape Cod, Massachusetts. This interpretation is based on data collected with a multibeam sea floor mapping system during USGS survey 98015, conducted November 9 - 25, 1998 and on data collected with a bottom sampling and photographic system during USGS survey 04011, conducted during May and June, 2004.
To release a digital map derived from multibeam observations, samples, and bottom photographs that shows the distribution of sea floor sedimentary environments off northern and northeastern Cape Cod, Massachusetts.
Currentness_Reference: publication date
Maintenance_and_Update_Frequency: None planned
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: Coastal ad Marine Geology Program
Theme_Keyword: Woods Hole Science Center
Theme_Keyword: sedimentary environments
Theme_Keyword: coarse bedload transport
Theme_Keyword: sea floor
Theme_Keyword: geologic interpretation
Theme_Keyword: ArcView Shapefile
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans and estuaries
Theme_Keyword: oceans and coastal
Place_Keyword: Cape Cod
Place_Keyword: Cape Cod National Seashore
Place_Keyword: United States
Place_Keyword: North America
Place_Keyword: Atlantic Ocean
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.
Image map showing the extent and coverage of the seafloor environment interpretation off of Eastern Cape Cod, MA
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 18.104.22.1682
All polygons were constructed in a consistent manner. No additional checks for topological consistency were performed on this data.
Interpretations of sedimentary environments are based on tonal changes in the backscatter data and all available textural data and bottom photography.
Navigation was by differential GPS; positional accuracy and therefore accuracy of the interpretations are to less than 10 m
DVD-ROM, multibeam imagery; DVD-ROM, bottom photos; CD-ROM, texture data
Source_Currentness_Reference: ground condition
Multibeam imagery produced from the bathymetric data acquired with a Simrad EM 1000 echosounder during USGS cruise 98015 aboard the Canadian Coast Guard vessel Frederick G. Creed; and the bottom photos and sediment analyses from USGS cruise 04011 aboard the R/V Rafael.
The distribution of sedimentary environments off northern and northeastern Cape Cod were interpreted from the backscatter mosaics. Lines and polygons were drawn in ArcView to define the various environments.
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.
Format_Specification: ESRI polygon shapefile
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).
Access_Instructions: Data are downloadable via the World Wide Web (WWW).
These data are available in Environmental Systems Research Institute (ESRI) shapefile format. The user must have ArcGISÂ® or ArcViewÂ® 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.
Contact_Person: Lawrence J. Poppe
Contact_Organization: U.S. Geological Survey
Address_Type: mailing and physical address
Address: 384 Woods Hole Road
City: Woods Hole
Contact_Voice_Telephone: (508) 548-8700 x2281
Contact_Facsimile_Telephone: (508) 457-2310
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata