Sun-illuminated Sea Floor Topographic Maps and Perspective View Imagery; Quadrangle 12

Metadata:

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Identification_Information:
Citation:
Citation_Information:
Originator:
Page C. Valentine, Tanya S. Unger, Jessica L. Baker, Chris Polloni
Publication_Date: 19990924
Publication_Time: 1200000
Title:
Sun-illuminated Sea Floor Topographic Maps and Perspective View Imagery; Quadrangle 12
Geospatial_Data_Presentation_Form: maps
Series_Information:
Series_Name: U.S. Geological Survey Open-File Report 99-363
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Larger_Work_Citation:
Citation_Information:
Originator:
Publication_Date:
Title:
Publication_Information:
Publisher:
Other_Citation_Details:
The full title is Sun-illuminated sea floor topographic maps and perspective view imagery of
Quadrangles 1-18, Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts.
Geospatial_Data_Presentation_Form: sun-illuminated sea floor topographic imagery
Online_Linkage:
<http://woodshole.er.usgs.gov>
Description:
Abstract:
This data set contains the topographic contours and sun-illuminated imagery of Quadrangle 12. This coverage is one in a series of 18 quadrangles in the Stellwagen Bank National Marine Sanctuary region. The project is designed to provide detailed maps of the Stellwagen Bank region's environments and habitats and the first complete multibeam bathymetric and sea floor characterization maps of a significant region of the shallow EEZ.
Purpose:
Development of a GIS database of sea floor imagery that is accessible to scientists, policymakers, managers, and the general public. Data were collected on four cruises over a two year period from the fall of 1994 to the fall of 1996. The surveys were conducted aboard the Canadian Hydrographic Service vessel Frederick G. Creed, a SWATH (Small Waterplane Twin Hull) ship that surveys at speeds of 16 knots. The multibeam data were collected utilizing a Simrad Subsea EM 1000 Multibeam Echo Sounder (95 kHz) that is permanently installed in the hull of the Creed.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19940815
Beginning_Time: 12000000
Ending_Date: 19980922
Ending_Time: 12000000
Currentness_Reference:
Multibeam data were collected from the years of 1994 to 1996. Contours and imagery were generated and edited through 1998.
Status:
Progress: completed
Maintenance_and_Update_Frequency: Contours are updated and maintained as needed.
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -70.22242833
East_Bounding_Coordinate: -70.03354918
North_Bounding_Coordinate: 42.56131304
South_Bounding_Coordinate: 42.44151293
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Geographic Information Systems
Theme_Keyword: GIS
Theme_Keyword: Woods Hole Field Center
Theme_Keyword: WHFC
Theme_Keyword: United States Geological Survey
Theme_Keyword: USGS
Theme_Keyword: SIMRAD SUBSEA EM 1000
Theme_Keyword: Frederick G. CREED
Theme_Keyword: Swath Bathymetry
Theme_Keyword: Multibeam Echo Sounder
Theme_Keyword: Topographic data
Theme_Keyword: Sea floor topography
Theme_Keyword: Bathymetry
Theme_Keyword: Sun-illuminated imagery
Theme_Keyword: Shaded relief imagery
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Massachusetts
Place_Keyword: MA
Place_Keyword: Stellwagen Bank National Marine Sanctuary
Place_Keyword: SBNMS
Place_Keyword: Shallow EEZ
Place_Keyword: EEZ
Place_Keyword: Gulf of Maine
Place_Keyword: Atlantic Ocean
Place_Keyword: Ocean
Access_Constraints: None
Use_Constraints: None.
Data_Set_Credit:
U.S. Geological Survey, National Oceanic and Atmospheric Administration, Canadian Hydrographic Service, University of New Brunswick
Native_Data_Set_Environment: OSF1 UNIX, ARC/INFO version 7.0.4
Cross_Reference:
Citation_Information:
Publication_Date: 1999
Publication_Time: 12000000
Title:
Sun-illuminated sea floor topography of Quadrangle 12 in the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts
Edition: 1
Geospatial_Data_Presentation_Form: map
Series_Information:
U.S. Geologial Survey Geologic Investigations Series Map I-2712, scale 1:25,000, 1 sheet
Cross_Reference:
Citation_Information:
Publication_Date: 1997
Publication_Time: 12000000
Title:
Sea Floor Topography of Quadrangle 12 in the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts
Edition: 1
Geospatial_Data_Presentation_Form: map
Series_Information:
U.S. Geologial Survey Open-File Report 97-685, scale 1:25,000, 1 sheet
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
Logical_Consistency_Report: None
Completeness_Report: None
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report: +-3 meters
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report: +-3 meters
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Simrad EM1000 Frederick K Creed
Publication_Date:
Title:
Geospatial_Data_Presentation_Form: none
Source_Scale_Denominator: 25000
Type_of_Source_Media: digital UNIX tar files on CD-ROM
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1994 - 1996
Source_Currentness_Reference:
Source_Citation_Abbreviation: USGS
Process_Step:
Process_Description:
Multibeam data were processed using SwathEd, a suite of multibeam software editing and display tools developed by Dr. John Hughes Clarke of the Ocean Mapping Group, University of New Brunswick (UNB).
The navigation and topographic data were both edited using this software. Tidal corrections were
obtained from NOAA's Boston Tide Gauge (Station 8443970) and merged into the data set using UNB's
tidal routines. The topographic information was converted into an ascii textfile containing lat,
long, and depth fields, using a script created by Bill Danforth at the U.S. Geological Survey.
The ascii file was brought into Arc/Info, and a grid was generated and processed using ESRIs Arc/Info
version 7.0.4 software. A point coverage containing depth values was created using the routine point-generate.
The grid was created based on the depth values for each of the points using the command pointgrid.
The grid was filtered with a 9 by 9 focalmedian filter. Contours were generated using latticecontour.
All editing and edgematching was done by hand using arcedit. The shaded relief images shown here were
created using a light source that is 45 degrees above the horizon from an azimuth of 350 degrees.
The vertical exaggeration in the images is four times. In effect, topographic relief is enhanced by
illuminating the sea floor from a position 10 degrees west of north so that shadows are cast on the
southern flanks of seabed features. Some features in the images are artifacts of data collection.
They are especially noticeable where the seabed is smooth and include small highs and lows and
unnatural-looking features and patterns that are oriented parallel or perpendicular to survey tracklines.
For a depiction of the topographic contours alone, and for an explanation of survey and topographic data
processing methods, see the companion maps by Valentine and others (1997a-r).
Topographic contour maps of all 18 quadrangles of the map series are available on a CD-ROM in EPS, PS,
Arc export, and PDF file formats (Valentine and others, 1998). Blank areas represent places where no data
exists.
Process_Date: Unknown
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Organization: USGS, Coastal and Marine Geology
Contact_Person: William Danforth
Contact_Position: Geologist Contact Address:
Address:
City Woods Hole State_or_Province MA Postal_Code 02543 Country USA
Contact_Voice_Telephone: 508-457-2274
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: bdanforth@usgs.gov
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: .00003
Longitude_Resolution: .00003
Geographic_Coordinate_Units: Decimal Degrees
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: GRS1980
Semi-major_Axis: 6,378,137
Denominator_of_Flattening_Ratio: 298.257
Vertical_Coordinate_System_Definition:
Depth_System_Definition:
Depth_Datum_Name: Local surface
Depth_Resolution: 1
Depth_Distance_Units: meters
Depth_Encoding_Method: Attribute value
Entity_and_Attribute_Information:
Overview_Description:
Entity_and_Attribute_Overview: Raw Simrad EM 1000 echo sounder data.
Entity_and_Attribute_Detail_Citation: Simrad Subsea A/S, Horten, Norway
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: USGS, Woods Hole Field Center
Contact_Person: Page Valentine
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) 457-2239
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: pvalentine@usgs.gov,
Resource_Description: None
Distribution_Liability:
In no event shall the creators, custodians, or distributors of this information be liable for any damages arising out of its use (or the inability to use it).
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: n/a
Digital_Transfer_Option:
Offline_Option:
Offline_Media: CD-ROM
Recording_Format: ISO 9660
Fees: Contact USGS for more information.
Metadata_Reference_Information:
Metadata_Date: 19990406
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
USGS Woods Hole Field Center 384 Woods Hole Road Woods Hole, MA 02543-1598
Contact_Person: William Danforth
Contact_Address:
Address_Type: mailing address
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: (508) 457-2274
Contact_Electronic_Mail_Address: bdanforth@usgs.gov
Contact_Instructions:
Another source at USGS of information about this metadata is Nancy Soderberg (e-mail: nsoderberg@usgs.gov )
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Access_Constraints: None
Metadata_Use_Constraints: None

Generated by mp version 2.4.10 on Tue Oct 05 13:58:30 1999