Sun-illuminated topographic imagery of the seafloor in the Stellwagen Bank National Marine Sanctuary region
Metadata also available as
Metadata:
- Identification_Information:
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- Citation:
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- Citation_Information:
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- Originator: Page C. Valentine
- Originator: Tanya S. Unger
- Originator: Jessica L. Baker
- Publication_Date: 2005
- Title:
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Sun-illuminated topographic imagery of the seafloor in the Stellwagen Bank National Marine Sanctuary region
- Edition: 1.0
- Geospatial_Data_Presentation_Form: remote-sensing image
- Series_Information:
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- Series_Name: Scientific Investigations Map
- Issue_Identification: 2840
- Publication_Information:
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- Publication_Place: Woods Hole Science Center, Woods Hole, MA
- Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
- Online_Linkage:
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\\env-fp-cau01\Shared\czm\MORIS_on_the_web\GIS_data\geological\sunillum.tif
- Larger_Work_Citation:
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- Citation_Information:
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- Originator: Page C. Valentine
- Publication_Date: 2005
- Title:
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Sea floor image maps showing topography, sun-illuminated topography, backscatter intensity, ruggedness, slope, and the distribution of boulder ridges and bedrock outcrops in the Stellwagen Bank National Marine Sanctuary region off Boston, Massachusetts
- Edition: 1.0
- Series_Information:
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- Series_Name: Scientific Investigations Map
- Issue_Identification: 2840
- Publication_Information:
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- Publication_Place: Woods Hole Science Center, Woods Hole, MA
- Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
- Other_Citation_Details: scale 1:60,000, 6 maps, 12 sheets
- Online_Linkage: <http://pubs.usgs.gov/sim/2005/2840/>
- Description:
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- Abstract:
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The sun-illuminated topographic imagery of the Stellwagen Bank National Marine Sanctuary region off Boston, Massachusetts covers an area of approximately 1100 square nautical miles. The Stellwagen Bank NMS Mapping Project is designed to provide detailed maps of the Stellwagen Bank region's environments and habitats and the first complete multibeam topographic and sea floor characterization maps of a significant region of the shallow EEZ. 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 up to 16 knots. Note: These data were reprojected from their native projection into North American Datum 1983 (NAD83) / Massachusetts State Plane coordinate system, Mainland Zone (FIPS zone 2001) meters by the Massachusetts Office of Coastal Zone Management on June 26, 2006.
- Purpose:
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Development of interpretive seabed maps, sea floor imagery, and a GIS database that are accessible to scientists, policymakers, managers, and the general public.
- Time_Period_of_Content:
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- Time_Period_Information:
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- Range_of_Dates/Times:
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- Beginning_Date: 1994
- Ending_Date: 1998
- Currentness_Reference: ground condition
- Status:
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- Progress: Complete
- Maintenance_and_Update_Frequency: As needed
- Spatial_Domain:
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- Bounding_Coordinates:
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- West_Bounding_Coordinate: -70.610103
- East_Bounding_Coordinate: -70.016938
- North_Bounding_Coordinate: 42.805823
- South_Bounding_Coordinate: 42.077570
- Keywords:
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- Theme:
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- Theme_Keyword_Thesaurus: General
- Theme_Keyword: Geographic Information Systems
- Theme_Keyword: GIS
- 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: Frederick G. Creed
- Theme_Keyword: Swath Bathymetry
- Theme_Keyword: topographic data
- Theme_Keyword: sea floor topography
- Theme_Keyword: bathymetry
- Theme_Keyword: sun-illuminated imagery
- Theme_Keyword: gray scale image
- Theme_Keyword: GeoTIFF image
- Theme:
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- Theme_Keyword_Thesaurus: ISO 19115 Topic Category
- Theme_Keyword: oceans and estuaries
- Theme_Keyword: imageryBaseMapsEarthCover
- Theme_Keyword: elevation
- Theme:
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- Theme_Keyword_Thesaurus:
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NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 6.0.0.0.0
- Theme_Keyword: Oceans > Bathymetry/Seafloor Topography > Seafloor Topography
- Theme_Keyword: Oceans > Bathymetry/Seafloor Topography > Bathymetry
- Place:
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- Place_Keyword_Thesaurus: General
- 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: Boston
- Place:
-
- Place_Keyword_Thesaurus:
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NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 6.0.0.0.0
- Place_Keyword: Ocean > Atlantic Ocean > North Atlantic Ocean
- Place_Keyword: Ocean > Atlantic Ocean > North Atlantic Ocean > Gulf Of Maine
- Place_Keyword:
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Continent > North America > United States Of America > Massachusetts
- Access_Constraints: none
- Use_Constraints:
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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.
Not to be used for navigational purposes.
- Point_of_Contact:
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- Contact_Information:
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- Contact_Person_Primary:
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- Contact_Person: Page C. Valentine
- Contact_Organization: U.S. Geological Survey
- Contact_Position: Research Geologist
- Contact_Address:
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- Address_Type: mailing and physical address
- Address: U.S. Geological Survey
- Address: 384 Woods Hole Rd.
- City: Woods Hole
- State_or_Province: MA
- Postal_Code: 02543-1598
- Country: USA
- Contact_Voice_Telephone: (508) 548-8700 x2239
- Contact_Facsimile_Telephone: (508) 457-2310
- Contact_Electronic_Mail_Address: pvalentine@usgs.gov
- Browse_Graphic:
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- Browse_Graphic_File_Name:
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<http://pubs.usgs.gov/sim/2005/2840/data/sunillum/sunillum-thumb.gif>
- Browse_Graphic_File_Description:
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Thumbnail image showing overview of the sun-illuminated topographic imager of the seafloor in the Stellwagen Bank National Marine Sanctuary region.
- Browse_Graphic_File_Type: GIF
- Browse_Graphic:
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- Browse_Graphic_File_Name:
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<http://pubs.usgs.gov/sim/2005/2840/data/sunillum/sunillum-browse.gif>
- Browse_Graphic_File_Description:
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Image showing overview of the sun-illuminated topographic imager of the seafloor in the Stellwagen Bank National Marine Sanctuary region.
- Browse_Graphic_File_Type: GIF
- Native_Data_Set_Environment:
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Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722
- Cross_Reference:
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- Citation_Information:
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- Originator: Page C. Valentine
- Originator: Tammie J. Middleton
- Originator: Sarah J. Fuller
- Publication_Date: 2001
- Title:
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Sea floor maps showing topography, sun-illuminated topography, and backscatter intensity of the Stellwagen Bank National Marine Sanctuary region off Boston, Massachusetts
- Edition: 1.01
- Series_Information:
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- Series_Name: Open-File Report
- Issue_Identification: 00-410
- Publication_Information:
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- 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/of00-410/>
- Cross_Reference:
-
- Citation_Information:
-
- Originator: Page C. Valentine
- Originator: Tanya S. Unger
- Originator: Jessica L. Baker
- Publication_Date: 2003
- Title:
-
Sun-illuminated sea floor topography of the Stellwagen Bank National Marine Sanctuary off Boston, Massachusetts
- Edition: 1.0
- Geospatial_Data_Presentation_Form: map
- Series_Information:
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- Series_Name: Geologic Investigations Map
- Issue_Identification: I-2676-B
- Publication_Information:
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- Publication_Place: Woods Hole Science Center, Woods Hole, MA
- Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
- Data_Quality_Information:
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- Attribute_Accuracy:
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- Attribute_Accuracy_Report:
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The ship's position was determined with an accuracy of 10 m or better using a Magnavox 4200 geographic positioning system (GPS) receiver in conjunction with differential GPS corrections transmitted by U.S. Coast Guard radio beacons. At the start of each day, casts were made to record the sound velocity profile of the water column in the area to be surveyed. Sound velocity information was updated during the day whenever the survey moved from one area to another. Tidal corrections based on NOAA's Boston tide gauge were used to reference depth data to mean lower low water. Sounding rates depend on water depth but vary from 2 to 4 per second in water depths less than 100 meters. Horizontal spatial resolution at these sounding rates is on the order of 10% of the water depth at 16 knots; however, vertical resolution is approximately 1% or better in the same depth range.
- Completeness_Report:
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The bathymetric data are displayed in real time on the Sun workstation using software designed and written by the Ocean Mapping Group, University of New Brunswick. This display allows data gaps to be identified during the survey and also gives a measure of the data quality.
- Positional_Accuracy:
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- Horizontal_Positional_Accuracy:
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- Horizontal_Positional_Accuracy_Report:
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Sounding rates depend on water depth but vary from 2 to 4 per second in water depths less than 100 meters. Horizontal spatial resolution at these sounding rates is on the order of 10% of the water depth at 16 knots; however, vertical resolution is approximately 1% or better in the same depth range.
- Vertical_Positional_Accuracy:
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- Vertical_Positional_Accuracy_Report:
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Sounding rates depend on water depth but vary from 2 to 4 per second in water depths less than 100 meters. Horizontal spatial resolution at these sounding rates is on the order of 10% of the water depth at 16 knots; however, vertical resolution is approximately 1% or better in the same depth range.
- Lineage:
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- Process_Step:
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- Process_Description:
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The navigation and topographic data were both edited 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).. 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 text file 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 ESRI's 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.
- Spatial_Data_Organization_Information:
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- Direct_Spatial_Reference_Method: Raster
- Raster_Object_Information:
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- Raster_Object_Type: Pixel
- Row_Count: 8024
- Column_Count: 4769
- Vertical_Count: 1
- Spatial_Reference_Information:
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- Horizontal_Coordinate_System_Definition:
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- Planar:
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- Grid_Coordinate_System:
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- Grid_Coordinate_System_Name: State Plane Coordinate System 1983
- State_Plane_Coordinate_System:
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- SPCS_Zone_Identifier: 2001
- Lambert_Conformal_Conic:
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- Standard_Parallel: 41.716667
- Standard_Parallel: 42.683333
- Longitude_of_Central_Meridian: -71.500000
- Latitude_of_Projection_Origin: 41.000000
- False_Easting: 200000.000000
- False_Northing: 750000.000000
- Planar_Coordinate_Information:
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- Planar_Coordinate_Encoding_Method: row and column
- Coordinate_Representation:
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- Abscissa_Resolution: 9.999980
- Ordinate_Resolution: 9.999980
- Planar_Distance_Units: meters
- Geodetic_Model:
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- Horizontal_Datum_Name: North American Datum of 1983
- Ellipsoid_Name: Geodetic Reference System 80
- Semi-major_Axis: 6378137.000000
- Denominator_of_Flattening_Ratio: 298.257222
- Vertical_Coordinate_System_Definition:
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- Altitude_System_Definition:
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- Altitude_Resolution: 1.000000
- Altitude_Encoding_Method:
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Explicit elevation coordinate included with horizontal coordinates
- Entity_and_Attribute_Information:
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- Detailed_Description:
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- Entity_Type:
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- Entity_Type_Label: Band_1
- Attribute:
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- Attribute_Label: ObjectID
- Attribute_Definition: Internal feature number.
- Attribute_Definition_Source: ESRI
- Attribute_Domain_Values:
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- Unrepresentable_Domain:
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Sequential unique whole numbers that are automatically generated.
- Attribute:
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- Attribute_Label: Value
- Attribute:
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- Attribute_Label: Count
- Overview_Description:
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- Entity_and_Attribute_Overview:
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Sun-illuminated topographic imagery combines contoured topography and sun-illuminated topographic imagery. The image shown here uses a sun elevation angle of 45 degrees above the horizon from an azimuth of 350 degrees and a vertical exaggeration of four times. In effect, topographic relief is enhanced by having the sun illuminate the sea floor from a position 10 degrees west of north so that shadows are cast on the southern flanks of seabed features. Unnatural-looking stripes and patterns oriented parallel or perpendicular to survey track lines are artifacts of data collection. Blank areas represent places where no data exists. The topographic imagery is identical to that shown on Sheet 3 of this report.
- Metadata_Reference_Information:
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- Metadata_Date: 20060626
- Metadata_Review_Date: 20050822
- Metadata_Contact:
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- Contact_Information:
-
- Contact_Organization_Primary:
-
- Contact_Organization: U.S. Geological Survey
- Contact_Person: Page C. Valentine
- Contact_Position: Research Geologist
- Contact_Address:
-
- Address_Type: mailing and physical address
- Address: U.S. Geological Survey
- Address: 384 Woods Hole Rd.
- City: Woods Hole
- State_or_Province: MA
- Postal_Code: 02543
- Country: USA
- Contact_Voice_Telephone: (508) 548-8700 x2239
- Contact_Facsimile_Telephone: (508) 457-2310
- Contact_Electronic_Mail_Address: pvalentine@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_Access_Constraints: None
- Metadata_Use_Constraints: None
Generated by mp version 2.9.6 on Fri Sep 04 11:48:45 2009