Q1_SRELIEF.TIF - 6-m resolution gray-scale image of shaded-relief multibeam bathymetry in western Massachusetts Bay map Quadrangle 1
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Metadata:
- Identification_Information:
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- Citation:
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- Citation_Information:
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- Originator: Bradford Butman
- Originator: William W. Danforth
- Publication_Date: 2007
- Title:
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Q1_SRELIEF.TIF - 6-m resolution gray-scale image of shaded-relief multibeam bathymetry in western Massachusetts Bay map Quadrangle 1
- Edition: 1.0
- Geospatial_Data_Presentation_Form: remote-sensing image
- Series_Information:
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- Series_Name: Data Series
- Issue_Identification: 99
- 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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<http://pubs.usgs.gov/ds/99/massbay_gis/2_multibeam/imagery/q1_srelief.zip>
- Online_Linkage: <http://pubs.usgs.gov/ds/99/webpages/quad1.html>
- Larger_Work_Citation:
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- Citation_Information:
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- Originator: Butman, Bradford
- Originator: Valentine, Page C.
- Originator: Middleton, Tammie J.
- Originator: Danforth, William W.
- Publication_Date: 2007
- Title:
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A GIS Library of Multibeam Data for Massachusetts Bay and the Stellwagen Bank National Marine Sanctuary, Offshore of Boston, Massachusetts
- Edition: 1.0
- Series_Information:
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- Series_Name: Data Series
- Issue_Identification: 99
- 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/ds/99/>
- Description:
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- Abstract:
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The U.S. Geological Survey has conducted geologic mapping to characterize the sea floor offshore of Massachusetts. The mapping was carried out using a Simrad Subsea EM 1000 Multibeam Echo Sounder on the Frederick G. Creed on four cruises conducted between 1994 and 1998. The mapping was conducted in cooperation with the National Oceanic and Atmospheric Administration (NOAA) and with support from the Canadian Hydrographic Service and the University of New Brunswick.
The long-term goal of this mapping effort is to produce high-resolution geologic maps and a Geographic Information System (GIS) project that presents images and grids of bathymetry, shaded relief bathymetry, and backscatter intensity data from these surveys that will serve the needs of research, management and the public.
- Purpose:
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This GeoTIFF (Tagged Image File Format) image shows shaded-relief bathymetry in western Massachusetts Bay map Quadrangle 1 at 6-m resolution.
- 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: None planned
- Spatial_Domain:
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- Bounding_Coordinates:
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- West_Bounding_Coordinate: -70.788907
- East_Bounding_Coordinate: -70.599983
- North_Bounding_Coordinate: 42.322212
- South_Bounding_Coordinate: 42.203333
- Keywords:
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- Theme:
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- Theme_Keyword_Thesaurus: General
- Theme_Keyword: bathymetry
- Theme_Keyword: shaded-relief bathymetry
- Theme_Keyword: multibeam
- Theme_Keyword: image
- Theme_Keyword: GeoTIFF
- Theme_Keyword: 6-m resolution
- Theme_Keyword: sea floor
- Theme_Keyword: sea floor mapping
- Theme_Keyword: USGS Map I-2731
- Theme_Keyword: Simrad
- Theme_Keyword: EM 1000
- Theme_Keyword: Frederick G. Creed
- Theme_Keyword: Woods Hole Science Center
- Theme_Keyword: WHSC
- Theme_Keyword: Coastal and Marine Geology Program
- Theme_Keyword: CMGP
- Theme_Keyword: U.S. Geological Survey
- Theme_Keyword: USGS
- Theme:
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- Theme_Keyword_Thesaurus: ISO 19115 Topic Category
- Theme_Keyword: oceans
- Theme_Keyword: oceans and estuaries
- Theme_Keyword: oceans and coastal
- Theme_Keyword: elevation
- Theme_Keyword: imageryBaseMapsEarthCover
- Place:
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- Place_Keyword_Thesaurus: General
- Place_Keyword: Massachusetts Bay
- Place_Keyword: western Massachusetts Bay
- Place_Keyword: western Massachusetts Bay map Quadrangle 1
- Place_Keyword: Boston
- Place_Keyword: Massachusetts
- Place_Keyword: Stellwagen Basin
- Place_Keyword: MWRA ocean outfall
- Place_Keyword: MWRA
- Place_Keyword: Gulf of Maine
- Place_Keyword: United States
- Place_Keyword: North Atlantic Ocean
- 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.
- Point_of_Contact:
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- Contact_Information:
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- Contact_Organization_Primary:
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- Contact_Organization: U.S. Geological Survey
- Contact_Person: Bradford Butman
- Contact_Position: Oceanographer
- Contact_Address:
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- 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 x2212
- Contact_Facsimile_Telephone: (508) 457-2309
- Contact_Electronic_Mail_Address: bbutman@usgs.gov
- Hours_of_Service: 8 a.m. - 5 p.m.
- Native_Data_Set_Environment:
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Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780
- Cross_Reference:
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- Citation_Information:
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- Originator: Butman, Bradford
- Originator: Hayes, Laura
- Originator: Danforth, William W.
- Originator: Valentine, Page C.
- Publication_Date: 2003
- Title:
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Shaded relief and sea floor topography of Quadrangle 1 in western Massachusetts Bay offshore of Boston, Massachusetts
- Series_Information:
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- Series_Name: Geologic Investigations Series Map
- Issue_Identification: I-2731-B
- Publication_Information:
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- Publication_Place: Reston, VA
- Publisher: U.S. Geological Survey
- Online_Linkage: <http://pubs.usgs.gov/imap/i-2731b/>
- Data_Quality_Information:
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- Attribute_Accuracy:
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- Attribute_Accuracy_Report: There are no attributes associated with a GeoTIFF image.
- Completeness_Report:
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The multibeam bathymetric data, on which this image is based, were corrected for tidal elevation during the survey using sea level measured at the NOAA Boston tide gage. This assumes that the tidal elevation and phase are the same as Boston across the survey area. Further processing to correct for the spatial and temporal changes in tidal elevation across the survey area would improve the sounding data and may be undertaken at a later time.
- Positional_Accuracy:
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- Horizontal_Positional_Accuracy:
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- Horizontal_Positional_Accuracy_Report:
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These data were navigated with a Differential Global Positioning System (DGPS); they are accurate to +/- 3 meters, horizontally.
- Vertical_Positional_Accuracy:
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- Vertical_Positional_Accuracy_Report:
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These data have been corrected for vessel motion (roll, pitch, heave, yaw) and tidal offsets, and referenced to mean lower low water. The theoretical vertical resolution of the Simrad EM-1000 multibeam echosounder is 1% of water depth; roughly 30 - 50 cm within the study area. However, we found that the working vertical resolution of the system is roughly +/- 50 cm for water depths of 30 - 50 meters based on comparisons of grids from multi-year surveys of the same area.
- Lineage:
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- Source_Information:
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- Source_Citation:
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- Citation_Information:
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- Originator: U.S. Geological Survey
- Publication_Date: Unpublished Material
- Title:
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Multibeam bathymetric survey data collected by USGS in western Massachusetts Bay map quadrangle 1, 1994-1998
- Source_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
- Source_Currentness_Reference: ground condition
- Process_Step:
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- Process_Description:
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A suite of processing software (called SwathEd) (www.omg.unb.ca/~jhc/SwathEd.html), developed by the Ocean Mapping Group at the University of New Brunswick, Canada,
was used to process and grid the multibeam bathymetric soundings and produce shaded-relief images. The metadata for the grids describes the processing steps applied to the navigation and bathymetric soundings. The following processing steps produced the image of shaded-relief bathymetry:
1. Create a 6-m grid of the bathymetric soundings for Massachusetts Bay using the SwathEd routine weighgrid.
Command line: weigh_grid -fresh_start -omg -tide -coeffs -mindep -2 -maxdep -800 -beam_mask -beam_weight -custom_weight EM1000_Weights -butter -power 2 -cutoff 12 -lambda 3 gridFile filename.merged
2. Create a shaded relief image of the bathymetry using SwathEd routine addSUN (sun elevation of 45 degrees from 350, vertically exaggerating 4 times).
Command line: addSUN -elev 45 -azi350 -vert_exag 4.0 gridFile.r4 filename.shade
3. Use a two-point linear contrast stretch to enhance the shaded relief image:
Command line: stretchacres -low 150 -high 200 -in filename.shade -out filename_shade.stretch
4. Convert the contrast-stretched shaded relief image from SwathEd format to a tiff file using the netpbm utilities (<http://netpbm.sourceforge.net/>):
Command line: rawtopgm -headerskip 1024 image_width image_height filename_shade.stretch | pnmtotiff -none - > filename.tif
5. Create an ESRI world file (tfw) for the shaded relief tiff image for import to ArcView or ArcGIS. Copy bounding box and resolution information from the jview program output to the tfw file.
Command line: jview filename_shade.stretch
- Process_Date: Unknown
- Process_Contact:
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- Contact_Information:
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- Contact_Person_Primary:
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- Contact_Person: William Danforth
- Contact_Organization: U.S. Geological Survey
- Contact_Position: Operational Geologist
- Contact_Address:
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- 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 x2274
- Contact_Facsimile_Telephone: (508) 457-2310
- Contact_Electronic_Mail_Address: bdanforth@usgs.gov
- Hours_of_Service: 8 a.m. to 5 p.m. EST
- Process_Step:
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- Process_Description:
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Image shifted 1/2 grid cell to northwest (using the ArcMap/Data Management Tools/Projections and Transformations/Raster/Shift tool) to correct for an error identified in the SwathEd gridding algorithm in 2007. Correct world file.
- Process_Date: 200702
- Source_Produced_Citation_Abbreviation: q1_srelief.tif
- Source_Produced_Citation_Abbreviation: q1_srelief.tfw
- Process_Contact:
-
- Contact_Information:
-
- Contact_Person_Primary:
-
- Contact_Person: William Danforth
- Contact_Organization: U.S. Geological Survey
- Contact_Position: Operational 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 x2274
- Contact_Facsimile_Telephone: (508) 457-2310
- Contact_Electronic_Mail_Address: bdanforth@usgs.gov
- 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: 2233
- Column_Count: 2623
- Vertical_Count: 1
- Spatial_Reference_Information:
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- Horizontal_Coordinate_System_Definition:
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- Planar:
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- Map_Projection:
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- Map_Projection_Name: Mercator
- Mercator:
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- Standard_Parallel: 41.650000
- Longitude_of_Central_Meridian: -70.316667
- False_Easting: 0.000000
- False_Northing: 0.000000
- Planar_Coordinate_Information:
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- Planar_Coordinate_Encoding_Method: row and column
- Coordinate_Representation:
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- Abscissa_Resolution: 6.000000
- Ordinate_Resolution: 6.000000
- 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
- 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:
- Distribution_Information:
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- Distributor:
-
- 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 Road
- City: Woods Hole
- State_or_Province: Massachusetts
- Postal_Code: 02543-1598
- Country: USA
- Contact_Voice_Telephone: (508) 548-8700 x2212
- Contact_Facsimile_Telephone: (508) 457-2309
- Contact_Electronic_Mail_Address: bbutman@usgs.gov
- Hours_of_Service: 8 a.m. to 5 p.m. EST
- Resource_Description: Downloadable Data
- Distribution_Liability:
-
Although these data have been used by the U.S. Geological Survey (USGS), U.S. Department of the Interior (DOI), no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. 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:
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- Digital_Transfer_Information:
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- Format_Name: TIFF
- Format_Specification: GeoTIFF
- Format_Information_Content:
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A zip archive containing the GeoTIFF image, associated world file, and metadata.
- File_Decompression_Technique: zip archive
- Transfer_Size: 0.000
- Digital_Transfer_Option:
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- Online_Option:
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- Computer_Contact_Information:
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- Network_Address:
-
- Network_Resource_Name:
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<http://pubs.usgs.gov/ds/99/massbay_gis/2_multibeam/imagery/q1_srelief.zip>
- Access_Instructions: Data may be downloaded via the World Wide Web.
- Offline_Option:
-
- Offline_Media: DVD-ROM
- Recording_Capacity:
-
- Recording_Density: 4.75
- Recording_Density_Units: Gbytes
- Recording_Format: UDF
- Fees: None
- Technical_Prerequisites:
-
This image is available as a GeoTIFF image with an accompanying world file. To utilize this data, the user must have an image viewer, image processing or GIS software package capable of importing a GeoTIFF image.
- Distribution_Information:
-
- Distributor:
-
- Contact_Information:
-
- Contact_Organization_Primary:
-
- Contact_Organization: U.S. Geological Survey Information Services
- Contact_Address:
-
- Address_Type: mailing address
- Address: Box 25286 Denver Federal Center
- City: Denver
- State_or_Province: Colorado
- Postal_Code: 80225-0046
- Country: USA
- Contact_Voice_Telephone: (303) 202-4700
- Contact_Facsimile_Telephone: (303) 202-4188
- Hours_of_Service: 8 a.m. to 5 p.m. Mountain Time
- Resource_Description: Downloadable Data
- Distribution_Liability:
-
Although these data have been used by the U.S. Geological Survey (USGS), U.S. Department of the Interior (DOI), no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. 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: TIFF
- Format_Specification: GeoTIFF
- Format_Information_Content:
-
A zip archive containing the GeoTIFF image, associated world file, and metadata.
- File_Decompression_Technique: zip archive
- Transfer_Size: 0.000
- Digital_Transfer_Option:
-
- Offline_Option:
-
- Offline_Media: DVD-ROM
- Recording_Capacity:
-
- Recording_Density: 4.75
- Recording_Density_Units: Gbytes
- Recording_Format: UDF
- Fees: None
- Technical_Prerequisites:
-
This image is available as a GeoTIFF image with an accompanying world file. To utilize this data, the user must have an image viewer, image processing or GIS software package capable of importing a GeoTIFF image.
- Metadata_Reference_Information:
-
- Metadata_Date: 20070403
- Metadata_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 Road
- City: Woods Hole
- State_or_Province: MA
- Postal_Code: 02543-1598
- Country: USA
- Contact_Voice_Telephone: (508) 548-8700 x2212
- Contact_Facsimile_Telephone: (508) 457-2310
- Contact_Electronic_Mail_Address: bbutman@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
- Metadata_Extensions:
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- Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
- Profile_Name: ESRI Metadata Profile
Generated by mp version 2.9.1 on Wed Apr 04 07:59:56 2007