MB_BACKPC30M.TIF - 30-m resolution image of shaded relief multibeam bathymetry in Massachusetts Bay, pseudocolored by backscatter intensity
Metadata also available as - [Questions & Answers] - [Parseable text]
Metadata:
- Identification_Information:
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- Citation:
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- Citation_Information:
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- Originator: Bradford Butman
- Originator: Page C. Valentine
- Originator: William W. Danforth
- Publication_Date: 2007
- Title:
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MB_BACKPC30M.TIF - 30-m resolution image of shaded relief multibeam bathymetry in Massachusetts Bay, pseudocolored by backscatter intensity
- 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/mb_backpc30m.zip>
- Online_Linkage: <http://pubs.usgs.gov/ds/99/webpages/massbay.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 multibeam bathymetry, pseudo-colored by backscatter intensity, in Massachusetts Bay at 30-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: ISO 19115 Topic Category
- Theme_Keyword: oceans
- Theme_Keyword: oceans and estuaries
- Theme_Keyword: oceans and coastal
- Theme_Keyword: geoscientificInformation
- Theme_Keyword: imageryBaseMapsEarthCover
- Theme_Keyword: elevation
- Theme:
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- Theme_Keyword_Thesaurus: General
- Theme_Keyword: backscatter intensity
- Theme_Keyword: pseudo-colored
- Theme_Keyword: multibeam
- Theme_Keyword: image
- Theme_Keyword: GeoTIFF
- Theme_Keyword: 30-m resolution
- Theme_Keyword: sea floor
- Theme_Keyword: sea floor mapping
- Theme_Keyword: USGS Map I-2734
- 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
- Place:
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- Place_Keyword_Thesaurus: General
- Place_Keyword: Massachusetts
- Place_Keyword: Massachusetts Bay
- Place_Keyword: Boston
- Place_Keyword: Gloucester
- Place_Keyword: Stellwagen Basin
- Place_Keyword: Stellwagen Bank
- Place_Keyword: Stellwagen Bank National Marine Sanctuary
- Place_Keyword: SBNMS
- Place_Keyword: Jeffreys Ledge
- Place_Keyword: MWRA ocean outfall
- Place_Keyword: MWRA
- Place_Keyword: Massachusetts Bay Disposal Site
- Place_Keyword: MBDS
- Place_Keyword: Tillies Bank
- Place_Keyword: Race Point Channel
- 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:
-
- Contact_Information:
-
- Contact_Organization_Primary:
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- Contact_Organization: U.S. Geological Survey
- Contact_Person: Bradford Butman
- Contact_Position: Oceanographer
- Contact_Address:
-
- 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
- Data_Quality_Information:
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- Attribute_Accuracy:
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- Attribute_Accuracy_Report: No attributes are associated with these data.
- Logical_Consistency_Report: These data are logically consistent.
- Completeness_Report:
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These data are complete. No further processing and/or modifications will be made to these data.
- 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 Massachusetts Bay, 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 (UNB), Canada, was used to process and grid the multibeam bathymetric soundings and backscatter intensity data, and to produce images. The metadata for the grids describes the processing steps applied to the navigation and bathymetric soundings. The following processing steps produced the shaded relief image of bathymetry, colored by backscatter intensity:
1. Create backscatter files that can be then mosaicked from the backscatter time series:
Command line: getBeamPattern filename (prefix only)
Command line: makess -pixel 3.0 -beam_patt beampatt filename (prefix only) output.ss
Command line: glfill output.ss output.ss_fill (fills in data dropouts).
2. Mosaic all the backscatter files created in the last step (for each output.ss_fill), and then use a two point linear contrast stretch to enhance the backscatter image.
Command line: mos2 -autoseam -maxazi 10 -maxdist 10 mosaic_file output.ss_fill
Command line: stretchacres -low 180 -high 220 -in mosaic_file -out mosaic_file.stretch
3. 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
4. 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
5. Create an image of shaded-relief topography, colored by backscatter intensity:
Command line: mix_ci -c mosaic_file.stretch -i filename_shade.stretch -m mosaic_file.pseudo
6. Create a tiff from the psuedocolored backscatter mosaic file using the netpbm utilities (<http://netpbm.sourceforge.net/>):
Command line: rawtopgm -headerskip 1024 image_width image_height mosaic_file.pseudo | pnmtotiff -none - > mosaic_pseudo.tif
7. Create an ESRI world file (tfw) for the pseudocolored backscatter intensity 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 mosaic_file.pseudo
- Process_Date: Unknown
- 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
- Hours_of_Service: 8 a.m. to 5 p.m. EST
- Process_Step:
-
- Process_Description:
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Reprocessing to correct projection error
An error in the UNB processing software that resulted in the multibeam observations not being properly projected onto a plane was discovered in 2003. These software errors were corrected and the data re-gridded. The images of pseudocolored backscatter intensity in the Stellwagen Bank region presented here may differ from preliminary versions included in the following publications:
Butman, B., and Lindsay, J.A. (Eds.), 1999, A marine GIS Library for Massachusetts Bay: focusing on Disposal sites, Contaminated Sediments, and Sea Floor Mapping: U.S. Geological Survey Open-File Report 99-439, 1 CD-ROM. (Also available on line at <http://pubs.usgs.gov/of/of99-439/start.htm>)
Gutierrez, B.T., Butman, Bradford, and Blackwood, D.S., 2001, Photographs of the sea floor of western Massachusetts Bay, offshore of Boston, Massachusetts, July 1999: U.S. Geological Survey Open-File Report 00-427, 1 CD-ROM. (Also available on line at <http://pubs.usgs.gov/of/of00-427/>)
Valentine, P.C., Middleton, T., and Fuller, S., 2001, Maps showing sea floor topography, sun-illuminated sea floor topography, and backscatter intensity of the Stellwagen Bank National Marine Sanctuary region off Boston, Massachusetts: USGS Open-File Report #00-410, 1 CD-ROM, scale 1:60,000. (Also available on line at <http://pubs.usgs.gov/of/of00-410/>)
- Process_Date: Unknown
- 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
- 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: mb_backpc30m.tif
- Source_Produced_Citation_Abbreviation: mb_backpc30m.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:
-
- Direct_Spatial_Reference_Method: Raster
- Raster_Object_Information:
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- Raster_Object_Type: Pixel
- Row_Count: 2687
- Column_Count: 2407
- 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:
-
- 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: 30.000000
- Ordinate_Resolution: 30.000000
- 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
- Vertical_Coordinate_System_Definition:
-
- Depth_System_Definition:
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- Depth_Datum_Name: Mean lower low water
- Depth_Resolution: 0.5
- Depth_Distance_Units: Meters
- Depth_Encoding_Method: Explicit depth coordinate included with horizontal coordinates
- Entity_and_Attribute_Information:
-
- 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: Red
- Attribute:
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- Attribute_Label: Green
- Attribute:
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- Attribute_Label: Blue
- Attribute:
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- Attribute_Label: Count
- Overview_Description:
- Distribution_Information:
-
- 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:
-
- 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:
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- Network_Resource_Name:
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<http://pubs.usgs.gov/ds/99/massbay_gis/2_multibeam/imagery/mb_backpc30m.zip>
- Access_Instructions: Data may be downloaded via the World Wide Web.
- Offline_Option:
-
- Offline_Media: DVD-ROM
- Recording_Capacity:
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- 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: 20070328
- 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 Mar 28 12:51:12 2007