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:
Citation:
Citation_Information:
Originator: Bradford Butman
Originator: William W. Danforth
Publication_Date: 2007
Title:
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:
Series_Name: Data Series
Issue_Identification: 99
Publication_Information:
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/massbay_gis/2_multibeam/imagery/q1_srelief.zip>
Online_Linkage: <http://pubs.usgs.gov/ds/99/webpages/quad1.html>
Larger_Work_Citation:
Citation_Information:
Originator: Butman, Bradford
Originator: Valentine, Page C.
Originator: Middleton, Tammie J.
Originator: Danforth, William W.
Publication_Date: 2007
Title:
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:
Series_Name: Data Series
Issue_Identification: 99
Publication_Information:
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:
Abstract:
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:
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:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1994
Ending_Date: 1998
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -70.788907
East_Bounding_Coordinate: -70.599983
North_Bounding_Coordinate: 42.322212
South_Bounding_Coordinate: 42.203333
Keywords:
Theme:
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:
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:
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:
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:
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:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780
Cross_Reference:
Citation_Information:
Originator: Butman, Bradford
Originator: Hayes, Laura
Originator: Danforth, William W.
Originator: Valentine, Page C.
Publication_Date: 2003
Title:
Shaded relief and sea floor topography of Quadrangle 1 in western Massachusetts Bay offshore of Boston, Massachusetts
Series_Information:
Series_Name: Geologic Investigations Series Map
Issue_Identification: I-2731-B
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: <http://pubs.usgs.gov/imap/i-2731b/>

Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report: There are no attributes associated with a GeoTIFF image.
Completeness_Report:
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:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
These data were navigated with a Differential Global Positioning System (DGPS); they are accurate to +/- 3 meters, horizontally.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
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:
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: Unpublished Material
Title:
Multibeam bathymetric survey data collected by USGS in western Massachusetts Bay map quadrangle 1, 1994-1998
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 1994
Ending_Date: 1998
Source_Currentness_Reference: ground condition
Process_Step:
Process_Description:
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:
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:
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:
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Pixel
Row_Count: 2233
Column_Count: 2623
Vertical_Count: 1

Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
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:
Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:
Abscissa_Resolution: 6.000000
Ordinate_Resolution: 6.000000
Planar_Distance_Units: meters
Geodetic_Model:
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:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Band_1
Attribute:
Attribute_Label: ObjectID
Attribute_Definition: Internal feature number.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain:
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Value
Attribute:
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:
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:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<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:
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