bh_30mhs: Hillshade of Composite Bathymetry 30 meter/pixel of Boston Harbor and Approaches
image of GIS layer

Data format: Raster Dataset - ESRI GRID

File or table name: bh_30mhs

Coordinate system: Universal Transverse Mercator

Theme keywords: U.S. Geological Survey, USGS, Coastal and Marine Geology Program, CMGP, Woods Hole Science Center, WHSC, Massachusetts Office of Coastal Zone Management, CZM, Seafloor, Marine Geology, ArcGIS Raster, Multibeam, Bathymetry, Reson SeaBat 8101, Reson, Topography, Odom Echotrac DF3200 MKII echosounder, echosounder, Odem, single-beam, vertical-beam, National Oceanic and Atmospheric Administration, NOAA, National Ocean Service, NOS, NOAA Ship Whiting, Hydrographic Survey, ESRI Grid, 32-bit floating point, oceans and estuaries, elevation, imageryBaseMapsEarthCover
Abstract: These data are high-resolution bathymetric measurements of the seafloor from Boston Harbor and the harbor approaches, Massachusetts. Approximately 170 km² of sidescan sonar and bathymetric data were collected by the National Oceanic and Atmospheric Administration (NOAA) Ship Whiting in 2000 and 2001 and reprocessed and gridded by the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey (USGS).

FGDC and ESRI Metadata:
Metadata elements shown with blue text are defined in the Federal Geographic Data Committee's (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM). Elements shown with green text are defined in the ESRI Profile of the CSDGM. Elements shown with a green asterisk (*) will be automatically updated by ArcCatalog. ArcCatalog adds hints indicating which FGDC elements are mandatory; these are shown with gray text.
Identification Information:


Citation:
Citation information:
Originators: Seth Ackerman


Title:
bh_30mhs: Hillshade of Composite Bathymetry 30 meter/pixel of Boston Harbor and Approaches
*File or table name: bh_30mhs


Publication date: 2006
*Geospatial data presentation form: raster digital data


Series information:
Series name: Open-File Report
Issue identification: 2006-1008

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/of/2006/1008/gis/datazipped/cbathy.zip


Larger work citation:
Citation information:
Originators: Ackerman, S.D., Butman, B., Barnhardt, W.B., Danforth, W.W., Crocker, J.M.


Title:
High-Resolution Geologic Mapping of the Inner Continental Shelf: Boston Harbor and Approaches, Massachusetts


Publication date: 2006


Series information:
Series name: Open-File Report
Issue identification: 2006-1008

Publication information:
Publication place: Woods Hole Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program

Other citation details:
1 DVD-ROM


Online linkage: <http://pubs.usgs.gov/of/2006/1008/>


Description:
Abstract:
These data are high-resolution bathymetric measurements of the seafloor from Boston Harbor and the harbor approaches, Massachusetts.  Approximately 170 km² of sidescan sonar and bathymetric data were collected by the National Oceanic and Atmospheric Administration (NOAA) Ship Whiting in 2000 and 2001 and reprocessed and gridded by the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey (USGS).

Purpose:
These data were collected by the National Oceanic and Atmospheric Administration (NOAA) National Ocean Service (NOS) branch as part of their periodic hydrographic mapping for nautical charting.  The raw datasets were provided by NOAA to the Massachusetts Office of Coastal Zone Management (CZM) and the U.S. Geological Survey (USGS) in Woods Hole, MA as part of a cooperative agreement to provide high resolution bathymetry and backscatter intensity maps and digital GIS information for resource management, scientific research, industry and the public.

*Language of dataset: en


Time period of content:
Time period information:
Range of dates/times:
Beginning date: 20000919
Ending date: 20011030

Currentness reference:
ground condition

Status:
Progress: Complete
Maintenance and update frequency: None planned

Spatial domain:
Bounding coordinates:
*West bounding coordinate: -71.055927
*East bounding coordinate: -70.814597
*North bounding coordinate: 42.438340
*South bounding coordinate: 42.256948

Local bounding coordinates:
*Left bounding coordinate: 330892.460000
*Right bounding coordinate: 350332.460000
*Top bounding coordinate: 4700050.520000
*Bottom bounding coordinate: 4680340.520000

Keywords:
Theme:
Theme keywords: U.S. Geological Survey, USGS, Coastal and Marine Geology Program, CMGP, Woods Hole Science Center, WHSC, Massachusetts Office of Coastal Zone Management, CZM, Seafloor, Marine Geology, ArcGIS Raster, Multibeam, Bathymetry, Reson SeaBat 8101, Reson, Topography, Odom Echotrac DF3200 MKII echosounder, echosounder, Odem, single-beam, vertical-beam, National Oceanic and Atmospheric Administration, NOAA, National Ocean Service, NOS, NOAA Ship Whiting, Hydrographic Survey, ESRI Grid, 32-bit floating point
Theme keyword thesaurus: General

Theme:
Theme keywords: oceans and estuaries, elevation, imageryBaseMapsEarthCover
Theme keyword thesaurus: ISO 19115 Topic Category

Place:
Place keywords: Massachusetts Bay, Atlantic Ocean, Boston Harbor, Nahant, Boston, Hull, Hubline, Boston Harbor Islands
Place keyword thesaurus: General

Stratum:
Stratum keywords: Seafloor
Stratum keyword thesaurus: General

Access constraints: None
Use constraints:
Data are not intended for navigational use.

These data should not be used at resolutions for which it is not intended.

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 person primary:
Contact person: Seth Ackerman
Contact organization: Massachusetts Office of Coastal Zone Management
Contact position: Geologist


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 x2315
Contact facsimile telephone: 508-457-2310


Contact electronic mail address: seth.ackerman@state.ma.us


*Native dataset format: Raster Dataset
*Native data set environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722


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Data Quality Information:


Logical consistency report:
These data have not been quantitatively compared to previous hydrographic data, although they generally agree with qualitative comparison of published NOAA charts.

Positional accuracy:
Horizontal positional accuracy:
Horizontal positional accuracy report:
All of the NOAA survey vessels were equipped with Trimble DSM212L Differential Global Positioning System (DGPS) receivers.  Launch 1005, which collected all of the multibeam bathymetry, was also equipped with a TSS POS/MV Model 320 (Position and Orientation System for Marine Vessels).  Standard bathymetric processing, including tide corrections, soundings accuracy, and quality control were done by the NOAA Office of Coast Survey.

Vertical positional accuracy:
Vertical positional accuracy report:
Tidal datum for this project is Mean Lower Low Water (MLLW).  The tide station at Boston, MA (844-3970) was the control for the vertical datum.

Lineage:
Source information:
Type of source media: External Hard Drive
Source contribution:
The original geophysical data for this project were collected during four hydrographic surveys conducted by NOAA NOS in 2000 and 2001 on the NOAA Ship Whiting and its launches 1005/1014.  Multibeam bathymetric data were acquired with a Reson SeaBat 8101 and sidescan sonar backscatter data were acquired with Edgetech model 272-T (100 kHz) or the Klein T-5500 (455 kHz) sonar systems.

Source time period of content:
Time period information:
Range of dates/times:
Beginning date: 20000919
Ending date: 20011030

Source currentness reference:
ground condition

Process step:
Process description:
A hull-mounted Reson SeaBat 8101 acquired the shallow-water multibeam data for all four surveys.  The Reson 8101 was operated at a frequency of 240 kHz and a maximum speed of 6 knots.  The system is designed for operation in water depths of 5 to 125 m, and has a horizontal range of 75 to 500 m that depends on water depth.  Each time the system fires or "pings", it collects 101 individual soundings in a swath oriented perpendicular to the vessel track.  Acquisition was monitored in real time with the ISIS software (version 5.29) and recorded to XTF format.  NOAA Office of Coast Survey converted the XTF data to CARIS HDCS (Hydrographic Data Cleaning System) format, then processed and tide-corrected the data with CARIS HIPS (Hydrographic Information Processing System) software. The CARIS HIPS database was transfered to the USGS/CZM in 2004 for use in this project.

The NOAA acquisition vessels were also equipped with Odom Echotrac DF3200 MKII echosounders that logged high-frequency (100 kHz) vertical-beam soundings concurrently throughout the sidescan sonar and multibeam bathymetry surveying operations.  Vertical-beam soundings were recorded in Hypack raw format and later converted to CARIS HDCS format.  The NOAA Office of Coast Survey cleaned and merged the data and performed tide corrections using CARIS HIPS.

Process step:
Process description:
Bathymetry soundings from the multibeam surveys were exported from CARIS HIPS at a 2-meter grid interval for each of the four survey areas and vertical-beam soundings from surveys H10990, H10992, and H10994 were exported from CARIS HIPS at a 5-meter grid interval.  The vertical-beam data from survey H01991 were processed by NOAA prior to their use of CARIS and a separate xyz file was provided for these soundings.  The eight soundings files were merged to create a master file of over 17 million soundings within the survey areas.

Process contact:
Contact information:
Contact person primary:
Contact person: Seth Ackerman
Contact organization: Massachusetts Office of Coastal Zone Management
Contact position: Geologist


Contact address:
Address type: mailing and physical address
Address:
c/o 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 x2315
Contact facsimile telephone: 508-457-2310


Contact electronic mail address: seth.ackerman@state.ma.us


Process step:
Process description:
GMT (Generic Mapping Tools - http://gmt.soest.hawaii.edu/) was used to create an interpolated grid of the bathymetry for the entire region. The soundings data were formatted for input into GMT and then filtered through the GMT block median routine to reduce the data and speed up the interpolation process. An interpolated grid was created using the GMT surface routine with a grid cell size of 30 m and a tension parameter of 0.5. The GMT grid was converted to an ASCII grid using the Gdal utility gdal_translate (FWTools, version 1.0.0a7 and Gdal, version 1.3.1).

Process contact:
Contact information:
Contact person primary:
Contact person: Seth Ackerman
Contact organization: Massachusetts Office of Coastal Zone Management
Contact position: Geologist


Contact address:
Address type: mailing and physical address
Address:
c/o 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 x2315
Contact facsimile telephone: 508-457-2310


Contact electronic mail address: seth.ackerman@state.ma.us


Process step:
Process description:
In ArcGIS 9.0 (ArcToolbox) the ASCII grid was imported to an ESRI raster grid (cell size = 30 m).

Process contact:
Contact information:
Contact person primary:
Contact person: Seth Ackerman
Contact organization: Massachusetts Office of Coastal Zone Management
Contact position: Geologist


Contact address:
Address type: mailing and physical address
Address:
c/o 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 x2315
Contact facsimile telephone: 508-457-2310


Contact electronic mail address: seth.ackerman@state.ma.us


Process step:
Process description:
Hillshaded in ArcMap v.9.1 (Spatial Analyst -> Hillshade. Input surface: bh_30mbath, Azimuth: 360, Altitude: 45, no shadows, Z factor: 10, Output cell size: 30)

Process contact:
Contact information:
Contact person primary:
Contact person: Seth Ackerman
Contact organization: Massachusetts Office of Coastal Zone Management
Contact position: Geologist


Contact address:
Address type: mailing and physical address
Address:
c/o 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 x2315
Contact facsimile telephone: 508-457-2310


Contact electronic mail address: seth.ackerman@state.ma.us


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Spatial Data Organization Information:


*Direct spatial reference method: Raster


Raster object information:
*Image format: ESRI GRID
*Number of bands: 1


*Row count: 657
*Column count: 648
*Vertical count: 1


*Cell size X direction: 30.000000
*Cell size Y direction: 30.000000


*Bits per pixel: 16
*Pyramid layers: FALSE
*Image colormap: FALSE
*Compression type: Default


*Raster object type: Grid Cell
*Raster display type: matrix values
*Raster origin: Upper Left


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Spatial Reference Information:


Horizontal coordinate system definition:
Coordinate system name:
*Projected coordinate system name: WGS_1984_UTM_Zone_19N
*Geographic coordinate system name: GCS_WGS_1984

Planar:
Grid coordinate system:
*Grid coordinate system name: Universal Transverse Mercator
Universal Transverse Mercator:
*UTM zone number: 19
Transverse mercator:
*Scale factor at central meridian: 0.999600
*Longitude of central meridian: -69.000000
*Latitude of projection origin: 0.000000
*False easting: 500000.000000
*False northing: 0.000000

Planar coordinate information:
*Planar coordinate encoding method: row and column
Coordinate representation:
*Abscissa resolution: 30.000000
*Ordinate resolution: 30.000000
*Planar distance units: meters

Geodetic model:
*Horizontal datum name: D_WGS_1984
*Ellipsoid name: WGS_1984
*Semi-major axis: 6378137.000000
*Denominator of flattening ratio: 298.257224

Vertical coordinate system definition:
Depth system definition:
Depth datum name: Mean lower low water

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Entity and Attribute Information:


Detailed description:
*Name: bh_30mhs


Entity type:
*Entity type label: bh_30mhs
*Entity type type: Table
*Entity type count: 255

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


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Distribution Information:


Distributor:
Contact information:
Contact person primary:
Contact person: Seth Ackerman
Contact organization: Massachusetts Office of Coastal Zone Management
Contact position: Geologist


Contact address:
Address type: mailing and physical address
Address:
c/o 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 x2315
Contact facsimile telephone: 508-457-2310


Contact electronic mail address: seth.ackerman@state.ma.us


Resource description: Downloadable Data


Distribution liability:
Although this data set has been used by the U.S. Geological Survey (USGS), no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and/or related materials.  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: ESRI Grid 16 bit integer
Format version number: ArcGIS 9.0
Format specification:
ESRI Grid
File decompression technique: no compression applied
*Transfer size: 0.227
*Dataset size: 0.227

Digital transfer option:
Online option:
Computer contact information:
Network address:
Network resource name: <http://pubs.usgs.gov/of/2006/1008/gis/datazipped/cbath.zip>
Network resource name: <http://pubs.usgs.gov/of/2006/1008/html/appendix1.html>
Network resource name: <http://pubs.usgs.gov/of/2006/1008/gis/OFR_2006_1008/grids/>

Offline option:
Offline media: DVD-ROM
Recording format: UDF

Fees: None


Technical prerequisites:
These data are available in Environmental Systems Research Institute (ESRI) GRID format. The user must have software capable of importing and processing the data file.


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Metadata Reference Information:


*Metadata date: 20060807


*Language of metadata: en


Metadata contact:
Contact information:
Contact person primary:
Contact person: Seth Ackerman
Contact organization: Massachusetts Office of Coastal Zone Management
Contact position: Geologist


Contact address:
Address type: mailing and physical address
Address:
c/o 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 x2315
Contact facsimile telephone: 508-457-2310


Contact electronic mail address: seth.ackerman@state.ma.us


*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

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Binary Enclosures:


Thumbnail:
Enclosure type: Picture



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