bottomtype: Defined Map Units of the seafloor of Boston Harbor and Approaches
image of GIS layer

Data format: Shapefile

File or table name: bottomtype

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, field activity serial number RAFA04019, Interpretation, Bathymetry, Backscatter, Slope, Topography, National Oceanic and Atmospheric Administration, NOAA, National Ocean Service, NOS, NOAA Ship Whiting, Hydrographic Survey, ESRI Shapefile, Bottom Type, oceans and estuaries, geoscientificinformation
Abstract: This data is a qualitatively-derived interpretative polygon shapefile defining the bottom types 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:
bottomtype: Defined Map Units of the seafloor of Boston Harbor and Approaches
*File or table name: bottomtype


Publication date: 2006
*Geospatial data presentation form: vector 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/bottomtype.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:
This data is a qualitatively-derived interpretative polygon shapefile defining the bottom types 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:
The geophysical dataset 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: -71.054017
*East bounding coordinate: -70.816866
*North bounding coordinate: 42.437853
*South bounding coordinate: 42.256352

Local bounding coordinates:
*Left bounding coordinate: 331048.510007
*Right bounding coordinate: 350143.738280
*Top bounding coordinate: 4700000.489995
*Bottom bounding coordinate: 4680270.509783

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, field activity serial number RAFA04019, Interpretation, Bathymetry, Backscatter, Slope, Topography, National Oceanic and Atmospheric Administration, NOAA, National Ocean Service, NOS, NOAA Ship Whiting, Hydrographic Survey, ESRI Shapefile, Bottom Type
Theme keyword thesaurus: General

Theme:
Theme keywords: oceans and estuaries, geoscientificinformation
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:
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: Shapefile
*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:


Lineage:
Source information:
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.  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.

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:
The study area was separated into six units based on local bottom slope, backscatter intensity, surficial sediment texture and anthropogenic activity. These units were delineated qualitatively at a scale of 1:30,000 in areas where both new sidescan sonar and bathymetric data are available (about 155 km2, the source data sets were derived from the datasets described in the previous process step). A local bottom slope was calculated from the 30-m gridded bathymetry as the average slope between the central pixel and the surrounding 8 pixels. Areas smaller than about 200 meters were not delineated. The shapefile was created in ArcGIS 9.1 (ArcMap) by alternating the hillshade, slope and backscatter rasters overlay and manually drawing polygons for the regions representing the six classes of defined bottom type.

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: Vector


Point and vector object information:
SDTS terms description:
*Name: bottomtype
*SDTS point and vector object type: G-polygon
*Point and vector object count: 6

ESRI terms description:
*Name: bottomtype
*ESRI feature type: Simple
*ESRI feature geometry: Polygon
*ESRI topology: FALSE
*ESRI feature count: 6
*Spatial index: FALSE
*Linear referencing: FALSE


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: 32
*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: coordinate pair
Coordinate representation:
*Abscissa resolution: 0.000032
*Ordinate resolution: 0.000032
*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

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Entity and Attribute Information:


Detailed description:
*Name: bottomtype


Entity type:
*Entity type label: bottomtype
*Entity type type: Feature Class
*Entity type count: 6

Attribute:
*Attribute label: FID
*Attribute alias: FID
*Attribute definition:
Internal feature number.
*Attribute definition source:
ESRI

*Attribute type: OID
*Attribute width: 4
*Attribute precision: 0
*Attribute scale: 0


Attribute domain values:
*Unrepresentable domain:
Sequential unique whole numbers that are automatically generated.


Attribute:
*Attribute label: Shape
*Attribute alias: Shape
*Attribute definition:
Feature geometry.
*Attribute definition source:
ESRI

*Attribute type: Geometry
*Attribute width: 0
*Attribute precision: 0
*Attribute scale: 0


Attribute domain values:
*Unrepresentable domain:
Coordinates defining the features.


Attribute:
*Attribute label: FID_newCla
*Attribute alias: FID_newCla
Attribute definition:
Classification ID number

*Attribute type: Number
*Attribute width: 9


Attribute:
*Attribute label: Zone
*Attribute alias: Zone
Attribute definition:
Seafloor map unit name (see Open File Report 2006-1008 for full description of each zone)

*Attribute type: String
*Attribute width: 50


Attribute:
*Attribute label: Area_km
*Attribute alias: Area_km
Attribute definition:
Area (in square kilometers) of each zone in the survey area

*Attribute type: Float
*Attribute width: 19
*Attribute number of decimals: 11


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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: Shapefile
Format version number: ArcGIS 9.x
Format specification:
ESRI Polygon Shapefile
File decompression technique: no compression applied
*Transfer size: 0.865
*Dataset size: 0.865

Digital transfer option:
Online option:
Computer contact information:
Network address:
Network resource name: <http://pubs.usgs.gov/of/2006/1008/gis/datazipped/bottomtype.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/shapes/>

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

Fees: None


Technical prerequisites:
These data are available in Environmental Systems Research Institute (ESRI) Shapefile 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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